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ADJUSTMENTS
521. BANDWIDTH FILTER ADJUSTMENTS (SERIAL PREFIX 1909A)
REFERENCE:
A9, A 1 1, and A1
3
Schematics
DESCRIPTION:
The crystal and LC bandwidth filter circuits are adjusted for symmetry, center, and peak.
ThreedB bandwidths
are adjusted in Sweep
Generator/Bandwidth Control Assembly A9 (paragraph 5
-
22).
DISPLAY
EXTENDER
CABLE
ASSEMBLY
SPECTRUM
ANALYZER
000
00.0
INPUT
OUTPUT
ADAPTER
6
"
BNC
CABLE
FIGURE
56.
CRYSTAL AND LC BANDWIDTH FILTER ADJUSTMENTSTEST SETUP
EQUIPMENT:
....................................
Adapter, Type
N
Male to BNC Female HP 12504780
......................................................
BNC Cable, 6
-
Inch HP 10502A
..............................................
Crystal Short
(3
required)
See
Figure 5-6
NOTE
A crystal short consists of a
.O1
pF capacitor (HP Part Number 0160
-
0161)
and a
90.9
ohm resistor (HP Part Number 0757.0400) connected in series.
Two square terminal connectors (HP Part Number
03624265) are used to
connect the crystal short across the test points.
CAPACITOR
RESISTOR
TERMINAL CONNECTORS
FIGURE
56.
CRYSTAL SHORT CONFIGURATION