Input A High Frequency Sensitivity Test Configuration; Input A Sensitivity High Frequency Performance Limits - Racal Instruments 2251A Operator's Manual

If Option 11 is installed connect the 2251A internal reference output to the
external signal source 10 MHz Input. Configure the external signal source
to accept the 10MHz reference from the 2251A.
4.1.6.4 Connect the Signal Generator to the 2251A as shown in Figure 4-2.
Figure 4-2, Input A High Frequency Sensitivity Test Configuration
4.1.6.5 Set the 2251A measurement resolution to the values given in Table 4-2 and apply the
frequencies given to the counters input A. Verify that the 2251A gives a stable
reading within the tolerances given at less than the signal level given.
Frequency
200 MHz
160 MHz
100 MHz
10 MHz
100 kHz
Table 4-2, Input A Sensitivity High Frequency Performance Limits
4.1.6.6 Disconnect the test equipment.
4-4
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Signal level Resolution
50 mV rms* 9
50 mV rms 9
25 mV rms 9
25 mV rms 8
25 mV rms 8
* Valid up to 30(C
Tolerance
± 1 Hz
± 1 Hz
± 1 Hz
± 1 Hz
± 0.1 Hz