Someone operating outside the NB transponder range?

PA1EJO · Jun 22nd 2021

Details are in the image, see the signal around 433 MHz which I don't understand. Is this possible?

HB9SKA · Jun 23rd 2021

What is your transponder downlink QRG ? Your IF does not matter.

PA1EJO · Jun 24th 2021

433.500 to 434.000 MHz is the NB transponder tuning range, the anomaly shown is 500 kHz below the lower beacon, so at 433 MHz.

DB2OS · Jun 24th 2021

If you put your hand in front of the LNB, is the carrier still there?

73s Peter

PA1EJO · Jun 24th 2021

If afraid that is not something I can easily test since the antenna is 10m away outside point to QO100 over a garage roof, normally I don't see any signal outside the NB transponder band.

HB9EKO · Jun 24th 2021

Proposal for testing: Install Teamviewer on your cell phone and PC, then you can monitor the signal while standing next to the dish. I always point my dish that way when I change it from parking position to operating position

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