8. Option 857 Amplitude Fidelity Performance Test
14. Key in the following analyzer settings:
FREQUENCY
SPAN)
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100
kHz
[m,
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
kHz
SWEEP
ICoNTl
15. Press MARKER
[PEAK
SEARCH],
fjj],
CMRK
+
REF
LVL~
to
center the signal on the display.
16. Key in the following analyzer settings:
FREQUENCY
SPAN)
.
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.O Hz
k-1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Hz
17. Press MARKER A. Step the frequency synthesizer output
amplitude from + 10
dBm
to -80
dBm
in 10
dB
steps, noting
the MARKER A amplitude (a negative value) at each step and
recording it in column 2 of
Table
5-2. Allow several sweeps after
each step for the video filtered trace to reach its final amplitude.
18. Subtract the value in column 1 from the value in column 2 for
each setting to find the fidelity error.
19. Subtract the greatest negative fidelity error from the greatest
positive fidelity error for calibrated amplitude steps from -10
dB
to -70
dB.
The result should be
SO.6
dB
dB
20. Subtract the greatest negative fidelity error from the greatest
positive fidelity error for calibrated amplitude steps from -10
dB
to -90
dB.
The result should be 51.5
dB
dB
‘Ihble
5-l.
Log Amplitude Fidelity (10 Hz
RBW;
Option 857)
Frequency
1
2
Fidelity Error
Synthesizer Calibrated MARKER A Amplitude (Column 2
-
Column 1)
Amplitude Amplitude
W9
P)
Wm)
Step
+lO
0 (ref)
0 (ref)
0 (ref)
0
-10
-10
-20
-20
-30
-30
-40
-40
-50
-50 -60
-60
-70
-70 -80
-80
-90
5-4 Option 857
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