12-14
IM 704610-01E
Test Procedure
• Test the TA220 after thirty minutes of warm-up.
• This test compares the applied DC voltage to the trigger level (slice level) set by the
TA220 and checks the error in the trigger level.
• Actual trigger detection is monitored by the TA220’s RF indicator.
Test Procedure
1.
Set the output level of the 7651 to 1.000 V.
2.
Set the trigger level of the TA220 to 1.060 V.
3.
Decrease the trigger level of the TA220 in 1-mV steps. Gradually decrease the
trigger level and record the voltage level at which the RF signal input indicator
blinks as VL.
4.
Set the trigger level of the TA220 to 0.940 V.
5.
Increase the trigger level of the TA220 in 1-mV steps. Gradually increase the
trigger level and record the voltage at which the RF signal input indicator blinks
as VH.
6.
The trigger voltage is derived by taking the average of VL and VH. Confirm that
this voltage is within the allowable range.
VTRIG = (VL + VH)/2
7.
Perform similar tests by setting the output of the DC voltage generator to 0 V
and –1.000 V.
Test Results
Voltage of the 7651
VL
VH
VTRIG
Judgment Criteria
1.000 V
0.95 V to 1.05 V
0.000 V
–0.01 V to 0.01 V
–1.000 V
–1.05 V to –0.95 V
12.6 Performance Test