Base Station Controller (BSC 2212)
The BSC-2212 provides error-free, digital communication between a host computer and multiple mobile units, over a full-duplex, FM radio channel. The BSC Channel contention among the mobile units is managed by the BSC using Digital Sense Multiple Access (DSMA) techniques. Automatic Gain Control (AGC) circuits in the BSC compensate for variations in mobile signal deviation.
The BSC-2212 installs at the transmitter site, and is interfaced directly with the base radio. It automatically controls the operation of the radio during digital transmission.
Communication with the host computer is implemented over Ethernet or a RS232C data port, usually via telephone modem or microwave links from the control center. The BSC uses a specially-developed host message protocol to ensure fast and accurate communication with the host.
|Data Rate||22KB Wide Band (25Khz channels), 11Kb, Narrow Band (12Kb). Programmed ahead of time.|
|Radio Modulation||4800 bps: Nyquist Filtered Bipolar (NFB). 9600 bps: 2 level Pulse Amplitude Modulation (PAM) with spectral precoding. 22k: 4 level FSK|
|Channel Contention||Combination of Digital Sense Multiple Access (DSMA) and ALOHA|
|Forward Error Corrections||4800 bps: Modified Reed-Solomon. Single bursts of 56 bit errors are correctable. 9600 ― 22k bps: Interleaved Modified Reed-Solomon. Single bursts of 96 bit errors are correctable.|
|Address Capacity:||4800 bps: 4096. 9600 bps ― 22k: 1,048,576|
|Dynamic Group IDs:||7 maximum + All Call ID|
|CW Identifier||User programmable to 12 characters|
|Transmit Audio Level||0 ― 10 Vpp in 0.25 dB Steps|
|Transmit Driving Ability||600 ohms minimum load resistance. Stable with any output loading|
|Receive Audio Level||100 mVpp to 10 Vpp|
|Receive Input Impedance||100k Ohm|
|Equalization||DSP Equalizes transmit and receive audio distortion|
|Automatic Gain Control||4800 bps, 9600 bps: AGC in Base Station Controller receives messages with deviation between 700 Hz and 7000 Hz. 9600 bps: Adjustable AGC 4.8k ― 22k|
|Base Station||DB25P, DTE, 19k ― 56k; DCD from Telco Modem Controls Base Station Controller power; Ethernet|
|Humidity||0 ― 95% RH, without condensation|
|Altitude||SL to 10,000 feet|
|Power||BSC: 120/240 VAC or 10 ― 15 VDC auxiliary. 220mA|
|Dimensions||1.75″ H x 19″ W x 8″ D|
- Base Station Controller (BSC 2212) – click to view PDF