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9

MINIATURE LOCAL MULTIPLEXOR

2. Description

The Miniature Local Multiplexor combines two
asynchronous or synchronous signals and sends the
composite signal over a 4-wire (two twisted pairs)
communication line (see Figure 1 for a typical
application). The multiplexor has an internal short-haul
modem that uses an internal clock. 

It will not operate in

applications that require slaving to an external clock

. Setting

the baud rate at higher speeds for asynchronous
transmission allows more sampling per bit and
minimizes the timing distortion.

Figure 1. Typical Application.

Miniature Local

Multiplexors

Computer

Terminals

Содержание MX867A

Страница 1: ...the U S Call 877 877 BBOX outside U S call 724 746 5500 FREE technical support 24 hours a day 7 days a week Call 724 746 5500 or fax 724 746 0746 Mailing address Black Box Corporation 1000 Park Drive...

Страница 2: ...ent is operated in a commercial environment Operation of this equipment in a residential area is likely to cause interference in which case the user at his own expense will be required to take whateve...

Страница 3: ...a o lavabo s tano mojado o cerca de una alberca etc 6 El aparato el ctrico debe ser usado nicamente con carritos o pedestales que sean recomendados por el fabricante 7 El aparato el ctrico debe ser mo...

Страница 4: ...a los contactos y recept culos donde salen del aparato 14 El equipo el ctrico debe ser limpiado nicamente de acuerdo a las recomendaciones del fabricante 15 En caso de existir una antena externa debe...

Страница 5: ...4 MINIATURE LOCAL MULTIPLEXOR TRADEMARKS USED IN THIS MANUAL Any trademarks mentioned in this manual are acknowledged to be the property of the trademark owners...

Страница 6: ...5 MINIATURE LOCAL MULTIPLEXOR Contents Chapter Page 1 Specifications 6 2 Description 9 3 Installation 10...

Страница 7: ...ormat Synchronous Full duplex transparent to protocol Asynchronous Full duplex transparent to character length and code parity bits stop bits data rate protocol and break signal Flow Control Software...

Страница 8: ...0 2 mm 1 0 mm 1200 2 5 mi 4 km 4 mi 6 km 5 mi 8 5 km 2400 1 9 mi 3 km 2 8 mi 4 5 km 4 mi 6 5 km 3600 1 6 mi 2 5 km 2 8 mi 4 5 km 3 4 mi 5 5 km 4800 1 6 mi 2 5 km 2 5 mi 4 km 3 1 mi 5 km 7200 1 6 mi 2...

Страница 9: ...km 3 1 mi 5 km 4800 1 6 mi 2 5 km 2 2 mi 3 5 km 2 8 mi 4 5 km 9600 0 9 mi 1 5 km 1 2 mi 2 km 2 5 mi 4 km Overvoltage Protection AC DC overvoltage protection circuits connected via isolation transform...

Страница 10: ...see Figure 1 for a typical application The multiplexor has an internal short haul modem that uses an internal clock It will not operate in applications that require slaving to an external clock Setti...

Страница 11: ...Terminal Block Locations 1 Remove the cover of the Miniature Local Multiplexor by pressing the four tabs located on each side of the unit and lifting the top half of the cover from the bottom half SYN...

Страница 12: ...ous operation cannot be faster than 9600 bps 3 Connect the 4 wire cable to the 4 screw terminal block NOTE The transmit pair at the local site must be connected to the receive pair at the remote site...

Страница 13: ...1000 Park Drive Lawrence PA 15055 1018 724 746 5500 Fax 724 746 0746 Copyright 1999 Black Box Corporation All rights reserved...

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