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Test the TTL threshold
1 Press the Format key. Select the field to the right of Pod 1, then select TTL in the
pop-up menu.
2
On the function generator front panel, enter 1.647 V ±1 mV 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
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.
Testing Performance
To test the threshold accuracy
3–10