There are, of course, exceptions to that rule. When there is a
very strong signal in the passband that is causing the receiver
to reduce gain to the point that a weak signal is not copyable,
a CW filter (400 Hz) centered on the weak signal can often make
the difference between copy and no copy.
73,
... Joe, W4TV
On 4/21/2014 12:58 PM, Jim Brown wrote:
On 4/21/2014 8:28 AM, Larry Lopez wrote:
Or is it better just to use the DSP to narrow it down ?
K1JT says that it is best to run the radio broadband and let the WSJT
software provide the needed selectivity in its decoding algorithm. The
reason is simple -- phase shift can cause decoding errors, filters in
the radio create phase shift.
73, Jim K9YC
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