George:
Thanks for the reply. So by repeatedly trying the same thing, have I shifted the uplink frequency by a bit more every time? Sounds like I may need to set those back. Or else just find a new value in the opposite direction (starting a few multiples of the 160), set it once, and leave it.
73, David, KY7DR
On /20170621/ 00:55, George Henry wrote:
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.
73, George, KA3HSW
----- Original Message ----- From: "David Rush" david@rushtone.com To: "Amsat BB" amsat-bb@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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