Test The - User Threshold - HP 1660E Series Service Manual

Testing Performance
To test the threshold accuracy (logic analyzer)
Test the - User threshold
1 Move the cursor to the field to the right of Pod AI. Type -6.00, then use the left and
right cursor control keys to highlight V. Press the Select key.
2 On the function generator front panel, enter -5.718 V ±I m V DC offset. Use the
multimeter to verify the voltage.
The activity indicators for pod 1 should show all data channels and the J-clock channel at a
logic high.
3 Using the Modify down arrow on the function generator, decrease offset voltage in
I-mV increments until all activity indicators for pod I show the channels at a logic
low. Record the function generator voltage in the performance test record.
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4 Using the Modify up arrow on the function generator, increase offset voltage in
I-mV increments until all activity indicators show the channels at a logic high.
Record the function generator voltage in the performance test record.
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3-14