14-12
IM 704510-01E
7.
Increase the trigger level of the TA720 in 5-mV steps. Gradually increase the
trigger level and record the voltage at which the input indicator illuminates as VH.
8.
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
9.
Perform similar tests by setting the output of the DC voltage generator to 0.000 V
and –4.000 V.
10.
Repeat steps 1 to 9 for CH B.
Test Result
• CH A
Voltage of the 7651
VL
VH
VTRIG
Allowable Range
4.000 V
3.950 V to 4.050 V
0.000 V
–0.010 V to 0.010 V
–4.000 V
–4.050 V to –3.950 V
• CH B
Voltage of the 7651
VL
VH
VTRIG
Allowable Range
4.000 V
3.950 V to 4.050 V
0.000 V
–0.010 V to 0.010 V
–4.000 V
–4.050 V to –3.950 V
Note
If noise is present due to the influence from the outside environment, connect a 1-
µ
F
capacitor between the signal line and ground.
14.6 Performance Test
