IBOC "self noise" -Article

[LinoNYC]

http://www.ham-radio.com/k6sti/iboc.htm

It's an interesting, well written article and for those of us that love oscilloscopes, the piece and hot links within are extra interest.

From the article: "The S/N figures are for a full-deviation 1-kHz tone. RMS levels for uncompressed program material can be up to 25 dB lower. For stations with conservative audio processing, MP1 self-noise may be only 25 dB below the program level and distinctly audible. I've found HD Radio signals to be unlistenable on every tuner I've tried that lacked a special stereo decoder, narrow IF filter, or postdetection filter.

After reading this I decided to do an informal listening test on some common receivers I own.

I limited my choices to stereo, analog only and with headphone jack for the Sennheiser MD 490's that i used. I mostly used older sets that were unlikely to have the post detection circuitry the author cited as necessary to eliminate iboc noise.

Receivers: Pioneer SX-780 and SX-550 (both 1976)

Yamaha CR-1040 (1979)

BeoSound 1 (2001)

Fisher 601 (quadraphonic 1974)

-And a Harmon-Kardon SC-18 compact from 1969 which has excellent FM.

I used WNYC-FM which runs three iboc subs and WQXR -analog only.

Both stations are classical and have low average mod levels and thus could be expected to reveal any background noise.

Bottom line: Even with advanced AF gain levels in quiet passages, I could not discern any difference in background noise level between the station running iboc and the analog-only one.

There was the usuall "whooshing" from multipath that pervades all FM stereo here in the city, it's somewhat variable with antenna placement and not normally as bothersome as the distortion that full-blown multipath can cause.

The concept of FM iboc self-noise is interesting from an academic standpoint, but a non-issue in the real world.

Lino

 

[fybush]

The concept of FM iboc self-noise is interesting from an academic standpoint, but a non-issue in the real world.

Lino

Indeed - and it's been an eye-opener (or perhaps, more accurately, an ear-opener) for me to get to spend some time in recent years listening to Omnia's Frank Foti and Orban's Bob Orban and Greg Ogonowski talk about all the compromises that go into "real-world" analog FM transmission, processing and reception.

Anyone who'd hold analog FM up as an ideal of quality audio should really hear from Frank, in particular, about the damage that the 75 uS pre-emphasis curve does to analog FM audio. They should also hear from Bob about the near-impossibility of multipath-free (and thus noise-free) analog FM reception at his home in the South Bay hills near San Francisco, even with a high mast-mounted outdoor antenna.

Nobody's claiming the FM HD codec is perfect, but Frank, Bob and Greg all seem to think that the compromises it requires are more than balanced by the nonexistent noise floor and at least the potential to get away from the pre-emphasis issues of analog FM.

(And before Freebird jumps in to make the point, as I trust he will - yes, there's the additional compromise that requires, for now, that the HD1 digital blend smoothly with the FM analog, and thus some of these benefits have to be sacrificed, at least for now, in the interests of an inaudible blend.)

 

[Play Freebird]

Scott, you took the words right out of my mouth.

I've set up processing on several HD stations, and smooth blending is definitely considered a high priority by program directors. So, while the digital channel indeed offers a lower noise floor, the processing at most stations won't permit a recording with high dynamic range to take full advantage of this improvement. Then again, most of today's rock and pop releases have minimal dynamic range to begin with, not to mention the sad fact that Classical formats are an endangered species in the US, so this may not be important to the mass market which really buys a radio for its sleek styling -- and the thrill of watching the HD pilot indicator turn on.

As far as IBOC self-noise is concerned, I've observed this problem on only two of my receivers. One is a Technics ST-9030 tuner, designed in the late '70s and still highly regarded for its nearly "bulletproof" front end. This noise is quite noticeable in wide IF mode, but when narrow IF bandwidth is selected, it clears up. There's a problem however; the tuner can be forced into "wide", but not to "narrow" -- I have to depend on an automatic control to select the "best" option and it's not reliable on HD signals. By the way, the ST-9030 is one of the models Brian Beezley tested; see the 7th image down on this page:

http://www.ham-radio.com/k6sti/iboccer.htm

Another receiver that's somewhat susceptible to IBOC self-noise is my trusty Sony SRF-40W FM Walkman -- which, when combined with a good set of headphones, provides surprisingly open and natural stereo audio. (Mike Walker, you should try to find one of these on eBay -- I think you'll be impressed.) Apparently, this receiver has wider-than-average IF bandwidth; I would estimate the IBOC sidebands degrade its S/N ratio by 10 dB on a strong RF signal.

I'll conclude that the "self-noise" is one of HD Radio's less significant drawbacks at the present time -- but if the digital sideband power limit is increased 10 dB, it has the potential to become a real problem.

 

[Chuck]

I'll conclude that the "self-noise" is one of HD Radio's less significant drawbacks at the present time -- but if the digital sideband power limit is increased 10 dB, it has the potential to become a real problem.

I will bet that increased HD sideband power will come to pass, and when that happens a lot more problems will rear their ugly head. It will be a big improvement for some stations and a disaster for others.

Improving FM could have been done rather cheaply by changing the pre-emphasis curve from 75 us to the European standard of 50 us. In fact a few NCE stations do that right now. As has been pointed out by the guys who design processors, the pre-emphasis curve is one of the big problems with FM. No pre-emphasis would be even better, but that would make most radios sound like they were wrapped in a woolen sock.

It costs absolutely nothing to change your pre-emphasis curve. On most processors, it is just the flip of a switch or a quick journey into the menu. While it is true that it is not easy to change the de-emphasis on most radios, the broadcaster can compensate for that in the judicious use of their processing equipment.

 

[clouseau]

Scott, you took the words right out of my mouth.

I've set up processing on several HD stations, and smooth blending is definitely considered a high priority by program directors. So, while the digital channel indeed offers a lower noise floor, the processing at most stations won't permit a recording with high dynamic range to take full advantage of this improvement. Then again, most of today's rock and pop releases have minimal dynamic range to begin with, not to mention the sad fact that Classical formats are an endangered species in the US, so this may not be important to the mass market which really buys a radio for its sleek styling -- and the thrill of watching the HD pilot indicator turn on.

Wise words, my son... My son? Who the heck am I kidding???

Let me take off my engineering hat and put on my Programming/Ops hat.

Here's what THEY want. They being the HD-Program Director. (Professional assessment) I need 3 things...

1) I want the HD to sound GREAT! Do whatever you can do as an engineer to make this new thingy sound as good as humanly possible. I want it to knock our listeners socks off. No compromises. Make it great. I wanna be awarded for great sound on All Access.

2) I understand it doesn't go as far as the old system for some of our distant listeners, but THEY get to hear us like we are now, because the system "Reverts" back to "non-thingy". That's so cool. I also understand at times if you're way out there it "Flips" back and forth. That's OK,too, but let's make sure when it changes, you can't really notice.

3) Remember those bastards down the dial at "96 dot 8 The Toadstool" are still louder than us. Will this "Thingy" fix that? If not, let's be sure, even without the thingy, that we're LOUD!

Sound Familiar?

As far as IBOC self-noise is concerned, I've observed this problem on only two of my receivers. ...

I'll conclude that the "self-noise" is one of HD Radio's less significant drawbacks at the present time -- but if the digital sideband power limit is increased 10 dB, it has the potential to become a real problem.

IMHO, we haven't really committed to anything yet. We've just committed to try and see "IF" we can change. Not to change.

But it ain't bad for the meantime...

Clouseau

 

[Mike Walker]

Chuck, two things about "just going to the European 50us standard". First, you'd be using less pre-emphasis than ALL of today's FM tuners are designed for. Which means EVERY FM STATION WOULD IMMEDIATELY SOUND DULLER ON EXISTING RADIOS! That would certainly "help the cause!"

Second, using less pre-emphasis would result in LESS NOISE REDUCTION, so FM would be hissier on new radios! I thought reducing noise was one of our goals!?

 

[Chuck]

Chuck, two things about "just going to the European 50us standard". First, you'd be using less pre-emphasis than ALL of today's FM tuners are designed for. Which means EVERY FM STATION WOULD IMMEDIATELY SOUND DULLER ON EXISTING RADIOS! That would certainly "help the cause!"

Second, using less pre-emphasis would result in LESS NOISE REDUCTION, so FM would be hissier on new radios! I thought reducing noise was one of our goals!?

You would think so, but there are a few Public stations that are doing it right now and report very good results.

I have to admit I was skeptical too, but I've tried it myself, and the "dull" sound is not as noticeable as you might think. In fact, taking some of the radical EQ from the pre-emphasis curve out of the domain of the limiter makes is sound a bit more "open." It is at the expense of some high frequency response on a conventional receiver, but most people would never notice it. It is nothing you couldn’t easily compensate for if you had a “treble” control on your receiver. Their old radios would work OK and new radios that included the right curve would sound a lot better.

I doubt you'd notice an audible increase in noise either. It has worked fine in Europe for a very long time.

 

[Mike Walker]

Well Chuck, I wouldn't use Europe as an example of why things should work well here, because they work well there. Remember, a large American city like NY, or LA has more radio stations than most European COUNTRIES! European radio bands are largely notable for their (relative) emptiness!

