Can I program PF1 to record a phase reference

[alex.]

We are trying to use USB DAQ 5133 to collect single pulse waveform around 5us duration.

Beside the single pulse waveform, we also need to know the time phase of the pulse referring to a 50Hz time reference.

Originally, we make it as below 

- CH1, random single pulse signal input, record pulse waveform, trigger by voltage level.

- CH2 a standard reference 50Hz waveform as attached.

-When triggered by CH1, it will record data for both channels of CH1 and CH2. From CH2, we can convert the amplitude value to the phase time as the drawing. So CH2 2 provides us the phase info.

Now we have to improve the system, since we have one more signal input. Can we use the PF1 for the 50Hz trigger and somehow use any internal counter in 5133 or PC to provide the pulse's phase time, then the CH2 will be saved for use as another signal input. Or can we record the trigger timestamp of PF1 and pulse seperately. Then we can get the phase time by their time difference. 

We do not want to collect every 20ms data to get the phase time, since 5133 transfer back slowly through USB and may not be able to collect 20ms cycles continuously.

Any suggestion or may we discuss about it? 

With Best Regards,

Yu Ming

[Meadow]

Hello Yu Ming,

If you refer to the specification documents of USB 5133, you can see that the PFI1 of the device accept pulse input as a trigger and external sample clock or pulse output as event generator.

Hence, it is not possible to use the PFI 1 channel as reference signal that you mentioned in the previous post.

Regards.

James

[alex.]

Just want to know the time difference between the trigger of the signal and the trigger of the reference. That is the phase info actually.

So just wonder if any hardware in 5133 can be used, and counter or locker.

Thanks,