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
- RF Sensor – a sensor is permanently placed in-line between the transmitter and antenna. These sensors measure forward and reflected power and thus VSWR can be calculated.
- Digital Transmitters – newer digital transmitters have the built-in ability to measure VSWR. For example, Mototrbo repeaters from Motorola Solutions have onboard Repeater Diagnostics and Control (RDAC) which measures a variety of key operational statistics including VSWR.
- Our RF sensor can securely measure and report forward power and VSWR for transmitters from 20MHz to 1GHz, analog or digital, across most equipment manufacturers
- As a solution partner with Motorola Solutions, our Mototrbo repeater digital interface allows us to capture and report VSWR as measured by the Motorola RDAC diagnostics on the repeater.