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KAZT Off Air

ihEARDtHAT

ihEARDtHAT

Just noticed that KAZT TV7 is off the air. There is a notice on the screen that reads:
KAZT tv7
due to forest fire
this channel
will be off the air
until further notice
Thank you for your patience.
 
That's the fine ::) font notice as seen on cable 13. It's probably put up
by the stupid cable company (they would like for me to use their name).

If you check OTA, you'll find no signal from 7.1/7.2/7.3 (RF-whatever).

KAZT has been down since before 10 PM Thursday night. Bummer that
we missed the last episode of Perry Mason from Me-TV last night.
 
ihEARDtHAT said:
Just noticed that KAZT TV7 is off the air. There is a notice on the screen that reads:
KAZT tv7
due to forest fire
this channel
will be off the air
until further notice
Thank you for your patience.
Click to expand...

There's no STL between the Londen Building and South Mountain? KAZT-CD is a Class A station, not a translator. I thought they could originate programming directly from Phoenix even though the path to Prescott is blocked due to the fire.
 
KeithE4 said:
ihEARDtHAT said:
Just noticed that KAZT TV7 is off the air. There is a notice on the screen that reads:
KAZT tv7
due to forest fire
this channel
will be off the air
until further notice
Thank you for your patience.
Click to expand...

There's no STL between the Londen Building and South Mountain? KAZT-CD is a Class A station, not a translator. I thought they could originate programming directly from Phoenix even though the path to Prescott is blocked due to the fire.
Click to expand...

Live programming, yes, but unless something's changed in the four years I've been gone, Master Control and all the playback facilities for recorded programming (including commercials) are in Prescott.
 
I wonder if Prescott and Verde Valley lost the main RF channel 7 signal? The fire is in the Bradshaw Mountains, but KAZT's transmitter is on Mingus Mountain, and should not have been affected by the fire. Does KAZT use a relay on Towers Mountain (where the fire is) or was it that the smoke interfered with the signal between Prescott and Phoenix? (KECY used to have a similar problem with sand in the air from the Glamis Dunes, which is why they relocated studios from El Centro to Yuma 10 years ago.)

There was no notice on the screen with the OTA signal; just a null packet. And no PSIP, so I had to tune to channels 36.3, 36.4 and 36.5 instead.
 
dhett said:
...And no PSIP, so I had to tune to channels 36.3, 36.4 and 36.5 instead.
Click to expand...

My PSIP 7.1/7.2/7.3 came back up with no rescanning needed for the DTV converter.

Are you saying that the 36.3/.4/.5 are the actual RF 7.1/.2/.3? Is there a 36.1 or 36.2?
 
dhett said:
I wonder if Prescott and Verde Valley lost the main RF channel 7 signal? The fire is in the Bradshaw Mountains, but KAZT's transmitter is on Mingus Mountain, and should not have been affected by the fire. Does KAZT use a relay on Towers Mountain (where the fire is) or was it that the smoke interfered with the signal between Prescott and Phoenix? (KECY used to have a similar problem with sand in the air from the Glamis Dunes, which is why they relocated studios from El Centro to Yuma 10 years ago.)
Click to expand...

I seem to remember there is a private statewide microwave network that was started years ago to help Phoenix stations get their signal up to the translators in Northern Arizona. A straight shot from the main station to a distant translator would be difficult or maybe impossible due to the terrain and other factors. Today, with advanced Internet and satellite technologies, there are other ways to bring the signal from "point A" to "point B" in HDTV quality without using a system with many "hops."
 
Eric Stein said:
dhett said:
I wonder if Prescott and Verde Valley lost the main RF channel 7 signal? The fire is in the Bradshaw Mountains, but KAZT's transmitter is on Mingus Mountain, and should not have been affected by the fire. Does KAZT use a relay on Towers Mountain (where the fire is) or was it that the smoke interfered with the signal between Prescott and Phoenix? (KECY used to have a similar problem with sand in the air from the Glamis Dunes, which is why they relocated studios from El Centro to Yuma 10 years ago.)
Click to expand...

I seem to remember there is a private statewide microwave network that was started years ago to help Phoenix stations get their signal up to the translators in Northern Arizona. A straight shot from the main station to a distant translator would be difficult or maybe impossible due to the terrain and other factors. Today, with advanced Internet and satellite technologies, there are other ways to bring the signal from "point A" to "point B" in HDTV quality without using a system with many "hops."
Click to expand...

And yet KPHO just got permission to up the ERP on K40AD Cottonwood to 12.6 kW digital so they can feed Prescott and Flagstaff from there. I'm sure there has to be some sort of microwave network, as the Kingman translators on Hualapai Mtn. are fed directly from Phoenix, then feed the other Mohave County stations.
 
oldiesfan6479 said:
dhett said:
...And no PSIP, so I had to tune to channels 36.3, 36.4 and 36.5 instead.
Click to expand...

My PSIP 7.1/7.2/7.3 came back up with no rescanning needed for the DTV converter.

Are you saying that the 36.3/.4/.5 are the actual RF 7.1/.2/.3? Is there a 36.1 or 36.2?
Click to expand...

That's correct. Most stations, but not all, use Program 3, or PID 0x0030, in the Program Map Table (PMT) for the main subchannel, which PSIP sends out as .1, then Program 4/0x0040 (.2), Program 5/0x0050 (.3), etc. 0x0030 is a hexidecimal value (hence the 0x prefix) and translates to the number 48 in decimal. There was a reason that PIDs 0x0010 and 0x0020 have not generally been used, but I don't remember what that was. Trip, Scott Fybush, w9wi, or other broadcast engineering types might have the answer to that, but I know the practice, while widespread, is not universal.

There is no 36.1 or 36.2. Check out the station's info at RabbitEars. Also, here is the transport stream reading for KAZT-CD that I supplied to RabbitEars.
 
To be really, really pedantic about it, it's not even quite correct to say "36.3" or "36.4" when describing the physical "channel." There's nothing in the ATSC standard that compels a tuner to display "PID 0x0030" on RF channel 36 as "36.3," though some tuners will do so.

It's all meant to be "under the hood," as it were - the whole purpose of PSIP is to provide a friendlier front end to consumers while allowing broadcasters some flexibility behind the scenes to configure (and reconfigure) their transport streams as needed. It's only when PSIP fails (which is rare!) that knowledgeable viewers can use tricks like tuning to "36.3" (on tuners that can do that) to dial in the transport stream directly.
 
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