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Performance Tests
Model 8902A
INPUT
RF
SPECTRUM ANALYZER
REFLECTED
RF OUTPUT
HP 8902A
MEASURINQ RECEIVER
SENSOR
I
RF INPUT
6 dB ATTENUATOR
SVR
B R I N E
SIGNAL GENERATOR
RF OUTPUT
~
~~
Figure
4-
7. S WR Pcflormance Tat Setirp
PROCEDURE
Sensor Module's Power Sensor SWR
NOTE
If
a sensor modirle is not available, pet$orm steps I fhroirgh
4
except set fhe signal
gentrator f o -27 dBm.
On
the Measitring Receiver, press FREQ and key in 1.0 MHz.
Then confinire on af sfep
14.
1. Connect the equipment as shown in Figure 4-7. Connect the 6 dB attenuator directly to the
RF input of the SWR bridge.
D o
not connect anything
to
the device-under-test input of the
SWR bridge at this time.
2. Set the signal generator level to +3 dBm CW.
3. Set the spectrum analyzer to sweep 0 to 1 GHz. Set the display for
10
dB per vertical division.
4. With the sensor module disconnected from the SWR bridge, tune the signal generator from
0.1
to 1300 MHz and note the level of the signal. Adjust the spectrum analyzer's reference level, as
needed, to set the average level of the signal to a convenient graticule reference. Resweep the
signal generator and note the reference on the display.
NOTE
I f
the signal generator or sptWxm analyzer
is
incapable of' complcie covcv-age o f the
ficqircncy rangc: irsc whaicwr range is availahlc.
the specirirm analyzer has variahlc
persistence or storage capabilify, irse
ii
to store
[he
rt;ference line.
5. On the Measuring Receiver, press the blue key then press INSTR PRESET (the AUTOMATIC
OPERATION key) to preset the instrument. Press RF POWER. Connect the sensor module
to
the SWR bridge. (See Figure 4-7.)
4-32
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