[amsat-bb] SatPC32 Doppler Correction/Calibration?

[David Rush]

George:

Okay, I'll give that a shot this evening.  Thanks.

David, ky7dr


On /20170622/ 00:10, George Henry wrote:
> Go into your Doppler.sqf file and edit the up- and downlink 
> frequencies back to the original values.  Then use the uplink 
> calibration buttons to find yourself on the downlink.  Then click the 
> Change/Store data file button and store the uplink calibration.  I've 
> never touched the downlink correction on a sat with a linear 
> transponder...
>
> George, KA3HSW
>
>
> ----- Original Message ----- From: "David Rush" <david at rushtone.com>
> To: <amsat-bb at amsat.org>
> Sent: Wednesday, June 21, 2017 7:53 PM
> Subject: Re: [amsat-bb] SatPC32 Doppler Correction/Calibration?
>
>
>> Okay, I followed the instructions (as I described below).  I found 
>> myself on a couple of the XW-2* birds, and kept adjusting my downlink 
>> correction until I was at about peak elevation in the pass (I even 
>> made one contact while one of the birds was still on its way up).  
>> Then zeroed out the downlink correction and entered the opposite in 
>> uplink correction, and saved it.
>>
>> Once I did that I did not hear myself on the downlink, and failed to 
>> find myself, even trying a few 10s of hz of d/l correction either 
>> side, before the birds got too low on the horizon.
>>
>> What am I doing wrong?
>>
>> David, ky7dr
>>
>>
>> On /20170621/ 07:44, David Rush wrote:
>>> 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 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
>>>>>
>>>>> _______________________________________________
>>>>> Sent via AMSAT-BB at amsat.org. AMSAT-NA makes this open forum available
>>>>> to all interested persons worldwide without requiring membership. 
>>>>> Opinions expressed
>>>>> are solely those of the author, and do not reflect the official 
>>>>> views of AMSAT-NA.
>>>>> Not an AMSAT-NA member? Join now to support the amateur satellite 
>>>>> program!
>>>>> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
>>>>
>>>>
>>>> ---
>>>> This email has been checked for viruses by Avast antivirus software.
>>>> https://www.avast.com/antivirus
>>>>
>>>
>>> _______________________________________________
>>> Sent via AMSAT-BB at amsat.org. AMSAT-NA makes this open forum available
>>> to all interested persons worldwide without requiring membership. 
>>> Opinions expressed
>>> are solely those of the author, and do not reflect the official 
>>> views of AMSAT-NA.
>>> Not an AMSAT-NA member? Join now to support the amateur satellite 
>>> program!
>>> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
>>
>> _______________________________________________
>> Sent via AMSAT-BB at amsat.org. AMSAT-NA makes this open forum available
>> to all interested persons worldwide without requiring membership. 
>> Opinions expressed
>> are solely those of the author, and do not reflect the official views 
>> of AMSAT-NA.
>> Not an AMSAT-NA member? Join now to support the amateur satellite 
>> program!
>> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb 
>