Tektronix P5200A Instruction Manual page 68

Adjustments
DC CMRR
WARNING. Dangerous voltages will be present on the calibration generator output terminals and connection cables. Always
verify that the generator is in the standby mode before you make any connections to the generator.
1. Verify that the generator output is off.
2. Connect both of the probe inputs to the red (+) banana connector on the front output terminals of the generator. Use a
BNC-banana adapter if necessary.
3. Set the sine wave output of the generator to the voltage and frequency listed in the table. (See Table 17 on page 50.)
4. Set the oscilloscope horizontal to 10 ms/div.
5. Set the probe attenuation to the lower (most sensitive) range of the probe.
6. Enable the generator output. Set the oscilloscope vertical to display the signal. For a stable display, connect the
generator Sense output to another channel and trigger off of that channel.
7. Using the narrow-bladed tool, adjust the DC CMRR pot in the probe to minimize the amplitude of the waveform displayed
on the oscilloscope. Use averaging or hi-res filters to make viewing the 40 Hz signal easier.
WARNING. Use only an insulated tool to make the adjustment. Failure to do so presents a potential shock hazard.
8. Disable the generator output.
49 P5200A Series High Voltage Differential Probes Instruction Manual