 

[Play Freebird]

Well Chuck, I wouldn't use Europe as an example of why things should work well here, because they work well there. Remember, a large American city like NY, or LA has more radio stations than most European COUNTRIES! European radio bands are largely notable for their (relative) emptiness!

That may have been true 30 or 40 years ago, but since most of those countries began awarding licenses to private broadcasters in the 1980s, the FM band has quickly filled up across Europe. For example, Switzerland (with half the land area of South Carolina) has over 1,300 FM transmitters, including LPFM and translators - and some private Swiss broadcasters are now running limited tests of FM IBOC. Italy now has over 13,000 stations. I visited Rome three years ago and copied 80 FM stations from my hotel room in the central part of the city.

If you would like to research this further, here's a link to a very good online worldwide FM station database. It's maintained in Germany so the central European listings are probably most accurate, but you'll see many USA stations listed too, along with RDS PI and PS data. Click "Continue as Guest" on the right side of the homepage to see the station listings. Note that many program services or networks simulcast on multiple frequencies within a region, using RDS to automatically tune receivers.

The frequency list defaults to Germany, but you can select another country in the upper left corner. SUI is Switzerland, F - France, G is the UK, S - Sweden, I - Italy, IRL - Ireland, E - Spain, J -Japan, and I'll let you figure out the rest. See:

http://www.fmlist.org/ul_login.php?sprache=en

Browsing the list makes it clear that the world is now awash in FM radio -- and just think... this all got started in America, in Major Armstrong's lab. A couple of decades later, a few engineers at Zenith and GE developed the FM stereo system now used throughout the world. But will we be saying the same about IBOC 50 years from now? I have a feeling that GREED will be responsible for HD Radio's downfall.

 

[Chuck]

Well Chuck, I wouldn't use Europe as an example of why things should work well here, because they work well there. Remember, a large American city like NY, or LA has more radio stations than most European COUNTRIES! European radio bands are largely notable for their (relative) emptiness!

I guess you haven't been to Europe recently. The FM band in most countries is very crowded, yet it seems to work.

In some European cities, the FM band is much more crowded than anything you’ll find in the US. In fact, that situation may doom HD in some parts of Europe because the sidebands could be a big problem in these super crowded areas. To make it work, they may have to do some serious housecleaning.

I was just pointing out that analog FM could be improved quite a bit in this country by doing a simple change that would cost nothing more than a few minutes time. Our aggressive pre-emphasis curve causes a lot of undesirable side effects with the audio processing chain.

Most people think that out 75us curve is mandated by the FCC, but it is not. The rules state that the curve "shall not exceed 75us," but it does not preclude the use of a less aggressive equalization.

Greater minds than mine have suggested this, including names you would recognize in the world of high end audio processing. It seems that some NPR/PRI stations do it now and get compliments about how good the station sounds. There was quite a discussion about this on the Pubtech Digest about a year or so ago.

 

[R.F. Burns]

"In some European cities, the FM band is much more crowded than anything you’ll find in the US"

Please, what cities are you refering to? I've been to London & Paris and all over Scotland & none compares with the number of stations we have in NYC. There are NO frequencies open here. If you can tell me which cities in Europe have more stations on the FM band than any other city in the US. Once you tell me which cities FM bands are more crowded, I can check for myself if there's a DX Tuner available. Same goes for AM. Even with their high powered stations and 9 Khz spacing, their AM band is nowhere near as crowded as the AM BCB in NYC.

 

[Play Freebird]

Please, what cities are you refering to? I've been to London & Paris and all over Scotland & none compares with the number of stations we have in NYC. There are NO frequencies open here. If you can tell me which cities in Europe have more stations on the FM band than any other city in the US. Once you tell me which cities FM bands are more crowded, I can check for myself if there's a DX Tuner available. Same goes for AM. Even with their high powered stations and 9 Khz spacing, their AM band is nowhere near as crowded as the AM BCB in NYC.

As mentioned in my previous post, I found a large number of FM stations in Rome; about 80 listenable signals received on an FM Walkman (with continuously-variable tuning, of course.) I wasn't at a high elevation either, these were received in a second floor hotel room about 1 km north of the Colosseum.

The ability to assign stations in 100 kHz steps offers the flexibility to use 300 kHz local separations, where in a market like New York, the suburban Class As must be offset 400 kHz from the in-city Class B stations.

In London, the BBC actually uses 304 kHz offset between the regional transmitters at Wrotham and the urban fill-in stations at the Crystal Palace. First person to guess the significance of 304 wins a piece of swag from iBiquity, but you'll need to pay the shipping. BTW, Scott Fybush has a TSOW featuring these London sites:

http://www.fybush.com/site-020710.html

 

[SUPERCASTER]

"In some European cities, the FM band is much more crowded than anything you’ll find in the US"

Please, what cities are you refering to? I've been to London & Paris and all over Scotland & none compares with the number of stations we have in NYC. There are NO frequencies open here. If you can tell me which cities in Europe have more stations on the FM band than any other city in the US. Once you tell me which cities FM bands are more crowded, I can check for myself if there's a DX Tuner available. Same goes for AM. Even with their high powered stations and 9 Khz spacing, their AM band is nowhere near as crowded as the AM BCB in NYC.

FM Frequencies
for:
London(approx. center)
(00w06/51n29)
change location


frequency: 65 to 108, output max. 1000, tropo factor: 0, rcv ant HAAT: 30 m, threshold: 40 dB, range: 10 dB, exc. inactive, radius 300, (04w26/54n11)-(04e14/48n47)



