202T Private Line Modem

Private Line FSK Analog Asynchronous Modem

Full duplex to 1200 bps Asynchronous RS-232 4-wire, full duplex or 2-wire, half-duplex line application 900 Hz soft carrier turn off Anti-streaming Standalone or rack mount High stability transmit and receive frequency Ruggedized for full temperature range Quiet multi-layer board Fully compatible with other 202T's

FEATURES
DESCRIPTION
SPECIFICATIONS

General
Indicators
Switches
Physical and Electrical

HOW TO ORDER

FEATURES

• Full duplex to 1200 bps
• Asynchronous RS-232
• 4-wire, full duplex or 2-wire, half-duplex line application
• 900 Hz soft carrier turn off
• Anti-streaming
• Standalone or rack mount
• High stability transmit and receive frequency
• Ruggedized for full temperature range
• Quiet multi-layer board
• Fully compatible with other 202T's

DESCRIPTION

SPECIFICATIONS

General

• Analog full duplex, 4-wire, 600 ohm balanced, Frequency Shift Keying
• Analog half duplex, 2-wire, 600 ohm balanced, Frequency Shift keying
• Mark-1200 hertz, Space-2200 hertz, Speed 0 to 1200 bps
• 900 Hertz Soft Carrier Turn Off for multidrop operation
• Transmit level control 0 dBm or -16 dBm
• Receive level 0 dBm to -42 dBm
• Carrier Turn-on time less than 12 msec
• Will drive up to 30 Km of cable depending upon wire gauge
• Switched carrier or constant carrier operation (RTS forced on or terminal controlled)

• RS-232, DB-25S
• Signals are Tx, Rx, RTS, CTS, DSR, DCD
• RTS/CTS delay is 12 or 20 ms in switched carrier mode or RTS can be forced on
• Rx data is clamped to mark when no receive carrier detect is present.
• 202T Modem - FSK Analog Modem, Async

Controls and Indicators

• Power, Tx Data, Rx Data, RTS, CTS, DCD, Test
• Digital loop via rear panel switch and front DIP switch
• Controlled carrier (with RTS/CTS delay) or constant carrier with RTS/CTS on
• anti-streaming option (8 seconds), Loopback or normal operation
• Transmit level - 0 db or -16db, 900 Hz Soft Carrier turn off On or Off

Physical and Electrical

• -40C to +70C operating temperature range, PC ISA bus format or standalone version,
• PC bus for power and ground only, standalone unit uses 110V wall mount supply
• Half size PC card, 7.25"D x 4.25"H
• Stand alone: 5.5" W x 7.375"D x 1.5" high, 110VAC wall mount supply (9VDC, 500 ma)
• Other DC power supply voltages, 12, 24, -48, 125 VDC, 220VAC available on special order
• A 1.5" x 19" fixture available to rackmount up to 3 standalones in a single 1U height
• 20 slot rack chassis on slide guides is 19"W x 16"D x 7"H, 110VAC 250 W power supply

Switches

OPTION SWITCH SETTINGS 
Switch                        DOWN                        UP
1 - Reset                Off                        Toggle Up/Down        
2 - Anti-streaming        Off                        On        
3 - RTS/CTS delay        12 ms                        20 ms
4 - RTS control                Forced on                Controlled by Terminal        
5 - Soft Carrier Turnoff        Off                        On
6 - Reserved                -                        -
7 - Transmit Level        -16 dB                        0 dB
8 - Loopback                Loopback Active                Off

APPLICATION

Standalone rack fixture - 18.95" x 1.5" high	Single Unit Rack Mounts

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