MSCommNet Thread II

[schwab]

I received transmissions on an 800 MHz mobile repeater from a State Police cruiser today in South Berwick. 851.6875 was transmitting a P25 control channel showing a system ID on my BCD396XT of 0077h. It didn't show a site ID. I actually swapped that freq into my scanner as a CC and received Zone 1A traffic on it. It didn't change to another frequency when there was voice traffic like a regular trunking site, everything was on 851.6875. The mobile repeater had a range of a little less than one mile.

[schwab]

TG 672 is being transmitted on the Mt Aggie site (43), all encrypted. Radio IDs are in the MSP mobile radio range (1101xxx).

[KD1SQ]

I'm up near Madawaska. I was putting the RSP1A through its paces and spotted that 151.2650 is carrying a simultaneous analog feed of what's going out on the Madawaska MSCOMMNET P25 voice channel. As I watched, I saw the analog channel exactly mirror the activity on the P25 channel.

Did a little searching, can't find any mention anywhere of .2650 being used as an analog outlet for this purpose.

Can anyone shed any light on this or is it a new one?

Lee

[schwab]

No. 9 Mountain Region Net. It is listed in the Wiki.

[KD1SQ]

Thanks, I did search but it can't have been in the right place, I'd guess.

Was out of the area for a couple of years but now I'm back and working on refamiliarizing myself with what's on the air.

[ecps92]

You can always search the wiki for the actual frequency
see the Search of http://www.scan-ne.net/wiki/index.php?t ... 2650&go=Go

However, always use out to 4 decimal points, unless part of newer narrow band where they use 5 digits [700 mhz is an example]

Thanks, I did search but it can't have been in the right place, I'd guess.

Was out of the area for a couple of years but now I'm back and working on refamiliarizing myself with what's on the air.

[W1MTW]

171.3175 has been switched as a control channel to the Spuce Mountain site.

[ecps92]

Did you mean 171.3125 ?
3175 would not be valid at 12.5 khz splits.

Did it Replace an existing Channel, or is this a new Add-On ?

171.3175 has been switched as a control channel to the Spuce Mountain site.

[W1MTW]

Did you mean 171.3125 ?

Yes, that's what I meant. I noticed voice coming over 171.975, which has been listed as CC only. So, with that, I'm thinking that 171.975 is now a voice channel only.

[schwab]

From what I understand, on a Harris P25 system any frequency at a site can be in the CC rotation.

[ecps92]

My Understanding as well.
I think the original concept of tracking the Control, Alternates and Voice channels may [for this system] need to be revisited or continue with edits

BTW, seems they added TWO NTIA channels to Spruce
http://wireless2.fcc.gov/UlsApp/UlsSear ... =&x=14&y=6

From what I understand, on a Harris P25 system any frequency at a site can be in the CC rotation.

[W1MTW]

My Understanding as well.
I think the original concept of tracking the Control, Alternates and Voice channels may [for this system] need to be revisited or continue with edits

With that thought in mind, Whitten Hill site #83 in Zone 2, 160.800 is also used as a control channel.