VSWR calculations & thresholds

Hi All.

For 5G, Ericsson has VSWR alarm threshold at 1.5, but Nokia has minor alarm at 2.1 and major at 3.1.

What is the difference in calculation?

How to decide correct value for Major alarm?

These values are just to trigger alarms on HW.

Normally we focus on RTWP to keep KPIs in good thresholds.

These values have impact on KPIs in a way that if alarms appear then only field engineer clears the alarm.

If the alarm is at 3.1 and site has 3 VSWR then no one will look at it.

That’s the reason why we monitor RTWP/RSSI to escalate to FLM to fix Antenna line for such cases where we don’t have alarm.