Hi Jay,
In Multisim, you can use the probe or frequency counter to read signal frequency, but once you use any of the analysis such as transient, the option to find frequency is not available.
What you can do is use LabVIEW to control Multisim and there is a pre-built function available that can calculate a signal frequency. To make this work, you need LabVIEW and the LabVIEW Multisim API Toolkit which can be downloaded from the links below:
https://lumen.ni.com/nicif/us/evalmultisimtlkt/content.xhtml
https://lumen.ni.com/nicif/us/evaltlktembdes/content.xhtml
Once you install the required software, in LabVIEW you can create a VI (a program) to launch Multisim, run a circuit 200 times and each time change component values and calculate the output frequency for each run.
Attached is a sample circuit and the VI I created. Double click on the Reading Signal Frequency.vi file, click on the folder in the front panel (the screen with the grey background) and select and select the Multisim circuit which is attached. In this program, I am changing a resistor R1 in the Multisim circuit and run the simulation 10 times, once finished, the result will appear in the array in the front panel.
You can use this example and modify the VI for your circuit.
Tien P.
National Instruments
