Recording freq wrong in Automatic Schedule

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VE3HST
Posts: 15
Joined: Mon Oct 05, 2020 10:21 am

Recording freq wrong in Automatic Schedule

#1

Unread post by VE3HST »

Normally, as Automatic Schedule switches from satellite to satellite, the frequency in the waterfall and the spectrum changes to the upcoming satellite frequency. It works fine except for the first satellite. For the first satellite, the frequency that is used for the waterfall and the spectrum is the last frequency that was used the previous time that SDR Console was used and shut down. Turning the Automatic Schedule ON/OFF/ON doesn't help. So for the first satellite in the series, the IQ recording is centred on the wrong frequency even though the correct frequency is shown in the Receive sub-frame. Then when that IQ recording is played back, it is also centred on the wrong frequency and has to be changed to hear or record the audio. All that is quite inconvenient for the first satellite. For the following satellites, it works OK. It is just the first one after SDR Console is turned on.

The attached screenshot shows the situation for NOAA 19 and NOAA 15. I have the frequencies set as 137.125 and 137.645 (with a bit of a deliberate offset). But if NOAA 15 was used in a previous session of SDR Console using 137.645, that is the frequency that Automatic Schedule uses for whatever the first satellite after a restart is, in this case NOAA 19 which uses 137.125. So NOAA 19 gets recorded at the wrong frequency. Fortunately the bandwidth is wide enough that it is actually recorded but not centred in the waterfall, spectrum and recording. After the first satellite, all subsequent frequency changes operate correctly.
2021-07-12 137.645.jpg

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