Gai-tronics ICP9012A 12ch console, issue w/radio patch

[W1HVN]

Anyone have an idea of issue were running I to?

Have a 12 channel Gaitronics (newer current production model, not older Moto) console, with various control station radios (CDMs, Astro Spectras, etc) connected and all line level set to -5db with two wire control. No leased lines all local, and two of these consoles in parallel. When patching say a VHF and UHF using the radio patch feature on either console, all works well until.... The console senses audio on another channel (unselected) and not selected in patch setup while someone is keyed in the patch, when this occurs the transmit side of the patch locks up. It can be a key beep, a pop from powering a radio on, or receive audio to one of the other 10 unselected channels, when it senses the audio and again, the patch is in progress and keyed, it locks up the tx side until the patch is turned de selected or you hut the tx button on the tx channel which unlocks it from tx.

Anyone have any ideas?

Makes Zero sense to me why audio coming down the pair of an unselected channel would have any affect on the patch of two selected channels...

If no audio emanates from the other radios or they are turned off, no problem at all, works as it should.

Thanks in advance...

[d119]

have you engaged Gai Tronics on this? I would start there - perhaps there is a firmware update available for it.

[W1HVN]

I have a call into them, waiting for a tech rep to call me back.

[FMROB]

I didn't read into you problem to deep, could it be cross talk in the wiring? The -5 line level for local control sounds a wee wee bit hot, maybe? If wiried in parallel, is the console and/or TRA set for high impedance.

I would try disconnecting all the lines and trying different combinations of lines and patching. Try to drill down on which lines or lines may be causing the issue, if you can. The problem sounds interesting, and may just be a issue in the console, and nothing more than that?

[W1HVN]

Bingo. Crosstalk. Levels went back down to neg 10. Also one radio was seeing some reflected power, something that arose since we last checked and analyzed the antennas and lines, and that seemed to add insult to injury and amplify the anomaly.

Hope this helps someone in the future who may see this.

As an aside, Manufacturer never returned my call.

[FMROB]

Wow, excellent. I acutally provided some useful info.. You can actually thank Bill G for that insight, as he helped me out with a similar problem years back?

[Bill_G]

Each one teach one Rob. Good call.