HP 436A - Page 60

Performance Tests
Model 436A
PERFORMANCE TESTS
4-11.
INSTRUMENT ACCURACY
TEST
{cont'd)
EQUIPMENT:
PROCEDURE:
4-4
RANGE
CALIBRATOR
POWER
METER
ccc@l[Jc
l
POWER
METE~
SENSOR
-
Figure
4-2.
Instrument
Accuracy
Test
Setup
Range Calibrator . . . . . . .
HP
11683A
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.
POLARITY.
RANGE
LINE
...
STANDBY
NORMAL
lmW
ON (in)
NOTE:
After
switching
to
STANDBY,
allow
60
seconds for the
Range
Calibrator to settle before zeroing the Power Meter.
3. Connect
the
equipment
as
shown in Figure 4-2.
4.
Press
and hold
the
Power Meter
SENSOR ZERO swtich
and
wait for
the
digital
readout
to
stabilize. Then verify
that
the
Power
Meter ZERO
lamp
is
lit
and
that
the
digital readout indicates
0.00
±
0.02.
If
the
digital readout does
not
indicate
0.00
±
0.02
repeat
the
procedure.
NOTE:
Power Meter is now zeroed on
the
most
sensitive range
(10
µ
W).
5.
Release
the
Power Meter
SENSOR ZERO
switch and wait for
the
ZERO
lamp
to
go
out
before proceeding
to
the
next
step.
6.
Set
the Range Calibrator FUNCTION switch
to
CALIBRATE and verify
that
the
Power Meter autoranges
to
the
1
mW
range.
7.
Observe
the
Power
Meter digital readout and,
if
necessary, adjust
the
front-panel
CAL
ADJ
control to obtain
a
1.000
±
0.002 indication:_
NOTE:
The
Range
Calibrator output level is adjustable
in
5
dB
incre-
ments. Thus, the 3
µ
W,
30
µ
W,
300
µ.
W,
3
mW,
and
30
:mW
leePnds
on
the
RANGE
switch
are approximations. The true outputs for these
settings
are 3.16
µ
W,
31.6
µ
W,
316
µ
W,
3.16
mW
and
31.6 mW.
,---.
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