Maxtrac Receiver Adjustment - Low Sensitivity
Posted: Tue Jan 25, 2011 3:28 pm
Hey all -
I just finished swapping out logic boards on some Maxtracs to get a low split, low band Maxtrac with full signaling support. Of course, I recorded the tuning values from the RF board prior to installing the new logic board, so I put the old values back in after replacing the board.
Transmitter looks great -- only 40 Hz off frequency... however, the receiver is a bit deaf... -100 dBm barely breaks squelch, and its completely silent at -110 dBm.
Not having worked on Maxtracs in depth before, I was wondering if there's any way I could improve the RX sensitivity.
Note: I am using the proper RF board for the frequency range I need - not trying to do any squirrelly out-of-band stuff here. I don't have access to the service manual right now, but I'm doing my best to come up with a copy.
Thanks for the help.
I just finished swapping out logic boards on some Maxtracs to get a low split, low band Maxtrac with full signaling support. Of course, I recorded the tuning values from the RF board prior to installing the new logic board, so I put the old values back in after replacing the board.
Transmitter looks great -- only 40 Hz off frequency... however, the receiver is a bit deaf... -100 dBm barely breaks squelch, and its completely silent at -110 dBm.
Not having worked on Maxtracs in depth before, I was wondering if there's any way I could improve the RX sensitivity.
Note: I am using the proper RF board for the frequency range I need - not trying to do any squirrelly out-of-band stuff here. I don't have access to the service manual right now, but I'm doing my best to come up with a copy.
Thanks for the help.