Hi Phil,
Yes, it was last night around midnight-thirty Central Time. I had done some earlier tries during the "warm up" testing last weekend in the daylight with no good result, though. I have switched the input to my Windows 7 PC and I will let it capture what it does tomorrow morning, to compare. Since the daylight passes will all be while I'm at work, perhaps I'll alternate between the Vista and the Windows 7 PCs during the week to see what I come up with.
Thanks and 73, Jerry N0JY
On 8/6/2011 2:17 PM, Phil Karn wrote:
On 8/6/11 9:31 AM, N0JY wrote:
I'm having trouble getting telemetry.
Jerry, is this a night-side pass with the satellite in low power mode? The coding is not optimal for a signal that's present only a small fraction of the time, as it takes 16.384 sec at AOS to "fill the pipe" in the de-interleaver used to combat fading. It's barely done that when the transmitter turns off again at 40 sec.
It works much better on the day-side passes with a continuous signal, even if it's fading deeply.
The CW beacon is 1 kHz below the (suppressed) carrier of the BPSK-1000 beacon. Make sure your radio is in USB mode and accurately tune the CW beacon so that it comes out at 500 Hz. This will center the BPSK at 1500 Hz. It extends from 500 to 2500 Hz (2 kHz total bandwidth) between spectral nulls. That's not much narrower than a regular SSB filter, so make sure your passband shift filter, if any, is set to pass it.
73, Phil
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