Hi,

20 and 10dB gain are very low on a B210. See uhd_usrp_probe to see the possible 
gain ranges!

Best regards,
Marcus

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On 27.02.23 16:27, oiu13q2t5pibtq1--- via USRP-users wrote:

I have 2 B210 with VERT2450s (i.e. 2.4/5 GHz antennae) and compiled uhd from 
source

|[INFO] [UHD] linux; Clang version 14.0.0 ; Boost_107400; 
UHD_4.4.0.0-0-g5fac246b|

Following the USRP Guide https://kb.ettus.com/Verifying_the_Operation_of_the_USRP_Using_UHD_and_GNU_Radio, I checked:

|/usr/lib/uhd/examples/benchmark_rate --rx_rate 10e6 --tx_rate 10e6|

on both SDRs

which yielded

|Num received samples: 100243473|

|Num dropped samples: 0|

|Num overruns detected: 0|

|Num transmitted samples: 100064040|


Now I tried to receive signals generated the other via

SDR1: RX:

|/usr/lib/uhd/examples/rx_ascii_art_dft --freq 4996e6 --rate 5e6 --gain 20 --bw 5e6 --ref-lvl -30|

SDR2: TX:

|/usr/lib/uhd/examples/tx_waveforms --freq 4996e6 --rate 5e6 --gain 10|


I would expect a peak somewhere around 4996 MHz; I only see noise which is not affected by the |tx_waveforms |call

The SDRs are in the same room.

The TX LED is red, the RX2 LED is green, indicating that they are indeed sending and receiving


Am I missing something important here?!


How can I solve that basic task?


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