What are the causes of the VSWR alarm and troubleshooting with commands?

user_2942081 · Created Jan 28, 2019 03:41:58

Hello there!

1. The causes of the standing wave ratio are as follows:

antenna feeder system: feeder interface, feeder quality and construction quality;

RRU hardware and interface; RRU temperature is too high, resulting in a hot interface, standing wave ratio shaking;

(3) the transmitted power of the RRU exceeds the carrying capacity of the antenna (indoor distribution system).

2. The standing wave ratio alarm threshold is 2.5; however, the standing-wave ratio criterion is less than or equal to 1.5.

3. DSP VSWR and STR VSWRTEST are queried and setting; query the RRU history alarm.

mohamedts · Created Jan 23, 2019 13:01:34

the causes of VSWR alarm it may be due to fault in jumper, antenna connector, feeder or RRu problem.
alarm appears as the value exceeds threshold you can check threshold through "LsST RRU" and to test value of VSWR "STR VSWRTest"

user_29203322 · Created Jan 26, 2019 03:44:48

1、the causes of VSWR alarm
•The jumper installation does not conform to the plan.
•The feeder connector on the antenna port does not meet the requirements, which is loose or waterlogged, or has foreign matter.
•The feeder connected to the antenna port of the RF unit is bent or deformed; the feeder is damaged.
•The RF unit is faulty in hardware.
•The frequency bands supported by the RF unit do not match the frequency bands supported by the components of the antenna system. The components of the antenna system include antennas, feeders, jumpers, combiner-dividers, filters, and tower-mounted amplifiers (TMAs).
•A component of the antenna system is damaged.
2、Common VSWR alarm commands
•The VSWR queried by the DSP VSWR command is the result of the test that uses the current power of the RF module as the test power, and the VSWR test started by the STR VSWRTEST command is based on single tone and uses the maximum power of the RF unit as the test power. The precision of the two kinds of VSWR tests is different and so the test results are different.

user_2942081 · Created Jan 28, 2019 03:41:58

Hello there!

1. The causes of the standing wave ratio are as follows:

antenna feeder system: feeder interface, feeder quality and construction quality;

RRU hardware and interface; RRU temperature is too high, resulting in a hot interface, standing wave ratio shaking;

(3) the transmitted power of the RRU exceeds the carrying capacity of the antenna (indoor distribution system).

2. The standing wave ratio alarm threshold is 2.5; however, the standing-wave ratio criterion is less than or equal to 1.5.

3. DSP VSWR and STR VSWRTEST are queried and setting; query the RRU history alarm.

user_3301107 · Created Jan 28, 2019 06:04:05

DSP VSWR in U2000

amr_rashedy · Created Jul 26, 2020 11:11:03

VSWR Voltage Standing Wave Ratio
alarms occur when issues happen between the source and the receiver. These are often issues with the antenna, cables, or even connectors that can lead to degraded system performance. A VSWR alarm may indicate that a component is damaged.
One of the most important factors that cause VSWR is poor isolation of connectors Which caused water droplets to leak inside the conductor

ethanbrown · Created Jul 27, 2020 10:52:24

thank you for your support.

What are the causes of the VSWR alarm and troubleshooting with commands?

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What are the causes of the VSWR alarm and troubleshooting with commands?

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