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Model 8902A
Performance Tests
0
0
OOODO
D O
0
0000
DDODO
OUOOOQ
: : : : :
10
w
TIMEBASE
0
0 0
000000
00000
Q
e. Key in 32.1 SPCL and 4.1 SPCL to enable 0.001
d B
resolution and 10 second averaging.
f. Press the
LOG/LIN
key for a log display in
dB.
g.
Wait for a measurement
to
be displayed.
h. Press
SET REF
(blue key and zero key) to establish the current level as a reference.
i.
The Measuring Receiver display should now be
O.OO0
dB
f0.003
dB.
SIGNAL GENERATOR
Step Attenuator
Setting (dB)
0
10
20
30
40
50
0
Figure 4-8. Tuned RF
Level Performance Test Setup
4.
Measure 0 dBm to
-50
dBm Error:
Step Attenuator
Value (dB)
A l =
0.000 dB
B1=
c1=
D1=
E l
=
F1=
G1= 0.000 dB
a. Set the Step Attenuator as indicated in the following table and record the Measuring
Receiver readings in the column labeled "HP 8902A Reading
(dB)".
(Take the average of
three readings.)
b. Record the Step Attenuator calibrated value for each setting in the column labeled "Step
Attenuator Value
(dB)".
c. Determine the Measuring Receiver error as indicated in the column labeled "Calculated
Error". Record the error in this column.
d. When the RECAL annunciator lights, press CALIBRATE and wait for the calibration to
be made. (Recalibration
will
take approximately
1
minute.)
HP 8902A
Reading (dB)
A=
B=
C=
D=
E=
F=
G=
Lower
Limit
-0.015 dB
-0.025 dB
-0.035 dB
-0.045 dB
-0.055 dB
-0.065 dB
-0.015 dB
Upper
Limit
0.015 dB
0.025 dB
0.035 dB
0.045 dB
0.055 dB
0.065 dB
0.015 dB
rev.24A
UG87
4-50.1
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