Buck,
I would suggest that you not worry about the noise burst until you can
get a good response out of the mic.
If you do not have a computer mic handy, borrow one and plug it into the
rear panel mic jack. See if you can obtain a response on the ALC meter
with that microphone. All computer type microphones need bias. Buy one
if you must - they can be had for just a few dollars (less than what the
frustration is costing you).
If the rear mic jack works, then your problem may be the DSP board to
Front Panel connector mating that I mentioned.
73,
Don W3FPR
On 3/16/2019 7:13 PM, Buck wrote:
I've tried all the combination of mics and mic bias. The noise
happens even with the mic gain turned all the way down and the rig in
TEST mode. It happens when N1MM is not running. It happens using the
internal DVR card. It happens with the mic disconnected and using the
XMIT button on the front of the radio.
-
Here is a clue. If I turn on the VOX and reduce the either the RF or
AF gain on the receiver, I start getting the noise about once every
half second. It sounds like it starts with a "ping." Sounds like
something is polling the radio.
If I disconnect the USB cable on the back of the radio, no noise. It
seemed to be properly seated. Now, if I plug the USB cable back into
the radio, no noise. Have I found the culprit? A lose USB cable?
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