Type II trunking

[mfrange99]

What determines the frquencies that a subscriber will tx and rx when assigned to a voice channel?

[RADIOMAN2002]

Depends on the system, for 800 and 900mhz systems there is a table located in the radios main CPU, that based on the channel number sent out by the controller it looks up and goes to. On OBT (150-500mhz) systems, those tables are programmed in and part of the radios codeplug.

[mfrange99]

using smartnet ii 6809 controllers with 4 quantar channels 800mhz. reprogrammed quantars for new freqs, reprogrammed xts 5000 for new control channels. The portable will communicate with control channel but will tx and rx the old frequencies that the trunking system was on.

Also have a question about partition as a command via smt port on the controller. it display hex numbers, but i'm not sure what it's telling me. cannot find the command anywhere in the manual.

[RADIOMAN2002]

I am assuming that you are setting up for rebanded frequencies, was the portable/mobiles reflashed for rebanded channels? I am not a systems expert, maybe someone else can chime in here with some better answers or some better troubleshooting questions to try and solve your problem.
Possibly you may also have to reprogram the controllers to know what frequencies that it's responsible for. The controller could be sending the old channel number to the radio when it requests a channel, and not the new one.

[Wowbagger]

Did you reprogram the frequency table *in the mobiles*?

All that goes out over the air is something like this:
Keying Mobile (on CC inbound): I'd like to TX on talkgroup X - may I have a channel
Controller (on CC outbound): You may TX on channel #5
Keying mobile (looks at internal channel map) - let's see, channel 5, that's TX on 456.7890MHz, RX on 436.7890MHz. OK, set my TX freq to 456.7890MHz, generate talk permit tone, start TX.

If you didn't tell the radios about the new channel mapping, when they are told to go to channel #5, they will look up the wrong freq.

On of the things that APCO-25 does differently is transmit information about the channel number to frequency on the control channels (IDEN_UP and IDEN_UP Extended), so the radio can update its channel map over the air.

[RADIOMAN2002]

You cannot reprogram the frequency table in an 800 mhz radio. That's hard coded in the micro-controller, and has to be updated with a new flash. Only OBT (150-500mhz) systems can you set the frequency table.

[wavetar]

using smartnet ii 6809 controllers with 4 quantar channels 800mhz. reprogrammed quantars for new freqs, reprogrammed xts 5000 for new control channels. The portable will communicate with control channel but will tx and rx the old frequencies that the trunking system was on.

I don't see it mentioned here, so I'm assuming you didn't reprogram the Smartnet controller with the new frequencies? It's the controller that tells the field radios what voice channel to go to via 'steps'. The field radios can find the control channel, since that's defined in the radio. But, the controller tells the radio "go to voice channel frequency xx steps from 8xx.xxxx (lowest control/voice frequency in the controller codeplug). So, your controller will of course tell the field radios to go to the same frequencies it always has, unless you make the changes in the codeplug.

Reprogramming a new Smartnet controller codeplug is something Motorola has to do, and costs in the 1-1.5K range...if they even do it for those old controllers anymore.

[Wowbagger]

You cannot reprogram the frequency table in an 800 mhz radio. That's hard coded in the micro-controller, and has to be updated with a new flash. Only OBT (150-500mhz) systems can you set the frequency table.

I assumed he'd reprogrammed the controllers with the correct frequencies, and thus the only way he'd get in trouble was if he was running other band trunking, requiring updating of the mobiles.

[escomm]

Yes the controller will need to be reprogrammed, I don't think Motorola is making CP chips anymore and I think they are done by Genesis now. Or if you have a copy of R34...... FWIW when Motorola was still making them they bid and quote one for me at about $2500

[d119]

Yes the controller will need to be reprogrammed, I don't think Motorola is making CP chips anymore and I think they are done by Genesis now. Or if you have a copy of R34...... FWIW when Motorola was still making them they bid and quote one for me at about $2500

R34?

Details?

[escomm]

Codeplug programming software for 6809 and family

[RADIOMAN2002]

If this part of re-banding, you should be able to get Nexthell to pay for it, whether Motorola will do it or not is another question. I doubt Nexthell is going to want to pay for a new controller, but that looks like your problem, and it's a shame that a perfectly good controller is no longer supported, maybe you can sell it to some other agency who can use it for parts.

[mfrange99]

codeplug chip for the controller with new freqs and base station identifier being blown.

[borisf]

codeplug chip for the controller with new freqs and base station identifier being blown.

I'm pretty sure it says "no robot porn" somewhere in the forum rules.

[kj4bnd]

Who makes the codeplug now adays and how much$$