Batboard

I HAVE RECENTLY INSTALLED A NEW SIMPLEX (ONE DIRECTION) REPEATER. I HAVE MADE SURE THAT THE CABLE IS IN THE RIGHT POSITION AND IT IS NOT WORKING. THE TWO RADIOS DO NOT APPEAR TO BE TALKING TO EACH OTHER.THE CABLE IS INSTALLED BETWEEN AND LOW BAND AND UHF CDM 1250 AND CDM 1550 LS (RESPECTIVELY). DO I NEED TO CHANGE THE PIN ASSIGNMENTS? OR DOES SOMETHING ELSE NEED TO BE DONE.

THANKS
KEVIN

a simplex repeater uses some kind of recording device that re transmits on the same frequency and don't use two radios. what exactly are you trying to do?

Your caps lock key seems to be stuck.

After you fix that, post the current programming for your pin assignments as well as the diagram or connection details of the cable you are using.

That should be sufficient information to help someone analyze your problem.

WHAT I AM TRYING TO DO IS TAKE THE OUTPUT FROM A LOWBAND MOTOROLA CDM 1250 AND SIMULCAST IT ON A UHF CDM1550 LS (BUT ON A CONVENTIONAL CHANNEL). I HAVE A CABLE FROM http://www.kawamall.com/pd_repeater.cfm THAT I PURCHASED. I HAVE MADE SURE ALL THE RADIOS ARE RECEIVING AND TRANSMITTING FINE, THE PROBLEM JUST LAYS THAT THE TWO RADIOS ARE NOT TALKING TO EACH OTHER. I HAVE TRIED CHANGING ALL THE PRESETS FOR THE PINS I.E. (RICK OR I20 TX, COMMUNITY RPTR ZR310 TX...) BUT I COULD NOT GET ANY OF THEM TO WORK. I ALSO HAVE TRACED WHICH PINS ARE LINKED ON THE LINKING CABLE I FROM WHAT I CAN TELL THE GROUND FROM THE RX RADIO IS COMING FROM PIN 8 AND SELF GROUNDING INTO A RESISTER, THE CONTROL OUT (PTT) COMES FROM THE RX FROM PIN 4 BUT I CANNOT TELL WHERE IT IS GOING, THE MIC AUDIO OUT I CANNOT TELL WHERE IT IS COMING FROM BUT GOING TO PIN 12.

HOPEFULLY SOMEONE CAN HELP

THANKS,
KEVIN

so you want to make a crossband repeater. first thing is do you have a license to be able to simulcast the original transmission?

I dont know if the cable is labeled or not but you might want to try reversing the plugs. Also you need to check the pin assignment on the rx radio-low band. Usually you set pin 8 or pin 14 for pl/csq detect. Check your cable to find out if there is a pin in 8 or 14. The transmit radio-uhf should not need any special programming, except to make sure pin 3 is ptt, which I cant remember if its programmable or not. Are you using this for paging?

Yes, everything is liecenced, it is from a low band channel in which i have written permission from the user to simulcast it onto my uhf commercially liecenced frequency. I have spent sometime trying to figure out in which what pins are doing what. From the best i can tell there is a wire coming from pin 1 (which carries audio) to pin 12, pin 12 being fully programmable i have set it to be mic ptt input. Then the line from the rx to the tx comes from pin 4 (fully programmable) to pin 7 (the ground). Now i can not figure out why the pin from from pin 4 in which i can tell it to be the pl/csq detect into the ground of the tx radio. The third wire comes from ground of the rx and then appears to be either self grounding or incorporates in the the pin 1 to 12 connect (in which there is a resister there that is suppose to impose a ten millisecond delay. I hope that paints a better picture of what pins are going where so i can get this mess straighten out.

Thank you everyone for your help
Kevin

Try this it was from a GM300 which is not much different than the CDM for in assignments
PLEASE NOTE CDM has more pins so make sure they align up

Linking Radios for Repeater/Crossband Operation

"If you need a repeater interface cable to connect a couple of GM300, M120, or M10 radios together, look http://batlabs.com/rptrcabl.html."

Also check http://batlabs.com/htpro.html which has the CDM pinouts.

Glad that you found the CAP LOCK button.

ok then this is what happened to me with that same cable i got from those guys. my old repeater was wideband with 2 gm300's and that cable worked just as good as a rick. but when i changed over to narrowband i first got 1 cdm1250 and replaced 1 of the gm300's with it. i could not get those two to work with that cable when the 1250 was on recieve but it worked when the 1250 was the transmitter so i left it there. then i got a cdm1550 and made it totally narrowband but the two cdm's would not work at all with that cable. they both worked as the transmit radios along with a gm300 but not togather. so i got a real rick and now it works perfect. don't know why, can't explain it, that cable does the same thing as a rick but for some reason the cdm's won't work with them. and i've even borrowed other cdm's to try with that cable and they didn't work either as a recieve radio so it's not the radios it's the cable. so you have two choices, get some gm300's or maxtracs or get a real rick.

i'll add this too, i also tried that cable with a cm300 and it had the same results as the cdm's, it worked for transmit but would not pass recieve. but the cm300 did work for recieve with a real rick.

I have had trouble using Pin 4 for COR/PL Talkgroup Detect on the CM and PM series radios when interfaced with IP-223's as it just doesn't go low enough with a valid signal. Changing to Pin 8 has solved the problem in my situation, might be worth a shot.