Adjustments
Model 436A
ADJUSTMENTS
5-19. MUL
TIVIBRATOR
ADJUSTMENT
REFERENCE:
DESCRIPTION:
Service
Sheet
7.
FREQ
potentiometer
A2R69
is
adjusted
to
set
the
reference frequency of
the
multi-
vibrator which drives
the
phase detector and
the
FET power sensor.
RANGE
POWER
CALIBRATOR
METER
I
TOA2TP5
COUNTER
EQUIPMENT:
PROCEDURE:
5-6
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POWER
METER
SENSOR
~
-
-
-
Figure
54.
Multivibrator
Adjustment
Setup
Range
Calibrator
.
Counter
....
HP
11683A
.
....
HP
5315A
1.
Set
the
Power Meter switches as follows:
CAL FACTOR
% .
POWER REF .
MODE
....
RANGE
HOLD
LINE
....
100
off (out)
WATT
off
(out)
ON
(in)
2.
Set
the
Range Calibrator switches
as
follows:
FUNCTION
. CALIBRATE
POLARITY.
NORMAL
LINE .
. .
ON
(in)
3.
Connect
the
equipment
as
shown in Figure 5-4.
4. Remove the
Power
Meter
top
cover, adjust FREQ
potentiometer
A2R69
to
obtain
maximum indication
on
the
digital readout, and verify
that
the
counter indicates
220
±
16
Hz.
5. Perform the
Instrument
Accuracy Test described in Section IV
to
verify overall
Power Meter accuracy.
If
all indications are obtained as specified, the adjustment
is
complete.
If
any
indication cannot be obtained
as
specified, perform
the
A-D
Converter and Linear Meter Adjustment.
••
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