Voltage Standing Wave Ratio (VSWR or SWR) is an important stat for transmitter sites that should be continuously measured and monitored to be able to see - and frequently preempt - a problem before it has a significant impact.
VSWR / SWR is worth paying attention to on a wireless transmitter site as it:
- Is a good measure of the overall health of the antenna system
- Can highlight degraded system performance – coverage, voice quality, data throughput, etc.
- Helps avoid damage and failure to transmitters and repeaters from high VSWR
- Indicates if the system is performing as designed and intended