2 1. Frequency Response Adjustments
Note
Procedure
Preliminary
Adjustments
Adapters:
Type N (f) to BNC (m) . . . . .
Type N (f) to APC 3.5 (f) . .
APC 3.5 (f) to APC 3.5 (f) . . .
SMB (m) to SMA (f) . . . . . . . . . .
APC 3.5 (m) to Type N (f) . .
APC 3.5 (m) to Type N (m) . .
BNC (f) to
Dual
Banana Plug
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HP
1250-1477
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HP
1250-1745
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HP
1250-1749
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HP
1250-0674
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HP
1250-1750
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HP
1250-1743
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HP
1251-2277
Cables:
Low Loss Microwave Test Cable (APC 3.5)
. . . . . . . . . . HP 8120-4921
BNC to SMB Snap-on Test Cable . . . . . . . . . . . . . . . . . . HP 85680-60093
Adjustment procedure 13, “Sweep, DAC, and Main Coil Driver
Adjustments” should be performed prior to this procedure,
particularly if the Al6 Scan Generator Assembly, A19 DAC Assembly,
A20 Main Coil Driver Assembly, or
AllA
YTO are adjusted, repaired,
or replaced. The YTX TUNE/YTO TUNE 1 (-3
V/GHz)
signal from
the
A19 DAC Assembly directly affects the tuning of both the
AllA
YTO
and
A6A8
YTX. Adjustments on the Al6 Scan Generator Assembly,
A19 DAC Assembly, and A20 Main Coil Driver Assembly have a direct
affect on
YTX/YTO
tracking in the preselected (2
GHz
-
22
GHz)
frequency bands.
1. Set the spectrum analyzer LINE switch to STANDBY. Turn the
spectrum analyzer over to position the RF Section on top, as
shown in Figure 3-89 and remove the RF Section bottom cover.
PCWR
KTER
PWER
SENSOR
SYNTHESIZED
SWZEPER
DIGITAL
VOLTMETER
Figure 3-89.
Frequency Response Preliminary Adjustments Setup
2. Connect a jumper between
A12TP2
to
A12TP3
(LOCK
INDICATOR DISABLE) on the Al2 Front Panel Interface
Assembly in the RF Section. See Figure 3-90 for the location of
A12TP2
and
A12TP3.
3-176 Adjustments
Commentaires sur ces manuels