The problem: UHF Satcom reception always was very well with Winradio RX. UHF antenna and preamp gave good results. Reception was towards 15W, partly 60 east.I have now moved to a high-rise building on the top floor with a clear view of the east and partly South. Same configuration as before facing east. and now? 0 reception. I can turn the antenna but always bad reception. A bit of 250.55 can be seen. Now, as a test, instead of the PC, I connected a tablet with Airspy to the same configuration and i have a great reception. Tried Airspy on the PC. Zero reception. Only works with a tablet. Does anyone have an answer to this strange behavior?
Issues UHF Satcom reception
- Thread starter keyhole
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Ubbe
Member
How do you receive other frequency bands? Compare tablet to PC. What do you see on the spectrum using Airspy when looking at the UHF SAT band and in other frequency bands?
Problem solving continuos after you know if all frequencies are dead using the PC or only UHF-SAT.
/Ubbe
Problem solving continuos after you know if all frequencies are dead using the PC or only UHF-SAT.
/Ubbe
prcguy
Member
You might be getting interference or stronger signals on other frequencies which are overloading the receivers or the preamp. Do you have a band pass filter in front of the preamp for only the UHF satcom range of about 243 to 270MHz?
Ubbe
Member
If one control device, the tablet, works fine to receive then it is not the receiver, overload, or intermod or any other RF issue with the actual reciever.
If other frequencies are ok, not degraded at all, remember that uhf-sat are probably the weakest signal you receive, then it has to be a setting that the config in the PC are set to that makes this happen. A gain value or attenuation that are enabled or perhaps a filter in the receiver or if several antenna ports exists it is using the wrong one for that band.
Check your PC's config for the receiver. But confirm that other frequencies are received at the exact same strenght on both tablet and PC.
/Ubbe
If other frequencies are ok, not degraded at all, remember that uhf-sat are probably the weakest signal you receive, then it has to be a setting that the config in the PC are set to that makes this happen. A gain value or attenuation that are enabled or perhaps a filter in the receiver or if several antenna ports exists it is using the wrong one for that band.
Check your PC's config for the receiver. But confirm that other frequencies are received at the exact same strenght on both tablet and PC.
/Ubbe
royldean
Member
Use the tablet to receive, then turn on the the PC. Does your RX quality get worse? If yes, then maybe your PC is "noisy".
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I hope you have double checked the sets on both computers for the software (presumed to be SDRSharp or may be HDSDR with the airSpy plug-in. I suspect you have a setting different on one from the other. If not, what happens using other software.
Check that spyverter isn't checked.
Hooligan
Member
Do you see anything on the waterfall displays in the 360MHz area?
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