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13. Increase resistance by adjusting R1 and
R2 alternately in small increments until
channel /" and channel B wa'/eforms are
similar.
14. Replace probe chassis cover.
HP 10400A OPERATING NOTE
TROUBLESHOOTING
Probe Tip Failure
Excessive force on the probe tip assembly
may result in a bent or broken tip. A slight
bend may be carefully straightened with pliers.
If the bend is extreme, the probe tip will
probably have an open circuit and should be
replaced. Suspect probe tips may be checked
with an ohmmeter or by substitution with a
known good probe.
Probe Cable Failure
A bent or pinched cable may have inner
and/or outer conductive changes that may
affect bandwidth and pulse response
characteristics. Extreme stress in the cable
may cause center conductor failure.
19
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