Installation Manual Part 5

PRELIMINARY
D-3
BWX 8415 Basestation Installation and Commissioning Guide
OL-19519-01
Appendix D RF Center Frequency and Interference Analysis Guidelines
Spectrum Analyzer Settings
Reference Level
This parameter sets the level of the top line of the Spectrum analyzer display (Figure D-1). Figure E-1
shows a display with the reference level set to –50 dB and the noise floor at –104 dB. The Blue line is a
display line showing a level of –103.9 dB.
As you can see, the top-level line displays –50dB. On most Spectrum Analyzers the RF noise floor is
coupled with the Reference Level line. A Spectrum Analyzer will try and display the noise floor on
screen. If the reference level is set at a level that is too high for the Spectrum Analyzer to display the
noise floor, it will automatically change the displayed level for the noise floor (
Figure D-2).
Figure D-1 -50 Reference Level
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