How to control voltage output on ZMOD DAC1411 Using Digilent IP ZMOD?

[afif.ramadhan]

I am currently using eclypse Z7 its Zmod DAC to generate signal. This is the IP I am using, and the IP is recently updated on github (around 20th October 2021).

Based on the documents provided here, it is told that the expected data input is converted from volt with this equation

The docs said that

• CA = factory calibration raw additive constant (for the appropriate channel and gain).
• CG = factory calibration raw gain constant (for the appropriate channel and gain).

I have check the CA and CG in petalinux using

# decutil enum

and calculated the numbers. Thus I put it in the data through AXI stream using in this configuration

While it does outputting something, it is not what I intended to be. Can anyone tell me the correct way to use the IP?

Edited November 10, 2021 by afif.ramadhan
clarify

[JColvin]

Hello @afif.ramadhan,

I have reached out for some more feedback from another engineer more familiar with the Zmod IPs about this.

Thank you,
JColvin

[Ana-Maria Balas]

Hello @afif.ramadhan,

I think the parameters are already computed using decutil. See below Quote and example from the IP documentation pdf:

Quote

Decutil reports the factory raw calibration parameters and processed calibration parameters as shown in
Figure 3.

 

You only have to take the processed calibration values using decutil and feed them to the Zmod AWG controller IP. You can load the values using the IP interface or using the external calibration signals through Constant IP blocks.

Just to clarify something, through AXI Stream only the sample DATA is sent, not the calibration data.

 

Edited November 15, 2021 by Ana-Maria Balas