••
Model 436A
Performance Tests
PERFORMANCE TESTS
4-13.
POWER
REFERENCE
LEVEL
TEST (cont'd)
10.
Set
the
Power Meter POWER
REF
switch
to
ON (in)
and
record
the
indications
observed on
the
DVM
as
V 1 ·
11. Disconnect
the
DVM
negative
input
lead from
the
V
RF
connector
on
the
432A
and reconnect
it
to
432A chassis ground. Record
the
new indication observed on
the
DVM
as
V
COMP·
12.
Calculate
the
power reference oscillator
output
level (PRF) from
the
following
formula:
Where:
. 2 2
=
2
V COMP (V 1 - V
0)
+ V 0 - V 1
pRF
4R
(CALIBRATION FACTOR)
P
RF
= power reference oscillator
output
level
V
COMP = previously recorded value
V
1
= previously recorded value
V
0
= previously recorded value
R =previously recorded value
CALIBRATION
FACTOR=
value for thermistor
mount
at
50
MHz (traceable
to
the
National Bureau
of
Standards)
13.
Verify
that
the
PRF
is within
the
following limits:
Min.
Actual
Max.
0.988mW
l.012mW
4-9
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