Functional Checks; Input A Filter Check Configuration - Racal Instruments 2251A Operator's Manual

4.2

Functional Checks

4.2.1 Input A Filter Check
4.2.1.1 Set the counter to its home state. Select 50 ohms input impedance for
input A.
(Command code: IP ALI)
4.2.1.2 Connect the counter to the signal generator as shown in Figure 4-12.
Figure 4-12, Input A Filter Check Configuration
4.2.1.3 Set the signal generator to 50 kHz, 10 mV. Increase the signal generator output level
until the counter gives a stable reading. Note the signal generator output level.
4.2.1.4 Enable the counters input A filter (Command code AFE) and verify that the 2251A
no longer counts. Increase the signal generator until the counter gives a stable
reading.Note the signal generator output level and verify that this level is approximately
twice the level previously noted.
4.2.1.5 Disconnect the test equipment.
4-14
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com