How to set up DELAY MEASUREMENT FUNCTION using DPO3034 Tektronix Oscilloscope

[Geng]

Hi,

I am trying to measure DELAY between 2 waveform... The delay measurement should be from the first falling edge of channel1 to the first rising edge of channel 2.

Manually there is a configuration on setting this measurement (measurement should be from the first falling edge of channel1 to the first rising edge of channel 2).

However, I cant find this configuration on the instrument driver that I have for DPO 3034 oscilloscope.

With this, please kindly help and check my code.. Is there any driver or configuration that I need to add?

BTW, I attached my script for your reference.

Thank you.

[Geng]

Hi,

I just attached an additional information regarding  the instrument driver that I need.

The two photos attached are the manual configuration of the DELAY measurement in which I cant find/ configure in my current script.

Thank you.

[Dennis_Knutson]

I don't understand your question. The Read Measurement Function does have a delay function.

[Geng]

Hi Dennis,

Thanks for the quick response.

Regarding my query, basically my problem is how to measure the time between the first falling edge of channel 1 to the first rising edge of channel 2?

By manual operation of the DPO3034 oscilloscope, I can measure it by configuring/clicking the ADD measurement function then I will choose DELAY then I will configure DELAY measurement as first falling edge of channel 1 to first rising edge of channel 2.

But I cannot do this configuration thru my VI.. I am not sure if there is additional configuration or instrument driver that I need to add to make my VI works for this specific function.

BTW, I attached a photo of the actual waveform that I need to measure..Including its actual time measurement... for your reference..

Thank you.

Geng

[Dennis_Knutson]

I understand now. I don't see anything either to configure channel 1 for a falling edge. It may be buried someplace. You should look up the commands in the manual and do a search text to see if they are there. If not, just implement them with a VISA Write.

[crossrulz]

Digging through the drivers, I didn't see where you could set the rising/falling of the edges.  You need to look up the command set and build your own command to setup a measurement.  I created a driver for the TDS3000, which should at least be similar in syntax (I would expect the same).  Here's the commands I used. Tweak as needed.

:MEASU:MEAS1:TYP DELAY; //sets measurement 1 as a delay
SOURCE1 CH1; //set the first source (start edge's source)
SOURCE2 CH2; //set the second source (end edge's source)
DEL:DIRE FORW; //Use the first edge
EDGE1 RIS; //start with rising edge of source1
EDGE2 FALL; //end with falling edge of source2
:MEASU:MEAS1:STATE ON; //turn the measurement on

[Geng]

Hi Dennis & Crossrulz,

Thanks for the help & suggestions.

BTW, we were able to resolve our problem through elapse time function.

From our script, we do the tracking of the first instance that the channel 1 becomes 0V and the first instance that the channel2 becomes 5V.

Those instances represent our first falling edge for channel 1 and first rising edge for channel2.

Then we get the elapse time inbetween these two instances.

Thanks

Geng