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greatscottgadgets / hackrf

low cost software radio platform
https://greatscottgadgets.com/hackrf/
GNU General Public License v2.0
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HackRF crashes when close to transmitter? #573

Closed 25141928 closed 5 years ago

25141928 commented 5 years ago

I am using the HackRF to conduct training for a project and I am having issues recording the transmissions using multiple softwares! Main issue:

Steps to reproduce

  1. Transmit within 1 m of the hackrf

Expected behaviour

Hackrf records the transmission using URH software

Actual behaviour

The HackRF records the first couple of seconds and then crashes. Could the power of the transmitter be too much for the hackRF causing it to crash?

Version information

Kali Linux running updated version of hackrf purchased 2018

hackrf_info output:

Universal Radio Hacker Version: 2.5.4

mossmann commented 5 years ago

How do you know it has crashed? What are the symptoms?

Does the crash occur when the transmitter is not active?

25141928 commented 5 years ago

Thanks for replying. I should of been a bit more specific. When I transmit on the radio the software crashes when I am recording only and has to be restated. It happens on a couple of different softwares so the hack is the only single point between them. When I lower the power it doesn’t. Is this a safety feature of the hack if the power at the receive ae is too high?

I appreciate the reply. I was hoping to be able to speak to you about the project I am working on as part of my degree. We are using the hackrf to disrupt data communications using both record and replay and packet replication. I was hoping to discuss with you your thoughts and best methods for packet replication such as within gnu radio.

Your videos have been very useful. Thank you.

Regards

Sent using the GMX mail app

On 10/01/2019 at 18:15, Michael Ossmann wrote:

How do you know it has crashed? What are the symptoms?

Does the crash occur when the transmitter is not active?

-- You are receiving this because you authored the thread. Reply to this email directly or view it on GitHub: https://github.com/mossmann/hackrf/issues/573#issuecomment-453197838

mossmann commented 5 years ago

What is the output power of the transmitter? How close is it to the HackRF? Is it connected by cable? Antennas?

25141928 commented 5 years ago

It’s a couple of meters away on 15W high 5W low. Antenna only. Not cabled.

mossmann commented 5 years ago

It sounds like you may have exceeded the maximum input power of HackRF One which can cause permanent damage: https://github.com/mossmann/hackrf/wiki/HackRF-One#receive-power

I suggest cabling the transmitter to the HackRF One with an attenuator (50 to 80 dB) in between.

25141928 commented 5 years ago

Will do thank you for the information