Agilent Technologies HP 8566B Especificações Página 229

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9. 3 dB Bandwidth Adjustments
9.
3
dB
Bandwidth
Adjustments
Reference
Related Performance
Test
Description
Equipment
Procedure
(For instruments with Option 462, refer to Chapter 4.)
IF-Display Section
A4A9
IF Control
Resolution Bandwidth Accuracy Test
The spectrum analyzer CAL OUTPUT signal is connected to the RF
INPUT. Each of the adjustable resolution bandwidths is selected and
adjusted for the proper
3-dB
bandwidth.
No
test equipment is required for this adjustment.
1.
Position the spectrum analyzer upright and remove the IF-Display
Section top cover.
2.
Set the spectrum analyzer LINE switch to ON and press
1-J.
3.
Connect
the
spectrum analyzer CAL OUTPUT to the RF INPUT.
4.
On the spectrum analyzer, key in the following settings:
(CENTER FREQUENCY) .....................................
100 MHz
........................................................
5.
On
the spectrum analyzer, key in (SHIFT) RES BW A [AUTO),
(REFERENCE LEVEL] and use the DATA knob to position the signal
peak near the reference level (top graticule line).
6.
On the spectrum analyzer, key in (PEAK SEARCH), MARKER
@,
and press
@J
several times to position the second marker at the
leftmost graticule line.
7.
Adjust
A4A9R60
3 MHz for a MARKER A indication of -3.00
dB
*0.05
dB.
See Figure 3-45 for location of adjustment.
8.
On the spectrum analyzer, press
m
several times to position
the second marker at the rightmost graticule line. Then, press
($sTopFREQ)
and use the DATA knob to adjust the centering of the
displayed signal for a MARKER A indication of -3.00
dB
f0.05
dB.
Adjustments
3.69
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