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4. Impulse and
Resolution
Bandwidth
Accuracy
Test
Related Adjustment
Impulse Bandwidth Adjustments
Specification
*20%,
3 MHz bandwidth
flO%,
1 MHz to 1 kHz bandwidths
-0, +50%, 300 Hzto 10 Hz (6
dB
bandwidths)
Description
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.
SPECTRUM ANALYZER
SYNTHESIZER
LEVEL GENERATOR
P
.
PULSE/FUNCTION
GENERATOR
.
J
EXT
OUTPU
INPUT
L
IT
I
816NAL
INPUT
9
Figure 4-2. Impulse Bandwidth
Test
Setup
Equipment
Frequency Synthesizer.....................................HP
3335A
Pulse/Function Generator..................................HP
8116A
Procedure
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
LOL
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .OV
HIL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.4
WIDTH (WID)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 ns
DISABLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . off
4-4 Option 462