• To anyone looking to acquire commercial radio programming software:

    Please do not make requests for copies of radio programming software which is sold (or was sold) by the manufacturer for any monetary value. All requests will be deleted and a forum infraction issued. Making a request such as this is attempting to engage in software piracy and this forum cannot be involved or associated with this activity. The same goes for any private transaction via Private Message. Even if you attempt to engage in this activity in PM's we will still enforce the forum rules. Your PM's are not private and the administration has the right to read them if there's a hint to criminal activity.

    If you are having trouble legally obtaining software please state so. We do not want any hurt feelings when your vague post is mistaken for a free request. It is YOUR responsibility to properly word your request.

    To obtain Motorola software see the Sticky in the Motorola forum.

    The various other vendors often permit their dealers to sell the software online (i.e., Kenwood). Please use Google or some other search engine to find a dealer that sells the software. Typically each series or individual radio requires its own software package. Often the Kenwood software is less than $100 so don't be a cheapskate; just purchase it.

    For M/A Com/Harris/GE, etc: there are two software packages that program all current and past radios. One package is for conventional programming and the other for trunked programming. The trunked package is in upwards of $2,500. The conventional package is more reasonable though is still several hundred dollars. The benefit is you do not need multiple versions for each radio (unlike Motorola).

    This is a large and very visible forum. We cannot jeopardize the ability to provide the RadioReference services by allowing this activity to occur. Please respect this.

CDM Vehicle Repeater Issue

Status
Not open for further replies.

mgriswold

Newbie
Feed Provider
Joined
May 24, 2011
Messages
3
Location
Binghamton, NY
Alright, I’m just starting to diagnose the issue but figured I’d enlist some help. What we are looking at is a vehicle repeater utilizing two CDM series radios on VHF and Low Band and an OEM Motorola Rick.

The problem is whenever you talk on the vhf portable through the repeater to low band there is a “cycling” issue every 2-3 seconds with a brief click. Looking at the radios neither one is visible in creating the issue. The low band has already been swapped with no change in the issue. It does not do it talking low band to vhf though. The vhf radio is next to be swapped but it is buried in the truck.

First thought is maybe receive sensitivity is off on the vhf radio? But band split being far enough apart I would think wouldn’t cause and issue there. Any suggestions?
 

kayn1n32008

ØÆSØ
Joined
Sep 20, 2008
Messages
6,601
Location
Sector 001
Alright, I’m just starting to diagnose the issue but figured I’d enlist some help. What we are looking at is a vehicle repeater utilizing two CDM series radios on VHF and Low Band and an OEM Motorola Rick.

The problem is whenever you talk on the vhf portable through the repeater to low band there is a “cycling” issue every 2-3 seconds with a brief click. Looking at the radios neither one is visible in creating the issue. The low band has already been swapped with no change in the issue. It does not do it talking low band to vhf though. The vhf radio is next to be swapped but it is buried in the truck.

First thought is maybe receive sensitivity is off on the vhf radio? But band split being far enough apart I would think wouldn’t cause and issue there. Any suggestions?

Is there priority set on either radio?


Sent from my iPhone using Tapatalk
 

RKG

Member
Joined
May 23, 2005
Messages
1,096
Location
Boston, MA
Long distance, sight unseen diagnoses aren't worth a lot, but I'd be inclined to investigate voltage drop. Key the input, receiver unsquelches and keys transmitter. Voltage drops, which causes input receiver to drop qualification, which causes output radio to unkey, which allows voltage to rise, which causes input receiver to requalify, and so forth. Engine running or off? Output power of output radio? Condition of battery and alternator? Wire size? Condition of connections, especially the grounds?
 

mgriswold

Newbie
Feed Provider
Joined
May 24, 2011
Messages
3
Location
Binghamton, NY
Long distance, sight unseen diagnoses aren't worth a lot, but I'd be inclined to investigate voltage drop. Key the input, receiver unsquelches and keys transmitter. Voltage drops, which causes input receiver to drop qualification, which causes output radio to unkey, which allows voltage to rise, which causes input receiver to requalify, and so forth. Engine running or off? Output power of output radio? Condition of battery and alternator? Wire size? Condition of connections, especially the grounds?


That was one of my first thoughts as well, seems to all be good but I haven’t officially ruled that out as of yet
 

jeepsandradios

Member
Feed Provider
Joined
Jul 29, 2012
Messages
2,005
Location
East of the Mississippi
I installed many of these in the past in fire trucks and ambulances. Where are your antenna's mounted in relation to the RICK. I found that a side mounted lowband ball/whip next to the officers seat would cause all sorts of crazy interference. We started moving the RICK and radios to the drivers side for those applications. I would also check antenna match on all.
 
Status
Not open for further replies.
Top