8611/SM SIGNAL MONITOR OPTION
A-12
APPENDIX A
DATA
SPECTRAL
ORIENTATION
Since the WJ-9168 can handle both upright and inverted spectral inputs, the
included endpoint changes depending on the SPTI command setting. For
upright spectral inputs, the low frequency end point is included. For inverted
spectral inputs, the high frequency endpoint is included. These spectrum
differences are illustrated in
Figure A-4
.
An upright IF spectrum would be displayed as:
Span Parameter 0
10 MHz Span,
25 kHz Step Size
400 points/sweep
point
0
1
2
3
398
399
16.4 MHz
26.4 MHz
397
(400)
16.425 MHz
16.475 MHz
16.450 MHz
26.350 MHz
26.325 MHz
26.375 MHz
95-682A
An inverted IF spectrum would be displayed as:
Span Parameter 0
10 MHz Span,
25 kHz Step Size
400 points/sweep
point
0
1
2
3
398
399
26.4 MHz
16.4 MHz
397
(400)
26.375 MHz
26.325 MHz
26.350 MHz
16.450 MHz
16.475 MHz
16.425 MHz
95-682B
Figure A-4. Sweep Span Differences for Upright and Inverted Spectrums
Courtesy of http://BlackRadios.terryo.org
Summary of Contents for WJ-8611
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