HP 8901B Operation And Calibration Manual page 382

Perfonname Tests
Model
890J.B
Performance Test 11
HIGH-SELECTIVITY
GAIN
(OPTION SERIES 030)
-
2314A
TO
2636A
Specification
Description
Characteristic
SELECTIVE
POWER
Frequency Range
Carrier Power Range
Relative
Measurement
Accuracy
Performance
Llmlts
10
to
1300
MHz
+30 to
-20
dBm
+30
to
-10 dBm
f0.5 dB
f0.5 dB
Conditions
12.5,25,
and 30 ldlz
filters
carrier noise filter
levels
>
-95
dBc;
12.5, 25,
and 30 kHz filters
levels
>
-129
dBc/Hz; carrier noise filter
This
test checks the relative accuracy of the selective power measurement mode. The
l i n e a r i t y
of
the
I F
1~115
detector (including the linearity of the internal dc voltmeter)
is
checked
fizst.
Linearily
is measured by feeding
a
455
kHz signal directly into the IF via the fiont-panel connector. The level
is
set to
produce
a
signal
that
is near the upper measurement limit of the detector,
a
level reference
is
set, and the
range
settings
held. The signal level is then decreased by precisely
5
dB,
and
the drop
in displayed level is compared
against
the decrease in level.
IF
gain
step accuracy is measured by increasing the attenuation of the attenuator in
5
dB
steps and
comparing the displayed reading with the increase in attenuation
Equipment
Signal
Generator..
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H P 3336C
Procedure
NOTE
In the following procedure the signal generator can be connected either to a
sensor module (which is connected to the Modulation Analyzer) or directly
to the Modulation Analyzer's INPUT connector. The procedure is written
for the latter case.
Detector
Linearity
1. Set the signal generator
t o 455 kHz CW at +3 dBm. Connect the
signal generator's output
to
the Modulation Analyzer's INPUT. Allow the equipment to warm
up
at least one-half hour.
4-38.4
Performance Test
11
rev.01 OCT9.2