channel configuration in ADRV9002 while changing internal LO

Question

Hi , 
 As mentioned in the user guide UG-1828 is - "when changing the LO, user needs to make sure all channels that utilize the LO is configured. For example, if Tx1 and Rx1 are using LO1, and user wants to change LO1, then user needs to configure both Tx1 and Rx1 to achieve that. If all channels (Tx1 Tx2 Rx1 Rx2) are using the same LO, and user needs to change the LO, then user needs to configure all channels (Tx1 Rx2 Rx1 Rx2) to achieve that." 
 Here what is meant by "configuring both Tx1 and Rx1 while changing LO "which configuration we need to take for TX1 and Rx1. please elaborate or clarify. 
 
 regards, 
 manideep

M_Bugajski · Accepted Answer

Hi Manideep,

When the LO is changed, any channel using that LO must also change. For example, if Tx1, Rx1, Tx2, and Rx2 are all using the same LO at 2.5 GHz, and you wish to change Tx2 and Rx2 to 2.4 GHz instead, changing the LO to accommodate these will also affect channels Tx1 and Rx1.
Because you're using the same LO, you cannot change Tx2 and Rx2 without reconfiguring Tx1 and Rx1 to work with the new frequency.

I hope this helps.

Kind Regards,
Michał

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channel configuration in ADRV9002 while changing internal LO