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7. Impulse and
Resolution
Bandwidths (Opt.
462 Impulse
Bandwidth)
Specification
Related Performance
Tests
Description
Note
7. Impulse and Resolution Bandwidths (Opt. 462 Impulse Bandwidth)
3 MHz; &20%
Bandwidth
1 MHz to 1 kHz; &20%
300 Hz to 10 Hz; +50%, -0%
Amplitude
3 MHz; fl.O dB
1 MHz to 100 Hz; f0.5 dB
30 Hz; f0.8 dB
10 Hz; f2.0 dB
Selectivity
(60 dB/6 dB Ratio)
3 MHz to 100 kHz; <ll:l
30 kHz to 30 Hz; <8: 1
10 Hz; ~100 Hz separation of 60 dB points
Impulse & Resolution Bandwidth Accuracy Test
Impulse & Resolution Bandwidth Selectivity Test
Impulse & Resolution Bandwidth Switching Uncertainty Test
A source outputting pulsed RF signals is connected to the spectrum
analyzer input. The analyzer steps through the bandwidths from
3 MHz to 1 kHz, and the controller measures the frequency of the
impulse response for each bandwidth.
Next, a CW signal is connected to the spectrum analyzer input.
The analyzer steps through all bandwidths for 3 MHz to 10 Hz,
centers the signal, sets the signal peak near the reference level, and
measures the frequency of the 6 dB points for each bandwidth. The
6 dB bandwidth is then calculated by determining the difference in
frequency between the 6 dB points.
Last, the analyzer steps through the bandwidths and measures the
60 dB points for each bandwidth. The 60 dB bandwidth is calculated
for each bandwidth. The selectivity of each bandwidth is then
calculated by dividing the 60 dB bandwidth by the 6 dB bandwidth
for each filter.
This test is for Option 462 instruments only. For standard instruments,
perform the test on the preceding page.
Operation Verification 5-17
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