It took me quite a bit of digging to find this.  I kept thinking it was 
a manu setting.  It is not.  To toggle this function on or off, press 
function and then the xmit power button.  You can check this by opening 
the squelch on the oposite band and transmitting on the main band, the 
noise shoudl either change volume or not, depending on how you have it 
set.
73s
Butch Bussen
wa0vjr

On Sat, 3 May 2008, T Behler wrote:

> Hi, folks.
>
> While doing a skywarn net for our area last night, I noticed something kind
> of weird with my TMV71A.  It may have happened before, and I just didn't
> notice it till last night.
>
> Our local 2-meter repeater, on which I do my local skywarn nets, is at
> 146.74 MHZ with a standard negative off-set, and no PL.  That repeater is
> set on VFO A.
>
> When in a skywarn situation, I also monitor an area-wide NWS skywarn net on
> 145.270 on VFO B.
>
> Last night, I noticed that, whenever our 146.740 repeater transmits, the
> audio level on the 145.270 repeater is diminished considerably.  Once our
> repeater stops transmitting, the audio on the 145.27 repeater comes back to
> a normal level, after about a second's delay.
>
> Is this normal?
>
> Have any of you experienced this problem?
>
> Do you have any suggested solutions?
>
> It's not an "end of the world" type of thing, but it just kind of surprised
> me.
>
> 73 from Tom Behler:  KB8TYJ, Big Rapids, MI
>