To Check Probe Power Outputs - Keysight Infiniium 9000 Series Service Manual

4
Troubleshooting

To check probe power outputs

Probe power outputs are on the front panel, surrounding each BNC input.
Use the table and figure to the right
to check the pow er output at the
connectors.
M easure the voltages w ith respect
to the ground terminal on the front
panel, located near the Aux Out
BNC.
Do not attempt to measure voltages
at pins 3 through 7.
Any failure may be a problem with the probe power and control assembly, the
AutoProbe flex cable, the probe power and control cable, or the power board.
92
The + 12 V and –12 V supplies
come from ripple regulator on
the pow er board, and the + 3 V
and –3 V supplies are
developed in three- terminal
regulators on the probe pow er
and control assembly.
Pin Supply
1 + 3 V
2 –3 V
3 Offset
4 Data
5 & Probe ID
ring
6 Clk
7 R p
8 –12 V
9 + 12 V
Infiniium 9000 Series Oscilloscopes Service Guide