change parameters


95 stations within threshold
MHz Cty Programme Transmitter Pdir Pmax Dist Azi dBµV
88.10m G BBC Radio 2 Guildford (sur) 3 3 46km 231° 56 i
88.40v G BBC Radio 2 Kenley (col) 0.025 19km 180° 55 i
88.50m G BBC Radio 2 Rowridge (iow) 250 250 127km 225° 44 i
88.60m G BBC Radio 2 Bow Brickhill (bks) 10 10 69km 325° 48 i
88.80v G BBC Radio 2 Crystal Palace (col) 4 4 8km 167° 84 i
89.10m G BBC Radio 2 Wrotham (knt) 250 250 33km 125° 86 i
89.50m G BBC Radio 2 Oxford (oxf) 18 46 82km 295° 51 i
89.70v G BBC Radio 2 Caterham (sur) 0.015 23km 174° 50 i
89.70v G BBC Radio 2 Mickleham (sur) 0.025 0.025 30km 213° 46 i
90.30m G BBC Radio 3 Guildford (sur) 3 3 46km 231° 56 i
90.40v G BBC 3Counties Radio Hertford/Epping Green (hts) 0.1 0.1 28km 356° 55 i
90.60v G BBC Radio 3 Kenley (col) 0.025 19km 180° 55 i
90.70m G BBC Radio 3 Rowridge (iow) 250 250 127km 225° 44 i
90.80m G BBC Radio 3 Bow Brickhill (bks) 10 10 69km 325° 48 i
91.00v G BBC Radio 3 Crystal Palace (col) 4 4 8km 167° 84 i
91.30m G BBC Radio 3 Wrotham (knt) 250 250 33km 125° 86 i
91.70m G BBC Radio 3 Oxford (oxf) 18 46 82km 295° 51 i
91.80v G Hayes FM London-Hayes/St Anselms Church (col) 0.025 22km 274° 53 i
91.90v G BBC Radio 3 Caterham (sur) 0.015 23km 174° 50 i
91.90v G BBC Radio 3 Mickleham (sur) 0.025 0.025 30km 213° 46 i
92.00v G Nusound Newham/Forest Gate (col) 0.006 0.025 11km 55° 53 i
92.10v G BBC 3Counties Radio Hemel Hempstead (hts) 0.05 0.05 35km 320° 46 i
92.20v G Link FM Havering/Harold Hill (col) 0.025 27km 60° 49# i
92.50m G BBC Radio 4 FM Guildford (sur) 3 3 46km 231° 56 i
92.60m G Radio Verulam Saint Albans (hts) 0.05 33km 331° 46 i
92.80v G BBC Radio 4 FM Kenley (col) 0.025 19km 180° 55 i
92.90m G BBC Radio 4 FM Rowridge (iow) 250 250 127km 225° 44 i
93.00m G BBC Radio 4 FM Bow Brickhill (bks) 10 10 69km 325° 48 i
93.20v G BBC Radio 4 FM Crystal Palace (col) 4 4 8km 167° 84 i
93.50m G BBC Radio 4 FM Wrotham (knt) 250 250 33km 125° 86 i
93.90m G BBC Radio 4 FM Oxford (oxf) 18 46 82km 295° 51 i
94.10v G BBC Radio 4 FM Caterham (sur) 0.015 23km 174° 50 i
94.10v G BBC Radio 4 FM Mickleham (sur) 0.025 0.025 30km 213° 46 i
94.30v G The Voice of Africa London-Plaistow (col) 0.025 10km 48° 60# i
94.90m G BBC London 94.9 Crystal Palace (col) 4 8km 167° 84 i
95.20m G BBC Oxford 95.2 Oxford (oxf) 2.9 5.8 82km 295° 43 i
95.30m G BBC Essex South Benfleet (esx) 1 1.2 48km 82° 49 i
95.40v G BBC R.Berkshire Windsor (rea) 0.5 35km 269° 56 i
95.50m G BBC 3Counties Radio Sandy Heath (bef) 1 1 72km 352° 41 i
95.80m G Capital Radio Croydon (col) 4 9km 174° 83 i
96.20m G KMFM Tunbridge Wells/TV Tower (knt) 0.15 0.19 45km 142° 40 i
96.30 G Big Blue Chelsea Football Club (col) 0.01 6km 263° 61 i
96.40m G 96.4 The Eagle Guildford (sur) 3 3 46km 231° 56 i
96.60m G Mercury FM Hemel Hempstead (hts) 0.13 0.5 35km 320° 49 i
96.70m G BBC R.Kent Wrotham (knt) 0.5 8.7 33km 125° 59 i
96.90v G Choice FM Crystal Palace (col) 0.03 0.03 8km 167° 63 i
97.30m G LBC 97.3 Croydon (col) 4 9km 174° 83 i
97.60m G Chiltern FM Luton/Zouches Farm (bef) 1 51km 329° 49 i
97.70m G BBC Radio 1 Guildford (sur) 3 3 46km 231° 56 i
98.00v G BBC Radio 1 Kenley (col) 0.025 19km 180° 55 i
98.20m G BBC Radio 1 Bow Brickhill (bks) 10 10 69km 325° 48 i
98.20m G BBC Radio 1 Rowridge (iow) 250 250 127km 225° 44 i
98.50v G BBC Radio 1 Crystal Palace (col) 4 4 8km 167° 84 i
98.80m G BBC Radio 1 Wrotham (knt) 125 125 33km 125° 83 i
99.10m G BBC Radio 1 Oxford (oxf) 18 46 82km 295° 51 i
99.30v G BBC Radio 1 Caterham (sur) 0.015 23km 174° 50 i
99.30v G BBC Radio 1 Mickleham (sur) 0.025 0.025 30km 213° 46 i
100.00m G Kiss FM Croydon (col) 2 4 9km 174° 80 i
100.30m G Classic FM Rowridge (iow) 250 250 127km 225° 44 i
100.40m G Classic FM Bow Brickhill (bks) 5 10 69km 325° 45 i
100.60v G Classic FM Crystal Palace (col) 2 2 8km 167° 81 i
100.90m G Classic FM Wrotham (knt) 250 250 33km 125° 86 i
101.30m G Classic FM Oxford (oxf) 18 46 82km 295° 51 i
101.60m G KMFM Wrotham (knt) 0.06 0.4 33km 125° 50 i
101.70m G Ten 17 Harlow/Rye Hill (esx) 0.1 0.1 31km 26° 47 i
102.20m G 102.2 Smooth FM Croydon (col) 2 4 9km 174° 80 i
102.40m G Southern FM Heathfield (esu) 8 8.2 62km 158° 53 i
102.60m G Essex FM Chelmsford/Bakers Wood (esx) 2 2 42km 55° 54 i
102.60m G Fox FM Oxford (oxf) 4.5 9 82km 295° 45 i
102.70m G Mercury FM Reigate (sur) 0.46 3.6 27km 195° 61 i
102.90m G 2-Ten FM Hannington/Basingstoke (hps) 4 83km 256° 43 i
103.10m G Invicta FM Bluebell Hill (knt) 4 4 46km 107° 57 i
103.30v G London Greek Radio London NW/Alexandra Palace (col) 0.025 0.05 12km 350° 59 i
103.50m G BBC Essex Great Braxted (esx) 12 12 66km 58° 50 i
103.60v G Life FM London-Harlesden (col) 0.025 13km 296° 58 i
103.70 G TGR Sound Bexley/Belvedere (col) 18km 91° 71 i
103.80m G BBC 3Counties Radio Luton/Zouches Farm (bef) 0.13 0.5 51km 329° 41 i
104.00m G BBC Southern Counties Radio Reigate (sur) 0.48 3.8 27km 195° 62 i
104.10m G BBC R.Berkshire Hannington/Basingstoke (hps) 3 83km 256° 44 i
104.40m G Resonance FM London/Guys Hospital Tower (col) 0.05 2km 31° 77 i
104.50m G BBC Southern Counties Radio Heathfield (esu) 1.3 10 62km 158° 45 i
104.60m G BBC Southern Counties Radio Guildford (sur) 0.8 3 46km 231° 50 i
104.80v G BBC Southern Counties Radio Burton Down (wsu) 2 74km 210° 40 i
104.90m G XFM Crystal Palace (col) 1 3.9 8km 167° 78 i
105.40m G Magic 105.4 Croydon (col) 2 4 9km 174° 80 i
105.80m G Virgin FM Crystal Palace (col) 2 3.73 8km 167° 81 i
106.20m G Heart 106.2 Croydon (col) 2 4 9km 174° 80 i
106.60m G Time FM Slough/Industrial Estate (rea) 0.13 0.24 37km 276° 48 i
106.80m G Time FM Thamesmead/Shooters Hill (col) 0.003 0.18 12km 100° 50 i
106.90m G Hertbeat FM Hertford/Cole Green (hts) 0.25 0.28 33km 356° 43 i
107.10v G Choice FM London NW/Alexandra Palace (col) 0.1 0.1 12km 350° 65 i
107.30m G Time FM (South London Radio) Lewisham/Bredgar (col) 0.2 0.8 7km 126° 73 i
107.50m G Soul City 107.5 Havering/Lambourne House (col) 0.1 0.34 22km 64° 59 i
107.80m G 107.8 Radio Jackie London-Kingston/Tolworth Tower (col) 0.1 0.8 18km 225° 61 i




f= fading, varying signal
#= transmitter antenna height unknown
The prediction is for outdoor reception in a free area.
Signals lose up to 10 dB near the ground if there are buildings or forests around
Indoor reception leads to an additional loss of 5 to 20 dB


How would HD radio (In Band Adjacent Channel) work in this environment?

 

[SUPERCASTER]

"In some European cities, the FM band is much more crowded than anything you’ll find in the US"

Please, what cities are you refering to? I've been to London & Paris and all over Scotland & none compares with the number of stations we have in NYC. There are NO frequencies open here. If you can tell me which cities in Europe have more stations on the FM band than any other city in the US. Once you tell me which cities FM bands are more crowded, I can check for myself if there's a DX Tuner available. Same goes for AM. Even with their high powered stations and 9 Khz spacing, their AM band is nowhere near as crowded as the AM BCB in NYC.

FM Frequencies
for:
Paris
(02e20/48n52)
change location


frequency: 65 to 108, output max. 1000, tropo factor: 0, rcv ant HAAT: 30 m, threshold: 40 dB, range: 10 dB, exc. inactive, radius 300, (01w46/51n34)-(06e26/46n10)



