Synchronization of VST: Ok with RFSG, problem with DAMA

Hi all

We strive to synchronize 2 VSTs (5644) with DAMA OR and NI RFSG.

So far, we have been able to sync the RF Transmission of the VST 2 with RFSG, down a less than 100ps difference. It's excellent!

But we have not been able to renew this success with DAMA: we have time differences in the order of between 2 VST 100us.

We believe that we follow all the indications of the documentation of DAMA, as shown here:
http://zone.NI.com/reference/en-XX/help/372058N-01/vstdevices/5644_rfsa_gsynchronizing_clock_signals...
We ensure same buffers are empty at the beginning of the acquisition by manually empty the VST buffer before calling RFSAInitiate.

NOTES:

Our application is coded in C++ only.

We do not and cannot share the LOs between 2 VSTs, as we Rx/Tx at different frequencies.

Does anyone have an idea of what we could try?
We attached the sign of e/s OR our acquisition. Please, let us know if you see something wrong.

We use DAMA 14.5
SMU-8135 controller, Win7 x 64
SMU-1075 chassis.
SMU-5644R in the location #2 and #6

Best regards
Serge

Hi all

Finally, support (Kevin Sooch) helped us to solve the problem:

Tags: NI Products

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