CDM1250 Delay

KG4LHQ · Post by **KG4LHQ** » Mon May 15, 2006 11:10 pm

Hello,

I have a CDM1250 Motorola and this thing when receiving is horribly slow when it comes to RXing a signal even while its not on scan. On my HT1250 it opens right up when a signal is transmitted but not this radio... Any settings that I can change in the software to fix this problem.

SD70MAC · Post by **SD70MAC** » Tue May 16, 2006 3:14 am

Go to radio configuration and then to the scan tab in the CPS. Then set the scan hang time. I have mine set to 750.

RFguy · Post by **RFguy** » Tue May 16, 2006 5:13 am

Do you have MDC signalling enabled on RX?
Maybe you have DOS holdoff enabled?

KG4LHQ · Post by **KG4LHQ** » Tue May 16, 2006 7:40 am

Ok... After reading the radio I found that my Scan Hangtime was 1000ms and my DOS Auto Mute thing was 500 so I changed the scan hangtime to 750ms and changed the auto mute to 25 working great now

Thanks.

RKG · Post by **RKG** » Wed May 17, 2006 6:45 am

Scan hangtime has no effect on receiver attack time; it only affects how long the radio dwells on the landed scan channel after loss of carrier (waiting to pick up replies that might be lost if the radio were to resume scanning). I'd increase the scan hangtime back to something closer to 3 sec.

jim · Post by **jim** » Wed May 17, 2006 6:54 am

These radios are horrible on PL/DPL decode time- especially if using DPL.

They are so slow that when using DPL, if your QCII "A" tone is too short, it will not decode a QCII call. Disabling PL/DPL on RX will allow fast response if you are alone on the frequency and don't get bothered by another user.

bandaidken · Post by **bandaidken** » Tue Mar 20, 2007 4:10 am

This is an old thread, but I was hoping for a follow up?

I'm having the same problem.

When NOT scanning, the CDM1250 picks up the RX about a second after my scanner does.

I do have the MDC on the receive.

I frequently miss acknowledgments.

Above they mention the scan hang time, but the radio is not scanning.

Changing PL to DPL is not an option.

Thanks

bundy125 · Post by **bundy125** » Tue Mar 20, 2007 5:23 am

If you have access to the CPS for the radio, read it and go to the signalling menu. Once there you'll find a drop down field to for dos auto mute. Select disable, and this should fix your problem.

bandaidken · Post by **bandaidken** » Wed Mar 21, 2007 12:54 pm

bundy125 wrote:If you have access to the CPS for the radio, read it and go to the signalling menu. Once there you'll find a drop down field to for dos auto mute. Select disable, and this should fix your problem.

I'll try it.

Thanks

nmfire10 · Post by **nmfire10** » Wed Mar 21, 2007 2:03 pm

They are also not suggesting changing from PL to DPL. They are saying set it for NO PL or DPL (CSQ). That will show if it is a slow PL/DPL decode or it is the DOS mute.

KG4LHQ · Post by **KG4LHQ** » Thu Mar 22, 2007 11:16 pm

Change your DOS Mute time or whatever its called to 25... I think default is set at 500 from the factory which is your 1/2 sec delay.

CDM1250 Delay

CDM1250 Delay

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