
7. IF Gain Uncertainty Test
Equipment
Procedure
10
dB
Gain
Steps
Note
Frequency Synthesizer
.................................
.
.
.
HP 3335A
Adapter, Type N (m) to BNC (f)
........................ . .
1250-0780
1.
2.
3.
Press
(j2).
4.
Connect CAL OUTPUT to RF INPUT.
Press
m
@. Adjust AMPTD CAL for a MARKER amplitude
of -10.00
dBm
f0.02
dB.
Press
@YZZQ
5.
Set the frequency synthesizer for an output frequency of 20.0010
MHz and an output power level of -2.0
dBm.
Set the amplitude
increment for 10
dB
steps.
6.
Connect the equipment as shown in Figure 2-9.
7.
Key in analyzer settings as follows:
(CENTER FREQUENCY)
................................
20.001 MHz
[FREQUENCY SPAN]
...................................
. . . . . .
2
kHz
8.
9.
10.
11.
12.
Press MARKER (PEAK SEARCH],
(j-1
or adjust
[CENTER FREQUENCY) to center signal trace on display.
Set analyzer as follows:
@iEEGii- .................................................
100 Hz
(RES=j
.....................................................
1
kHz
LOG [ENTER
dB/DIvj
..........................................
1
dB
Press MARKER
(
PEAK
SEARCHJ
Ia].
Press
[sHIFTI),
CATTEN)’
to permit extended reference level settings.
Set the analyzer (REFERENCE LEVEL],
(j\/IDEOj,
and frequency
synthesizer amplitude according to
‘Iable
2-9 settings. (Use the
frequency synthesizer
QlJ
for
10
dB
steps.) At eachsetting, note
the MKR A amplitude displayed in the upper right corner of the
analyzer display (deviation from the 0
dB
reference setting) and
record it in the table. See Figure 2-10.
After measurement at the (REFERENCE LEVEL] = -70
dBm
setting, press
m),
CENTER
dB/DIVp
as indicated in
Table
2-9.
2-22 Performance Tests
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