Service Information
12
P6133 Instruction Manual
To adjust the probe bandwidth do the following:
1. Connect the P6133 probe output to the oscilloscope CH 1 input.
2. Connect the probe tip through the 50
W
adapters and BNC cable to the
output of the leveled sine wave generator (as described in the High-
Frequency Compensation procedure on page 10).
3. Set the oscilloscope controls for 100 mV (includes 10X attenuator), 1 ms,
and 1M
W
DC coupling.
4. Set the leveled sine wave generator frequency to 50 kHz.
5. Adjust the generator output amplitude to produce a 6-division display on the
oscilloscope and center the waveform on screen.
6. Set the generator frequency range to the high-frequency position.
7. Slowly increase the setting of the variable frequency control until the display
amplitude decreases to 4.2 divisions (–3 dB).
8. Check the sine wave generator frequency readout. The frequency must be
greater than or equal to the specified P6133 probe system bandwidth. See
page 5.
9. If the reading is less than the required value, repeat the High-Frequency
Compensation adjustments beginning on page 10.
20 ns
R1
10 ns
R3
5 ns
C1, R2
5ns/div.
Figure 9: High-frequency adjustment effects on waveform areas
Bandwidth Check
