For the benefit of anyone who may experience a similar problem in the future,
Erich, Howard, and I had a discussion of this issue via private email. The
method I described in my prior post apparently does not work with Yaesu rigs,
because they do not allow variation of the transmit frequency while
transmitting. So Yaesu owners should do the following, per Erich, the author
of SatPC32:
While the satellite, say FO-29, is in range for you choose that satellite
and open menu CAT. Transmit and whistle or say Test etc. With the
Downl. Corr. controls tune the RX radio until you hear your own signal
with the correct audio pitch. Then stop transmitting. You will see the
correction value in the Downl. Corr. window. For certain reasons this
correction can't be stored automatically, however. Therefore with the
Upl.Calibr. controls set the same correction value, but in the opposite
direction. If, i.e., you corrected the downlink by +1450 Hz correct the
uplink by -1450 Hz. Click on Change/Store Data File and save the uplink
calibration. In the frequency list of menu CAT you will see that only the
uplink entry changes.
When you restart the program it will start with the calibrated uplink
frequency and no downlink correction.
--- On Fri, 5/15/09, Bill Dzurilla billdz@yahoo.com wrote:
From: Bill Dzurilla billdz@yahoo.com
Subject: Re: Satpc32 with 2 Transceivers
To: amsat-bb@AMSAT.Org
Date: Friday, May 15, 2009, 4:22 PM
Howard,
With Erich's kind help, I was able to get SatPC32 working
last week with 2 transceivers.
I had a similar problem with the SSB sats at first. I
could not hear my downlink while the program was controlling
the frequencies on the 2 rigs. It turned out that the
issue was that the default settings for some of the birds
was off (either because my rigs are off calibration or
because the frequency on the sat's transponder drifted since
Erich wrote Doppler.SQF).
The fix is not difficult. With the program
controlling the rigs, and with the satellite near to its
maximum elevation on a pass, tune to a clear downlink
frequency and click CAT on the program. Then start
transmitting (say testing, testing, count to 10, anything)
while clicking on the up and down arrows under Upl. Calibr.
(Hz). When you hear your voice on the downlink in a
natural sounding tone, click Change/Store Data File and
then click save, which automatically changes the Doppler.SQF
file. Once set correctly for each bird, your uplink
and downlink will track perfectly.
I couldn't get it right at first because I kept clicking on
the 10 hz arrows. This was insufficient, as some of
the sats were over 500 hz off. But it was easy after I
started clicking the 100 hz arrows.
You can also manually review and edit the Doppler.SQF file
by clicking ? and then Auxiliary Files, but this should not
be necessary.
73, Bill NZ5N
Date: Fri, 15 May 2009 11:22:53 -0500
From: Howard Kowall hkow...@shaw.ca
Subject: [amsat-bb] Satpc32 with 2 Transceivers
To: AMSAT-BB@amsat.org
amsat-bb@amsat.org
Message-ID:
000a01c9d579$65dbc2f0$6701a...@sysoffice
Content-Type: text/plain;
charset=iso-8859-1
Good morning everyone
Trying to run Satpc32 with a FT897d and FT817nd
The ft897nd is on the uhf antenna and the ft817nd is on the
vhf antenna
it all seems to work on the FM sats but having some
problems with ssb sats AO7,VO52,FO29
The trouble I am having is on the calibration of the freq.
and doppler adjument
has anyone run into this
hopefully someone has a few pointers and tricks
Thanks to all who reply
Howard
VE4ISP
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