Or, do the alignment by ear! Yes, by ear. Your ear is a workable
spectrum analyzer you know, even though it isn't calibrated. Knowing
what I do now, here's what I'd do if doing it by ear.
1. Select the narrowest filter you have. Adjust the BFO setting so
that filter is a centered around a 600 Hz carrier as you can get it.
Use an on-air carrier or better yet a signal generator for the source.
2. While listening to atmospheric noise, Adjust each wider filter so it
has the same perceived tone center as the narrow filter. Check it to
see if a carrier is centered (I use RIT for this).
Then, over time, you can make subtle refinements to the filter settings
as your ears become more accustomed to the sound and your errors become
more apparent.
I don't believe you'll get top-notch results from this method but the
reality is the filters only need to be aligned "well enough" to work.
As long as the signal is in the passband, you'll be able to have QSOs.
In fact, I tweaked my SSB settings by ear AFTER I did the Spectrogram
thing. The significant passband ripple affected the overall sound so I
needed to shift things a bit to get a balanced sound.
- Keith KD1E -
- K2 5411 -
-----Original Message-----
From:
[hidden email]
[mailto:
[hidden email]] On Behalf Of Fred (FL)
Sent: Thursday, May 04, 2006 8:42 AM
To:
[hidden email]
Subject: [Elecraft] CAL FIL & Spectrogram?
I can't find any search references to "Spectrogram"
or how to download it on Elecraft mail BB?
I guess $50 is a bit much for this retiree to invest for a sound program
......
Looks like all knowledge on BB of Spectrogram, has been sanitized?
I thought there was a freeware version?
Thanks,
Fred N3CSY
K2 # 5422
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