USX2-433-5,USX2-433-5 pdf中文资料,USX2-433-5引脚图,USX2-433-5电路-Datasheet-电子工程世界

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Issue B, 03 April 2008

Radiometrix

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

Tel: +44 (0) 20 8909 9595, Fax: +44 (0) 20 8909 2233

USX2

PRELIMINARY DATA SHEET

Multi-

NBFM Multi-channel UHF Transceiver

USX2 is small multi-channel half duplex

UHF transceiver available for operation on

315MHz, 433MHz and 458MHz bands with

the user programmable RF power output of

up to 100mW.

USX2 offers up to 128 frequency channels

in 25kHz channel spacing. USX2 also

features

dual

VCO

which

allows

transmitter section to be operated on one

frequency while receiver on another.

Figure 1: USX2-433-5

Features

!

Conforms to ETSI EN 300 220-3 and EN 301 489-3

High performance double superhet, 128 channel PLL synthesizer

100mW RF power output: adjustable via serial command

Data rates up to 5 kbps for standard module

Usable range over 500m

Fully screened. Low profile

Feature-rich interface (RSSI, analogue and digital baseband)

Digital RSSI output

Incorporate a 1200baud modem

Re-programmable via RS232 interface

Low power requirements

Applications

!

Handheld terminals

Heavy vehicle/machine remote controls

EPOS equipment, barcode scanners

Data loggers

Industrial telemetry and telecommand

In-building environmental monitoring and control

High-end security and fire alarms

Vehicle data up/download

Technical Summary

!

Operating frequency: 315MHz (USA), 433MHz (European) and 458MHz (UK) bands

128 channels controlled via RS232 interface

16 channels selected by parallel interface

Transmit power: 100mW (+20dBm) nominal. Adjustable 0.1 – 100mW

Supply range: 3.6 - 15V

Current consumption: 100mA (at 100mW output) transmit, 25mA receive

Data bit rate: 5kbps max. (standard module)

Receiver sensitivity: -118dBm (for 12 dB SINAD)

Size: 50 x 30 x 12mm

USX2 Data Sheet (preliminary)

page 1

Radiometrix Ltd

Radiometrix Ltd

USX2 Data Sheet (preliminary)

page 2

Figure 2: USX2 block diagram

Figure 3: Provisional USX2 footprint

Pin Description

Pins

1A

2A

3A

1

2

3

4

5

6

7

8

9

10

11

Normal mode

RF Gnd

RF in/out

RF Gnd

TXD

TXE

GND

Vcc

P3

P2

P1

P0

RSSI

RXD

AF out

RF ground

To the antenna

RF ground

DC coupled input for TTL/ CMOS logic

Transmit enable.

Low = RX mode. High = TX. (10kΩ pull down)

(0V)

DC supply input (3.6 –15V)

Parallel channel select MSB

Parallel channel select

P1 - Parallel channel select

P0 - Parallel channel select LSB

DC level between 0.5V and 2.5V. 60dB dynamic

range

Open collector output of data slicer

500mV p-p audio. DC coupled, approx 0.8V bias

NC

Serial mode

Modem

mode

Serial read back

TBA

PGM in

BUSY

MOD TXD

MOD RXD

PGM in

NC

NOTES:

1.

2.

3.

4.

5.

6.

7.

8.

No inversion occurs between TXD and RXD. However AF out

is

inverted relative to TXD.

Parallel channel selects (P0-P3) and TXE are active LOW and have 47kΩ internal pullups to 3V

Open collector output RXD has a 47

kΩ

pullup to 3V.

The software incorporates a 1200 baud modem, compatible with that implemented in other

Radiometrix narrowband units ( i1200 tones and format ). Modem operation is selected by serial

command.

Main serial port (P0, P3) operates at 9600 baud. (Command set is not the same as TR2M, SMX

families). The unit is capable of operating in 'basic' parallel channel select only mode, or in serial

controlled 'expanded' mode

Transmit power can be set by serial command

RSSI can be read back as a digital value. (on P3)

If analogue transmit modulation is needed, then connect a series 1µF cap + 500kΩ trimmer (a

multiturn is advised) in the TXD circuit. Adjust trimmer for 90% of peak deviation (+/- 2.7KHz) at

mean input level.

Radiometrix Ltd

USX2 Data Sheet (preliminary)

page 3

USX2 serial interface details (version 4):

PRELIMINARY

The USX2 user interface is accessed through the four parallel pins (P0/serial through P3).

It has four operating modes:

1.

Parallel.

Frequency of operation is selected as one of 16 (chans 0-15), by means of a 4 bit inverted value

applied to P0-P3. The P0 pin will also respond to a LOCKSERIALMODE datastream (inverted rs232, 9600

baud), which will cause the radio to enter

serial

mode. In parallel mode, the IDENT command string is still

decoded, but the unit remains in parallel mode.

2.

Serial.

