On 22/02/2023 18:14, Jones, James (jtjones49) wrote:
Hello, I have a USRP x300 and I am trying to use the GPS module for
clock sync. I am running Ubuntu 20 and am using external GPS antennas
and am using GNUradio version 3.10.5.1 . I have the following
arguments for the USRP source block:
Sync: Unknown PPS
Time Source: Default
Clock Source: O/B GPSDO
However, when running this block I get the following error:
Traceback (most recent call last):
File "/home/.../Documents/test.py", line 290, in <module>
main()
File "/home/.../Documents/test.py", line 268, in main
tb = top_block_cls()
File "/home/.../Documents/test.py", line 92, in __init__
self.uhd_usrp_source_0_0.set_clock_source('gpsdo', 0)
RuntimeError: RuntimeError: Reference Clock PLL failed to lock to
gpsdo source.
Any help is appreciated and thank you to Marcus Müller for helping me
resolve the incompatibility with the USRPs.
James Jones
Oh, also, if there's a source connected to the external REF IN
connector, try disconnecting it. On at least *some* hardware
versions the external clock input can interfere with the on-board
GPSDO clock.
