antenna system monitor (asm) · –when used with an optional site alarm module (sam), the asm can...
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Antenna System Monitor (ASM)
What is the ASM?
• The Antenna System Monitor (ASM) is used to monitor and measure the RF coverage performance determining characteristics of a communications site, on an individual per-channel basis, and provides network owners, operators, or end-user customers with unparalleled levels of performance monitoring and fault reporting for their communications networks. Measurements and alarm events can be logged for viewing, or downloaded for historical analysis.
• Monitoring the Tx Forward Power and VSWR on the antenna side of the transmitter combiner ensures that any RF faults that would otherwise be masked by the combiner’s isolators, and therefore not seen by the network base stations, can be monitored, measured, and have alarm conditions notified.
What does it look like?
Antenna System Monitor - Front View
Antenna System Monitor - Rear View
What can it do?
• The Antenna System Monitor (ASM) non-intrusively measures the RF
performance of a communications site on a truly ‘per-channel’ 24x7 basis,
allowing coverage performance impacting problems to be detected promptly.
The ASM provides valuable detailed information on the fault condition,
allowing appropriately prioritised maintenance activities to be decided - and
efficiently and cost-effectively actioned - depending on the nature, severity,
and impact of the fault.
What can it do?
The ASM may be used to monitor;
– Each channel’s RF Forward Power output from the Tx combiner(s),
– The Tx antenna system’s Reflected Power (VSWR) on each channels’
operating frequency,
– The received signal level (RSSI) for each channel’s Rx frequency, and/or,
– Tx signal levels from surrounding sites to confirm network RF propagation
– An inbuilt signal generator in the ASM can perform System Tx-Rx Isolation
and Rx System Gain/Loss/Ripple tests. Tx Rejection tests can also be
performed. This suite of System Isolation tests can be used to confirm
intra-system antenna isolation, Rx sub-system performance and Rx
sub-system protection from Tx carrier blocking.
What can it do?
The ASM may also be used to monitor;
– When used with an optional Site Alarm Module (SAM), the ASM can be
used to monitor a diverse array of temperature, analogue voltages, digital
inputs, and conditional Tx PTT/Trunking/Rx UNSQ/Voting Shelf operation
may also be monitored
or controlled by the ASM to
enhance its monitoring
capabilities to include
non-RF equipment
at a network site.
What can it do?
The ASM may also be used to monitor;
– The SAM also provides an additional ten (10) alarm relay outputs that can
be flexibly mapped to any of the ASM or SAM monitored measurement
parameters’ alarms.
– Up to ten (10) SAM modules may be daisy-chained onto an ASM for added
monitoring an alarm output capacity.
– SAM modules may be added to an ASM at any time, providing the ability to
increase the monitoring of other equipment at network sites as and when
desired.
What can it do?
The ASM may also be used to monitor;
– When used with an optional Receive Systems Module (RSM), the ASM can
be used to monitor multiple receive systems – as may be used in dual
diversity, redundant Rx, and hot/standby receive antenna systems.
– The ASM’s System Isolation Tests
and Rx Channels measurements
can be performed on any (or all)
of the monitored multiple receive
signal paths.
What can it do?
The ASM may also be used to monitor;
– The RSM also detects any high level RF signals between ~ 50-1000MHz
that may appear in the monitored receive signal paths, providing an alarm
indication for overloaded base station receivers (‘blocking’) that can impact
network performance.
– The RSM may be fitted to an ASM
at an time, supporting a network
technology migration path from
using and monitoring a single Rx
antenna to using and monitoring
multiple Rx antennas.
Installation
• The ASM conveniently connects into the
site’s Transmitter and Receiver
multicoupling using a low-loss PIM and
PIP rated Antenna Line Coupler fitted in
each Tx antenna feeder line, and by using
a spare port on the site’s receiver
multicoupler(s). Several Tx combiners at
a site can monitored by one ASM.
• Once installed, the ASM continuously
monitors the RF performance parameters
of each channel non-intrusively on a ‘24x7’
basis.
