On 7/1/2010 4:50 PM, CSM(r) Gary Huber wrote:
> Even if you have a clean, low distortion signal, while using an amplifier,
> you need to keep the output to 50W or so to avoid causing AGC compression in
> the receivers of the other stations in the PSK-31 sub-band.
AH YES .... OK. I see I need to consider the other
end of the exchange. I thought you were trying to say
something more in your previous post ! Sorry if
I did not get it the first time.
> that in PSK-31, many stations are simultaneously using a single 2500 Hz SSB
> bandwidth with a recommended output of 30W. When there are QRO signals in
> the waterfall, the receiver AGC typically causes the weaker signals to be
> less likely to be decoded as their audio will be reduced.....
OK... that makes sense. Once again, there is more to
it than just having a clean signal out.
Few DX-peditions want to offer PSK-31
> contacts for the very reason that many operators will not abide by the
> self-imposed low power necessary to share a PSK-31 sub-band.
I am just now setting up my station to do digital modes, so
this is quite timely advice. I think I will order the ARRL
book on digital modes... clearly there is way more to this
than the local rabble let on - who say all need is a sound card,
a cable, and some free software like HRD...
I did not pay much attention to this when studying for the
license exam because I did not think I would ever get into
digital modes. But, just as with learning CW, I am now
attracted to the digital modes in order to be a
fully informed operator.
THANKS ============= K8JHR =======================
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