KKXA Listening Reports

[xmtrland]

The buffer on AM HD is enough to cover a typical pattern change a second or two. Any thing longer and audio drops and you have to re sync to get audio going again. The 8 second delay on AM/FM HD is in the importer/exporter. Not in the receiver. The buffer on the receive end is very big.

 

[semoochie]

The buffer on AM HD is enough to cover a typical pattern change a second or two. Any thing longer and audio drops and you have to re sync to get audio going again. The 8 second delay on AM/FM HD is in the importer/exporter. Not in the receiver. The buffer on the receive end is very big.

A buffer is an integral part of the IBOC system. It's supposed to be enough to outlast lightning strikes or short tunnels. I didn't realize it was that short a duration.

 

[xmtrland]

Meant to say that the buffer on the receive end is not very big.

 

[Kelly A]

A buffer is an integral part of the IBOC system. It's supposed to be enough to outlast lightning strikes or short tunnels. I didn't realize it was that short a duration.

Oh you're talking about the cache in the receiver chip. For very short losses of packets, sure. (maybe a second) With so little bandwidth on AM for extra replacement packets, there isn't enough BER to hold in a cache to make up for very many missing packets. Pull up next to a hybrid electric Metro bus at an intersection, or get stopped in traffic under an overpass for more than a second or two, and data just stops.

 

[Andrew Skotdal]

So, can the night pattern be let out a little with KQRR gone?
(Daytime non-directional now.)
KOKC's 0.5 mV/m is being pulled in a little with shorter towers.
Adjacent channel KGA is no longer a Class A.
KFBK still there.

Direct from Stephen Lockwood’s partner in crime, Tom Gorton, because we asked about our restriction of going directional two hours pre sunset and post sunrise vs. operating omni-directional in those hours at 20,000 Watts vs. 50,000 Watts all other times:

The critical hours restriction is due to Oklahoma City. Only Class A stations get critical hours protection.
Your nighttime limits, listed in order of how close your current pattern is to the limit and with Oregon City removed are:

Calgary [which doesn’t exist but is protected by treaty]
OKC
Spokane
Sacramento

 

[Andrew Skotdal]

KRKO is quite listenable here 1500 miles away .... better then KKXA.... well before KQRR went away

Thanks for listening! Funny you know we have both. You’re paying attention.

 

[bobdavcav]

KRKO is definitely the stronger of the two, but KKXA was in with a weak signal tonight as well. There was something underneath, but couldn't make it out. Also, I had wondered where Hidy May was, was good to hear her voice again.