HP 8340B Manual page 319

5-18.
PULSE
ADJUSTMENTS (Cont'd)
NOTE
The following adjustments are required
if
any
of the following four
assemblies have been replaced or
if
any of the controls listed after each
assembly have been adjusted or replaced.
A11
High Band
Detector (Bands
1
-
4)
A21
Pulse Modulator Assembly, A21R45 (ON DELAY-INT), A21R47 (OFF
DELAY)
A25 ALC Detector Assembly, A25R58 (BAL)
A26 Linear Modulator Assembly, A26R7 (BAL)
Equipment
Synthesized Sweeper
...................................
HP 8340B
Opt. 001
Pulse Generator
...............................................
HP 8012B
Oscilloscope
...................................................
HP 1741A
10:1
Divider Probe
............................................
HP 10004D
Mixer
.................................................
HP P/N 0955-0307
Digital
Voltmeter
...............................................
HP 3456A
Amplifier
.....................................................
HP 8447F
Low Pass Filter
.........................................
HP P/N 9135-0260
10
dB Attenuator
.....................................
HP 8493C Option 010
Adapters:
APC 3.5 (f) to APC 3.5
(f)
................................
HP P/N 5061-5311
(required
if DUT
is
an HP 8340B)
APC 3.5 (f)
to
Type-N (m)
..............................
HP P/N 1250-1744
(required
if DUT
is
an HP 8341 B)
BNC (f)
to Dual Banana
...............................
HP P/N 1251-2277
BNC
Tee
.............................................
HP P/N 1250-0781
Procedure
If the DUT
is equipped
with Option
006,
Delete Pulse Modulation, proceed directly to step
16.
DETECTOR SAMPLE AND HOLD BALANCE
ADJUSTMENT
1.
Connect equipment as shown
in
Figure
5-64.
Allow at least
30
minutes
warmup.
NOTE
The A21, A25, and A26 PC
boards must
not be placed
on
extender
boards in
this adjustment procedure. Also, the cables connected to
detectors
A11
and
A12 are
especially designed for low capacitance and
only
these cables may be used during adjustment procedures.
2. Set the
oscilloscope as follows;
DISPLAY
........................................................
CHOP
MODE
...........................................................
MAIN
MAG X5
............................................................
ON
CH A
...........................................
0.005 V/Div AC COUPLED
CH
B
...................................................
5
V/Div 50 Ohms
TIME/Div
........................................................
2
nsec
Connect CH A
probe to
A26TP2 (DET)
5-122
Adjustments
HP 8340B/41B