7Service
58 Keysight 85024A User’s and Service Guide
Theory of Operation
The probe uses a Gallium Arsenide FET integrated circuit amplifier which provides
unity gain. This amplifier microcircuit requires +6 V and –4 Vdc to operate. These
voltages are provided by the regulator assembly.
The regulator assembly converts the +15 volt and –12.6 volt supplies from the
host instrument with two voltage regulators. The regulator supplies the +6 and –4
voltages to the amplifier microcircuit.
The most common failures in the probe will all result in loss of signal through the
probe, and will show up if the operator’s check is performed. The most common
failures are expected to be:
1 Destruction of the amplifier microcircuit due to static electricity (proper
anti-static precautions not taken).
2 Probe power tip damage (caused by the operator dropping the probe with the
sleeve retracted).
3 Possible regulator failure.
To Next Page
Loading...
