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12. Option 857 Amplitude Fidelity
Test
Frequency
1
Synthesizer
Calibrated
Amplitude
Amplitude
(dBm)
Step
+lO
0 (ref)
0
-10
-10 -20
-20 -30
-30 -40
-40 -50
-50
-60
-60
-70
-70
-80
-80 -90
20. Subtract the greatest negative fidelity error from the greatest
positive fidelity error for calibrated amplitude steps from -10
dB
to -70
dB.
The results should be
SO.6
dB.
dB
21. Subtract the greatest negative fidelity error from the greatest
positive fidelity error for calibrated amplitude steps from -10
dB
to -90
dB.
The results should be
1.1.5
dB.
dB
‘Ihble
5-2. Log Amplitude Fidelity (10
kBz
RBW;
Option 857)
2
Fidelity Error
MARKER A Amplitude (Column 2
-
Column 1)
(3
PI
0 (ref) 0 (ref)
Cumulative
Cumulative
Error
Error
0 to 80
dB
0 to 90
dB
WV
(dB)
sk1.0
dB
<%1.5
dB
Linear Fidelity
22. Key in analyzer settings as follows:
&iEEEK-BW)
.................................................
300
Hz
FREQUENCY
SPAN_)
km,
..........................................
20
kHz
...................................................
10
kHz
23. Set the frequency synthesizer for an output power level of + 10
dBm.
24. Press SCALE LIN pushbutton. Press MARKER
[PEAK
SEARCH_),(MKR)
to center the signal on the display.
25. Set (FREQUENCY SPAN) to 0 Hz and
CV’DEOBW)
to 1 Hz. Press (SHIFT),
m
(resolution bandwidth), MARKER
a].
26. Decrease frequency synthesizer output amplitude by 10
dB
steps,
. noting the MARKER A amplitude and recording it in column 2 of
‘Iable
5-3.
Option 857 5-5