change parameters


149 stations within threshold
MHz Cty Programme Transmitter Pdir Pmax Dist Azi dBµV
87.60v F France Inter Beaumont-sur-Oise/les Sablons (95) 0.13 0.5 31km 353° 51 (58 / -30) i
87.80v F France Inter Paris/Tour Eiffel (75) 10 10 3km 251° 97 (97 / -10) i
88.00v F Evasion FM Melun/tour 60 (77) 0.25 1 44km 145° 44 (58 / -33) i
88.00v F Beur FM Creil/Apremont (60) 0.05 0.2 42km 17° 40 (51 / -32)# i
88.20v F Generations 88.2 Bagnolet(Paris)/Tour Mercuriales Ouest (93) 4 6km 89° 87 (87 / -16) i
88.40v F Marmite FM/Yvelines Radio Trappes/Montigny-le-Bretonne (78) 2 24km 247° 70 (72 / -28) i
88.40v F R. Maryse Bastié Viry-Châtillon/12, place René-Coty (91) 0.13 0.5 22km 172° 60 (61 / -27)# i
88.60v F Méditerranée FM/R. Soleil Paris/59 Rue Saint-Blaise (75) 4 4 6km 100° 87 (87 / -16) i
88.70v F Rire et Chansons Étampes/Grange des Noyers (91) 1 47km 190° 45 (63 / -33) i
88.80v F Evasion FM Fontainebleau/Le Montoir (77) 2 2 65km 143° 43 (63 / -36) i
88.80v F Evasion FM Meaux/Ferme de Chaillouet (77) 0.08 0.3 41km 72° 43 (53 / -32)# i
88.80v F Virgin Radio Chaufour-lès-Bonnières/Château d'eau LAM (78) 2 64km 286° 43 (63 / -36) i
88.80v F Evasion FM Creil/Apremont (60) 0.05 0.2 42km 17° 40 (51 / -32)# i
89.00v F RFI Paris Paris/Tour Eiffel (75) 10 10 3km 251° 97 (97 / -10) i
89.20v F Radio + Étampes/Grange des Noyers (91) 1 47km 190° 45 (63 / -33) i
89.20h F France Musique Reims-Épernay/Hautvillers (51) 38 150 120km 77° 40 (71 / -41) i
89.30 F France Culture Meaux/la Justice (77) 0.05 0.2 40km 80° 40 (51 / -32) i
89.40v F Radio Libertaire Bagnolet(Paris)/Tour Mercuriales Ouest (93) 4 6km 89° 87 (87 / -16) i
89.60h F France Culture Villers-Cotterêts/Fleury (02) 3.8 10 75km 52° 46 (65 / -37) i
89.60 F France Culture Arpajon/la Grange au Prieur (91) 0.025 0.1 32km 189° 42 (50 / -30) i
89.70h F France Musique Chartres/Montlandon (28) 32 32 110km 242° 43 (71 / -41) i
89.90v F TSF Jazz Paris/Tour Eiffel (75) 6.3 3km 251° 95 (95 / -10) i
90.20v F Nostalgie Melun/7 Rue Claude Bernard (77) 0.25 1 44km 145° 46 (58 / -33)# i
90.20v F NRJ La Ferté-sous-Jouarre/Croix de Mission (77) 1 1 58km 83° 41 (61 / -35) i
90.40v F Nostalgie Paris/Tour Eiffel (75) 10 10 3km 251° 97 (97 / -10) i
90.60v F RMC Info Melun/Bois de Montaigu (77) 0.25 1 42km 146° 47 (58 / -32)# i
90.60v F RMC Info Meaux/Ferme de Chaillouet (77) 0.08 0.3 41km 72° 43 (53 / -32)# i
90.90v F Chante France Paris/Tour Eiffel (75) 1 3km 251° 87 (87 / -10) i
91.10h F France Inter Villers-Cotterêts/Fleury (02) 3.8 10 75km 52° 46 (65 / -37) i
91.30v F Chérie FM Paris/Tour Eiffel (75) 10 10 3km 251° 97 (97 / -10) i
91.50v F Only Raï La Ferté-sous-Jouarre/la Gambière (77) 1 1 60km 81° 40 (61 / -35) i
91.70v F France Musique Paris/Tour Eiffel (75) 10 10 3km 251° 97 (97 / -10) i
91.90v F France Musique Beaumont-sur-Oise/les Sablons (95) 0.13 0.5 31km 353° 51 (58 / -30) i
92.00h F France Musique Rouen/Grand Couronne (76) 100 100 110km 299° 47 (76 / -41) i
92.10v F Le Mouv' Paris/Tour Eiffel (75) 8 3km 251° 96 (96 / -10) i
92.30v F Africa No 1 Melun/Bois de Montaigu (77) 0.25 1 42km 146° 47 (58 / -32)# i
92.40h F France Culture Mantes-la-Jolie/Maudétour (78) 5 5 49km 301° 60 (70 / -34) i
92.50v F Evasion FM Dourdan/St. Chéron (91) 0.25 1 39km 203° 41 (59 / -32) i
92.60v F Média Tropical(Tropiques FM) Bagnolet(Paris)/Tour Galliéni I (93) 4 6km 93° 87 (87 / -16) i
92.80v F Music Box Pontoise/Vaux-sur-Seine (95) 2 2 29km 304° 66 (70 / -29) i
92.90h F France Musique Villers-Cotterêts/Fleury (02) 3.8 10 75km 52° 46 (65 / -37) i
93.10v F R. Pays/Aligre FM Bagnolet(Paris)/Tour Mercuriales Ouest (93) 4 4 6km 89° 87 (87 / -16) i
93.30v F France Culture Beaumont-sur-Oise/les Sablons (95) 0.13 0.5 31km 353° 51 (58 / -30) i
93.50v F France Culture Paris/Tour Eiffel (75) 10 10 3km 251° 97 (97 / -10) i
93.90v F Vivre FM/R. Campus Paris Bagnolet(Paris)/Tour Mercuriales Ouest (93) 4 4 6km 89° 87 (87 / -16) i
94.00h F France Culture Rouen/Grand Couronne (76) 100 100 110km 299° 47 (76 / -41) i
94.00v F France Maghreb 2 Clermont-Ferrand/Plaine (63) 0.5 0.5 55km 97° 42 (59 / -35)# i
94.10v F Nostalgie Creil/Apremont (60) 0.05 0.2 42km 17° 40 (51 / -32)# i
94.30v F R.Orient Paris/Tour Eiffel (75) 4 3km 251° 93 (93 / -10) i
94.50v F Radio Capucins Melun/collège Capucins (77) 1 43km 145° 42 (64 / -33) i
94.50v F Europe 1 Creil/Apremont (60) 0.05 0.2 42km 17° 40 (51 / -32)# i
94.60v F Only Raï Meaux/la Justice (77) 1 1 40km 80° 52 (64 / -32) i
94.60h F France Inter Chartres/Montlandon (28) 32 32 110km 242° 43 (71 / -41) i
94.80v F Shalom/Judaïques FM/RCJ/Radio J Paris/Hotel Concorde Lafayette (75) 4 4 4km 292° 90 (90 / -12) i
94.90v F Radio FG Melun/7 Rue Claude Bernard (77) 0.08 0.3 44km 145° 41 (53 / -33)# i
95.00h F France Inter Mantes-la-Jolie/Maudétour (78) 5 5 49km 301° 60 (70 / -34) i
95.20v F R.Ici-et-Maintenant/R. Néo Bagnolet(Paris)/Tour Mercuriales Ouest (93) 0.5 4 6km 89° 78 (78 / -16) i
95.40 F France Inter Villebon/Laplesse (91) 0.25 1 21km 203° 63 (64 / -26) i
95.40h F France Inter Amiens/Saint-Just-en-Chaussée (80) 20 20 71km 4° 57 (72 / -37) i
95.50v F RDC/Radio ZEP Mantes-la-Jolie/les Carrières (78) 2 46km 282° 43 (66 / -33) i
95.60v F R.Courtoisie Paris/Fort de Romainville (93) 4 4 7km 72° 86 (86 / -17) i
95.80v F 77 FM Meaux/Crégy-les-Meaux (77) 3 3 41km 73° 57 (69 / -32) i
96.00v F Skyrock Paris/Tour Eiffel (75) 10 10 3km 251° 97 (97 / -10) i
96.20v F R.Vexin Val-de-Seine Mantes-la-Jolie/Issou (78) 0.5 2 42km 291° 42 (61 / -32) i
96.40v F BFM Paris/Tour Eiffel (75) 1 3km 251° 87 (87 / -10) i
96.50v F Vibration Dourdan-Sermaise/Ch. d'eau de Blancheface (91) 2 44km 212° 50 (67 / -33) i
