Thanks Rob, I was actually wondering that!

<end transmission>

> On Jan 14, 2022, at 09:26, Rob Kossler <rkoss...@nd.edu> wrote:
> 
> 
> Forgot to mention, there are some nice LEDs on the LO Tx Outputs that will 
> tell you if you have a given port enabled.
> 
>> On Fri, Jan 14, 2022 at 9:25 AM Rob Kossler <rkoss...@nd.edu> wrote:
>> Hi Paul,
>> Based on the block diagram, I think I would set both LOs to use an external 
>> source. I would set the Tx0 export the LO on Tx Output 0 and then route it 
>> directly back into Tx Input 1 which then goes to a 1:2 splitter to feed both 
>> inputs.  In addition to exporting the LO and setting the LO source to 
>> external for both ports, you also need to enable the Tx Output 0 (disabled 
>> by default). I've forgotten the command to do so.
>> Rob
>> 
>> 
>> 
>>> On Fri, Jan 14, 2022 at 1:11 AM Paul Atreides <maud.dib1...@gmail.com> 
>>> wrote:
>>> I am trying to configure the N321 to take some TX phase measurements 
>>> between RF0 and RF1 
>>> I have updated the file system to the latest release using the KB guidance. 
>>> 
>>> My host/software side is:
>>> GNURadio 3.9.5
>>> UHD 4.1.0.5
>>> Ubuntu 20.04
>>> 
>>> My gr-uhd block has the LO settings:
>>> Channel 0 export = true
>>> Channel 0 LO = internal
>>> 
>>> Channel 1 export = false
>>> Channel 1 LO = external
>>> 
>>> On the hardware side am I understanding the LO diagram correctly that in 
>>> order to achieve the highest phase accuracy between channels i need to 
>>> share the LO between the transmit ports of RF0 and RF1? 
>>> If so, would I do that by physically connecting the TX LO OUT0 (really 0-3) 
>>> to TX LO IN1? 
>>> 
>>> Am I missing anything obvious for the settings and/or is there a more 
>>> desirable way to do this?
>>> 
>>> Thanks
>>> 
>>> <end transmission>
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