Datasheet > M48-458-BHX2-EAS

M48-458-BHX2-EAS

更新时间： 2022-02-26 12:43:46

品牌	Logo	应用领域
RADIOMETRIX		/
页数	文件大小	规格书
11页	310K
描述
500mW UHF NBFM multi channel radio modem

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M48-458-BHX2-EAS 数据手册

Hartcran House, 231 Kenton Lane, Harrow, Middlesex, HA3 8RP, England

Tel: +44 (0) 20 8909 9595, Fax: +44 (0) 20 8909 2233, www.radiometrix.com

Issue 1, 31 October 2012

M48-458-BHX2

500mW UHF NBFM multi channel radio modem

The M48-458-BHX2 presents M48 modem IC

combined with a BHX2 radio module and suitable

interface circuits, power supplies, connectors to

provide a complete RS232 radio modem interface.

Optionally, the board can be housed in an EAS120

extruded aluminium housing. In the simplest case, a

pair of these units (with suitable aerials and power

supplies connected, of course) can be connected

directly to the serial ports of a pair of industrial PCs

and the resulting wireless data link used without any

further installation or programming.

The M48A is a simple, half duplex, transparent data link device. It

provides a basic 4800 baud RS232 compatible path without the user

needing to format, code, detect or otherwise worry about modifying

his existing datastream or providing extra 'control' lines. The

user interface datarate, addresses and operating parameters

can all be easily re-programmed via the serial port.

Figure 1: M48A-458-BHX2-EAS

It ought to be emphasised that the M48A is a very simple, easy to use, device. As supplied, it operates as a

4800 baud, transparent half-duplex data link. If required, there is an extensive range of programming

options, allowing user interface speed from 1200 to 76800 baud, hardware flow control, one to one, one to

many and broadcast addressing options, and acknowledge/re-transmit error handling protocols. Simple store

and forward repeater operation is also provided.

A good demonstration can be had by connecting a pair of PCs by their serial ports and a null-modem cable,

and setting up terminal emulators (4800 baud, asynchronous, local echo on) on both computers. Confirm

that good RS232 communication is present, and then replace the cable with a pair of M48A modems. The

resulting 'radio teletype' can be entertaining to play with.

Features

ꢀ

Usable range over 5km

500mW RF power output

128 serial select channels

5kbps pulse duration coded protocol

Synchronisation codes and checksum to reduce false triggering on noise

Programmable transmit address and four receive addresses

Programmable timing parameters (preamble length, etc)

Programmable auxiliary serial output (to program radio modules)

Programmable serial modem baud rate (1200 - 76800 bps, half-duplex)

Addressable point-to-point and point to multi point

Packet acknowledge/resend (ACK) mode

Store and forward repeater function

Applications

ꢀ

PDAs, organisers & laptops

Handheld / portable terminals

Remote operated vehicles

Data loggers

In-building environmental monitoring and control

Industrial (SCADA) telemetry and M2M systems

Fleet management, vehicle data acquisition

Radiometrix Ltd, M48A-458-BHX2 modem manual

page 1

12 3 4 5 6 7...11

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