Measuring Conduction Delay Using the AD2

[Ryne Horn]

Hello again!

I'm trying to use the AD2 to act as both a signal source (wavegen1) and a measurement (scope1) device for the purpose of tracking conduction delay of the signal.  Currently, I simply have the wavegen1 connected directly to scope1 with 3 cycles of a sine wave being put out.  I am aware of the measure command to find the maximum on my scope1 but I was wondering if there was a way to find N (3 in my case) maximums AND find the corresponding times with respect to the timing of wavegen1? I plan to assume the timing of the wavegen1 is relatively accurate to my input frequency and can find the theoretical maximum thus having the initial time from which to subtract from my scope1 maximum times.

Code thus far

function doPing(){
print("Amplitude and Time Delay Recorded");

// User Inputs
var Freq = 5e3;
var Amp = 1.0;
var N = 3;

// WaveGen Settinngs
Wavegen1.Synchronization.text = "Synchronized";
Wavegen1.States.Trigger.text = "None";
Wavegen1.States.Wait.value = 0;
Wavegen1.States.Run.value = N/Freq;
Wavegen1.States.Repeat.value = 1;

Wavegen1.Channel1.Mode.text = "Simple";
Wavegen1.Channel1.Simple.Offset.value = 0.0;
Wavegen1.Channel1.Simple.Amplitude.value = Amp;
Wavegen1.Channel1.Simple.Frequency.value = Freq;

// Scope Settings
Scope1.Trigger.Trigger.text = "Repeated";
Scope1.Trigger.Type.text = "Auto";
Scope1.Trigger.Source.text = "Wavegen 1";
Scope1.Trigger.Condition.Text = "Rising";
Scope1.Trigger.Level.value = Amp/2;

// Start instruments
Scope1.run();
wait(0.1);
Wavegen1.run();

// Measure
var maximum = Scope1.Channel1.measure("Maximum");
print(N+" Max: "+maximum+" V"); //Want to do for 1:N and get time and amplitude with relation to time zero being the zero of the wavegen

//Close out instruments
Scope1.stop();
Wavegen1.stop();
}
if(!('Wavegen1' in this) || !('Scope1' in this)) {
throw("Please open a Scope and a Wavegen instrument");
}
doPing();

 

[attila]

HI @Ryne Horn

For this purpose you should use the Network Analyzer which uses FFT that provides accurate phase measurement.

[Ryne Horn]

That did it.  Thanks!