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Diagnostic mode 700 vs 500

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mdsxfire

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When u hit center joystick then buttons 224132 center joystick and go into the diagnostic menu on a 500 system the RX/TX freq will change to correspond with whatever pair is being used for that traffic, but when on a 700 system it doesn’t do the same thing (whether a Harris or Motorola system) this isn’t a major issue just wondering if anyone else has noticed this and is there a reason for the difference.
 

Uni1

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It appears to be system specific. Some do it on 7-800 here in Dallas and some dont.
 

GTR8000

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I suspect it's an FDMA vs TDMA issue.

The 500 MHz system/site he's monitoring (457 - Somerset County, NJ) has a lot of FDMA activity on the 500 MHz cell. The 700 MHz system/site he's monitoring (39A - NJICS/Union County) is almost exclusively TDMA activity.

@mdsxfire could confirm this by noting which mode talkgroups are operating in when the traffic channel is correctly displayed, vs the G5 continuing to display the control channel when there is activity.
 

rr60

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Or @mdsxfire could compare against LEO’s Somerset’s 700 cells which are mostly TDMA. I suspect @GTR8000 is on target.
 

GTR8000

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Yes, a direct comparison of Somerset's 500 cell vs 700 cell would be better than comparing two separate systems.
 

mdsxfire

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Or @mdsxfire could compare against LEO’s Somerset’s 700 cells which are mostly TDMA. I suspect @GTR8000 is on target.
Somersets 700 was the system I wanted to show or Middlesex countys but of course the night I was trying there was no traffic on either when I was recording so they flipped to NJICS, but that probably is the difference. do the LEO TG that are on the 700 system and get simulcast to the 500 system still come over the 500 in FDMA?
 

GTR8000

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Currently there is no way to tell if a TG is in FDMA or TDMA mode correct?
Assuming you don't have another piece of hardware that would display FDMA vs TDMA (such as a Uniden scanner), I would suggest investing $20 in an RTL dongle so you can run Unitrunker or DSD+ software on your PC. That will make it clear what mode talkgroups are operating in as you test the G5's beta firmware. Frankly, anyone who is interested in trunked systems ought to have one of those dongles anyway, it reveals an awful lot about how the systems function. You could even have two dongles going, one on the Somerset 500 cell and the other on the 700 cell, running side by side in Unitrunker. That would allow you to see all of the activity on both cells simultaneously to get a better sense of what talkgroups are FDMA vs TDMA and which are carried on which cell, or across both.
 
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