Input B X10 Attenuator Check Configuration - Racal Instruments 2251A Operator's Manual

4.2.3 Input B Attenuator Check
4.2.3.1 Set the counter to its home state. Select Frequency B as the measurement mode and
50 ohms input impedance for input B.
(Command code: IP FB BLI)
4.2.3.2 Connect the counter to the signal generator as shown in Figure 4-14.
Figure 4-14, Input B X10 Attenuator Check Configuration
4.2.3.3 Set the signal generator to 1 MHz, 10 mV. Increase the signal generator output level
until the counter gives a stable reading. Note the signal generator output level.
4.2.3.4 Enable the counters input B attenuator (Command code BAE) 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 ten times the level previously noted.
4.2.3.5 Disconnect the test equipment.
4-16
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