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4-12
4.1.13
Trigger Level Accuracy Test
4.1.13.1
Set the 2251A to its home state. Set the counter to DC input coupling for input A and
enable special functions.
(Command String: IP ADC SFEAAU)
4.1.13.2
Connect the counter to the DC standard as shown in Figure 4-10 and set the DC
Standard output voltage to 5.000 V.
Figure 4-10, Input A Trigger Level Test Configuration
4.1.13.3
Connect the DC Standard to input A of the counter. Single shot autotrigger the
counter (Command code S31). Recall the 2251A stored trigger level (Command code
RLA) and verify that it is 5.000 V ± 80 mV.
4.1.13.4
Reverse the polarity of the DC input to the counter, single shot autotrigger the
counter and recall the stored trigger level value. Verify that it is -5.000 V ± 80 mV.
4.1.13.5
Set the 2251A to its home state. Set the counter to DC input coupling for input B and
enable special functions.
(Command String: IP BDC SFEBAU)
4.1.13.6
Connect the DC Standard to input B of the counter as shown in Figure 4-11. Single
shot autotrigger the counter. Recall the 2251A stored trigger level (Command code
RLB) and verify that it is 5.000 V ± 80 mV.
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Содержание 2251A
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