96.50h F France Inter Rouen/Grand Couronne (76) 100 100 110km 299° 47 (76 / -41) i
96.60v F Vallée FM Noisiel/La Calotte (77) 2 21km 100° 72 (73 / -26) i
96.70v F Alternative FM Beaumont-sur-Oise/chateau d'eau (95) 1 4 27km 1° 65 (68 / -29) i
96.80h F France Inter Reims-Épernay/Hautvillers (51) 38 150 120km 77° 40 (71 / -41) i
96.90v F Voltage FM Paris/Tour Eiffel (75) 0.5 4 3km 251° 84 (84 / -10) i
97.10 F France Musique Villebon/Laplesse (91) 0.25 1 21km 203° 63 (64 / -26) i
97.10h F France Musique Mantes-la-Jolie/Maudétour (78) 5 5 49km 301° 60 (70 / -34) i
97.20v F Menhir FM Plailly (60) 0.1 32km 35° 45 (56 / -30) i
97.40v F Rire et Chansons Paris/Tour Eiffel (75) 4 4 3km 251° 93 (93 / -10) i
97.60v F Rire et Chansons Beaumont-sur-Oise/Andilly (95) 0.13 0.5 16km 352° 64 (64 / -24)# i
97.80v F Ado FM Bagnolet(Paris)/Tour Mercuriales Ouest (93) 4 6km 89° 87 (87 / -16) i
98.00v F ID FM Taverny/Butte de Montrouille (95) 1 4 13km 330° 74 (74 / -22) i
98.10h F France Culture Chartres/Montlandon (28) 32 32 110km 242° 43 (71 / -41) i
98.20v F Radio FG Bagnolet(Paris)/Tour Mercuriales Ouest (93) 4 6km 89° 87 (87 / -16) i
98.40v F Vallée FM 98,4 Torcy/Les Totems (77) 0.5 2 21km 98° 67 (67 / -26)# i
98.40v F Triangle FM Trappes/Montigny-le-Bretonne (78) 0.5 2 24km 247° 64 (66 / -28) i
98.60v F Radio Alfa Bagnolet(Paris)/Tour Galliéni I (93) 4 6km 93° 87 (87 / -16) i
98.80v F Espace FM Taverny/Butte de Montrouille (95) 1 4 13km 330° 74 (74 / -22) i
98.90v F Triangle FM Étampes/le Tronchet (91) 0.25 1 52km 203° 40 (56 / -34)# i
99.00v F R.Latina Bagnolet(Paris)/Tour Mercuriales Ouest (93) 4 6km 89° 87 (87 / -16) i
99.20v F RGB 99,2 (Ginglet la Boucle) Pontoise/Vauréal (95) 4 29km 311° 66 (73 / -29) i
99.30v F Rire et Chansons Montlhéry-La Ville du Bois/Towercast (91) 2 24km 189° 70 (72 / -28) i
99.40h F France Musique Amiens/Saint-Just-en-Chaussée (80) 20 20 71km 4° 57 (72 / -37) i
99.50v F France Maghreb/AYP FM Paris/Fort de Romainville (93) 4 4 7km 72° 86 (86 / -17) i
99.70v F FMC Radio Creil/Apremont (60) 0.05 0.2 42km 17° 40 (51 / -32)# i
99.90v F Sport MX Paris/Tour Eiffel (75) 1 1 3km 251° 87 (87 / -10) i
100.10h F France Bleu Haute Normandie Rouen/Grand Couronne (76) 100 100 110km 299° 48 (76 / -41) i
100.10v F NRJ Melun/tour 60 (77) 0.25 1 44km 145° 43 (58 / -33) i
100.10v F NRJ Meaux/Ferme de Chaillouet (77) 0.08 0.3 41km 72° 43 (53 / -32)# i
100.30v F NRJ Paris/Tour Eiffel (75) 10 10 3km 251° 97 (97 / -10) i
100.50h F France Bleu Auxerre Sens/Gisy-les-Nobles (89) 10 10 94km 131° 45 (67 / -39) i
100.70v F R.Notre Dame/Fréqu. Protestante Paris/Tour Eiffel (75) 10 10 3km 251° 97 (97 / -10) i
101.10v F R.Classique Paris/Tour Eiffel (75) 10 10 3km 251° 97 (97 / -10) i
101.30v F Parenthèse Radio Meaux/la Justice (77) 0.08 0.3 40km 80° 43 (53 / -32)# i
101.50v F Radio Nova Paris/Tour Eiffel (75) 10 10 3km 251° 97 (97 / -10) i
101.70v F R.Cristal Mantes-la-Jolie/les Carrières (78) 2 46km 282° 46 (66 / -33) i
101.90v F Fun Radio Paris/Tour Eiffel (75) 10 10 3km 251° 97 (97 / -10) i
102.10v F Oui FM Melun/Bois de Montaigu (77) 0.25 1 42km 146° 47 (58 / -32)# i
102.10v F FMC Radio Clermont/la Montagne (60) 2 2 55km 12° 46 (65 / -35) i
102.30v F Ouï FM Paris/Tour Eiffel (75) 4 4 3km 251° 93 (93 / -10) i
102.50h F France Culture Amiens/Saint-Just-en-Chaussée (80) 20 20 71km 4° 57 (72 / -37) i
102.50v F Fun Radio Melun/Bois de Montaigu (77) 0.25 1 42km 146° 47 (58 / -32)# i
102.70v F M'FM Bagnolet(Paris)/Tour Mercuriales Ouest (93) 10 40 6km 89° 91 (91 / -16) i
102.90v F Voltage FM Meaux/la Justice (77) 3 3 40km 80° 57 (69 / -32) i
103.10v F RMC Info Paris/Tour Eiffel (75) 10 10 3km 251° 97 (97 / -10) i
103.50v F Virgin Radio Paris/Tour Eiffel (75) 10 10 3km 251° 97 (97 / -10) i
103.70v F Virgin Radio Meaux/Ferme de Chaillouet (77) 0.08 0.3 41km 72° 43 (53 / -32)# i
103.70v F R.Vieille-Eglise - RVE 103,7 Rambouillet/Vieille-Eglise (78) 0.25 1 40km 237° 42 (58 / -32) i
103.70v F Virgin Radio Fontainebleau/La Croix d'Augas (77) 0.5 2 56km 150° 41 (59 / -35)# i
103.70v F RTL Creil/Apremont (60) 0.05 0.2 42km 17° 40 (51 / -32)# i
103.90v F RFM Paris/Tour Eiffel (75) 10 10 3km 251° 97 (97 / -10) i
104.10v F RTL Melun/Bois de Montaigu (77) 0.25 1 42km 146° 47 (58 / -32)# i
104.30v F RTL Paris/Tour Eiffel (75) 10 10 3km 251° 97 (97 / -10) i
104.50v F Europe 1 Melun/7 Rue Claude Bernard (77) 0.25 1 44km 145° 46 (58 / -33)# i
104.70v F Europe 1 Paris/Tour Eiffel (75) 10 10 3km 251° 97 (97 / -10) i
104.90v F Fun Radio Fontainebleau/Le Montoir (77) 1 65km 143° 41 (60 / -36) i
105.10v F FIP Paris/Tour Eiffel (75) 10 10 3km 251° 97 (97 / -10) i
105.50v F France Info Paris/Tour Eiffel (75) 10 10 3km 251° 97 (97 / -10) i
105.70v F France Info Melun/tour 60 (77) 0.25 1 44km 145° 48 (58 / -33) i
105.90v F RTL 2 Paris/Tour Eiffel (75) 10 10 3km 251° 97 (97 / -10) i
106.10v F RTL 2 Creil/Apremont (60) 0.2 0.2 42km 17° 44 (57 / -32) i
106.30v F F P P (Fréquence Paris Plurielle) Bagnolet(Paris)/Tour Galliéni I (93) 4 4 6km 93° 87 (87 / -16) i
106.50v F Alternative FM Taverny/Domont (95) 1 4 17km 357° 72 (72 / -25) i
106.70v F Beur FM Bagnolet(Paris)/Tour Mercuriales Ouest (93) 4 4 6km 89° 87 (87 / -16) i
106.90v F NRJ Mantes-la-Jolie/Follainville (78) 2 2 49km 290° 53 (66 / -34) i
106.90v F Skyrock Melun/7 Rue Claude Bernard (77) 0.25 1 44km 145° 46 (58 / -33)# i
107.10v F France Bleu Île-de-France Paris/Tour Eiffel (75) 4 10 3km 251° 93 (93 / -10) i
107.30v F R.Classique Chantilly/Apremont (60) 1 4 42km 16° 50 (64 / -32) i
107.50v F Africa No.1 Paris/53 Rue Compans (75) 4 5km 73° 88 (88 / -14) i


