Tektronix P5200A Instruction Manual page 64

Adjustments
Offset Zero
This procedure is identical for three of the probes. The fourth probe (P5200A) only uses a digital control for offset, so
there is no hardware adjustment.
For probes with serial numbers C199999 and below, Offset Zero is the only adjustment that can be done to the probe.
For probes with serial numbers C020000 and above, Offset Zero is the only adjustment that can be done without
removing the back label.
The adjustment for each range is independent and does not interact between the ranges.
1. Set the oscilloscope offset to 0 volts.
2. Connect the probe inputs together with the hook tips.
3. This step only applies to P5202A, P5205A, and P5210A probes. Using an insulated adjustment tool, center the OFFSET
ADJUST pot in the probe comp box.
4. Press and hold the probe BANDWIDTH and ATTENUATION buttons until the OVERRANGE LED on the probe flashes.
5. Release the buttons. The OVERRANGE LED continues to flash, indicating that the digitally-controlled offset zero
adjustment is enabled.
6. Use the probe BANDWIDTH and ATTENUATION buttons to set the probe offset voltage as close to 0 V as possible,
as displayed on the oscilloscope. The BANDWIDTH button decreases the offset voltage and the ATTENUATION
button increases it.
NOTE. To display the actual P5200A probe voltage instead of a scaled value on the oscilloscope, you must match the
attenuation setting of the oscilloscope to the probe attenuation setting. Use the on-screen Probe Setup menu on the
oscilloscope; the access method depends on the oscilloscope model.
For example, on DPO/MSO4000 series oscilloscopes, press the front-panel channel number button and then press the
More button on the lower bezel until Probe Setup is highlighted. The oscilloscope attenuation setting is displayed in the
Probe Setup menu. Change the attenuation by turning the multipurpose knob.
7. Press the AUDIBLE OVERRANGE button on the probe to store the adjusted offset value. The OVERRANGE LED stops
flashing to indicate that the offset value is stored and that the adjustment is disabled.
8. Select the remaining attenuation range and repeat steps 4 through 7.
45 P5200A Series High Voltage Differential Probes Instruction Manual