Telenetics MOT202T manual Functional Description, Power Requirements, Environmental Specifications

Page 2

25111 Arctic Ocean Drive Lake Forest, CA 92630

tel. 949.455.4000 fax. 949.455.4010 www.telenetics.com

Specifications*

FUNCTIONAL DESCRIPTION

General

 

Data Rate

From 0 to 1800 bps (baud) depending

 

on transmission facility

Modulation

Phase-coherent Frequency shift keying

 

(FSK).

Line Impedance

600 ohms ± 10 %, transformer coupled

 

and transient protected

Operation

The modem operates at full duplex or

 

half duplex over four-wire lines, or

 

half-duplex only over two-wire lines.

 

It operates asynchronously.

Receive and

Space:

2200

Hz

Transmit

 

Mark:

1200

Hz

Frequencies

Soft carrier:

900

Hz

 

 

Timings

 

All

settings and

timings are

 

 

controlled by jumpers on the modem

 

 

board.

 

 

Anti-streaming

Option to turn transmitter OFF after a

 

 

selected time, even if Request To Send

 

 

is ON

 

 

Test Features

The modem employs a rotary switch

 

 

that selects these test options:

 

 

¥

Data Mode

 

 

 

 

¥

Self Test

 

 

 

 

¥

Analog Loop back

 

 

 

¥

Digital Loop

back

 

 

 

¥

Test Pattern

Transmit

 

Indicators

The

modem has LED indicators for the

 

 

following interface circuits:

 

 

RTS, CTS, DCD, RD, TD, TM (Test Mode)

 

 

and PWR.

 

 

Receiver

 

 

 

 

 

Receiver

Center

1700Hz ± 16 Hz

 

 

Frequency

Tolerance

 

 

 

Receiver Performance The modem receiver will operate with the following performance at 3002/C2 or M1025 lines

1200Bps:

B.E.R. equal to 1 x 10-5with 12 db

 

signal to noise ratio

1800Bps:

B.E.R. equal to 1 x 10-5with 18 db

 

signal to noise ratio

Carrier Detect

The received carrier detect threshold can

Threshold

be configured by the on-board jumper.

With jumper option:

DCD off on

Carrier stronger than Ð30 dBm

OR

 

DCD off on

Carrier stronger than Ð45 dBm

Hysteresis:

Approximately 2 dB

Receiver Dynamic

0 dBm to Ð 43 dBm

Range

 

Transmitter

 

 

 

 

Transmit

FrequencySpace frequency:

± 0.1

%

Tolerances

Mark frequency:

± 0.1

%

 

 

 

 

Soft Carrier frequency:

± 0.1

%

Transmit

Levels

The modem transmit level is

 

 

 

 

selectable from 0 dBm to Ð 14 dBm in

 

 

2

dB steps by the on-board jumper S2-

 

 

1

to 8.

 

 

POWER REQUIREMENTS

Rack & Standalone

AC Power

20 VAC RMS @ 150 mA, centertapped.

 

10 VAC RMS @ 225 mA.

 

115VAC &

220/240VAC

DC Power

+15

VDC

referred to gnd

 

-15

VDC referred to gnd.

 

+8.5 VDC

referred to gnd.

ENVIRONMENTAL SPECIFICATIONS

Operating Temperature

-40

to

+

85

degrees C

Storage

Temperature

-40

to

+

85

degrees C

Relative

Humidity

95%,

non-condensing

INTERFACE SPECIFICATIONS

Analog Line edge An 8-pin edge connector located at

connectorthe backend of the modem board. The four signals routed to and from this connector are the analog transmit and receive pairs. Each pair are fully differential signals.

Pin Signal Name

Function

3

DTR

Receive

Line for four wire systems

4

DTX

Transmit/Receive Line for two wire systems

5

DRX

Transmit/Receive Line for two wire systems

6

DRR

Receive

Line for four wire systems

The maximum data rate for this modem is:

0 to 1200 bps (baud) over ITU M.1025 or BELL 3002 Basic services.

0 to 1800 bps (baud) over ITU M.1020 or BELL 3002 C2 conditioned lines.

Interface Compatibility

The modemÕs line interface is compatible with the Bell Systems/WE 202 specifications and with the ITU V.23 recommendation.

The modemÕs data interface is compatible with the RS 232C specifications and with the ITU V.24/28 recommendations.

Document #0071 0700

Telenetics is registered trademark of Telenetics Corporation. All other trademarks are the property of their respective holders. ©2000

Image 2
Contents MOT202T Interface Specifications Power RequirementsEnvironmental Specifications Pin Signal Name FunctionPin Voltage Function RTS/CTS DelayData Carrier Detect Delay Data Carrier Detect Level