HP 8340B Manual page 228

5-4.
M/N
LOOP,
A32, A33, and A32A1
Reference
Performance
Test:
Frequency Range and CW
Mode
Accuracy
Service Section:
Reference
—
M/N
Loops
Description
The
M/N
VCO
tuning range
is centered and
the output level is
set and checked to ensure an adequate
RF output level across the band of the
M/N
output.
SPECTf
•
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Q a
U Q
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—'
00
Q
Q 0 Q
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00
(^
0 0 0 0
a
FR
RE
(1
(R
DIQIT
^
—
WU ANALYZER
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a
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a
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• aa a
ao
aa
aa
aa
a
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0
09-6 0-®
EQUENCY
FERENCE
OMHZI
EAR PANEL)
AL VOLTMETER
°^^"°
"rT
INPUT—^
s-
INPUT
v"
LO
PCT
W VOLTAC
WER SUPP
»
B
°°...tt
.
————^
^
\.
A
•(
0
3E
LY
A33TP1
A33J2
A33J3
=!>——»
AFTER
EXT FREQ
STANDARD
(REAR PANEL)
OUT
0
0
0
0
0
0
DimT \
D o'D
in
0
0-0-
•
1
a-
o D
in
D- 0- D-
•
a-
D a
ir
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0 D D D
| H
D-0
0 0
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•
0000
•
/
"
1^1'•
Figure 5-7.
M/N
Loop
Adjustment Setup
Equipment
Spectrum Analyzer
..............
Digital Voltmeter (DVM)
...........
Low-Voltage DC Power Supply
.....
BNC
to
SMB
Snap-On Test Cable
..
Adapter,
SMB
Snap-On Male-to-Male
.........
HP 8566B
.........
HP 3456A
.........
HP 6294A
HP P/N
85680-60093
, . .
HP P/N 1250-0069
Procedure
1.
Position the
DUT
in the test position as shown
in
Figure
5-7 with bottom cover removed. On
the
DUT's rear
panel,
disconnect the
BNC
cable connected between INT and EXT Frequency
Stan¬
dard connectors, set INT/EXT
switch to EXT, then connect
a
BNC
cable from the DUT's EXT
connector to
Spectrum Analyzer Frequency Reference (10
MHz)
rear-panel connector. Allow one-
half hour warm up time.
HP 8340B/41B
Adjustments