Are using -c 127 as an argument for your testing. And -x goes from 0 to
47dB, why stop at 14dB ?
$ hackrf_transfer
receive -r and receive_wav -w options are mutually exclusive
Usage:
... snip ...
[-l gain_db] # RX LNA (IF) gain, 0-40dB, 8dB steps
[-g gain_db] # RX VGA (baseband) gain, 0-62dB, 2dB steps
* [-x gain_db] # TX VGA (IF) gain, 0-47dB, 1dB steps*
... snip ...
[-c amplitude] # CW signal source mode, amplitude 0-127 (DC
value to DAC).
... snip ...
$From https://github.com/mossmann/hackrf/wiki/HackRF-One#transmit-power you should be seeing about 15dBm that close to 10MHz It could be that you have damaged the TX amplifier, did you have -a 0 in your tests. Because if it is broken then it would probably act like an attenuator. Paul On 31/01/2015 12:43, Mark Jessop wrote: > Hi all, > > Bought a HackRF a few months back, never properly measured the output power > on it when I got it unfortunately, but it has certainly dropped at some > point in the last few months. > > I finally got the chance to put it on a spectrum analyzer the other day. > Transmitting a single carrier, I'm seeing a maximum of -30dBm output power > at 14MHz. Only a few dB difference noticed when turning the RF Gain setting > from 0 to 14dBm (This does actually do something, doesn't it?) > > Any thoughts? I have the facilities to replace QFN components if required... > > Cheers, > Mark VK5QI > > > > _______________________________________________ > HackRF-dev mailing list > [email protected] > https://pairlist9.pair.net/mailman/listinfo/hackrf-dev
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