The Antenna System Monitor (ASM) is used to measure channel-specific Tx Forward and Reflected power for up to 80 channels. The measurement of associated Rx Channels (and or other frequencies) is also available. The unique capability to perform a series of Tx-to-Rx system isolation (loop back), Rx sub-system passband gain response, and Transmitter isolation (Tx carrier rejection) tests is also provided. Four pairs of Tx Forward (FWD) and Tx Reverse (RFL) coaxial connector inputs fed from non-intrusive in-line directional couplers give the ASM the capability of monitoring the output of up to four (or more) separate transmitter combiner/antenna systems at a site. A Receive input port fed from either the site's receiver multicoupler system (and/or an external “off-air” antenna or DAS) gives the ASM the capability of monitoring receiver system signal levels, or the propagation from transmitter channels located on other sites.
Tx measurements are made using a high-directivity high-power PIM and PIP rated in-line coupler connected in the Tx combiner antenna output line. This low insertion loss coupler allows continuous 24x7 non-intrusive measurement and monitoring to be performed. All measure frequencies, channel bandwidths, alarm level thresholds and other parameters are user-configurable. A DB15 rear mounted connector also provides alarm reporting outputs that can be hardwired into external site monitoring equipment if desired. LED indicators on the front panel of the ASM allow visual confirmation of alarm conditions, and the status and configuration of the ASM is facilitated through the use of a user-friendly on-board webserver GUI.
Features include:
- Monitoring of up to 80 channels in multi-channel, digital and analogue wireless communications systems.
- Measurement of Tx Forward, Reverse (VSWR), and Rx (RSSI) level on a per-channel basis.
- Measurement of Tx-to-Rx Antenna Isolation, Rx (or TTA) system gain, Tx carrier rejection.
- 24x7 continuous and non-intrusive measurement of all parameters.
- Multiple separate paired FWD and REF inputs to accommodate single or combined transmitter inputs.
- Summary or individual fault outputs for each measurement parameter.
- SNMP v2C, SMTP (Email), UDP Manager Messages, or dry relay contact alarm outputs
- ASM supplied with one Antenna Line Coupler (additional couplers may be ordered separately if required).
- Add Site Alarm Modules (SAM) for temperature, analogue voltage, digital I/O, and multiple relay outputs.
Tx measurements are made using a high-directivity high-power PIM and PIP rated in-line coupler connected in the Tx combiner antenna output line. This low insertion loss coupler allows continuous 24x7 non-intrusive measurement and monitoring to be performed. All measure frequencies, channel bandwidths, alarm level thresholds and other parameters are user-configurable. A DB15 rear mounted connector also provides alarm reporting outputs that can be hardwired into external site monitoring equipment if desired. LED indicators on the front panel of the ASM allow visual confirmation of alarm conditions, and the status and configuration of the ASM is facilitated through the use of a user-friendly on-board webserver GUI.
Features include:
- Monitoring of up to 80 channels in multi-channel, digital and analogue wireless communications systems.
- Measurement of Tx Forward, Reverse (VSWR), and Rx (RSSI) level on a per-channel basis.
- Measurement of Tx-to-Rx Antenna Isolation, Rx (or TTA) system gain, Tx carrier rejection.
- 24x7 continuous and non-intrusive measurement of all parameters.
- Multiple separate paired FWD and REF inputs to accommodate single or combined transmitter inputs.
- Summary or individual fault outputs for each measurement parameter.
- SNMP v2C, SMTP (Email), UDP Manager Messages, or dry relay contact alarm outputs
- ASM supplied with one Antenna Line Coupler (additional couplers may be ordered separately if required).
- Add Site Alarm Modules (SAM) for temperature, analogue voltage, digital I/O, and multiple relay outputs.
| Frequency MHz | 746 to 870MHz |
| Frequency Range | (Tx power and Rx level monitoring) 746-870MHz |
| Freq. Channel Step Size (Transmit and receive bands) | 1.25 kHz |
| DC Power Connector | Polarised 2-pin Phoenix connector |
| Power Supply | 11-36VDC, 36-60VDC or 100-240VAC (note # 2) |
| Operating Temp. Range | -30° C to +60° C / -22° F to 140° F |
| Available Rx RSSI level monitoring ports | 1 |
| Rx monitoring port input range | -110dBm to -50dBm |
| Channel measurement bandwidths | 12.5kHz and 25kHz |
| Max spurious or IM products level | -30dBm |
| Conducted emissions | Complies with FCC Part 15 (15.207) |
| Radiated emissions | Complies with FCC Part 15 (15.209) |
| RF Termination connectors | N (F) |
| Communication interface port | 2 x rear mounted TCP/IP Ethernet ports (RJ45) |
| Visual alarm notification | Front panel mounted LED’s |
| Configurable alarms | Summary Fault/ Tx FWD power / VSWR / RSSI (Ant Isolation) |
| Mounting | 2RU 19” rack mounting |
| Dimensions | 483x50x89mm / 19x2x3.5” (incl connectors) |
PDF Downloads
- Antenna System Monitor - ASM7487
- User's Manual ASMxxxx Series 284
- ASM Quick Start Guide QSG
- Antenna System Monitoring Application Note
- Antenna Monitoring White Paper
- Tech Tip - What is SNMP
- Antenna System Monitor Product Overview
- Service Bulletin - ASM Summary
- Service Bulletin - ASM Firmware Upgrade
- Service Bulletin – ASM SD Card Replacement
- Service Bulletin - ASM SNMP
- Service Bulletin - ASM001
- Service Bulletin - ASM002
- Service Bulletin - ASM003
- Service Bulletin - ASM004
- Service Bulletin - ASM005
- Service Bulletin - ASM006
- Service Bulletin - ASM007
- Service Bulletin - ASM008
- Service Bulletin - ASM009
- Service Bulletin - ASM010
- Service Bulletin - ASM011
- Service Bulletin - ASM012
- Service Bulletin - ASM013
- Service Bulletin - ASM014
- Service Bulletin - ASM015
- Service Bulletin - ASM016
- Service Bulletin - ASM017
- Service Bulletin - ASM018
- Service Bulletin - ASM019
- Service Bulletin - ASM020
- Service Bulletin - ASM021
- Service Bulletin - ASM022
- Service Bulletin - ASM023
Software Base Line Upgrades and associated MIB files
- To download the file right click on the file and select “Save Link As”.
- RF-INDUSTRIES-MIB
- RFI-AXM-ALARM-MIB
- ASM_V2_05
- ASM_V2_10
- ASM_V2_62
- ASM_V2_84
- ASM_MAIN_V2_50d.BIN (Note: For use with Service Bulletin ASM014 only)
- Downloading a firmware update? Don’t forget to download the updated manual too.
