Good evening, everyone! The "wandering one" has returned! :*)
Here in the Murray area recently, I've been picking up a new channel in the OPPD frequency layout.
The frequency in question is 859.28750 and is up nearly constantly. Most of the time, it sounds as if it's transmitting APCO25 "idle" codes - codes that are sent when no actual data is being sent.
Then, infrequently, you hear bursts of sounds that are irregular and interrupt the rhythmic sound of the "idle" codes. Sometimes, the irregular sounds are quite lengthy, other times, just temporary.
My BCD396T recognizes the signalling as P25, but only displays "LNK", indicating "data on a voice channel". The UniTrunker "knack.exe" program tells me that the NAC is 140, which is what ORIN/OPPD is using.
Other frequencies with this same behavior include 858.2875 and 858.4875, however they are not as strong as the first one I mentioned.
Is it possible that OPPD is using this channel for Mobile Data in the APCO25 format?
I thank you for your observations!
73's
Here in the Murray area recently, I've been picking up a new channel in the OPPD frequency layout.
The frequency in question is 859.28750 and is up nearly constantly. Most of the time, it sounds as if it's transmitting APCO25 "idle" codes - codes that are sent when no actual data is being sent.
Then, infrequently, you hear bursts of sounds that are irregular and interrupt the rhythmic sound of the "idle" codes. Sometimes, the irregular sounds are quite lengthy, other times, just temporary.
My BCD396T recognizes the signalling as P25, but only displays "LNK", indicating "data on a voice channel". The UniTrunker "knack.exe" program tells me that the NAC is 140, which is what ORIN/OPPD is using.
Other frequencies with this same behavior include 858.2875 and 858.4875, however they are not as strong as the first one I mentioned.
Is it possible that OPPD is using this channel for Mobile Data in the APCO25 format?
I thank you for your observations!
73's