Frequency of operation, radio set up, power output and various other parameters are controlled by

command strings sent to P0. Pin P3 functions as a 'readback' port while P1,2 are not used in this mode.

In this mode, decimal values are used (to simplify direct manual programming via a terminal)

Commands include :

:

?

or

/

<cr>

PARALLEL

DUMP

MODEM

NOMODEM

DEFCH ccc

DEFPOW pp

CHAN

ccc

POWER pp

RSSI

SHORT

empty command buffer

read back buffer contents

delete last character

process buffer

return to the basic,

parallel

mode (and turn modem off)

read back contents of eeprom (output on P3)

activate 1200 baud modem

#

de-activate 1200 baud modem

#

set default channel

set default tx power

jump to channel

select tx power

single read of RSSI

(non-volatile)

(non-voltatile)

(volatile)

(output on P3)

#

enter

short

command mode

(The following commands are used to set up the radio operating characteristics, and should be viewed with

caution. Especially the CALPOWER command, which initiates a multiple write operation to the power

calibration table )

NDIV

RDIV

nnnnn

rrrrr

force N divider value

force R divider value

(volatile)

#

RLOAD rrrrr

OFFSET ooooo

LOAD aa nnnnn

START nnnnn

STEP

i

LIMIT

ccc

SETPOW eee

CALPOWER

(etc)

TEST

Set R divider value

Set RX offset

Set N values for first 16 channels

Set N value for ch 16

Set increment for table

Set highest permitted channel number

Set maximum power output (100mW)

(see factory procedures for more details)

Generate a 250Hz test modulation

(only fuctions in TX mode, cancelled by sending a <cr> byte)

Readback a single byte, depending on current mode:

Parallel:

P

Serial

S

Short

1

Modem

M

IDENT

(Channels 0-15 are individually programmed by the

LOAD

operation. Channels 16-127 are a consecutive

table, using the

START

value as a start point (=channel 16) and increasing the N value by

STEP

with each

increase in channel number)

Radiometrix Ltd

USX2 Data Sheet (preliminary)

page 4

ccc

aa

nnnnn

rrrrr

pp

i

ooooo

eee

= a channel number from 00 to 127

= a

two

digit channel number from 00 to 15

= synthesizer N register value, (up to 65535)

= synthesizer R register value, (up to 16383)

= power setting value (0 - 30)

= table step (increments of N) (0-7)

= receive mode frequency offset

= power calibration figure

N = channel frequency / (13MHz / R)

13MHz / R = 25KHz , so R = 520 (usually)

receive offset = 21.4MHz / (13MHz / R) , so = 856 (usually)

A pause of at least 50mS must be allowed after operations which result in eeprom programming operations

(all except NDIV, RDIV, GOTO, PSET and RSSI). This allows the programming cycle to complete.

Instructions marked ' # ' output a three byte ' OK<cr> ' sequence after sucessfully completing their eeprom

programming cycles

When first powered up, the unit will operate on channel and output level specified by the last CHAN and

POWER instructions, irrespective of previous NDIV, RDIV, CHAN or PSET operations)

3.

Short.

A limited range of radio functions are controlled by sending a single byte to PO

0 - 127

128 - 159

200

201

222

select channel

(volatile)

select power

( = byte -128) (volatile)

single read of RSSI

(output on P3)

single byte read, as for IDENT command

reception of 16 consecutive 222 bytes returns radio to

serial

mode.

This mode of operation is intended to provide a simple, fast, serial command mode.

4.

Modem.

Commands are interpreted as in SERIAL mode (and 'short' mode may be selected.) In this

mode the unit operates as a simple 1200 baud packet modem, with TXD (in) on P2 and RXD (out) on P1.

The N_TXE pin does not control tx switching in this mode, but rather the presence of valid data in the tx

buffer initiates a transmit burst. No handshaking is provided, and the unit has a sufficient over-link data rate

to transparently 'stream' continuous data. Error correction, re-transmission of corrupt packets and addressing

are not provided.

This mode is compatible with other Radiometrix 'i 1200' mode equipment, including the narrow band eval

kit.

Notes:

Unlike in the RLC and TLC units, the LOCKSERIALMODE (and FAST) commands are non-volatile. Once a

serial mode is selected, the unit will power up in this mode until a PARALLEL command is received.

The command interpreter IS case sensitive. Use upper case.

Spaces are optional (they are not decoded), provided the command line does not exceed 16 characters.

When manually programming this unit we recommend setting your terminal to local echo. The 'backspace'

key functions normally.

All serial communications use 9600baud 'inverted RS232' 8 bit data, no parity, 1 start bit, 1 or 2 stop bits

A simple 'driver' program will be made available to simplify programming of these units, if desired.

RSSI read operations only function correctly if the unit is in RX mode (n_TXE pin is high or floating)

Radiometrix Ltd

USX2 Data Sheet (preliminary)

page 5

USX2-433-5

USX2-433-5概述

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