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6. Resolution
Bandwidths
Note
Specification
Related Performance
Description
This procedure is only for instruments that do not have Option 462.
For Option 462 instruments, perform the test on the following page.
Bandwidth
Amplitude
Selectivity
Resolution Bandwidth Accuracy Test
Tests
Resolution Bandwidth Selectivity Test
Resolution Bandwidth Switching Uncertainty Test
A signal source is connected to the spectrum analyzer input. The
analyzer steps through the bandwidths from 3 MHz to 10 Hz, centers
the signal, sets signal peak near the reference level, and measures
the frequency of the 3 dB points for each bandwidth. The 3 dB
bandwidth is then calculated by determining the difference in
frequency between the 3 dB points.
Next the spectrum analyzer steps through the bandwidths and
measures the frequency of the 60 dB points of
60 dB bandwidth is then calculated by determining the frequency
difference between the 60 dB points.
The shape factors are calculated by dividing the 60 dB bandwidths by
the 3 dB bandwidths.
10 Hz to 3 MHz; f20%
3 kHz to 1 MHz; flO%
3 MHz to 10 Hz; f1.0 dB
1 MHz to 30 Hz; f0.5 dB
30 Hz; f0.8 dB
10 Hz; f2.0 dB
(60 dB/3 dB Ratio)
3 MHz to 100 kHz; <15:1
30 kHz to 10 kHz; <13:1
3 kHz to 30 Hz; <ll:l
10 Hz; ~100 Hz separation of 60 dB points
6. Resolution Bandwidths
each
bandwidth. The
Operation Verification 5-15
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