UDS 202T

202T Frequency Shift Keyed (FSK) modem

UDS 202T 202S 202S/T 202S/D,  desk top and rack cards - 
VDC power modem - "new and used units" in stock

Stand Alone 202T    62025197
Rack Card 202T      62025209
DC Powered 202T   62025266         

 jump to Related pages - jump to UDS Motorola -  jump to SCADA Modems - jump to SCADA CSU/DSU -  jump to Cellular Modems 

UDS 202T

see the new MOT202T
       jump to MOT202T

DESCRIPTION & FEATURES

The UDS 202T modem features built-in diagnostic and anti-streaming capabilities. The anti-streaming capability prevents a modem from remaining in the transmit mode when the modem is not actively transmitting data. The diagnostic features allow the user to verify transmitted and received data. The specific features are.

202T_120_JPG.jpg (12272 bytes)
  • 2-wire half duplex or 4-wire full duplex private line operation 
  • 0 to1,200 bps data rate over unconditioned lines and 1,800 over high quality lines
  • Integral test features
  • Antistreaming
  • Phase coherent,
  • frequency shift keyed (FSK) modulation
  • RS-232 and CCITT V.24 interface
  • LED indicators
  • Front panel rotary switch function selector
  • Modem card may be interchanged between the stand alone enclosure and the Universal Data Shelf Multiple modem, enclosure

The Universal Data Systems 202T is a Frequency Shift Keyed (FSK) modem which is designed for asynchronous operation at 0 to 1800 bps with C2 line conditioning, or 0 to 1200 bps asynchronous operation on unconditioned lines. The modem provides half duplex communications on 2 wire private lines or full duplex communications on 4 wire private lines, and is ideal for use in multipoint networks.

The 202T is a single printed circuit card enclosed in a new compact size housing. The unit features an integral anti-streaming protection option which prevents network Tie-ups by incorporating a delay timer that will disconnect a modem, if it remains in transmit mode longer than a selectable period of time. The 202T also features strap options for Request to-Send/Clear to Send Delay timing, Transmit Carrier, local Copy Squelch, Turnaround squelch, Soft Carrier Turn Off, Carrier Detect Level, Carrier Detect Delay, and Test Generator Baud Rate Select. These strap options allow the user greater control of the modem, for his individual application.  

 The UDS 202T standalone modem is designed to be interchangeable between the Universal Data Shelf multiple modem enclosure and the stand alone modem enclosure. By removing the modem card and attaching the optional front panel, the modem can be directly inserted into the Universal Data Shelf. With this feature, a data-communications facility can be easily upgrade front multiple standalone enclosures to a centralized rack without the expense and trouble of purchasing new modems.

Additionally a single 202T may be mounted in a standard 19" equipment rack via the UDS models RM16M Model 1 through model 29.  

SPECIFICATIONS

Data Rate: 0 to 1200bps asynchronous over unconditioned                       lines

Operation: Full duplex over 4 wire private lines or half  
                   duplex over 2-wire private lines

Modulation: Phase coherent, frequency shift keyed (FSK)

Carrier Frequencies: Mark: 1200 Hz Space: 2200 Hz

Line Impedance: 600 ohms 10% transformer coupled and                                transient protected

Transmitter Output Level: Selectable from 0, to -12
                                             dbm in 2 dbm steps

Clear to Send Delay: 8.3 rns, 33.2 ms, 59.9 ms, or
                                    219.6 ms (selectable)

Carrier Detect Delay: 6 ms or 23 ms

Digital Interface: EIA RS-232 and CCI1l V.24

Turnaround Squelch: 0 ms, 8.3 ms, or 159.6 ms

Antistreaming: 4, 7.6, 14, 28, 56, none (selectable)

Soft Carrier Turnoff: 0 ms, 8.3 ms, or 26.6 ms

Environmental: 0 to 50° C; 95% humidity, noncondensing
                          Optional Temperature rated modem
                          -30° to +70°C

Mechanical: Width: 7"; Height 2.25"; Depth: 9.60"; Weight                         3.0 Ibs.

AC Power Requirement:115 VAC single phase,
                                         47 to 63 Hz @ 10 watts maximum

DC Power Requirements: 12 to 60 VDC

Certification: FCC Rules, Part 15 certified, CSA certified,
                     DOC certified

 CONTROLS AND INDICATORS

Test Operate Switch

DL (Digital Loopback); When the switch is in the ST position, the received data is looped back into the transmitter and the data is transmitted to the remote end. The modem must be in the 4 wire mode.

TTP (Transmit Test Pattern): When the switch is in the TTP position, the transmitter is forced ON and transmits the date from the dot pattern generator to the COMM Line. The RS-232 interface lines to the transmitter are not active (RS, CS, TD).

DATA: The switch must be in the DATA position for all normal data transmission Indicators

RS (Request to Send): is illuminated when the RS line is high (ON)

CS (Clear to Send): ON when the CS line is high (ON)

CD (Carrier Detect): ON when a carrier is detected by the modem receiver.

RD (Receive Data): On when data is received, decoded, and furnished to the terminal equipment. RD is also ON when the receive cats line goes into a space condition, OFF in a mark condition.

TD (Transmit Data): Responds in the same manner as the RD LED, but only when data to be "transmitted" is furnished to the modem. However, the LED may be on when the DTE is disconnected.

TM (Test mode): Active when Test switch is in any test mode. The indicate' will blink OFF1ON when errors occur in Self Test mode

POWER: ON when power is applied to the modem.

  ARC ELECTRONICS
jump to ... Home Page

301-924-7400 EXT 25 301-924-7400 EXT 25 fax 301-924-7403