Agilent Technologies 01664-97005 - Manual (Page 32)

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