Micor

GEMOTO · Post by **GEMOTO** » Fri Dec 29, 2006 10:52 am

Hi Everyone,

I have a slight dilemma. I am using a UHF Micor as a transmitter. It's a 75W unit. I am using a tone remote to key it on Line 1 on the back plane (the connector on the bottom left).

It works fine but then I am talking the LLGT comes through. Also if I hook a comparator (Spectra TAC) up to it the LLGT comes through on TX audio and what I believe is HLGT on the tail (set to 3 seconds).

Is there a jumper or setting on the backplane of the Micor that needs to be set? I did change the Guard tone decoder card out with a few different known good ones and the problem still exists.

Bruce1807 · Post by **Bruce1807** » Fri Dec 29, 2006 12:07 pm

from memory a long long time ago the guard tone decoder has a tunable coil on it (the black round one). This should be tuned to notch out the guard tone.

Post by **xmo** » Fri Dec 29, 2006 12:18 pm

The 2175 notch filters are on the F1-PL module.

The transmit notch filter could need alignment - or - an incorrect station jumper configuration could be allowing transmit audio to bypass the notch filter.

GEMOTO · Post by **GEMOTO** » Fri Dec 29, 2006 1:23 pm

I just tried adjusting the notch filter on the card but it did not get rid of the tone. I am thinking it may be a jumper on the backplane of the station or maybe a jumper on the card. I dont have the manuals with me so I cant look it up.

Dan562 · Post by **Dan562** » Fri Dec 29, 2006 11:38 pm

GE/\/\OTO,

Is it possible that you have the wrong Line Driver Module in the Micor station? According to the Option C269 SP Manual # 1S-SP3011486 you should have a TRN6552 4-Wire LDM which replaces a TLN4669 2-Wire LDM version.

Dan

k2hz · Post by **k2hz** » Sat Dec 30, 2006 10:29 am

I am looking at the Micor control shelf manual.

For a Unified Chassis shelf:

On a tone remote base or repeater, the only jumper (1-8) that should be IN is 5. Jumper 3 is in on DC stations only.

The only exception is a 4 frequency tone remote base in which case 5 is OUT and 6&7 are IN.

For a TCN1107A Shelf:

Jumper 2&3 IN, 1 & 4 OUT for Tone Remote Base

Jumper 2 IN, 1,3 & 4 OUT for Tone Remote Repeater

No jumper settings are shown for the TCN1125A shelf.

The un-notched audio comes into the F1/PL card on pin 18 and filtered audio leaves on pin 22. I dont see any jumpers on the card so if the filter is bypassed it must be on the backplane. It look like this could happen if JU-1 was in on either type of shelf.

GEMOTO · Post by **GEMOTO** » Sun Dec 31, 2006 11:07 am

Perfect! JU1 was in fact connected, I removed it and the tone is gone.

Thanks for all of your suggestions!