On 02/19/2021 12:31 PM, Guillermo Gancio via USRP-users wrote:
Dear all,
I'm using a B205 as a CW signal generator with the example
tx_waveform, in general it works ok, but if I try to use a 10MHz
external reference (option --ref external) I got the error, same issue
if I replace the 10MHz with a PPS, (--pps external), power levels are
ok.
Checking TX: Ref: unlocked ...
Error: AssertionError: ref_locked.to_bool()
in int _main(int, char**)
at /home/ggancio/uhd/host/examples/tx_waveforms.cpp:285
This is with a fresh install
[INFO] [UHD] linux; GNU C++ version 7.5.0; Boost_106501;
UHD_4.0.0.0-93-g3b9ced8f
Any idea on this? Thank you very much!
Cheers.
You should probably check the quality of your 10MHz signal going into
the B210. I've used all kinds of external 10MHz references for B210
and it has never complained. 10MHz OCXO with a TTL buffer. Rubidium
clock with a TTL buffer. Octoclock-G. Never had a problem.
Check what your 10MHz signal looks like into a 50Ohm termination on a
good quality oscilloscope. Does it look reasonably pure, or are there
unwanted ringing artifacts?
If you're driving the reference input "too hard", you may be creating
unwanted spurs that confuse the reference PLL. Make sure the level
is not too "loud".
_______________________________________________
USRP-users mailing list
[email protected]
http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
