CommScope Inc. of North Carolina AIRBRIDGE-AP ユーザーズマニュアル
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1.0 General Information
1.1 Overview
AirBridge™ is a wireless access solution designed to extend DOCSIS
®
or other services via strand or
pole mounted access points. The radio system consists of an access point (AP) and a subscriber unit
(SU). The AP mounts to the strand (CATV cable) and provides a point-to-point or point-to-multipoint radio
link in the 5.8 GHz UNII (Unlicensed National Information Infrastructure) band to several SUs located
about a mile away. The AP functionality includes powering from the strand, remote control and
monitoring via SNMP, and transmission and reception of standard DOCSIS
(SU). The AP mounts to the strand (CATV cable) and provides a point-to-point or point-to-multipoint radio
link in the 5.8 GHz UNII (Unlicensed National Information Infrastructure) band to several SUs located
about a mile away. The AP functionality includes powering from the strand, remote control and
monitoring via SNMP, and transmission and reception of standard DOCSIS
®
or other signals at the levels
found at a regular cable tap point. The SU will interface with a standard cable modem.
The AirBridge™ system provides a wireless entry point to the HFC (hybrid fiber/coax) network, extending
access to locations that may, due to cost or time constraints, be unable to connect to the system.
The
The AirBridge™ system provides a wireless entry point to the HFC (hybrid fiber/coax) network, extending
access to locations that may, due to cost or time constraints, be unable to connect to the system.
The
AP5800 includes an integrated DOCSIS 1.1 cable modem for communications and control. Note that
the data passing over the wireless network does NOT pass through the cable modem, so the cable
modem does not limit data rate or features available over the wireless link. In the downstream direction,
the AP5800 includes a repeater that demodulates the downstream data, removes noise and errors, and
remodulates. This ensures a top quality signal on the wireless link, independent of the quality of the
CATV signal.
modem does not limit data rate or features available over the wireless link. In the downstream direction,
the AP5800 includes a repeater that demodulates the downstream data, removes noise and errors, and
remodulates. This ensures a top quality signal on the wireless link, independent of the quality of the
CATV signal.
1.2 Module Features
• Average 1-mile range
• Wide upstream gain range
• Excellent upstream noise figure performance
• Downstream output mutes if there is no valid input signal
• Reports power level of burst upstream signal
• Upstream can be set to auto mode, which minimizes noise put onto the cable system by keeping the
• Wide upstream gain range
• Excellent upstream noise figure performance
• Downstream output mutes if there is no valid input signal
• Reports power level of burst upstream signal
• Upstream can be set to auto mode, which minimizes noise put onto the cable system by keeping the
upstream output muted until there is a signal to transmit
• High reliability, state of the art design using microstrip MMIC (Monolithic Microwave Integrated Circuit)
and surface mount technology
• Conservative component derating and 100% burn in help ensure reliable operation
• Automatically tunes to downstream CATV frequency
• Internal modulator/demodulator regenerates signal for optimum downstream SNR
• Internal modulator/demodulator regenerates signal for optimum downstream SNR
1.3 System Features
• Local control via RS232 command line interface
• Remote control via SNMP v1.1 (Simple Network Management Protocol)
• Flash memory for easy firmware upgrades
• Firmware upgradeable via TFTP (Trivial File Transfer Protocol)
• Internal power supply requires only 35-90 VAC power supplied on strand for operation
• Remote control via SNMP v1.1 (Simple Network Management Protocol)
• Flash memory for easy firmware upgrades
• Firmware upgradeable via TFTP (Trivial File Transfer Protocol)
• Internal power supply requires only 35-90 VAC power supplied on strand for operation
1.4 Options
The AP is available with the following options:
Mounting:
Mounting:
Strand This includes brackets and clamps to mount the radio in a horizontal orientation to the
cable strand. The internal antenna is mounted to produce a horizontal polarization by default.
Pole This option includes a mounting bracket and cable-based clamp to secure the radio to a
wooden or metal utility pole from 4” to 14.5” diameter, in a vertical orientation. The internal antenna is
mounted to produce a horizontal polarization by default.
mounted to produce a horizontal polarization by default.
Pipe This option is the same as the pole mount, except a shorter cable-based clamp is provided.
An internal antenna is provided in the radio. The antenna is oriented based on the type of mounting
selected. By default, the antenna is horizontally polarized, 60° horizontal beamwidth and 30° vertical
beamwidth. The antenna has a 14 dBi nominal gain, but with cable and radome loss, the effective gain is
12 dBi.
selected. By default, the antenna is horizontally polarized, 60° horizontal beamwidth and 30° vertical
beamwidth. The antenna has a 14 dBi nominal gain, but with cable and radome loss, the effective gain is
12 dBi.