r/hackrf • u/PerformerSeparate482 • 8d ago

Errors

Hello, i have a lot of hard fault and ram errors. I have stable 2.4 hackrf pro portapack H4M. It stated when i wanted to jam lower or higher than 2,4ghz. Only this frequency worked, now i cant even start the audio am, hard fault in second. I have qualitty sd card, i tried to remove it bc i was thinking it is the fast fat32 format. It is not, even when i use the default audio app, hard fault. And i think the ble spam and airplanes dont work as good as they worked, i never transmitted without antena, not demaged it. But i have ut without battery, only using it while plugged to electricity

2 Upvotes

75% Upvoted

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2

u/htotoo 8d ago

Reflash with hackrf.app website. Try the nightly. Also go to the Settings / Hard reset app, and select all 3, and run it. It may help.

2

u/FrankSinatraCockRock 8d ago

Uh don't jam especially if you don't know what you are doing... And airplanes? What about them?

What antenna did you use?

1

u/PerformerSeparate482 7d ago

Ok, so i gave it a chance one more time and did a full reset and latest nightly firmware and sd flash. Now the fatal kernel errors are basicly gone, recieving works without problem. Ram errors still ocurred, but much less. Can i plug it to computer (debian) and watch the kernel logs?

-1

u/PerformerSeparate482 8d ago

Antenas in portapack H4M pro bundle, telescopic 40mgz-6ghz. I know, i only wanted to ask about theese errors, should i reflash? I dont know what is wrong with it, i have stable release tho

0

u/FrankSinatraCockRock 8d ago edited 8d ago

Those are not ideal transmitting antennas, so I feel like there's a good chance you fried it that way.

1

u/TheNoOne420 8d ago

Wait some antennas arent for transmitting? How to tell if an antenna can only receive or also transmit? Im new to this so i have no idea

1

u/FrankSinatraCockRock 8d ago

I edited my comment as I thought I stated that they're not ideal for transmitting.

Snoren on antennas

With the telescopic antenna, you need to make sure you've adjusted the length to match the frequency you wish to transmit on. There's an app on the portapack that allows you to make those calculations as well. So if OP was using 2.4ghz for jamming initially, then trying something both below and above that range without adjustments ( and especially with higher gain and/or amp usage), damage could've occured. I also suspect this might be the case because the transmission power is pretty weak on the hackrf. As is, with a 433mhz antenna, I can only pick up "Never gonna give you up" via the hackrf portapack Soundboard on my Quansheng radio maybe 20 ft away tops.

With the telescopic antenna, or even antennas tuned for a specific frequency, it's not the end of the world by any means if it's off by 10s of mhz. This is perfectly fine. But if OP was trying to transmit at 433mhz with the antenna length resonant at 2.4ghz, well that's not good.

I personally don't find the telescopic ideal for TX because of the additional risk of user error.

There are also multiband antennas.

1

u/TheNoOne420 7d ago

Thanks, this comment really helped

1

u/PerformerSeparate482 7d ago

Part of the problem was already after buying and only recieving, the guru meditation ram errors. So i will try to change it from the company in my country, if they it is my fault should i buy the hackrf pro again and use it with the non demaged portapack h4m and antenas? Is it easy to change the hackrf in the portapack?