VCom Inc.
BST1918 Manual; ml_bst1918_02 (Sept 2005)
Approved: C.H.
6
1.0 GENERAL INFORMATION
1.1 System Overview
The BST1918 combines low noise high power transceiver(s) and sophisticated management capability to
offer a radio solution for 1.9 GHz
BWIN
TM
BASED
ON
DOCSIS
TM
base stations. Out-of-band signaling over the
single cable connection with the VCom BST1918 allows for full SNMP management (via the WM4040) of the
operational parameters. Built-in power detectors allow for easy input and output level configuration.
1.2 BST1918 Features
•
High output power: +31 dBm carrier level with 64QAM
•
Automatic transmit power control automatically corrects for cable loss and input level changes
•
RF output mutes when changing output configuration or in a switchover situation
•
Low noise: <4 dB including duplexer loss
•
Digital temperature compensation to guarantee specifications over full operating temperature range
•
All local oscillators are frequency synthesized and locked to a common high stability reference from the WM4040
•
FLASH memory for easy software updates
•
Externally connected antennas (60
°
, 90
°
, 120
°
, Omni)
•
High reliability, state-of-the-art design using microstrip, MMIC and surface mount technology
•
Conservative component derating and 100% burn in help ensure reliable operation
Full SNMP management when combined with the WM4040:
Monitors
Controls
Alarms
Transmit IF Level
RF Output Power Setting
Phase Lock Lost
Transmit RF Level
RF Output Power Mode (closed-loop power control,
open loop gain control)
Overheating
Receive IF Level
RF Output Mute
Loss of Transmit IF
Internal Temperature
Receive Gain
Transmit RF Level
Module Serial Numbers
Transmit Phase Lock
Receive Phase Lock