I've been doing something similar with Spectogram. Also helpful for setting
the sidetone on your rig to the desired frequency.
73 de KI8JQ - Phil
----- Original Message -----
From: Henry Mauro <hmauro@pacbell.net>
To: <tentec@contesting.com>
Sent: Saturday, January 20, 2001 7:49 PM
Subject: [TenTec] CW tuning with Digipan
>
> I've been using Digipan (the free PSK31 software program) for CW and
> RTTY tuning for a while and it really work great. It even helps on
> SSB. Here's how:
>
> ON CW: Digipan displays the complete audio spectrum coming from your
> receiver as a waterfall display. When you engage a CW filter and tune
> to a spot in the band with noise and no signal you will see swath of
> blue that shows you exactly what audio frequencies are in the passband.
> Recent versions of Digipan let you place a marker (looks like a thin
> red line) at any audio frequency. I put a marker at 600 hz (my
> preferred side-tone frequency). CW signals appear like a dashed yellow
> line. To get on frequency, you just tune until the yellow CW signal
> lines up with the red marker. You are now dead-on frequency. I find
> it much easier to do this visually than to match the CW tone with the
> spot tone in my head.
>
> There is the added benefit in that you can see just exactly where your
> PBT control is placing the passband. For instance if you use a 250
> hz filter you can center the passband on 600 hz exactly. If you cascade
> first and second IF filters you can see exactly what the result
> looks like. Also for the first time, I find I can use the manual notch.
> It looks like a black snake that you move to cover up an interfering
> signal. Its much easier to get on target visually than by ear.
>
> ON RTTY: -- I put markers on the mark and space frequencies and center
> the 500 hz filter on them. You tune the radio until the RTTY signal
> lines up with the markers. This beats the display on my PK232 by far.
>
> ON SIDEBAND: I have the INRAD 2.8 filters in both the 9mhz and 6 mhz
> IF. With the waterfall display I can line them up perfectly for the
> widest (best sounding) response.
>
> Connecting the sound board to the radio was pretty easy with the OmniVI.
> No isolation transformers, attenuators or the like were required. Just
> audio cable between the sound card and the radio. For receive only, the
> adjustment of the audio level was a snap. Things got a bit tricky
> when adjusting levels so the VOX worked on transmit but not too bad.
>
> The only warning is that once you get the sound board hooked up to the
> radio there is seemingly no end to the software to check out...
> MFSK16 is the latest WOW.
>
> 73, Henry, W6GZ
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