•
•
Model 436A
Operation
OPERATING INSTRUCTIONS
LOCAL
OPERATION
1. BEFORE SWITCHING
ON
THIS INSTRUMENT,
ensure
that
the power transformer primary
is
matched
to the available line voltage, the correct fuse
is
installed, and safety precautions are taken. See Power
Requirement, Line Voltage Selection, Power
Cables, and associated warnings and cautions in
Section
IL
NOTE
If
Power
Meter
is
equipped with the Hewlett-Packard Interface Bus Option, either unplug data bus cable
from connector J7 on
rear
panel or program
Power Meter for Local operation
as
described under
Operating Instructions paragraph.
DO
NOT
TWIST
the body
of
the power sensor when connecting or disconnecting it to other
instruments. Twisting may cause major damage to the power sensor's electrical circuits.
2.
Connect the Power Sensor to the
Power Meter with the
Power Sensor Cable.
3.
Connect the Power
Cable to the power outlet and
G)
Line
Power Module receptacle and set the
0
LINE
ON-OFF switch to
ON
(in).
4.
Set
the remaining
Power
Meter switches
as
follows:
5.
G
CAL
FACTOR%
.
100
•
POWER
REF . off (out)
.MODE
. . . .
WATT
GRANGE
HOLD
. . . . . . . . . . . . off (out)
Press
and hold the
G)
SENSOR ZERO
switch and wait for the
0
Digital Readout to stabilize. Then
verify that the
0
ZERO
lamp
is
lit and that the
0 Digital Readout indicates
0.00 ±0.02.
NOTE
When
auto-zeroing the
Power Sensor,
no
RF
input power may be applied while the
ZERO
lamp
is
lit.
If
any
RF
input power
is
applied,
it
will introduce
an
offset that will
affect
subsequent measurements.
6.
Release the
G)
SENSOR ZERO
switch and wait approximately
4
seconds for the
0
ZERO
lamp to
go
out.
7.
Connect the Power Sensor
to the
0
POWER
REF
OUTPUT
connector and set the
8
POWER
REF
switch to
ON
(in). Then adjust the
9
CAL
ADJ control so that the
0
Digital Readout indicates
1.000
mW.
8.
Set
the
0
POWER
REF switch to off (out) and disconnect the
Power Sensor
from the
C)
POWER
REF
OUTPUT
connector.
9. Locate the calibration curve
on
the Power Sensor
cover and determine the
CAL
FACTOR for the
measure-
ment frequency; set the
Power
Meter
$CAL
FACTOR% switch accordingly.
10
.
See
Operating Precautions
in
the
Power Sensor Operating
and Service
Manuals for maximum power
levels which may be safely coupled to this system. Levels which exceed the limits may damage the
Power Sensor, Power Meter or both.
Set
the
0
MODE
and
G RANGE HOLD
switches for desired operation and connect the
Power Sensor
to the RF source.
Figure
3-3.
Operating
Instructions
(1
of
3)
3-11
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