SL-900

Wireless Spread Spectrum Modem

A pair of SL-900s provides a practical and reliable alternative to using traditional analog phone-line modems or "null-modem" serial cable (RS-232) connections for data communications between serial communications equipment. Moreover, wireless data communications using the SL-900 means you will benefit from: greater flexibility and freedom to relocate serial communications equipment; reduced cabling hassles; eliminated requirement for access to wire-based transfer media such as telephone lines; no ongoing access fees; and, the ability to communicate through walls, floors and many other obstacles.

Features of the SL-900

Transmission within a public license-exempt band of the radio spectrum (this means that the SL-900 can be used without access fees such as those incurred by cellular airtime)  DB9 RS-232 serial I/O data port with hardware flow control (allowing the SL-900 to interface with virtually any communications device with an asynchronous RS-232 port such as a computer)  Supports point-to-point and point-to-multipoint, repeater operation with user-configurable addressing  No limit on the number of repeaters you can cascade. User-configurable encryption key maximizes security and privacy of communications  Twenty different user-selectable pseudo-random hopping patterns to offer the possibility of separately operating multiple networks while providing security, reliability and high tolerance to interference  Built-in CRC-16 error detection and auto re-transmit to provide accurate and reliable data User selectable FEC  FCC (Federal Communications Commission) and IC (Industry Canada) approved

Technical Specifications

Data Interface     Asynchronous RS-232, 9-pin female D-sub    Signals     Sig. Gnd, TX, RX, DCD, DSR, DTR, RTS, CTS    Data Format     8N1,8N2,8E1,8O1,7N1,7N2,7E1,7O1,9N1    User Interface     AT command line interface    Bandwidth/Data Rate    1 2400 - 115,200 bps, uncompressed half-duplex     Communications Range    2 20 miles line-of-sight or more    Memory     Non-volatile configuration memory    Operating Modes    3 Point-to-Point, Point-to-Multipoint, Repeater-Slave    Power Requirements     9-30 VDC, 1 Amp    Power Consumption     490 mA (Max) at 1W transmit, 200 mA receive (12VDc input)     Frequency     (North American Version)   4 902 - 928 MHz    System Gain     137 dB    Sensitivity     -107 dBm  @ 10-6    Minimum Signal for Synchronization     -110 dBm    Out of Band Rejection     >70dB    Inband Rejection     >60dB    Adjacent Channel  Rejection     >50dB    Output Power     1mW, 10mW, 100mW, 1W (user-configurable)    Spreading Code     Frequency Hopping    Hopping Patterns     60 pseudo-random, user selectable    Error Detection     CRC-16 with auto-retransmit, FEC    Enclosure Material     Milled aluminum, raven-black baked powder coat finish    Dimensions (WxDxH)     Encl: 3.72" x 4.25" x 1.72" (95 x 108 x 44mm)    Antenna Connector     Reverse gender TNC    Weight     Approx. 420 grams    Operating Environment    5 Temperature: -40 to +70°C; Humidity: 5 to 95% non-condensing    Approvals     FCC, IC         1. Other baud rates are available.         2. Line of sight with unity gain  antennas         3. Repeater also function as Slaves. There is no limit on the how many repeater you can deploy.          4. Other versions available for Australia and New Zealand.         5. Optional -40 to +85°C available.