9-14
IM 704420-01E
Test method
• Test the TA120E after 30 minutes of warm-up.
• This test compares the applied DC voltage to the trigger level (slice level) set by
the TA120E and checks the error in the trigger level.
• The actual detection of the trigger level is done by monitoring the RF signal input
indicator of the TA120E.
Test procedure
1.
Set the output level of the 7651 to 4.000 V.
2.
Set the trigger level of the TA120E to 4.100 V.
3.
Decrease the trigger level of the TA120E in 1-mV steps. Gradually decrease
the trigger level and record the voltage at which the RF signal input indicator
blinks as VL.
4.
Set the trigger level of the TA120E to 3.900 V.
5.
Increase the trigger level of the TA120E 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 –4.000 V.
Test result
Voltage of the 7651
VL
VH
VTRIG
Allowable Range
4.000V
3.83 V to 4.17 V
0.000V
–0.01 V to 0.01 V
–4.000V
–4.17 V to –3.83 V
9.6 Executing the Performance Test
