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4. Impulse and
Resolution
Bandwidth
Accuracy Test
Related Adjustment
Specification
Description
SYNTHESIZER
LEVEL GENERATOR
Equipment
Procedure
4-4 Option 462
Impulse Bandwidth Adjustments
-0, +50%, 300 Hz to 10 Hz (6 dB bandwidths)
A frequency synthesizer and pulse/function generator are used
to input pulses to the spectrum analyzer. The amplitude of the
pulses is measured, and the impulse bandwidths are calculated for
each impulse bandwidth from 3 MHz to 1 kHz. The 6 dB resolution
bandwidths are then measured using the spectrum analyzer @iZZiZK~
function. The CAL OUTPUT signal is used as a stable signal source to
measure the 6 dB resolution bandwidths.
P U L S E / F U N C T I O N
GENERATOR
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Figure 4-2. Impulse Bandwidth Test Setup
Frequency Synthesizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 3335A
Pulse/Function Generator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 8116A
1. Set the frequency synthesizer for a 15 MHz, + 13 dBm output.
Connect the output of the frequency synthesizer to the EXT
INPUT of the pulse/function generator.
2. Set the pulse/function generator controls as follows:
MODE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TRIG
EXT INPUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . positive-going
EXT INPUT LEVEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . midrange
OUTPUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . pulse
HIL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.4
WIDTH (WID) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 ns
DISABLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . off
SPECTRUM ANALYZER
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