[amsat-bb] SatPC32 Doppler Correction/Calibration?

George Henry ka3hsw at att.net
Wed Jun 21 04:55:17 UTC 2017

You're doing it right...  once you store the uplink calibration, the 
calibration values WILL return to zero, but if you look at the uplink 
frequency displayed in the right-hand panel of the CAT window, it will have 
a new value which is offset from the original frequency by whatever 
calibration value you stored.

George, KA3HSW

----- Original Message ----- 
From: "David Rush" <david at rushtone.com>
To: "Amsat BB" <amsat-bb at amsat.org>
Sent: Tuesday, June 20, 2017 7:59 PM
Subject: [amsat-bb] SatPC32 Doppler Correction/Calibration?

> I'm trying to get the doppler correction/calibration set up for the 
> various birds before Field Day, but I'm just not making any tangible 
> progress.
> I've got a pair of Yaesu FT-817ND rigs, and can successfully tune both of 
> them with SatPC32's CAT controls.
> Following the directions for a two-rig calibration process, I've been 
> catching the XW-2* birds and can occasionally get the downlink correction 
> set to where I can hear myself on the downlink.
> In a couple of cases I've made note of where that downlink calibration was 
> near mid-pass (the necessary correction changed constantly across the 
> pass).
> Then I go into the CAT menu, set the downlink correction to zero and the 
> uplink calibration to the opposite sign of the previously found downlink 
> correction at mid-pass.
> For example on a recent pass of XW-2C I found a downlink correction 
> of -160 Hz was working well near mid-pass (I could hear myself) so I set 
> the uplink calibration to 160 Hz.
> The "Upl. Calibr." window in the CAT pop-up says "160", and the grey box 
> above the uplink frequency in the main window also says "160".
> I click on the "Change/Store Dataf File" button, then click on the "Store" 
> "Uplink Calibration" button on the next pop-up.
> It says "The changings have been stored!" but the uplink calibration in 
> both the first popup and the main window are back to zero.
> I click the X to close both pop-ups, and uplink correction in the main 
> window is still 0.  I exit the program, restart it, select XW-2C, enable 
> CAT (C+) and the uplink calibration is still on zero.
> What am I missing?
> David, ky7dr
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