ASM FRONT VIEW
Tx ANTENNA 1
COUPLER TOP VIEW - MOUNTED ON 1RU FRONT PANEL
Tx COMBINER (1)
ASM REAR VIEW
ASM + 1 ANTENNA LINE COUPLER
FWD
RFL
OPTIONAL
DEDICATED Rx
MONITORING
ANTENNA FROM SPARE
PORT(S) ON
BTS Rx MUX(S)
TO ADDITIONAL COUPLERS IF REQUIRED
OPTIONAL SAM(s) or CAM(s)
1
10
to
MONITORED
CHANNELS
BTS PTT LINE
CONDITIONING
10 ASSIGNED ALARM
RELAY OUTPUTS
4 EXT ALARM INPUTS
10 EXT ALARM INPUTS
OPTIONAL RSM
4 ASSIGNED ALARM
RELAY OUTPUTS
Rx ANTENNA(s)
Configuration
The ASM features an integral webserver
with a user-friendly Graphical User
Interface (GUI) that allows the RF
measurements made on each channel,
and any alarm conditions, to be viewed.
Per-channel configuration, alarm
threshold levels, and other parameters
can also be easily configured.
SNMP alarm traps, and SMTP (Email)
alarms can also be provided for prompt
notification of performance impacting changes to normal measurement values.
Connectivity
To access and use the webserver GUI, an internet browser such as Internet Explorer, Mozilla, or Firefox is used. Connection to the ASM may be;
– “locally” via a computer using an Ethernet cable
– “locally” via a wireless router connected to the ASM (i.e. WiFi)
– “remotely” via a customer’s intra-site Local Area Network (LAN)
– “remotely” via a site linking backbone (such as microwave links, fiber, or other link technologies)
– “remotely” via a cellular router (if the ASM site is within coverage of a cellular network)
– “remotely” via an IP protocol satellite link (ideal for very remote sites)
Configuration
The ASM’s webserver GUI allows each channel’s parameters to be configured
independently. Other ASM system parameters are also user-configurable.
Monitoring
The ASM’s RF measurements for each
frequency, and any associated alarm
conditions, are presented in the GUI. Alarms
are also available as relay outputs, SNMP GET
or Alarm Traps, and SMTP (Email) messages.
Example SMTP (Email) Alarm Message
Example SNMP Alarm Trap Message
Monitoring
If optional SAM modules are connected to the
ASM, their measurements and alarm conditions
are also presented in the ASM GUI.
Summary
The Antenna System Monitor (ASM)
provides comprehensive channelised
monitoring of the RF performance
characteristics of a communications
site.
Monitoring is on a non-intrusive 24x7
basis and provides confirmation of the
site’s RF performance.
Alarm notifications can also be provided
to facilitate appropriately prioritised and
cost-effective maintenance responses
to faults.
More Information
• Antenna System Monitor (ASM) https://www.rfiwireless.com.au/multicoupling-monitoring/monitoring.html#.XON-V8gzaUk
• ASM Product Brief and User Manuals https://www.rfiwireless.com.au/multicoupling-monitoring/monitoring/antenna-system-monitor-asm3852.html#tab_downloads
• ASM Application Note, Service Bulletins, SNMP MIB files and downloads https://www.rfiwireless.com.au/multicoupling-monitoring/monitoring/antenna-system-monitor-asm3852.html#tab_downloads
• Site Alarm Module (SAM) https://www.rfiwireless.com.au/multicoupling-monitoring/monitoring/site-alarm-module.html#.XON-rMgzaUk
• SAM Product Brief and downloads https://www.rfiwireless.com.au/multicoupling-monitoring/monitoring/site-alarm-module.html#tab_downloads
• Receive Systems Module (RSM) https://www.rfiwireless.com.au/multicoupling-monitoring/monitoring/receive-systems-module-option-for-asm.html#.XON-3sgzaUk
• RSM Product Brief and downloads https://www.rfiwireless.com.au/multicoupling-monitoring/monitoring/receive-systems-module-option-for-asm.html#tab_downloads
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