Using The 9500B To Test The Input Leakage Current Of A Uut Oscilloscope - Fluke 9500B User Handbook Manual

4.17.6 Using the 9500B to Test the Input Leakage Current of a UUT
Oscilloscope
4.17.6.1 Introduction
The test procedure consists of applying an
open-circuit and short-circuit to each channel
input in turn, as specified in the oscilloscope
manufacturer's input leakage test, and checking
that the resulting deflection is within
specification limits.
4.17.6.2 Interconnections
a. Use the appropriate active head to connect
from the required 9500B signal output
channel to the UUT input channel.
b. If a UUT trigger is required, use the
appropriate active head (or trigger cable)
to connect from the required 9500B channel
output to the UUT Trigger input.
4.17.6.3 9500B and UUT Scope
Setup
The following procedures assume that the
9500B instrument is in Manual Mode. It is also
assumed that the user will be familiar with
front panel operation. In case of difficulty, re-
read the paragraphs earlier in this Section 4.
1. Preparation
Ensure that both instruments are powered ON
and warmed up.
2. UUT 'Scope
Select the required function for Input Leakage
test.
3. 9500B
Ensure that the 9500B is in Input Leakage
Function with Output OFF. If in any other
function, press the 'Aux' key on the right of the
'OSCILLOSCOPE CALIBRATOR' panel,
then the soft key on the bottom of the
screen.
4.17-2 Section 4: Using the Model 9500B — Input Leakage Function
4.17.6.4 Sequence of Operations
Refer to the table or list of UUT Oscilloscope
Input Leakage Test points in the UUT
Oscilloscope Manufacturer's Test Guide.
Follow the sequence of test stages as directed
by the guide, and carry out the following
operations (1) to (7) at each stage.
1. 9500B
c. If the scope requires a repetitive trigger,
press the 'AUTO TRIG' soft key at the
bottom right corner of the screen.
2. UUT 'Scope
a. Select the correct channel for the test point.
b. Select the correct range for the test point.
c. If required, adjust the sweep speed and
trigger level.
3. 9500B
a. Set Output ON.
b. Press the screen key to select short
circuit output, and provide a one-shot
trigger to the UUT.
4. UUT 'Scope
Adjust the 'Y' position control to place the
display on the zero axis.
5. 9500B
Press the screen key to select open
circuit output, and provide a one-shot
trigger to the UUT.
6. UUT Response
Record the UUT 'Scope 'Y' deflection at the
test point as detailed in the UUT Oscilloscope
Manufacturer's Test Guide.
7. 9500B Set Output OFF.
Descriptions assume 9500B/1100