Test The - User Threshold - HP 1660 Series Service Manual

Test the − User threshold
Move the cursor to the field to the right of Pod 1. Type –6.00, then use the left and
1 1
right cursor control keys to highlight V. Press the Select key.
On the function generator front panel, enter − 5.718 V ± 1 mV DC offset. Use the
2 2
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.
Using the Modify down arrow on the function generator, decrease offset voltage in
3 3
1-mV increments until all activity indicators for pod 1 show the channels at a logic
low. Record the function generator voltage in the performance test record.
Using the Modify up arrow on the function generator, increase offset voltage in
4 4
1-mV increments until all activity indicators show the channels at a logic high.
Record the function generator voltage in the performance test record.
Testing Performance
To test the threshold accuracy (logic analyzer)
3–13