Tektronix P6248, Руководство по обслуживанию

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Adjustment Procedures
22
P6248 1.7 GHz Differential Probe Service Manual
Gain
1.
Set up the equipment as shown in Figure 11:
a. Remove the BNC to probe tip adapter from the probe input. Insert the
Y-lead adapter into the probe tip.
b. With square pins, connect the red lead to the power supply positive
terminal, and the black lead to the power supply negative terminal.
c. Connect a ground lead from the probe case ground to the negative
terminal of the power supply.
d. Connect a second DMM to a pair of banana leads from the power supply
outputs.
-- +
Calibrated DC
voltage source
-- +
Digital multimeter
-- +
Digital multimeter
1103
P6248
CH 1
input CH 1
output
Female BNC-to-male
banana adapter
50
Ω
precision
terminator
50
Ω
BNC cable
Ground
lead
Y-lead adapter
Black (--) Red (+)
Figure 11: Setup for gain adjustment
2.
Set the DMM monitoring the output to DC Volts, 2 or 3 volt range.
3. Set the DMM monitoring the input to the 2 or 3 volt range. Keep averaging
turned on.
4. Set the probe to
÷
1 attenuation.