2461Type C User Manual
Performance Verification and Adjustments 6-12
Racal Instruments
1998
Trigger Level
Accuracy Test
Set the UCT to its default state. Set the UCT to DC coupling for
Input 1.
Equipment: Dc Standard
Configure the UCT as follow:
*RST
returns UCT to default state
INP1:COUP DC
selects DC coupling for Input 1
INP1:COMP:SET:AUTO ON
turns Auto Trigger on
Connect the UCT to the DC standard as shown in Figure 6-6.
Set the DC Standard output voltage to 1.000 volts. Next,
change the DC standard output to 4,000 volts (this insures
counter in x1 mode).
Figure 6-6 Input 1 Trigger Level Test Configuration
Connect the DC Standard to Input 1 of the UCT. Use following
command syntax to verify that the trigger level is 4.000V +/-
290mV.
Command Syntax:
MEAS1:VOLT:MAX?
measures positive peak
Verify that the reading is 4.000V +/- 290mV.
Reverse the polarity of the DC input to UCT. Verify that the
trigger level is –4.000V +/- 290mV.
Command Syntax:
GATE
IN
1
VT1
VT2
ARM
T2
IN
STD
OUT
IN
2
OSC
UCT
IN 3
SIGNAL GENERATOR
INPUT 1
DC OUT
+
-
DC SOURCE
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