FM reception

[IU2KAC]

I'm using Adalm Pluto with SDR Console v3.4.
I receive N-FM signals perfectly, but I can't receive commercial FM radio (88-108 MHz).
I'd appreciate any suggestions, thanks.

[Max]

I'm using Adalm Pluto with SDR Console v3.4.
I receive N-FM signals perfectly, but I can't receive commercial FM radio (88-108 MHz).
I'd appreciate any suggestions, thanks.

Most common issue is the use of the incorrect mode. For FM broadcast radio, the mode should be "BC-FM" not WFM.

Is it this?

Max

[IU2KAC]

I'm using Adalm Pluto with SDR Console v3.4.
I receive N-FM signals perfectly, but I can't receive commercial FM radio (88-108 MHz).
I'd appreciate any suggestions, thanks.

Most common issue is the use of the incorrect mode. For FM broadcast radio, the mode should be "BC-FM" not WFM.

Is it this?

Max

No, that's not the problem.
I'll send you screenshots.img

[Max]

No, that's not the problem.
I'll send you screenshots.img

Can you please scroll down the RX DSP panel to show the Pluto radio settings panel and then re-post another screenshot.

You can attach the screenshot on this group instead of a link.

Have you completed the frequency extension modification to the Pluto firmware? Otherwise it will not receive below 325 MHz:

https://www.youtube.com/watch?v=g1jIAh6fG_A

Max

[IU2KAC]

No, that's not the problem.
I'll send you screenshots.img

Can you please scroll down the RX DSP panel to show the Pluto radio settings panel and then re-post another screenshot.

You can attach the screenshot on this group instead of a link.

Have you completed the frequency extension modification to the Pluto firmware? Otherwise it will not receive below 325 MHz:

https://www.youtube.com/watch?v=g1jIAh6fG_A

Max

I did the frequency extension modification, but the problem was not solved!?..

[IU2KAC]

No, that's not the problem.
I'll send you screenshots.img

Can you please scroll down the RX DSP panel to show the Pluto radio settings panel and then re-post another screenshot.

You can attach the screenshot on this group instead of a link.

Have you completed the frequency extension modification to the Pluto firmware? Otherwise it will not receive below 325 MHz:

https://www.youtube.com/watch?v=g1jIAh6fG_A

Max

I did the frequency extension modification, but the problem was not solved!?..

https://files.fm/u/8mnqfjyk7m

[Max]

I did the frequency extension modification, but the problem was not solved!?..

https://files.fm/u/8mnqfjyk7m

Sorry Liborio. I am not a Pluto user. Anything I do know is what I have read about on here. Your screenshot shows the Pluto working just fine on 70cm band (as you said).

Hopefully some other Pluto users can read this and take a look at your Radio panel settings and suggest something. Personally I don't see anything obvious.

When you tried for BC-FM you did have a resonant antenna on the antenna input I guess? Wire dipole cut for around 90MHz for example?

Max

[IU2KAC]

I did the frequency extension modification, but the problem was not solved!?..

https://files.fm/u/8mnqfjyk7m

Sorry Liborio. I am not a Pluto user. Anything I do know is what I have read about on here. Your screenshot shows the Pluto working just fine on 70cm band (as you said).

Hopefully some other Pluto users can read this and take a look at your Radio panel settings and suggest something. Personally I don't see anything obvious.

When you tried for BC-FM you did have a resonant antenna on the antenna input I guess? Wire dipole cut for around 90MHz for example?

Max

Yes, of course, I had an external antenna connected.
With an RTL dongle, however, the FM band 88-108 MHz can be received easily.

[Max]

https://files.fm/u/8mnqfjyk7m

When you tried for BC-FM you did have a resonant antenna on the antenna input I guess? Wire dipole cut for around 90MHz for example?

Max

Yes, of course, I had an external antenna connected.
With an RTL dongle, however, the FM band 88-108 MHz can be received easily.

Understood. This needs an experienced Pluto user. Will try and get Sigi DG9BFC to come and look here.

Max

[G8VLR]

Hi Liborio,

The device is capable of operating from 70 MHz to 6 GHz, which includes the standard FM broadcast band of 88–108 MHz, though it requires a firmware modification to unlock this range. By default, the PlutoSDR is limited to a narrower frequency range (e.g., 225 MHz to 3.8 GHz), but this can be expanded using a "hack" that reconfigures the device’s firmware to support the AD9364 RFIC, enabling reception down to 70 MHz.

Hope this helps,

Roger (G8VLR)