How would HD radio (In Band Adjacent Channel) work in this environment?

 

[SUPERCASTER]

How would HD radio (In Band Adjacent Channel) work in this environment?

FM Frequencies
for:
Rome (Lower end of FM band) 87.5 to 99.9 mHz
(12e29/41n54)
change location


frequency: 65 to 108, output max. 1000, tropo factor: 0, rcv ant HAAT: 30 m, threshold: 40 dB, range: 10 dB, exc. inactive, radius 300, (08e51/44n36)-(16e07/39n12)

Total FM band 388 stations within threshold

MHz Cty Programme Transmitter Pdir Pmax Dist Azi dBµV
87.50 I Radio Suby Caprarola-Poggio Nibbio (vt) 58km 333° 51 (61 / -35) i
87.50 I Radio Galileo Stroncone (tr) 68km 13° 42 (60 / -37) i
87.60c I RAI Radiouno Monte Cavo (RAI) (rm) 32 40 26km 131° 82 (83 / -28) i
87.80 I RTL 102.5 Poggi d'Oro (rm) 32km 145° 52 (66 / -30) i
87.80 I Radio Cuore Lariano (rm) 35km 125° 47 (66 / -31) i
87.80 I Radio Subasio Segni (rm) 50km 118° 45 (63 / -34) i
87.90v I Radio Onda Rossa-ROR Monte Cavo (rm) 5 26km 131° 74 (75 / -28) i
88.00 I Radio Sei Velletri (rm) 35km 134° 47 (66 / -31) i
88.00 I R101 Segni (rm) 50km 118° 45 (63 / -34) i
88.10 I Nuova Spazio Radio Monte Cavo (rm) 26km 131° 67 (68 / -28) i
88.20 I Radiomania Velletri/Colle Giorgi (rm) 35km 134° 47 (66 / -31) i
88.30 I Radio Subasio Più Roma/Centocelle-Via dei Gelsi (rm) 1 7km 105° 80 (80 / -17) i
88.40 I Soloradio Anagni-Monte Scalambra (fr) 52km 92° 54 (62 / -34) i
88.40 I Radio Radicale Arsoli (rm) 48km 72° 51 (63 / -34) i
88.40 I RAI Radiouno Filettino (RAI) (fr) 69km 91° 46 (60 / -37) i
88.60 I Radio Radicale Monte Cavo (rm) 26km 131° 67 (68 / -28) i
88.70h I RAI Radiouno Velletri (RAI) (rm) 0.15 15 29km 139° 56 (59 / -29) i
88.70 I Onda Verde Monte Calcarone (ri) 73km 30° 47 (59 / -37) i
88.70 I Radio Studio 5 Pereto-Località Santa Maria dei Bisognosi (aq) 53km 72° 46 (62 / -34)# i
88.80h I RAI Radiouno Monte Favone (RAI) (fr) 30 101km 109° 52 (71 / -40) i
88.90 I Radio Città Aperta Monte Cavo (rm) 26km 131° 67 (68 / -28) i
89.00 I Rete Sport Cori (lt) 47km 129° 54 (63 / -33) i
89.10 I Radio Italia Anni 60 Monte Cavo (rm) 26km 131° 67 (68 / -28) i
89.20 I Radio Kiss Kiss Caprarola-Poggio Nibbio (vt) 58km 333° 51 (61 / -35) i
89.20 I Max Radio Classic Monte Calcarone (ri) 73km 30° 47 (59 / -37) i
89.30 I Radio Jukebox Monte Cavo (rm) 26km 131° 67 (68 / -28) i
89.30 I Radio Italia Anni 60 Velletri (rm) 29km 139° 63 (67 / -29) i
89.40 I Radio Classica Cori (lt) 47km 129° 47 (63 / -33) i
89.40 I Radio Kiss Kiss Monte Cosce (ri) 57km 12° 43 (61 / -35)# i
89.40 I Radio Italia Anni 60 Roccasecca dei Volsci-Monte Curio (lt) 78km 128° 40 (59 / -38) i
89.50 I Radio Classica Monte Cavo (rm) 26km 131° 67 (68 / -28) i
89.70h I RAI Radiouno Roma/Monte Mario (RAI) (rm) 100 100 3km 304° 107 (107 / -10) i
89.80 I Radio Nettuno Anzio Anzio (rm) 52km 166° 41 (62 / -34) i
89.90 I Radio Rock Italia Monte Porzio Catone (rm) 21km 116° 70 (70 / -26) i
90.00 I Radio Maria Genzano (rm) 28km 143° 65 (68 / -29) i
90.10 I Radio Deejay Monte Cosce (ri) 57km 12° 53 (61 / -35) i
90.20 I Radio Deejay Campocatino (fr) 71km 96° 48 (59 / -37) i
90.30 I Radio Deejay Monte Cavo (rm) 26km 131° 67 (68 / -28) i
90.50 I m2o Rocca di Papa (rm) 25km 132° 68 (69 / -28) i
90.70 I Teleradiostereo 2 Rocca di Papa (rm) 5 25km 132° 74 (76 / -28)# i
90.70 I m2o Acilia (rm) 16km 217° 72 (72 / -24) i
90.80 I Radio 24 Monte Terminillo (ri) 76km 34° 46 (59 / -38) i
90.80 I Radio Verde Capranica-Vico Matrino (vt) 52km 325° 45 (62 / -34) i
90.90 I LifeGate Radio Monte Cavo (rm) 26km 131° 67 (68 / -28) i
91.00 I Simply Radio Tivoli (rm) 27km 78° 65 (68 / -29)# i
91.10 I RDS - Radio Dimensione Suono Velletri (rm) 29km 139° 63 (67 / -29) i
91.20h I RAI Radiodue Monte Cavo (RAI) (rm) 63 80 26km 131° 85 (86 / -28) i
91.40 I RTL 102.5 Tivoli/Monte Ripoli (rm) 27km 74° 66 (68 / -29) i
91.45 I Radio Lyra Caere Cerveteri (rm) 34km 289° 47 (66 / -31) i
91.50 I RTL 102.5 Roma/Monte Mario (rm) 3km 304° 87 (87 / -10) i
91.60 I Radio Rock Campagnano (rm) 29km 343° 64 (67 / -29) i
91.70h I RAI Radiodue Roma/Monte Mario (RAI) (rm) 100 100 3km 304° 107 (107 / -10) i
91.80v I Radio Maria Calvi dell’Umbria/Monte San Pancrazio (tr) 0.25 60km 9° 45 (55 / -35) i
91.90 I Radio Kiss Kiss Genzano-Vicolo Sant'Antonio (rm) 28km 143° 64 (68 / -29)# i
92.00 I R101 Palombara Sabina/Monte Gennaro (rm) 32km 55° 63 (66 / -30) i
92.10h I RAI Radiodue Monte Argentario (RAI) (gr) 14 70 122km 298° 41 (66 / -42) i
92.15 I RTL 102.5 Monte Cavo (rm) 26km 131° 67 (68 / -28) i
92.20 I RTL 102.5 Palombara Sabina/Monte Gennaro (rm) 32km 55° 63 (66 / -30) i
92.40v I RTL 102.5 Monte Cavo (rm) 15 26km 131° 79 (80 / -28) i
92.50h I RAI Radiouno Monte Terminillo (RAI) (ri) 0.35 0.9 76km 34° 41 (54 / -38) i
92.60 I Teleradiostereo Monte Guadagnolo (rm) 37km 87° 61 (65 / -31) i
92.70v I Teleradiostereo Rocca di Papa (rm) 18 25km 132° 80 (81 / -28) i
92.90 I Spazio Radio Roma-Casilina (rm) 0.1 1km 0° 86 (86 / 0) i
92.95 I Teleradiostereo Norma (lt) 53km 131° 43 (62 / -34) i
93.10 I Radio LatteMiele Rocca Priora (rm) 10 26km 115° 76 (78 / -28) i
93.20 I RAI Radiodue Filettino (RAI) (fr) 69km 91° 46 (60 / -37) i
93.30 CVA Radio Vaticana Europa-America Cittá del Vaticano (cva) 6 10 3km 270° 95 (95 / -10) i
93.40 I Radio Punto Zero Monte Soratte (rm) 39km 2° 58 (65 / -32) i
93.50 I Radio Mater Roma/Monte Mario (rm) 3km 304° 87 (87 / -10) i
93.70h I RAI Radiotre Roma/Monte Mario (RAI) (rm) 100 100 3km 304° 107 (107 / -10) i
93.80 I Tam Tam Network Roccasecca dei Volsci-Monte Curio (lt) 78km 128° 40 (59 / -38) i
93.90 I Radio Subasio Segni (rm) 50km 118° 45 (63 / -34) i
93.90h I RAI Radiouno Rocca Massima (RAI) (lt) 0.06 0.08 43km 124° 41 (52 / -33) i
94.00 I Radio Subasio Palombara Sabina/Monte Gennaro (rm) 32km 55° 63 (66 / -30) i
