Uplink Calibration in SatPC32
I've been learning to operate my station using SatPC32. I'm finding I need to constantly adjust my uplink calibration in the CAT Tuning menu or I start to lose myself. On the most recent pass of XW-2A it required adjustment of about 150 Hz over the duration. This seems like a lot to me - I know its normal to make fine adjustments at the beginning of a pass but thought I could then leave it. Is this normal or is something amiss?
If anything I suspect it is related to keps - I update these manually by going to Satellites and clicking Update Keps. Then selecting the nasa.all file and Download. Have I missed something?
Station details: Icom IC-9700 transceiver (firmware 1.21), SatPC32 version 12.8d, Windows 10. Crossed yagis on a G-5500 rotator, K3NG based interface.
Thanks in advance and 73, Alex VA3ASE
It happens with both Sat{C32 as well as HRD Satellite and gets really bad on higher passes.
73!Umesh, k6vug
On Thursday, April 23, 2020, 7:30:27 PM PDT, VA3ASE via AMSAT-BB [email protected] wrote:
I've been learning to operate my station using SatPC32. I'm finding I need to constantly adjust my uplink calibration in the CAT Tuning menu or I start to lose myself. On the most recent pass of XW-2A it required adjustment of about 150 Hz over the duration. This seems like a lot to me - I know its normal to make fine adjustments at the beginning of a pass but thought I could then leave it. Is this normal or is something amiss?
If anything I suspect it is related to keps - I update these manually by going to Satellites and clicking Update Keps. Then selecting the nasa.all file and Download. Have I missed something?
Station details: Icom IC-9700 transceiver (firmware 1.21), SatPC32 version 12.8d, Windows 10. Crossed yagis on a G-5500 rotator, K3NG based interface.
Thanks in advance and 73, Alex VA3ASE _______________________________________________ Sent via [email protected]. 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: https://www.amsat.org/mailman/listinfo/amsat-bb
Have you checked your system clock? Try https://time.is which is very accurate. Some computer clocks can drift badly, and this can cause the need for constant tweaking, even with very stable satellites.
73,
Alan WA4SCA
<-----Original Message----- <From: AMSAT-BB [mailto:[email protected]] On Behalf Of k6vug- <-- via AMSAT-BB <Sent: Friday, April 24, 2020 9:53 AM <To: AMSAT-BB [email protected]; VA3ASE [email protected] <Subject: Re: [amsat-bb] Uplink Calibration in SatPC32 < < <It happens with both Sat{C32 as well as HRD Satellite and gets really bad <on higher passes. < <73!Umesh, k6vug < < < < On Thursday, April 23, 2020, 7:30:27 PM PDT, VA3ASE via AMSAT-BB <amsat- [email protected] wrote: < < I've been learning to operate my station using SatPC32. I'm finding I need <to constantly adjust my uplink calibration in the CAT Tuning menu or I <start to lose myself. On the most recent pass of XW-2A it required <adjustment of about 150 Hz over the duration. This seems like a lot to me - <I know its normal to make fine adjustments at the beginning of a pass but <thought I could then leave it. Is this normal or is something amiss? < <If anything I suspect it is related to keps - I update these manually by <going to Satellites and clicking Update Keps. Then selecting the nasa.all <file and Download. Have I missed something? < <Station details: Icom IC-9700 transceiver (firmware 1.21), SatPC32 version <12.8d, Windows 10. Crossed yagis on a G-5500 rotator, K3NG based interface. < <Thanks in advance and 73, <Alex VA3ASE <_______________________________________________ <Sent via [email protected]. 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: https://www.amsat.org/mailman/listinfo/amsat-bb < <_______________________________________________ <Sent via [email protected]. 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: https://www.amsat.org/mailman/listinfo/amsat-bb
Hi Alex
Can you describe a bit more on how you do your calibration?
It works for me, but I had to do it for each satellite and then hit "Change/Store Data File", the hit the button under Store "Uplink Calibration".
It mostly works but I might still have to touch it up from time to time.
Mike va3mw
On Fri, Apr 24, 2020 at 11:16 AM Alan via AMSAT-BB [email protected] wrote:
Have you checked your system clock? Try https://time.is which is very accurate. Some computer clocks can drift badly, and this can cause the need for constant tweaking, even with very stable satellites.
73,
Alan WA4SCA
<-----Original Message----- <From: AMSAT-BB [mailto:[email protected]] On Behalf Of k6vug- <-- via AMSAT-BB <Sent: Friday, April 24, 2020 9:53 AM <To: AMSAT-BB [email protected]; VA3ASE [email protected] <Subject: Re: [amsat-bb] Uplink Calibration in SatPC32 < < <It happens with both Sat{C32 as well as HRD Satellite and gets really bad <on higher passes. < <73!Umesh, k6vug < < < < On Thursday, April 23, 2020, 7:30:27 PM PDT, VA3ASE via AMSAT-BB <amsat- [email protected] wrote: < < I've been learning to operate my station using SatPC32. I'm finding I need <to constantly adjust my uplink calibration in the CAT Tuning menu or I <start to lose myself. On the most recent pass of XW-2A it required <adjustment of about 150 Hz over the duration. This seems like a lot to me
<I know its normal to make fine adjustments at the beginning of a pass but <thought I could then leave it. Is this normal or is something amiss? < <If anything I suspect it is related to keps - I update these manually by <going to Satellites and clicking Update Keps. Then selecting the nasa.all <file and Download. Have I missed something? < <Station details: Icom IC-9700 transceiver (firmware 1.21), SatPC32 version <12.8d, Windows 10. Crossed yagis on a G-5500 rotator, K3NG based interface. < <Thanks in advance and 73, <Alex VA3ASE <_______________________________________________ <Sent via [email protected]. 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: https://www.amsat.org/mailman/listinfo/amsat-bb < <_______________________________________________ <Sent via [email protected]. 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: https://www.amsat.org/mailman/listinfo/amsat-bb
Sent via [email protected]. 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: https://www.amsat.org/mailman/listinfo/amsat-bb
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VA3ASE