Rob, I’ve been able to extend the functionality of gr-uhd to include the enable
switch for each LO distribution port. Thank you for the information.
I am now having synchronization issues with the transmit stream in the
GNURadio. It appears as though the radio channels are not starting at the same
time. Are you aware of any commands that you’ve had to run from external
applications that ensure the start time for both transmitters is the same?
<end transmission>
> On Jan 14, 2022, at 17:30, Rob Kossler <rkoss...@nd.edu> wrote:
>
>
> Just 1x, I believe.
>
>> On Fri, Jan 14, 2022 at 5:27 PM Paul Atreides <maud.dib1...@gmail.com> wrote:
>> doing it now. is the LO frequency the carrier freq or is it 1/2 or 2x?
>>
>>> On Fri, Jan 14, 2022 at 5:03 PM Marcus D. Leech <patchvonbr...@gmail.com>
>>> wrote:
>>> On 2022-01-14 17:00, Paul Atreides wrote:
>>> > That's what I had originally.
>>> > i've Changed back to this and still getting no LED on the TX LO OUT0:
>>> > RF0
>>> > LO Source internal
>>> > LO export True
>>> > RF1
>>> > LO Source external
>>> > LO export False
>>> >
>>> > the generated flowgraph code looks to be reflecting is:
>>> > self.uhd_usrp_sink_0.set_clock_source('external', 0)
>>> > self.uhd_usrp_sink_0.set_time_source('external', 0)
>>> > self.uhd_usrp_sink_0.set_samp_rate(samp_rate)
>>> > self.uhd_usrp_sink_0.set_time_unknown_pps(uhd.time_spec(0))
>>> >
>>> > self.uhd_usrp_sink_0.set_center_freq(freq, 0)
>>> > self.uhd_usrp_sink_0.set_antenna('TX/RX', 0)
>>> > self.uhd_usrp_sink_0.set_gain(gain_0, 0)
>>> >
>>> > self.uhd_usrp_sink_0.set_lo_source('internal', uhd.ALL_LOS, 0)
>>> > self.uhd_usrp_sink_0.set_lo_export_enabled(True, uhd.ALL_LOS, 0)
>>> > self.uhd_usrp_sink_0.set_center_freq(freq, 1)
>>> > self.uhd_usrp_sink_0.set_antenna('TX/RX', 1)
>>> > self.uhd_usrp_sink_0.set_gain(gain_1, 1)
>>> >
>>> > self.uhd_usrp_sink_0.set_lo_source('external', uhd.ALL_LOS, 1)
>>> > self.uhd_usrp_sink_0.set_lo_export_enabled(False, uhd.ALL_LOS, 1)
>>> >
>>>
>>> I wonder if this is just a case of the LO export LED code isn't there in
>>> that version of UHD?
>>>
>>> Can you confirm presence of the LO signal with a spectrum analyser or
>>> similar?
>>>
>>>
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