LTR Controller issue

[teejayn]

I have a customer who has a single site 3ch UHF LTR system.
3 NX-5800 Repeaters, and 1spare. Total 4 repeaters
3 100w Crescend Amps
3 Bridgecom Controllers
4ch TXRX combining system w/8 ch multicoupler

System’s been running for 3 years with no issues. Then Ch 2 had issue. It would not handshake when keyed up from a distance. We checked power out from all repeaters, amplifiers, combiners. Check rssi from multicoupler antenna port, CH2 repeater. VSWR from combiner. Also reprogrammed spare repeater to ch2. Same issue.
Put the customer back on the old LTR Motorola system, running MTR3000 w/trident controllers using the same dual antenna system.
Sent CH2 repeater and controller back to Bridgecom. They said no issue and sent it back to us.
We reinstalled the NX5800 w/Bridgecom system and did full pmi again. Ch2 was up and running then went down again after about 3 hours, same issue.
We put the customer back on the old Motorola system.
Anybody experience an issue like this before and any suggestions, did we anything?
Was planning to just buy a new Bridgecom controller and see if the issue is the current CH2 controller.

 

[Project25_MASTR]

Can you slap the CH 2 MTR in place of the CH 2 NXR-5800 using the Bridgecom controller? That will tell you if the issue is the controller or not.

 

[teejayn]

We tried that with the spare NX5800 repeater that was in site. Same issue

 

[teejayn]

We tried the spare repeater the first go around. We can try the spare repeater again and see if that does anything. Thx

 

[WB5UOM]

If its the same issue whether or not your using the KENWOOD or Motorola ch2 pair with their respective controllers, then its not the channel. its cabling,tuning,filters something

 

[16b]

Can you swap the CH2 controller with the controller from one of the other channels and reprogram accordingly? Then see if the problem follows the controller or stays with CH2

 

[teejayn]

If its the same issue whether or not your using the KENWOOD or Motorola ch2 pair with their respective controllers, then its not the channel. its cabling,tuning,filters something

I asked Bridgecom to fabricate another ltr cable, we’ll be replacing all cables associated to that channel and hopefully that works. Thx

 

[Cameron314]

I had no idea Bridgecom (or anyone else for that matter) was making LTR controllers.

 

[Cameron314]

 

[TampaTyron]

Have you performed the LTR controller/repeater alignment procedure? On the Trident stuff, you had to preset all the pots to zero, then send a signal at a specific deviation with a specific PL, then take voltage measurements, then adjust pots, then measurements, then pots, etc, etc. TT

 

[kayn1n32008]

Uggg pre/post MDC and the *!@#$%& squelch crashes.