RAD Data comm FOMi-T1 Manual de usuario descargar pdf (Pagina 18)

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RAD Data Communications 2011 Catalog

The ASM-10/8 is a sync/async short range

modem operating full or half duplex over

twisted pair, unconditioned lines in point-to-

point applications. It has a range of up to

10 km (6.2 miles) and operates at nine

selectable rates up to 19.2 kbps.

The modem uses conditional diphase

modulation (EUROCOM Std. D1), which provides

immunity to background noise, eliminates

normal line distortion and enables efficient

transmission over twisted pair. Transmit timing

is provided internally, derived externally from the

DTE or recovered from the receive signal.

The ASM-10/8 features diagnostic capabilities

complying with the V.54 standard to perform

local and remote loopbacks.

The unit has a V.24/RS-232 interface and is

available as a standalone unit or as a card for

the 19-inch ASM-MN-214 rack that holds up to

14 cards (see page 127).

ASM-10/8

Sync/Async Short Range Modem

ASM-10/8

V.24

Sync/async

computer

Terminal

or PC

ASM-10/8

V.24

4-wire

19.2 kbps

•

Full or half duplex over 4-wire

•

Data rates up to 19.2 kbps

•

Range up to 10 km (6.2 miles) at

19.2 kbps

•

Controlled or continuous carrier

•

V.54 diagnostics

•

Automatic equalizer

Approximate Range for 24 AWG (0.5 mm)

Data Rate

(kbps) km miles

19.2 10.0 6.0

9.6 13.0 8.0

4.8 16.0 10.0

2.4 21.0 13.1

1.2 28.0 17.5

For latest updates visit www.rad.com

•

4-wire, full duplex

•

Internal filter for high noise immunity

•

Data rates up to 19.2 kbps

•

DCE/DTE switch

•

No external power required

•

Transformer line isolation

SRM-5A

Short Range Modem

The miniature SRM-5A is an asynchronous short

range modem connecting full duplex asynchronous

terminals to computers. The SRM-5A operates at

data rates of up to 19.2 kbps with a range of

4.5 km (2.8 miles) at 9.6 kbps.

The DCE/DTE switch allows operation as a DTE

for connection to another DCE, without

requiring a cross cable. It operates without

external power by drawing low power from the

data and control signals.

Connection to the line is through isolation

transformers for protection against AC or DC

overvoltages.

The SRM-5A modem is available with an internal

filter. The filter is designed to overcome radiated

and conducted interference for high noise

immunity.

Approximate Range for 24 AWG (0.5 mm)

Data Rate

kbps km miles

19.2 2.0 1.2

9.6 4.5 2.8

4.8 5.0 3.0

1.2–2.4 5.5 3.4

SRM-5A

Async

computer

4-wire

Async

terminal

SRM-5A

For latest updates visit www.rad.com

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