New HackRF Pro not TX'ing

[eimann]

What outcome were you hoping for?

Hi,

I'm trying to TX with a HackRF Pro, I tried 20, 80, 800 MHz over a 50m antenna cable connected to a One.
When I TX on the One, the Pro receives it fine, when I do it the other way, the One doesn't receive the TX.

My Pro looks like this:

hackrf_info
hackrf_info version: 2026.01.3
libhackrf version: 2026.01.3 (0.9.2)
Found HackRF
Index: 0
Serial number: 0000000000000000645061de25368a13
Board ID Number: 5 (HackRF Pro)
Firmware Version: 2026.01.3 (API:1.10)
Part ID Number: 0xa0000a30 0x005d4f4e
Hardware Revision: r1.2
Hardware appears to have been manufactured by Great Scott Gadgets.
Hardware supported by installed firmware:
    HackRF Pro
This device is on its own USB bus.

Firmware from #1696

> hackrf_info
hackrf_info version: 2026.01.3
libhackrf version: 2026.01.3 (0.9.2)
Found HackRF
Index: 0
Serial number: 0000000000000000645061de25368a13
Board ID Number: 5 (HackRF Pro)
Firmware Version: git-0ea91e2f (API:1.09)
Part ID Number: 0xa0000a30 0x005d4f4e
Hardware Revision: r1.2
Hardware appears to have been manufactured by Great Scott Gadgets.
Hardware supported by installed firmware:
    HackRF Pro
Self-test FAIL:
Mixer: RFFC5072, ID: 4416, Rev: 1
Clock: Si5351, Rev: 1, readback: OK
Transceiver: MAX2831, RSSI mux test: PASS
FPGA configuration: PASS
FPGA SPI: PASS
SGPIO RX test: PASS
Loopback test: PASS
 0:1024,1024,59,58,1266,1284
 1:1023,1025,58,56,1321,1332
 2:4080,4079,51,49,920,927
 3:0,0,7,4,27,5
This device is on its own USB bus.

Any Idea what I'm doing wrong?

What outcome actually happened?

TX should work.

What operating systems are you seeing the problem on?

macos, linux

What is the output of hackrf_info?

hackrf_info version: 2026.01.3
libhackrf version: 2026.01.3 (0.9.2)
Found HackRF
Index: 0
Serial number: 0000000000000000645061de25368a13
Board ID Number: 5 (HackRF Pro)
Firmware Version: 2026.01.3 (API:1.10)
Part ID Number: 0xa0000a30 0x005d4f4e
Hardware Revision: r1.2
Hardware appears to have been manufactured by Great Scott Gadgets.
Hardware supported by installed firmware:
HackRF Pro
This device is on its own USB bus.

Are you using any third-party software?

No

Are you using any third-party hardware?

No

[eimann]

Nevermind, after reflashing firmware it works again, however I'm seeing a weird spur at 20 MHz and some kind of harmonic at 24 MHz?

[eimann]

Ah yes, should post hackrf_debug -t ...

> hackrf_debug -t -d 0000000000000000645061de25368a13
Self-test result: PASS
Mixer: RFFC5072, ID: 4416, Rev: 1, Locks: 111 (PASS)
Clock: Si5351, Rev: 1, readback: OK
Transceiver: MAX2831, RSSI mux test: PASS
FPGA configuration: PASS
FPGA SPI: PASS
SGPIO RX test: PASS
Loopback test: PASS
 0:1024,1024,58,56,1261,1275
 1:1025,1024,58,55,1338,1349
 2:4079,4080,50,48,895,885
 3:2,2,16,36,27,5