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12. Amplitude Fidelity
Test
8. The fidelity error for amplitude steps from -10
dB
to -80
dB
should be
<&
1.0
dB.
9. The fidelity error at the -90
dB
setting should be
s&l.5
dB.
YKR
A
4J
REF
9.7
d&n ATTEN
20
dB
10
d0/
L
1
I I
1
I I I
I 1
CENTER
20.000
iB0
MHz
SPAN 0
nz
RES
BW
I
kHZ
VBW
1
HT.
SWP
300
n..c
Figure 2-22. Amplitude Fidelity Measurement
Linear Fidelity
10. Key in analyzer settings as follows:
(jEGi--
.................................................
300
Hz
FREQUENCY SPAN)
[M,
..........................................
.I
MHz
....................................................
1 MHz
11. Set the frequency synthesizer for an output power level of + 10
dBm.
12. Press SCALE LIN pushbutton. Press MARKER
CPEAK
SEARCHJ[MKR)
to center the signal on the display.
13. Set (FREQUENCY SPAN) to 0 Hz and
[VlDEo]
to 1 Hz. Press
@‘iYiF),[XF6-~
(resolution bandwidth), MARKER
a.
14. Decrease frequency synthesizer output amplitude by 10
dB
steps,
noting the MARKER A amplitude and recording it in column 2 of
‘Ikble
2-17.
Performance Tests 2-43