Agilent Technologies 75000 Series Service Manual page 42

NOTE
If the maximum frequency of the Spectrum Analyzer is reached before the
3 dB frequency, record the result as '> F
frequency of the Spectrum Analyzer. If the Spectrum Analyzer is an
Agilent 3585A, for example, the result should be written as '> 40E6'.
Connect tracking
generator to:
Input1
Input1
Input1
Input2
Input2
Input2
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5. Set the Spectrum Analyzer as follows:
•
Resolution bandwidth: 30 Hz
•
Video bandwidth: 100 Hz
•
Sweep mode: Manual
•
Manual frequency: 100 Hz
6. Note the amplitude reading at 100 Hz. This value will be used as
the reference level in step 8.
7. Set the Spectrum Analyzer as follows:
•
Resolution bandwidth: 10 kHz
•
Video bandwidth: 10 kHz
•
Sweep mode: Continuous
8. Starting from 100 Hz, move the marker to the right until the
amplitude reading is 3 dB below the reference level found in step 6.
The amplifier bandwidth is equal to the marker frequency at this point.
Record the result in Table 2-4.
Table 2-3. Bandwidth Test Points
Connect Spectrum
Analyzer input to:
Main
Diff+
Diff-
Main
Diff+
Diff-
', where F is the maximum
max max
Spectrum Analyzer
Range:
15 dB
-5 dB
-5 dB
15 dB
-5 dB
-5 dB
Verification Tests 2-23