Service Information
P6133 Instruction Manual
11
9. Note the high-frequency aberrations in the first 30 ns (in addition to the
system aberrations noted in step 5).
10. If the probe aberrations are greater than
4%, 6% peak to peak, proceed to
step 11 below. If the probe aberration are typical (
4%, 6% peak to
peak), proceed to step 17.
11. Disconnect the probe from the signal source and the oscilloscope.
12. Unscrew the compensation box retainer nut about two complete turns and lift
the cover out and up. Retighten the retainer nut.
13. Reconnect the probe to the signal source and oscilloscope.
See Figure 8 for the location of all adjustments to follow and Figure 9 for
identification of the waveform area affected by each adjustment. The
high-frequency adjustments affect probe bandwidth. A small overshoot on
the leading edge of the pulse may be necessary to meet the bandwidth
specification.
14. Adjust R1 for the best overall flat response.
15. Adjust R2 for the best corner response.
16. Disconnect the probe from the signal source and reinstall the compensation
box cover by performing step 12 above in reverse order.
17. Disconnect the test setup.
R2
R3
R1
C1
LF COMP
Retainer nut
Figure 8: High-frequency adjustments locations
