No audio with Type 2 Trunk on Grecom PS-600

[tvengr]

Glad to hear it's working. Please let me know if you have any other questions.

 

[Car150]

Glad to hear it's working. Please let me know if you have any other questions.

Ha you are not going to believe this. One of the FD's in that group of 6 that I monitor...had a call this morning...which I heard loud and clear , both on their own talk group and the regional fire dispatch talk group. They are called "Elgin" . Just as they were finishing up.... i heard another conversation of an unfolding of a mva ... which was showing in the "Elgin" ID talkgroup, but the geographical area they were talking about was about 80 km east of them. As the call unfolded, I suddenly realized it was the "Port Elgin" Fire Department. Radio traffic carried on for about an hour. I double and triple checked the 5 digit talk group code (I do not have the Port Elgin talkgroup in the device at all). I am aware that the P25 trunk system utilizes the same frequencies in various geographical areas BUT how could it be I am listening to another distinct fire department...80 km away without their talk group ID in the device ????? That is a strange one.

 

[tvengr]

It is possible that somewhere in the system that the Elgin and Port Elgin talkgroups were patched together. Depending how the system is setup, units may be able to communicate with each other. Did you hear any comments about Elgin hearing Port Elgin?

 

[Car150]

It is possible that somewhere in the system that the Elgin and Port Elgin talkgroups were patched together. Depending how the system is setup, units may be able to communicate with each other. Did you hear any comments about Elgin hearing Port Elgin?

No....totally independent talk groups....even spoke to the fire chief in Elgin...they were not hearing what I was hearing. The other strange thing is the GRECOM is flashing all groups (1-10) as well as all subgroups (1-10) although the only scan lists are #1 and #2. ??? Strange. Each fire department has their own talk group....and then there are 4 regional dispatch groups. strange. (or most bizzare). These two locations are over 60 miles apart.

 

[tvengr]

If you can attach your updated file, I will take a look at it. Check that is has the reduced number of frequencies. If you go to Global Settings in ARC500 and click on the ScanLists tab, you can uncheck scan lists not being used. Click on Apply and save the file.

 

[tvengr]

Although it is not as common, tropospheric ducting can occur with 700 MHz frequencies. You could very well be picking up another control channel that is normally out of range. Your PSR-600 does not use site NAC. That would block the commercial radios from receiving the alien control channel and they would not receive the transmissions. However, the offending signals can still interfere with and degrade the operation of the radio system.

 

[Car150]

It is possible that somewhere in the system that the Elgin and Port Elgin talkgroups were patched together. Depending how the system is setup, units may be able to communicate with each other. Did you hear any comments about Elgin hearing Port Elgin?

It is possible that somewhere in the system that the Elgin and Port Elgin talkgroups were patched together. Depending how the system is setup, units may be able to communicate with each other. Did you hear any comments about Elgin hearing Port Elgin?

Although it is not as common, tropospheric ducting can occur with 700 MHz frequencies. You could very well be picking up another control channel that is normally out of range. Your PSR-600 does not use site NAC. That would block the commercial radios from receiving the alien control channel and they would not receive the transmissions. However, the offending signals can still interfere with and degrade the operation of the radio system.

It does appear to be working ok...other than those channel (0-10) and subgroups (0-10) flashing on the screen....but traffic coming through on trunk and conventional.

 

[tvengr]

other than those channel (0-10) and subgroups (0-10) flashing on the screen

They are referred to as scan lists #1 thru #20. If you go to Global Settings and the ScanLists tab., you can remove the check marks from scan lists 3 thru 20 to remove the numbers from the screen. Also pressing the numbers on the keypad will turn them off. For scan lists 11 thru 20, press FUNC first and then 1 thru 0.

 

[Car150]

They are referred to as scan lists #1 thru #20. If you go to Global Settings and the ScanLists tab., you can remove the check marks from scan lists 3 thru 20 to remove the numbers from the screen. Also pressing the numbers on the keypad will turn them off. For scan lists 11 thru 20, press FUNC first and then 1 thru 0.

Thank you tvengr....I think we are good. A bunch of traffic on both TMR (trunk) and conventional tonight...with 3 different departments. All seemed to work ok. that wee glitch with one of the conventional channels flashing in what appears priority mode..is just that..a wee glitch and not a problem Thank you for your patience and advice. Doug (current Grecom 600 database attached)

 

[tvengr]

You should enter both of the red control channel capable frequencies for each site. If the site switches to the alternate frequency due to interference or maintenance, you will lose the site. Happy scanning!