It sounds like you have something that is shorting the monitor audio back to
the mic.
If I understand all your options, you get it in lsb/usb even with the
monitor off?
How about in AM?
Or in pkt-lsb??
Does turning the mic gain or compressor down affect it?
Does the monitor volume affect it (even if the switch is off)?
David Robbins K1TTT
e-mail: mailto:k1ttt@arrl.net
web: http://www.k1ttt.net
AR-Cluster node: 145.69MHz or telnet://dxc.k1ttt.net
> -----Original Message-----
> From: Scott Dickson [mailto:w5wz@w5wz.com]
> Sent: Thursday, October 29, 2009 12:39
> To: yaesu@contesting.com
> Subject: [Yaesu] 1000MP audio/mike feedback - CAT pulse noise
>
> My 1000MP started this problem this week.
>
>
>
> The problem sounds like audio feedback like occurs when an open mike is
> placed near an active speaker. It is heard in both the MONITORed audio in
> a
> headset or via the external speaker, as well as always being transmitted
> on
> the air.
>
>
>
> There is also a pulsing noise that is synchronized with each time the CAT
> light turns on. I'm using N1MM and the CAT light pulses basically once
> each
> second.
>
>
>
> My station is an SO2R setup with 2 'MPs. I have swapped the rigs from the
> left to right positions, and the problem follows a specific rig.
>
>
>
> The problem occurs under these conditions:
>
> USB or LSB
>
> Any band
>
> Monitor on to hear it as well as always being transmitted regardless of
> monitor on/off Processor switch on or off Headphones plugged in or not
> plugged in Mike (Heil headset) plugged in or not plugged in Going PTT via
> footswitch or front panel MOX button Any accessory cables connected to the
> rear of the rig or disconnected.
>
> Coax connected or disconnected.
>
>
>
> Using 120vAC power cord
>
>
>
>
>
> To be precise, with ONLY the 120vAC power cord connected, and no other
> wires
> or cables of any sort to any plug or jack, and using the MOX button, the
> problem still occurs.
>
>
>
> The only thing to seems to lessen it is reducing the RF power to minimum.
>
>
>
> --Scott, W5WZ
>
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