De-sense after transmit

Tim ORourke

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Oct 15, 2025, 9:08:48 AMOct 15

to Radioberry

I am on RPi5 and after I transmit the receive sensitivity changes. Noise floor that was -110db drops to -130dB.

Don't believe I noticed this on RPi4.

Tim W4YN

Duane's Mind

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Oct 15, 2025, 9:19:34 AMOct 15

to Radioberry

I get this on the first transmission then after adjusting the RF level up again it works normally

Tim ORourke

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Oct 15, 2025, 10:15:08 AMOct 15

to Radioberry

Well at least I am not alone Hi! I found it the same on RPi4 or 5 no difference Tnx Tim

Tim ORourke

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Oct 21, 2025, 10:11:54 AMOct 21

to Radioberry

That is true but the rx signal strength is not displayed accurate after TX.

Seems like there should be a fix for this.

Tim

Ricardo Suarez

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Oct 21, 2025, 10:25:47 AMOct 21

to radio...@googlegroups.com

Same here...

Receiver works ok until first tx, then rx drops. Ajusting RX level returns to normal and then works ok until reboot

RPi4, DL1YCF pihpsdr branch

Rick LU9DA

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Mario Vano

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Oct 21, 2025, 8:59:02 PMOct 21

to Radioberry

Me too, it always has. I key up and reset the level right after starting to work around it, but I think it's a driver bug...

Quick does it too!

Neither does it if I connect to my Hermes instead...

Jatteau Marc

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Oct 22, 2025, 1:42:57 AMOct 22

to Radioberry

Hello everyone,
I'm also having the same desensitization problem.
My RP4/RadioBerry/LCD screen/HPSDR configuration
or RP4/RadioBerry/Thétis under Windows.
It's the same in both configurations.
Probably the RadioBerry or RP4 is the culprit.

73 F6GKG

Paulh002

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Oct 22, 2025, 4:08:59 AMOct 22

to Radioberry

How much does it drop? I am not having this issue. But I am using my own software and only the driver not the firmware (hpsdr service).

You can enable or check the driver monitoring to see what commands are send to the radioberry. If the gain changes there must be a gain command visible.

On Wednesday, 15 October 2025 at 15:08:48 UTC+2 Tim ORourke wrote:

Tim ORourke

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Oct 22, 2025, 8:04:50 AMOct 22

to Radioberry

drops by 20dB

Not sure how to monitor commands

Tim

pa3gsb

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Oct 22, 2025, 3:26:37 PMOct 22

to Radioberry

For rpi-4 i did an update in the firmware. is someone willing to test if this keeps the rx gain consistent.

73 Johan

PA3GSB

Op woensdag 22 oktober 2025 om 14:04:50 UTC+2 schreef tim....@gmail.com:

Tim ORourke

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Oct 24, 2025, 12:25:01 PMOct 24

to Radioberry

How about RPi 5, I have both 4 and 5 but 5 is current setup.

Tim

Duane's Mind

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Oct 26, 2025, 6:11:59 AM (13 days ago) Oct 26

to Radioberry

Thanks very much it's working fine now. Tested on Pi4 and Pi5

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