94.10v I Radio Subasio Monte Terminillo (ri) 5 76km 34° 53 (66 / -38) i
94.20 I Radio Subasio Più Monte Cavo (rm) 26km 131° 67 (68 / -28) i
94.30 I Radio Subasio Monte Soratte (rm) 39km 2° 58 (65 / -32) i
94.40h I RAI Radiodue Monte Terminillo (RAI) (ri) 0.9 76km 34° 45 (58 / -38) i
94.50v I Radio Subasio Monte Cavo (rm) 18 26km 131° 80 (81 / -28) i
94.70 I Radio Subasio Velletri/Contrada Tevola (rm) 29km 139° 63 (67 / -29) i
94.80v I Radio Maria Monte Cavo (rm) 5 26km 131° 74 (75 / -28) i
94.90h I RAI Radiouno Sezze (RAI) (lt) 0.5 0.8 67km 132° 43 (57 / -36) i
95.10 I Radio Maria Montecompatri (rm) 0.25 24km 118° 62 (63 / -28) i
95.20 I Radio Capital Caprarola-Poggio Nibbio (vt) 58km 333° 51 (61 / -35) i
95.20 I Radio 105 Network Velletri/Contrada Fiume (rm) 35km 134° 47 (66 / -31) i
95.30 I Radio Dimensione Musica Frascati-Villa Tuscolana (rm) 20km 124° 70 (70 / -26) i
95.30 I Radio Maria Albano Laziale/Monte Savello (rm) 24km 141° 68 (69 / -28) i
95.50 I Radio Capital Montecompatri (rm) 24km 118° 68 (69 / -28) i
95.70 I Radio Capital Velletri/Contrada Tevola (rm) 29km 139° 63 (67 / -29) i
95.70h I RAI Radiouno Monte Peglia (RAI) (tr) 60 104km 348° 55 (74 / -40) i
95.80 I Radio Capital Monte Soratte (rm) 39km 2° 58 (65 / -32) i
95.90 I RAI Radiotre Filettino (RAI) (fr) 69km 91° 46 (60 / -37) i
96.00 I Radio Centro Suono Sport Cori (lt) 47km 129° 54 (63 / -33) i
96.00 I Radio 105 Network Monte Calcarone (ri) 73km 30° 47 (59 / -37) i
96.00 I Radio Radio Segni (rm) 50km 118° 45 (63 / -34) i
96.10 I Radio 105 Network Monte Cavo (rm) 26km 131° 67 (68 / -28) i
96.20 I RDS - Radio Dimensione Suono Subiaco/Località San Biagio (rm) 53km 88° 51 (62 / -34) i
96.20 I Radio Enea Velletri/Contrada Fiume (rm) 35km 134° 47 (66 / -31) i
96.20h I RAI Radiodue Rocca Massima (RAI) (lt) 0.06 0.08 43km 124° 41 (52 / -33) i
96.30 CVA Radio inBlu Cittá del Vaticano (cva) 6 10 3km 270° 95 (95 / -10) i
96.40 I Radio Deejay Leofreni (ri) 67km 53° 47 (60 / -36) i
96.50 I Radio 105 Network Roma/Monte Mario (rm) 3km 304° 87 (87 / -10) i
96.60 I Radio L'Olgiata Roma-Olgiata (rm) 18km 327° 71 (71 / -25) i
96.65 I Radio Gioia Paradise Amica Roma-Via Magliano in Sabina (rm) 4km 32° 84 (84 / -12)# i
96.70 I Soloradio Segni (rm) 50km 118° 45 (63 / -34) i
96.70h I RAI Radiodue Sezze (RAI) (lt) 0.5 0.8 67km 132° 43 (57 / -36) i
96.70 I RTL 102.5 Guadamello-Località Sasso Freddo (tr) 61km 356° 42 (61 / -36)# i
96.70 I RTL 102.5 Caprarola-Poggio Nibbio (vt) 58km 333° 42 (61 / -35)# i
96.80 I Radio Incontro Italia Monte Cavo (rm) 26km 131° 67 (68 / -28) i
96.90 I RTL 102.5 Albano Laziale/Monte Savello (rm) 24km 141° 68 (69 / -28) i
97.00 I m2o Montecompatri (rm) 24km 118° 68 (69 / -28) i
97.10 I Onda Libera Segni (rm) 49km 117° 53 (63 / -34) i
97.10 I Radio Kiss Kiss Monte Terminillo (ri) 76km 34° 46 (59 / -38) i
97.20v I Radio Kiss Kiss Montecompatri (rm) 10 24km 118° 78 (79 / -28) i
97.30 I Radio Globo Viterbo (vt) 65km 332° 49 (60 / -36) i
97.30 I Centro Mare Radio Cervèteri/San Martino (rm) 34km 289° 47 (66 / -31) i
97.30 I Radio Antenne Erreci Velletri (rm) 35km 134° 47 (66 / -31) i
97.30h I RAI Radiodue Campocatino (RAI) (fr) 0.43 0.85 71km 96° 45 (56 / -37) i
97.40 I Radio Galileo Calvi dell’Umbria/Monte San Pancrazio (tr) 60km 9° 51 (61 / -35) i
97.50 I Radio Meridiano 12 Frascati-Villa Tuscolana (rm) 20km 124° 70 (70 / -26) i
97.50 I Radio Capital Montecompatri / puntato a sud (rm) 24km 118° 68 (69 / -28) i
97.50 I Radio Canale Zero Genzano (rm) 28km 143° 65 (68 / -29) i
97.70 I Radio Città Futura Monte Cavo (rm) 26km 131° 67 (68 / -28) i
97.80 I Radio Città Futura Subiaco/Località San Biagio (rm) 53km 88° 51 (62 / -34) i
97.80 I Radio Maria Monte Terminillo (ri) 1 76km 34° 46 (59 / -38) i
97.90 I Radio Kiss Kiss Frascati-Villa Tuscolana (rm) 20km 124° 70 (70 / -26) i
98.10 I Radio Sei - La Talk Radio Monte Cavo (rm) 26km 131° 67 (68 / -28) i
98.40h I RAI Radiotre Monte Cavo (RAI) (rm) 63 80 26km 131° 85 (86 / -28) i
98.50 I Radio Stranamore Monte Terminillo (ri) 76km 34° 46 (59 / -38) i
98.55 I Virgin Radio Campocatino (fr) 71km 96° 48 (59 / -37) i
98.55 I RAI GR Parlamento Lariano (rm) 35km 125° 47 (66 / -31) i
98.60 I Radio Capital Guadamello-Località Sasso Freddo (tr) 61km 356° 45 (61 / -36) i
98.60 I Radio Maria Arsoli-Colle di Tora (rm) 0.25 48km 72° 45 (57 / -34) i
98.70 I Virgin Radio Frascati-Villa Tuscolana (rm) 20km 124° 70 (70 / -26) i
98.80 I Radio Suby Monte Calcarone (ri) 73km 30° 47 (59 / -37) i
98.85v I Tele Radio Orte Guadamello-Località Sasso Freddo (tr) 0.5 61km 356° 42 (58 / -36) i
98.90h I RAI Radiotre Rocca Massima (RAI) (lt) 0.06 0.08 43km 124° 41 (52 / -33) i
99.00 I Radio Ti Ricordi Rocca di Papa (rm) 25km 132° 68 (69 / -28) i
99.00 I Onda Libera Palestrina (rm) 34km 102° 61 (66 / -31) i
99.10 I Radio Azzurra Italia Network Settecamini (rm) 12km 71° 75 (75 / -22) i
99.20 I Radio Donna Italy Tivoli (rm) 27km 78° 66 (68 / -29) i
99.30v I RAI GR Parlamento Monte Cavo (RAI) (rm) 50 26km 131° 84 (85 / -28) i
99.40 I RAI GR Parlamento Caprarola-Poggio Nibbio (vt) 12 58km 333° 62 (72 / -35) i
99.50 I RTL 102.5 Monte Cosce (ri) 57km 12° 53 (61 / -35) i
99.50v I Radio Radio Monte Calcarone (ri) 1 73km 30° 47 (59 / -37) i
99.50h I RAI Radiotre Campocatino (RAI) (fr) 0.43 0.85 71km 96° 45 (56 / -37) i
99.60 I Radio Globo Monte Cavo (rm) 26km 131° 67 (68 / -28) i
99.60 I RDS - Radio Dimensione Suono Tivoli/Colle Arcese (rm) 27km 78° 66 (68 / -29) i
99.70h I RAI Radiotre Monte Peglia (RAI) (tr) 60 104km 348° 55 (74 / -40) i
99.70 I Nuova Rete Segni (rm) 49km 117° 53 (63 / -34) i
99.70 I Radio Subasio Subiaco/Località San Biagio (rm) 53km 88° 46 (62 / -34)# i
99.80 I Radio Cuore Rocca di Papa (rm) 25km 132° 68 (69 / -28) i

 

[SUPERCASTER]

Rome part 2 Above 99.9mHz

100.00 I R101 Monte Cavo (rm) 26km 131° 67 (68 / -28) i
100.20 I Radio Suby Campagnano (rm) 29km 343° 62 (67 / -29) i
100.30h I RAI Auditorium Roma/Monte Mario (RAI) (rm) 100 100 3km 304° 107 (107 / -10) i
100.45 I Dimensione Suono Roma Roccasecca dei Volsci-Monte Curio (lt) 78km 128° 40 (59 / -38) i
100.50 I Voxson Vintage Radio Roma/Monte Mario (rm) 3km 304° 87 (87 / -10) i
100.60 I Radio Galileo Caprarola-Poggio Nibbio (vt) 58km 333° 51 (61 / -35) i
100.70 I Voxson Vintage Radio Monte Cavo (rm) 26km 131° 67 (68 / -28) i
100.70 I m2o Velletri/Contrada Tevola (rm) 29km 139° 63 (67 / -29) i
100.80 I Radio Maria Guadamello (tr) 61km 356° 42 (61 / -36)# i
101.00 I Radio Deejay Montecompatri (rm) 15 24km 118° 80 (81 / -28) i
101.10 I Radio Deejay Guadamello (tr) 61km 356° 45 (61 / -36) i
101.20 I Radio Cuore Segni (rm) 49km 117° 53 (63 / -34) i
101.20 I Radio 105 Network Caprarola-Poggio Nibbio (vt) 58km 333° 51 (61 / -35) i
101.20 I Radio Centro Suono Sport Campocatino (fr) 71km 96° 48 (59 / -37) i
101.30 I Radio Centro Suono Monte Cavo (rm) 26km 131° 67 (68 / -28) i
101.50 I Radio Centro Suono Sport Monte Cavo (rm) 26km 131° 67 (68 / -28) i
101.60 I Dimensione Suono Roma Caprarola-Poggio Nibbio (vt) 58km 333° 51 (61 / -35) i
101.70 I m2o Monte Calcarone (ri) 73km 30° 47 (59 / -37) i
101.70 I Radio 24 Roccasecca dei Volsci-Monte Curio (lt) 78km 128° 40 (59 / -38) i
101.80 I Radio Centro Fiuggi Fiuggi (fr) 69km 105° 45 (60 / -37) i
101.90 I Dimensione Suono Roma Monte Cavo (rm) 15 15 26km 131° 79 (80 / -28) i
102.00 I RTL 102.5 Caprarola-Poggio Nibbio (vt) 5 58km 333° 58 (68 / -35) i
102.00 I Radio Centro Suono Sport Subiaco/Località San Biagio (rm) 53km 88° 51 (62 / -34) i
102.00 I Radio 105 Network Campocatino (fr) 71km 96° 48 (59 / -37) i
102.10V I RTL 102.5 Rocca di Papa (rm) 20 20 25km 132° 81 (82 / -28) i
102.20 I Radio Omega Sound Anzio-Via Antonio Gramsci (rm) 51km 165° 47 (62 / -34)# i
102.30 I RTL 102.5 Campagnano-Monte Razzano (rm) 27km 342° 66 (68 / -29) i
102.30 I RTL 102.5 Velletri/Contrada Tevola (rm) 29km 139° 63 (67 / -29) i
102.30 I TRS The Radio Station Palombara Sabina/Monte Gennaro (rm) 32km 55° 63 (66 / -30) i
102.40v I Radio Radicale Roma/Monte Mario (rm) 10 3km 304° 97 (97 / -10) i
102.50 I RTL 102.5 Ponte Galeria-Fiumicino (rm) 5 26km 240° 72 (75 / -28) i
102.60 I RTL 102.5 Latina-Grattacielo (lt) 59km 144° 42 (61 / -35)# i
102.60 I RDS - Radio Dimensione Suono Pescorocchiano-Leofreni (ri) 63km 58° 41 (61 / -36)# i
102.70 I RAM Power Montecompatri (rm) 24km 118° 68 (69 / -28) i
102.80 I RDS - Radio Dimensione Suono Monte Cosce (ri) 57km 12° 53 (61 / -35) i
102.80 I RTL 102.5 Norma (lt) 5 53km 131° 50 (69 / -34) i
103.00 I RDS - Radio Dimensione Suono Monte Cavo (rm) 26km 131° 67 (68 / -28) i
103.30 I Radio Popolare Roma Frascati/via Santa Croce (rm) 19km 117° 71 (71 / -25) i
103.30 I Radio Delta Velletri Stereo Velletri (rm) 29km 139° 63 (67 / -29) i
103.45 I RAI Isoradio Monte Cavo (RAI) (rm) 26km 131° 67 (68 / -28) i
103.50 I RAI Isoradio (prove tecniche) Rocca di Papa (rm) 25km 132° 67 (69 / -28)# i
103.60 I Dimensione Suono Roma Segni (rm) 49km 117° 53 (63 / -34) i
103.70 I Radio Programma Italia Vermicino (rm) 16km 123° 72 (72 / -24) i
103.70 I Simply Radio Tivoli (rm) 27km 78° 66 (68 / -29) i
103.80 CVA Radio Vaticana Africa-Asia Cittá del Vaticano (cva) 6 10 3km 270° 95 (95 / -10) i
103.90 I Radio Roma Palombara Sabina/Monte Gennaro (rm) 32km 55° 63 (66 / -30) i
104.00 I RAI Radiodue Terminillo C.S. (RAI) (ri) 76km 34° 46 (59 / -38) i
104.00 I R101 Norma (lt) 53km 131° 43 (62 / -34) i
104.10 I Virgin Radio San Venanzo-Località San Vito (tr) 67km 2° 40 (60 / -36) i
104.20 I Radio Italia Solo Musica Italiana Montecompatri (rm) 24km 118° 68 (69 / -28) i
104.40 I Tele Radio Hernica Fiuggi-Località Campitelli (fr) 62km 100° 44 (61 / -36) i
104.50 I Radio Radio Palombara Sabina/Monte Gennaro (rm) 32km 55° 63 (66 / -30) i
104.70 I RDS - Radio Dimensione Suono Caprarola-Poggio Nibbio (vt) 58km 333° 51 (61 / -35) i
104.80 I Radio Voce della Speranza Monte Cavo (rm) 26km 131° 67 (68 / -28) i
104.90 I Radio Radicale Campocatino (fr) 71km 96° 48 (59 / -37) i
105.00 CVA Radio Vaticana 105 Live Cittá del Vaticano (cva) 10 15 3km 270° 97 (97 / -10) i
105.10 I RDS - Radio Dimensione Suono Poli (rm) 35km 93° 62 (66 / -31) i
105.10 I RDS - Radio Dimensione Suono Guadagnolo/Santuario Mentorella (rm) 38km 86° 58 (65 / -32) i
105.20 I RDS - Radio Dimensione Suono Monte Porzio Catone (rm) 21km 116° 70 (70 / -26)# i
105.30 I Dimensione Suono Due Monte Cavo (rm) 26km 131° 67 (68 / -28) i
105.50 I Radio Subasio Monte Scalambra (fr) 52km 92° 54 (62 / -34) i
105.50 I RTL 102.5 Monte San Giovanni in Sabina-Località Pratarella (ri) 54km 27° 45 (62 / -35)# i
105.60 I Rete Sport Rocca di Papa (rm) 25km 132° 68 (69 / -28) i
105.80 I Radio Incontro Monte Cavo (rm) 26km 131° 67 (68 / -28) i
106.00 I Radio Faro-Web Italia Subiaco/Località San Biagio (rm) 53km 88° 46 (62 / -34)# i
106.00 I RTL 102.5 Varco Sabino (ri) 62km 42° 41 (61 / -36)# i
106.05 I Studio 93 Cori (lt) 47km 129° 54 (63 / -33) i
106.10 I RMC 2 - Radio Monte Carlo 2 Frascati-Villa Tuscolana (rm) 20km 124° 70 (70 / -26) i
106.30 I RMC - Radio Monte Carlo Monte Cavo (rm) 26km 131° 67 (68 / -28) i
106.40 I Radio Maria Campocatino (fr) 1 71km 96° 48 (59 / -37) i
106.40 I Radio Maria Anzio (rm) 52km 166° 41 (62 / -34) i
106.50 I Radio Maria Calvi dell’Umbria/Monte San Pancrazio (tr) 1 60km 9° 51 (61 / -35) i
106.60 I Radio Rock Monte Cavo (rm) 26km 131° 67 (68 / -28) i
106.60 I Radio Maria Velletri-Monte Artemesio (rm) 29km 139° 63 (67 / -29)# i
106.70 I RMC - Radio Monte Carlo Calvi dell’Umbria/Monte San Pancrazio (tr) 60km 9° 51 (61 / -35) i
106.70v I RMC - Radio Monte Carlo Monte Amiata (si) 100 130km 328° 47 (74 / -42) i
106.90 I Radio Mambo Monte Cavo (rm) 26km 131° 67 (68 / -28) i
107.00 I Radio Radio San Vito Romano (rm) 41km 92° 51 (64 / -32) i
107.10 I Antenna Uno Monte Cavo (rm) 26km 131° 67 (68 / -28) i
107.30 I Radio Subasio Campocatino (fr) 71km 96° 48 (59 / -37) i
107.40 I Radio Suby Palombara Sabina/Monte Gennaro (rm) 1 32km 55° 63 (66 / -30) i
107.50 I Radio Evangelo Segni (rm) 50km 118° 45 (63 / -34) i
107.50 I Radio Evangelo Monte Scalambra (fr) 52km 92° 43 (62 / -34) i
107.68 I Radio R 2 Montecompatri (rm) 24km 118° 68 (69 / -28) i
107.70 I Radio Radicale Poggi d'Oro (rm) 32km 145° 52 (66 / -30) i
107.70 I Radio Radicale Caprarola-Poggio Nibbio (vt) 58km 333° 51 (61 / -35) i
107.70 I Radio Radicale Monte Terminillo (ri) 76km 34° 46 (59 / -38) i
107.90 I Radio 24 Monte Cavo (rm) 26km 131° 67 (68 / -28) i

 

[R.F. Burns]

How many time share stations are they running? Some frequencies list 3 or more stations. That said, good thing we don't live in Rome. You want analog FM, move to Rome.

 

[Chuck]

How many time share stations are they running? Some frequencies list 3 or more stations. That said, good thing we don't live in Rome. You want analog FM, move to Rome.

I'm sure that quite a few of those stations simulcast each other. From that list, it appears there must be some such time share arrangements as well. The last time I was in Europe, I’d swear they were all on at the same time. There sure were a lot of them.

I was going to answer your question about what cities this happens in, but Supercaster has done a pretty good job of a starter list. What's worse is that doesn't even count the pirate stations which are rampant.

Italy even has pirate TV that runs porno movies... But that is another discussion.

 

[Tom Wells]

Italy was indeed crazy-full of FM signals. The last time I was there in 1993, working in Casale Monferrato, which is between Milan and Turin, the dial was more full than it could stand. I could listen to a signal in the car sitting still, but put the car in motion and it was
really more or less impossible to keep one selected station tuned in. Any one frequency really DID have 2 or three stations on it,
and it was a continuous game of paper/rock/scissors between them.

The Italian government decided that government had no business in regulating radio, and abolished their version of the FCC.
If you want to be heard, make more signal, that's their stance on the issue.

Not that I think it would work here. It wasn't working very well there. Maybe it's not so bad in the big cities.
I can't say I remember just how bad it was in Milan proper.

 

[Chuck]

Italy was indeed crazy-full of FM signals. The last time I was there in 1993, working in Casale Monferrato, which is between Milan and Turin, the dial was more full than it could stand. I could listen to a signal in the car sitting still, but put the car in motion and it was
really more or less impossible to keep one selected station tuned in. Any one frequency really DID have 2 or three stations on it,
and it was a continuous game of paper/rock/scissors between them.

The Italian government decided that government had no business in regulating radio, and abolished their version of the FCC.
If you want to be heard, make more signal, that's their stance on the issue.

Not that I think it would work here. It wasn't working very well there. Maybe it's not so bad in the big cities.
I can't say I remember just how bad it was in Milan proper.

Well, I wasn't advocating the Italian form of radio anarchy. What they have is nuts. HD certainly won't work under those conditions. It was just a comment that if everyone was required to simultaneously change their pre-emphasis curve to the European standard of 50 us, the most FM stations could be made to sound a lot better. It would cost nothing to do other than a few minutes time.