Base Station Controller (BSC 2212)

/Base Station Controller (BSC 2212)
Base Station Controller (BSC 2212) 2017-10-22T10:26:43+00:00

Base Station Controller-2212 is the central component of RM Mobile Data system.

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.

Provides error-free, digital communication between a host computer and multiple mobile units, over a full-duplex, FM radio channel.

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.

Uses a specially-developed host message protocol that guarantees fast and accurate communication with the host.

Radio Protocol

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

Radio Interface

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

Environmental

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

Weight   3 lb