[amsat-bb] Re: AO-51 adjustments
glasbrenner at mindspring.com
Mon Jun 22 07:44:44 PDT 2009
TXa refers to the 435.150 downlink, and TXb to 435.300, regardless of the
uplink or configuration. The power levels should be roughly the same for
73, Drew KO4MA
----- Original Message -----
From: <n3tl at bellsouth.net>
To: "Gould Smith" <gouldsmi at bellsouth.net>; <amsat-bb at amsat.org>
Sent: Monday, June 22, 2009 10:40 AM
Subject: [amsat-bb] Re: AO-51 adjustments
> Thanks for the information Gould.
> Will you clarify, please, that TXA is the normal U/V configuration - and
> also that these are the power levels we can expect for Field Day? That's
> what I understand from your comments.
> Thank you, and thanks for all your efforts to keep AO-51 functioning as
> best as it can given the issues you have to address.
> 73 to all,
> Tim - N3TL
> -------------- Original message from "Gould Smith"
> <gouldsmi at bellsouth.net>: --------------
> I am working with the satellite to get the Field Day configuration
>> long term.. I turned TXB back on during the 1300Z pass.
>> During this pass I adjusted the TX levels to TXA 240 mW and TXB 290 mW.
>> These are lower power levels than I have ever used before, but necessary
>> to get the satellite through the 16+ minute eclipses each orbit. The SQRX
>> receiver uses
>> about 110 mA that must be subtracted from the total TX power used.
>> I think I am close and expect to get the correct settings over the next
>> 24 hours. It is also necessary to change the L/U analog operation to
>> digital over the eastern US in order to download the telemetry to see how
>> the satellite is
>> performing over multiple orbits.
>> Gould, WA4SXM
>> AO-51 Command Station
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