On 10/14/2019 12:05 PM, Dale Boresz wrote:
I don't operate RTTY so I don't know which roofing filter would be
optimum, but I'm sure other RTTY op's can help.
An IF bandwidth in the range of 400-500 kHz is recommended because it
presents the least phase shift to the decoding software. My radios have
2.8, 2, 0.4, and 0.25 kHz roofing filters. My standard IF setting for
RTTY is 500 Hz, so I'm using the 2 kHz roofer. In the presence of strong
nearby signals, I'll narrow it up to 400 Hz so the the 400 Hz roofer
kicks in.
73, Jim K9YC
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