How Can I Verify My FGEN Outputs?

How Can I Verify My FGEN Outputs?

Verifying DC Outputs

Use the digital multimeter (DMM) to verify DC outputs. A DMM has a high impedance input so the DC value measured should be 100% of the programmed value.

1. Attach the red probe to the DMM HI connector.
2. Attach the black probe to the DMM LO connector.
3. Launch the VirtualBench application.
4. Output a DC voltage from the FGEN in DC mode and turn the output on.
5. Configure the DMM for DC volts, auto range.
6. Simultaneously, touch the tip of the red probe to the center pin of the FGEN BNC connector and the tip of the black probe to the shield of the FGEN BNC.
7. The DMM should read the programmed voltage.

Verifying AC Outputs

Use the mixed signal oscilloscope (MSO) to verify AC outputs (sine, square, triangle waves). Make sure that the MSO has adequate bandwidth, otherwise you will see the amplitude decrease with frequency. Make sure that the oscilloscope probe is compensated properly.

1. Launch the VirtualBench application.
2. Plug the oscilloscope probe into an oscilloscope channel.
3. If you are using a switchable 1x/10x scope probe, move the slide switch on the probe to 10x.

   Note  Using the oscilloscope probe in 1x mode will have reduced bandwidth, which makes the signal amplitude look smaller at higher frequencies.

4. Ensure the probe attenuation setting for your channel is set to 10x
5. Connect the oscilloscope probe ground clip to the shield of the FGEN BNC connector.
6. Touch the tip of the oscilloscope probe to the center pin of the FGEN BNC.
7. Zoom in/out of the timebase and range to see the full signal on the oscilloscope channel you are verifying.

   Tip  You can also use the Auto Setup button.

8. Make sure the signal amplitude and frequency are what you expect.

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