Vswr (Voltage Standing Wave Ratio) - Andrew Node C837 User Manual

5 Functional Description

5.2.3 VSWR (Voltage Standing Wave Ratio)

This feature enables the provider to query the status of the antenna system (antenna
& cable). The voltage standing wave ratio of the DL output antenna port is measured.
If the VSWR falls below the value set in the "Alarming Management" (see chapter
4.2.4.4), an alarm is released. The alarm can be forwarded to the OMC where the
faults and irregularities can be acknowledged and eliminated promptly.
The current VSWR value can be checked in the "Status and Reports" menu
accessible via the home page of the web interface (see figure 4-4).
5.2.4 RSSI (Receive Signal Strength Indication)
The RSSI provides controlling and monitoring of the receive level of a base station
(DL RSSI) or user equipment (UL RSSI) to a Node C. It measures the level of the
input signal by detecting the RF and converting the analogue level into a digital
value. The data are processed and evaluated by software. An alarm will be released
if the measured signal level exceeds the alarm level set by the provider via software.
Note: If the Node C is equipped with a diversity path, both values will be
combined before the RSSI evaluation. Thus, only one UL value is
reported.
The current RSSI values can be checked in the "Status and Reports" menu
accessible via the home page of the web interface (see figure 4-4).
5.2.5 Alarmforwarding
Alarms can be forwarded to a defined phone number or to the OMC if the Node C is
equipped with a modem or a mobile station. This enables the provider to control and
to query the status of the network. Faults and irregularities can be recognized and
eliminated.
With an optional modem the Node C also provides an SMS feature, by which the unit
is able to send out alarm messages as SMS. For further details please contact your
supplier.
ID No: 161692 PRELIMINARY Page 73