Definitions, Measure match mode, Fault location mode – Bird Technologies SA-6000EX User Manual
Page 155: Cable loss mode, Vswr, Return loss, Appendix
139
Appendix
This appendix provides general information about the Site Analyzer
including term definitions, fault location equations, and fault location
distance tables.
Definitions
Measure Match Mode
The Match Measurement mode shows the resonant frequencies for an
antenna or filter. It also confirms that there are no impedance prob-
lems in the nonresonant components such as cables, connectors, light-
ning protectors, and jumpers.
Fault Location Mode
The Fault Location mode shows the location of any problems in the
antenna system. This is shown in either feet or meters from the cable
end connected to the Site Analyzer.
Cable Loss Mode
The Cable Loss mode shows the insertion loss of a coaxial cable. By
comparing this with the manufacturer’s specs, it confirms that there
are no problems with the cable.
VSWR
VSWR units used to be the preferred way to measure an antenna sys-
tem. A good antenna has a VSWR of less than 1.5:1 at its operating
frequency.
Return Loss
Return Loss measures, in dB, how much of a wave is reflected back to
the source. It is now the preferred method for measuring antenna sys-
tems. A good antenna will have a return loss of –14 dB or less at the
operating frequency. The more negative the reading, the better the
antenna.