Input B Trigger Level Test Configuration - Racal Instruments 2251A Operator's Manual

Figure 4-11, Input B Trigger Level Test Configuration
4.1.13.7 Reverse the polarity of the DC input to the counter, trigger the measurement and
recall the stored trigger level value. Verify that it is -5.000 V ± 80 mV.
4.1.13.8 Disconnect the test equipment.
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