Synchronization of PXIe4305 with the chassis or an AO card

[arunpandey]

I have a PXIe-4305 installed in PXI 1073 chassis with PXIe-6738 in the same chassis. The PXIe-4305 does not support external clock. I wish to collect the data in PXIe-4305 in sync with an external clock which I am using with PXIe-6738 to generate ao signals. Is it possible to synchronise the data acquisition in PXIe-4305 with the same clock?

[santo_13]

These are very useful articles and given 4305 uses delta-sigma ADC I would assume the synchronization techniques will be similar to other Sound and Vibration cards (DSA)

Synchronization Basics - National Instruments 

Synchronization Explained - National Instruments

Refer to the topic "Synchronizing between Sample Clock and Oversample Clock Timed Devices" in the Synchronization Explained link

[arunpandey]

Thank your for your response. I still can't figure out how to sync the ai acquisition with the ao card which is receiving the external clock. The PXIe-4305 accepts a PXIe_Clk100 source only, which is 100 MHz reference clock. My external clock is 10 MHz being fed into PFI1 of PXIe-6738.

Is it possible for the PXIe-4305 to be synced with the PXIe-6738 clock and ultimately with the external clock with such a setup?

[arunpandey]

btw to do the synchronization, I am using the following example - https://github.com/ni/nidaqmx-python/blob/master/nidaqmx_examples/ai_multi_task_pxie_ref_clk.py

[santo_13]

Unfortunately, none of the cards with Delta-Sigma Data converter can take in an external clock due to the ADC/DAC architecture. You've to do the other way around, you've to export the 4305 sample clock to 6738 for synchronization (oversampled clock device is 4305 and sample clock device is 6738)

Edit: incorrect image, hence removed

And for synchronization between that two 4305 you've to use the Reference clock synchronization along with the Sync Pulse technique as depicted in the image below (once of the 4305 will be designated as master and the other as slave),