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50
P6330 3.5 GHz Differential Probe Instruction Manual
Offset Zero and DC CMRR
Use the following procedures to adjust the offset zero and DC CMRR
characteristics of the probe. Due to the interaction of the two
adjustments, it may be necessary to repeat the procedure to optimize
the adjustments.
NOTE. If your oscilloscope has a probe calibration routine, clear the
probe calibration constants at this time.
If the offset zero is adjusted, perform a functional check of the offset
range before closing the compensation box.
1. Connect the probe tips together using the square pin, Y-lead, and
KlipChip adapters.
2. Connect the probe as shown in Figure 18 on pa ge 41.
3. Set the Var/0v button on the 1103 power supply to 0v (light off).
The output offset voltage is displayed on the DMM.
4. Adjust Offset Zero for 0.00 V ±3mV,displayedontheDMM.
Record the actual value.
5. Connect the probe as shown in Figure 25 on pa ge 51. Monitor the
source voltage with the DMM.