SDRPlay and IF Panadapter not working

[JPM]

Hi to all,

I am using a Yaesu FT-991A with panadapter and IF ouput (69,45MHZ). This works great with SDRplay UNO and HDSDR. However I cant get it to run with SDRAngel. What do I have to do? My Setup: Windows 11 (newest), SDRPlay API 3.15 and service active with an SDRPlayduo connected on ant1 to the ft991a panadapter. SDRAngel newest version so far. I experimented with the delta f settings in the sdrplay driver settings but cant get it to run - seems to me as if SDRAngel cant do the IF decoding. All API settings are the same as working under HDSDR.

Thanx and 73
Joerg

[srcejon]

Perhaps post a screenshot.

[JPM]

These pictures are my settings using the panadapter and the output of SDRAngel on 40m band receiving no signals:

SDRAngel_Panadapter_40m_API_IF_settings.jpg (18.89 KiB) Viewed 52177 times

SDRAngel_Panadapter_40m_API__settings.jpg (70.61 KiB) Viewed 52177 times

SDRAngel_Panadapter_40m.jpg (216.5 KiB) Viewed 52177 times

[JPM]

These pictures show the correct behavior with antenna connected direct to the SDRPlay duo without using the panadapter and disabled delta f settings. I can see normal band traffic:

SDRAngel_Antenna_40m_API_settings.jpg (66.65 KiB) Viewed 52177 times

SDRAngel_Antenna_40m.jpg (293.19 KiB) Viewed 52177 times

[JPM]

And these pictures of HDSDR show the working output of the setup with panadapter:

HDSDR_Panadapter_40m_API_IF_settings.jpg (89.84 KiB) Viewed 52177 times

HDSDR_Panadapter_40m_API__settings.jpg (169.89 KiB) Viewed 52177 times

HDSDR_Panadapter_40m.jpg (374.7 KiB) Viewed 52177 times

[srcejon]

What do you get if you set the SDRplay device frequency to the IF frequency 69.45 MHz - with 0 Delta Frequency.

[JPM]

A bit better output is seen on these pictures with lower gain ref settings:

SDRAngel_Panadapter_40m_low_gainref_settings.jpg (71.13 KiB) Viewed 52175 times

SDRAngel_Panadapter_40m_low_gainref.jpg (167.98 KiB) Viewed 52175 times

[JPM]

To me it looks like the whole band is only displayed on 69,45MHZ+7MHZ like the input from the panadapter is interpreted by SDRAngel as additive mixing and not multiplied mixing or vice versa.

[JPM]

OK, with no IF and on 69.450MHZ center frequency it looks better, however this is irritating to use (always calculate settings while using) and also offsets seem to be needed:

SDRAngel_Panadapter_40m_noIF_settings.jpg (69.3 KiB) Viewed 52175 times

SDRAngel_Panadapter_40m_noIF.jpg (590.9 KiB) Viewed 52175 times

[JPM]

And of corse its mirrored, the 40m band span goes from 69.25 to 69.45 MHZ: