TX2I-433-5 [RADIOMETRIX]
UHF Narrow Band FM multi channel radio modules; UHF窄带FM多通道无线模块
| 型号： | TX2I-433-5 |
| 厂家： | 
RADIOMETRIX LTD |
| 描述： | UHF Narrow Band FM multi channel radio modules |
| 文件： | 总11页 (文件大小：380K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Radiometrix
Hartcran House, 231 Kenton Lane, Harrow, HA3 8RP, England
Tel: +44 (0) 20 8909 9595, Fax: +44 (0) 20 8909 2233
Issue 3, 15 October 2007
TX2M/RX2M
UHF Narrow Band FM multi channel radio modules
UK Version: TX2M-458-5/RX2M-458-5 (100mW)
European version: TX2M-433-5/RX2M-433-5 (10mW)
The TX2M transmitter and RX2M receiver
modules offer a low power, reliable data link
in an industry-standard pin out and
footprint. This makes the TX2M/RX2M pair
ideally
suited
to
those
low
power
applications
where
existing
wideband
modules have insufficient range, or where
multi-channel operation is needed. Two
versions are available, covering the 458.5-
459.1MHz UK band (at 100mW) and the
European 433.05-434.79MHz band.
Features
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433MHz version conforms to EN 300 220-3 and EN 301 489-3
and 458MHz version to MPT 1329 (UK specs)
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Any custom band between 420MHz and 480MHz with 5MHz (AR0) frequency range
High performance double superhet, 128 channel PLL synthesizer with TCXO
Data rates up to 5 kbps for standard module
Usable range over 1km
Fully screened. Low profile
Feature-rich interface (RSSI, automatic noise squelch, analogue and digital baseband)
Incorporate a 1200baud dumb modem
Re-programmable via RS232 interface
Low power requirements
Applications
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Handheld terminals
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
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Size: 59 x 38 x 7mm
Operating frequency: 458.5-459.1MHz or 433.05-434.79MHz
23 channels in 458MHz band (128 channels max.)
Transmit power: +20dBm (100mW) nominal
Supply range: 4.5V - 16V
Current consumption: 100mA transmit, 13mA receive
Data bit rate: 5kbps max. (standard module)
Receiver sensitivity: -118dBm (for 12 dB SINAD)
Radiometrix Ltd
TX2M/RX2M Data Sheet
page 1
Radiometrix Ltd
TX2M/RX2M Data Sheet
page 2
Radiometrix Ltd
TX2M/RX2M Data Sheet
page 3
Pin Description - TX2M
Pin: A
1
2
Name
+Vin
Gnd
Function
+4.5-16V
Ground
Pin: B
Name
Function
1
2
3
Gnd
RF out
Gnd
RF ground
To the antenna
RF ground
Figure 3: TX2M Footprint (Top) view
Pin: C
Name
0V
TXE
TXD
AF in
Function
Ground
1
2
3
4
Transmitter enable. Low = ON, open = off. 4k7 internal pullup to Vcc
DC coupled input for 3-12V CMOS logic. Leave open if unused
AC coupled Analogue Input. Limit to 1Vpk-pk ±10% to keep distortion
<1.5% and peak FM deviation >2.5kHz
5
6
7
+4.4Vout
PGM
0V
DC supply. 75mA maximum drain. Only present when TXE is low
Serial programming/configuration input at RS232 level
Ground
8
9
10
P1 (MOD TXD)
P2 (MOD NC)
P3 (MOD TXH)
Parallel frequency select inputs. Inverted logic, 10k pullups to 4V
Pin Description - RX2M
Pin A
1
2
Name
+Vin
Gnd
Function
+4.5-16V
Ground
Pin B
Name
Function
1
2
3
Gnd
RF out
Gnd
RF ground
To the antenna
RF ground
Figure 4: RX2M Footprint (Top) view
Pin C
Name
Function
1
2
3
4
5
6
RSSI
SQF
AF out
RXD
+4.4V out
0V
DC level between 0.5V and 2.5V. 60dB dynamic range
Noise operated carrier detect. Open collector. ON/low = no signal
200mVpk-pk audio. DC coupled, approx 1V bias. Muted by squelch
Open collector output of data slicer. Need external pull-up
DC supply. 75mA maximum drain. Present if unit is powered.
Ground
7
PGM
Serial programming/configuration input at RS232 level
8
9
10
P1 (MOD NC)
P2 (MOD RXD)
P3 (MOD CDE)
Parallel frequency select inputs. Inverted logic, 10k pullups to 4V
NOTES:
1. Internal AF Input gain is factory set for 1Vpk-pk to produce 3kHz peak deviation and minimum
distortion. Analogue gain may be set for an input level of 50mV – 2V pk-pk. This cannot be done
without appropriate test equipment. Contact factory for details
2. Carrier detect on RX2M mutes the AF and DATA outputs when RF input signal is <-123dBm.
This can be factory disabled if required.
3. There are no pullups on the open collector outputs. External pull-up resistor should be used.
4. With 1200baud modem mode enabled, parallel selection of channel is unavailable as the P1-P3 lines
are used for input/output operations.
Radiometrix Ltd
TX2M/RX2M Data Sheet
page 4
TX2M and RX2M serial interface commands
2400 baud at RS232 level. 8 bit data, no parity, 1 start bit, 1 or 2 stop bits, No flow control.
Transmit (pin 3 on DB9) and Signal Ground (pin 5 on DB9) should be connected to PGM and 0V pin.
Command
Format
Description
SINGLE nnnnn
GOCHAN xx
LOADMX xx
LOADaa nnnnn
LOADTB nnnnn
RVALUE rrrr
SETPAR
SETSER
SETMOD
GOTEST
Set value of N for single channel operation
Serial select of channel xx (0 to 127)
Set highest permitted (serial selected) channel xx (others default to ch0)
Set value of N for channel aa (channels 0 to 15)
Set value of N for channel 16 (channels 17 to 127 then in sequence)
Enter value for R register
Channel selected by 3 bit parallel input (0 to 7). Disable modem
Channel selected by most recent GOCHAN operation
Enable internal modem. Frequency selected by most recent GOCHAN or SINGLE
250Hz test tone modulated transmission
<CR>
Process entry (Carriage Return = 0D hex )
/
Clear all buffers
xx = channel number from 00 to 127
aa = two digit channel number from 00 to 15
nnnnn = synthesizer N register value, (up to 65535)
rrrr = synthesizer R register value, (up to 16383)
fRF
433.050MHz
25kHz
fTCXO
13MHz
NTX
=
=
= 17322
R =
=
, So R=520
fChannelspacing
fchannelspacing 25kHz
fRF − 21.4MHz 433.050MHz − 21.4
NRX
=
=
=16466
fChannelspacing
25kHz
Channel 433MHz N value for TX
Number band
N value for RX
458MHz N value for TX
band
N value for RX
0
1
2
3
4
5
6
7
8
433.050
433.075
433.100
433.125
433.150
433.175
433.200
433.225
433.250
433.275
433.300
433.325
433.350
433.375
433.400
433.425
433.450
/LOAD00 17322
/LOAD01 17323
/LOAD02 17324
/LOAD03 17325
/LOAD04 17326
/LOAD05 17327
/LOAD06 17328
/LOAD07 17329
/LOAD08 17330
/LOAD09 17331
/LOAD10 17332
/LOAD11 17333
/LOAD12 17334
/LOAD13 17335
/LOAD14 17336
/LOAD15 17337
/LOADTB 17338
/LOADMX 69
/LOAD00 16466
/LOAD01 16467
/LOAD02 16468
/LOAD03 16469
/LOAD04 16470
/LOAD05 16471
/LOAD06 16472
/LOAD07 16473
/LOAD08 16474
/LOAD09 16475
/LOAD10 16476
/LOAD11 16477
/LOAD12 16478
/LOAD13 16479
/LOAD14 16480
/LOAD15 16481
/LOADTB 16482
/LOADMX 69
458.525
458.550
458.575
458.600
458.625
458.650
458.675
458.700
458.725
458.750
458.775
458.800
458.825
458.850
458.875
458.900
458.925
459.100
/LOAD00 18341
/LOAD01 18342
/LOAD02 18343
/LOAD03 18344
/LOAD04 18345
/LOAD05 18346
/LOAD06 18347
/LOAD07 18348
/LOAD08 18349
/LOAD09 18350
/LOAD10 18351
/LOAD11 18352
/LOAD12 18353
/LOAD13 18354
/LOAD14 18355
/LOAD15 18356
/LOAD00 17485
/LOAD01 17486
/LOAD02 17487
/LOAD03 17488
/LOAD04 17489
/LOAD05 17490
/LOAD06 17491
/LOAD07 17492
/LOAD08 17493
/LOAD09 17494
/LOAD10 17495
/LOAD11 17496
/LOAD12 17497
/LOAD13 17498
/LOAD14 17499
/LOAD15 17500
9
10
11
12
13
14
15
16
/LOADTB 18357 /LOADTB 17501
/LOADMX 23 /LOADMX 23
F max 434.775
Please observe the following ERC/REC 70-03 (April 2004) Annex 1 recommendation when using the
Non-specific Short Range Device (SRD) band for Telemetry, Telecommand, Alarms, Data in general and
other similar applications.
ERP
Frequency Band
Duty
Cycle
Channel
spacing
Notes
E (433.050 - 434.790MHz)
E1 (433.050 - 434.790MHz)
E2 (434.040 - 434.790MHz)
10mW
<10% No spacing Audio and voice signals should be
avoided in the band 433.050MHz -
1mW <100% No spacing
10mW <100%
434.790MHz
<25kHz
Power density limited to -13dBm/10
kHz for wideband channels with a
bandwidth greater than 250 kHz
Radiometrix Ltd
TX2M/RX2M Data Sheet
page 5
Set parallel frequency select mode
Go to Channel 3 (458.600MHz)
Go to Channel 13 (458.850MHz)
Go to Channel 23 (459.100MHz maximum allowed Channel)
Go to Channel 22 (459.075MHz)
TX2M will wrap around to Ch0 if >Ch23 (459.100MHz)
Increase highest channel to Ch30 (out of 458MHz band)
Go to new maximum Channel 30 (459.275MHz)
Reset the maximum Channel to regulatory band limit
Ch16 onwards changed from 458.925MHz to 459.000MHz
Go to new Ch18 frequency of 459.050MHz (not 458.975MHz)
Go to new maximum Ch23 frequency of 459.175MHz
Reset Ch16 onwards from 458.925MHz (within regulatory band)
Clear buffer and return to parallel channel selection
Clear buffer and go to last serially selected Ch23 (458.925MHz)
Return serially selected Channel to 0 (458.525MHz)
Return to channel selected by parallel pins (P1-P3) levels
Jump to 459.500MHz without storing it on EEPROM
Enable internal 1200baud modem
Enable internal 250Hz square wave modulated test transmission
Figure 5: Serial configuration of TX2I-458-5 transmitter using HyperTerminal
25kHz
433.05
434.79
433MHz Ba nd
458MHz
Ba nd
459.1
461.675
Figure 6: Maximum allowed and programmable channels
Notes:
1. A pause of at least 50ms must be allowed between command strings (EEPROM programming
time) SINGLE mode does not store the N value in EEPROM. Therefore the unit is inoperative
after a power down until either another valid SINGLE command is received, or mode is changed
by a GOCHAN, SETPAR or SETSER command. SINGLE mode is intended for frequency agile
applications.
2. /SETPAR command should be issued at the end of channel programming to put the module
back into parallel frequency select mode
3. In 458MHz band, channel 12 (458.825MHz) and channel 15 (458.900MHz) are allocated
specifically for fixed alarm and radio keys/vehicle paging applications respectively and should
not be used for general purpose applications.
Radiometrix Ltd
TX2M/RX2M Data Sheet
page 6
Pin description of TX2M/RX2M with Modem mode selected
The 'modem' mentioned is a 1200 baud RS232 semi-intelligent unit (Transmitter is enabled when valid
serial data is present, so no separate Transmit Enable control is needed. Coding in the data stream also
permits the receiver to ignore noise and only output valid serial data.
Pin Description - TX2M
Pin
1
Name
0V
Function
Ground
2
3
TXE
N/C
Must be tied to 0V
4
N/C
5
6
7
+4.4Vout
PGM
0V
DC supply. 75mA maximum drain. Only present when TXE is low
Serial programming/configuration input at RS232 level
Ground
8
9
MOD TXD (P1) Serial data input at RS232 level
MOD N/C (P2)
10
MOD TXH (P3) Active Low Transmit Hold for continuous transmission (useful for test)
Pin Description - RX2M
Pin
Name
Function
1
RSSI
DC level between 0.5V and 2.5V. 60dB dynamic range
(only valid during databursts)
2
N/C
3
N/C
(modem tones or noise present)
4
N/C
(modem tones or noise present)
5
6
+4.4V out
0V
DC supply. 75mA maximum drain. Present if unit is powered
Ground
7
PGM
Serial programming/configuration input at RS232 level
8
MOD N/C (P1)
9
MOD RXD (P2) Modem Received Data at TTL level (requires RS232 driver)
10
MOD CDE (P3) Pull low to enable Carrier Detect on modem operation (not recommended)
Both the TX2M and the RX2M should be configured to required operating frequency using GOCHAN
command before starting to use the internal 1200 baud modem, because the P1-P3 pins will be used as
Modem Data pins and the modem will operate on the last serially selected channel after SETMOD
command is used to enable the Modem.
Antenna
Antenna
0V (C1)
NC (C2)
TXE (C2)
TX2M
PC serial port
PC serial port
+4.4V out (C5)
GND (C6)
4.4V 0ut (C5)
PGM (C6)
1
2
2400bps
1200bps
1
6
2
6
SW1
RX2M
GND(C7)
RXD
PGM (C7)
2400bps
7
8
9
3
7
8
9
3
TXD
100kΩ
TXD
SGD
MOD TXD
MOD RXD (C9)
uC
UART
1200bps
4
100k
Ω
(C8)
4
5
VDD
µC
MAX232
SGD
5
NPN
UART
4.5 - 15V
4.5 - 15V
Figure 5: TX2M and RX2M interfaced to PC serial port in modem mode
Note: Baud rate used for Modem is half that of used for serial configuration. Attached RS232 devices
should be set with the following: 1200bps, 8 Data bits, No Parity, 1/2 stop bits, no flow control
For TX2M, TXD (Pin 3) of a Serial Port can be switched from PGM (Pin C6) to MOD TXD (Pin C8) with
no RS232 driver in between. However, in RX2M, MOD RXD (Pin C9) requires an RS232 line driver
before it can be connected to RXD (pin 2) of a serial port. Some of the RS232 line drivers can be powered
from the regulated +4.4V out (Pin C5).
.
Radiometrix Ltd
TX2M/RX2M Data Sheet
page 7
Condensed specifications
Frequency
Frequency stability
458.5-459.1MHz or 433-434MHz (any 5MHz band from 420-480MHz)
+/- 1.5kHz
Channel spacing
25kHz (12.5kHz by special order)
Number of channels
128 channels controlled via RS232 interface (8 parallel selected)
Supply
voltage
4.5-16V
Current
100mA nominal transmit
13mA receive
Operating temperature
Size
-10 to +60 C (Storage -30 to +70 C)
59 x 38 x 7 mm
Spurious radiations
Compliant with ETSI EN 300 220-3 and EN 301 489-3
Interface
user
8pin 0.1" pitch molex
2pin 0.1" pitch molex
3pin 0.1" pitch molex
Power
RF
Recommended PCB hole size 1.2mm (min.)
Intended approval
ETSI Radio standard EN 300 220-3 and EMC standard EN 301 489-3
Transmitter
Output power
+20dBm(100mW) ± 1dB (factory adjustable 1 - 100mW)
TX on switching time
Modulation type
TX modulation bandwidth
Adjacent channel TX power
Inputs
50 ms
FM, FSK (F1D, F3D)
DC – 3kHz
-37dBm
analogue, data (CMOS/TTL compatible)
Receiver
Sensitivity
-112dBm for 1 part per 1000 BER
-118dBm for 12 dB SINAD
-70dB
image / spurious
Blocking
-85dB
adjacent channel
Outputs
Power on to valid audio
Power on to valid audio
Power on to stable data out
<-60dB (Tested per. ETSI EN 301 489-3
RSSI, carrier detect, audio, data
28ms (no noise mute)
45ms (with noise mute)
50ms for 50:50 mark / space (with or without mute)
Notes: 1. The data slicer cannot be depended upon for data waveform frequencies below 250Hz
2. When RX is on and a transmitter keys up, again a 50ms period is required to stabilise data
output mark/space. i.e. allow at least 50ms of preamble
Typical current consumption of TX2M at various RF output power level is as follows:
RF output Current
(mW)
100
50
(mA)
90
67
25
54
10
41
5
35
1
30
Note: These measurements taken at 433MHz (for 458MHz current consumption increases by about 5%).
RF power output can only be factory set.
Radiometrix Ltd
TX2M/RX2M Data Sheet
page 8
Operating principle of internal modem
This device is a simplex link handling a 1200 baud asynchronous datastream (1 start, 8data, 1stop).
Buffering in the transmit end handles TX startup timing requirements, while the presence of sync
codes in the transmitted bursts prevents the receiver from outputting garbage in the presence of noise.
No error correction or retransmission of lost packets is supported. To operate with proper +/-12V RS232
levels an external buffer (such as a MAX232) will be needed
Physically the modem code resides in the PIC microcontroller which controls the radio functions. The
modem uses the internal hardware serial port of the processor.
Operation: Serial interface
Both transmit and receive modems implement a 32 byte software FIFO. At the transmit end this is
used to allow for the TX2M transmitter start up time (about 32mS), while on receive it buffers arriving
packets to the constant output data rate. All timing and data formatting tasks are handled by the
software. The user need not worry about keying the transmitter before sending data: the link is entirely
transparent.
For transmission across the link data is formatted into packets, each comprising 3 bytes of data and a
sync code. If less than 3 bytes are in the transmit end FIFO then a packet is still sent, but idle state
replaces the unused bytes. When the transmit end FIFO is completely emptied, then the transmitter is
keyed off .
Operation: Radio interface
Raw data is not fed to the radios. A coding operation in the transmit software, and decoding in the
receiver, isolate the AC coupled, potentially noisy baseband radio environment from the datastream.
The radio link is fed a continuous tone by the modem. As in biphase codes, information is coded by
varying the duration consecutive half-cycles of this tone. In our case half cycles of 500µs (a long, or L)
and 250µs (a short, or S) are used.
In idle (or 'preamble') state, a sequence of Ls is sent (resembling a 1kHz tone).
A packet comprises the Synchronising (or address) part : LSSSSSSSSSSSSL followed by the Data part,
made up of twelve Groups (of four half cycles duration). Each Group encodes 2 data bits, so one byte is
encoded by 4 Groups.
Although there are 16 possible states for a four half cycle group (from SSSS to LLLL), only four of the
possible states are used for valid data:
All other possible group combinations (except LLLL) are void, and result in the entire packet being
rejected by the receiver software as a noise artifact. Idle state tone (LLLL ....) is decoded as null data,
but does not void the packet, as a packet containing less than 3 bytes still needs to be decoded.
The advantage of using the above coding technique:
1.Ease of decoding:
Unlike biphase, where a bit is coded as either a long half cycle or a
short cycle, here all half cycles are detected separately.
2. Inherent error detection:
Although only 14 sync/address 'bits' (halfcycles) are used, the
following 48 'bits' (halfcycles) only code 24 real data bits, leading to
enhanced noise/error discrimination (the equivalent of 5 more sync
bits).
3. Comparable spectral efficiency: For a maximum transmitted baseband frequency of 2kHz, a 3 byte
packet is sent in 22ms. An equivalent biphase coded packet
(comprising 19 sync + 24 data + 3 null flags) at 2kbits/sec takes
23ms
Radiometrix Ltd
TX2M/RX2M Data Sheet
page 9
Transmitter variant
RX2M is designed to be pin and polarity compatible with existing industry standard modules. AF and
Data Output are inverted relative to original transmitted signal.
The transmitter is available in two variants – TX2I and TX2M
The non-inverting transmitter called TX2M frequency modulates the carrier frequency in the normal
sense whereby higher modulating voltage increases the carrier frequency and lower modulating voltage
decreases the carrier frequency which results in an inverted AF and Data output on the receiver. This
will be the standard module and exact plug-in replacement for existing industry standard modules.
No
modulation
Vcc
AF
Data slicer
RXD
0V
3V
TX2M
RX2M
Figure 7: Data polarity change from TX2M (non-inverting) transmitter to RX2M receiver
The inverting transmitter called TX2I reverses the Frequency Modulating order whereby the higher
modulating voltage decreases the carrier frequency and lower modulating voltage increases carrier
frequency which results in non-inverting AF and Data output on the receiver. This variant can be used
for applications where data inversion will be problematic.
No
modulation
Vcc
AF
Data slicer
RXD
3V 0V
TX2I
RX2M
Figure 8: Data polarity change from TX2I (inverting) transmitter to RX2M receiver
Ordering information
Part Number Description
Frequency band
Maximum data rate
TX2M-433-5
TX2I-433-5
RX2M-433-5
TX2M (non-inverting) transmitter
TX2I (inverting) transmitter
RX2M receiver
433.05MHz-434.790MHz
433.05MHz-434.790MHz
433.05MHz-434.790MHz
5kbps
5kbps
5kbps
TX2M-458-5
TX2I-458-5
RX2M-458-5
TX2M (non-inverting) transmitter
TX2I (inverting) transmitter
RX2M receiver
458.525MHz-459.100MHz
458.525MHz-459.100MHz
458.525MHz-459.100MHz
5kbps
5kbps
5kbps
TX2M-458-10 TX2M (non-inverting) transmitter
TX2I-458-10 TX2I (inverting) transmitter
RX2M-458-10 RX2M receiver
458.525MHz-459.100MHz
458.525MHz-459.100MHz
458.525MHz-459.100MHz
10kbps
10kbps
10kbps
Radiometrix Ltd
TX2M/RX2M Data Sheet
page 10
Radiometrix Ltd
Hartcran House
231 Kenton Lane
Harrow, Middlesex
HA3 8RP
ENGLAND
Tel: +44 (0) 20 8909 9595
Fax: +44 (0) 20 8909 2233
sales@radiometrix.com
www.radiometrix.com
Copyright notice
This product data sheet is the original work and copyrighted property of Radiometrix Ltd. Reproduction in wholeor
in part must give clear acknowledgement to the copyright owner.
Limitation of liability
The information furnished by Radiometrix Ltd is believed to be accurate and reliable. Radiometrix Ltd reserves the
right to make changes or improvements in the design, specification or manufacture of its subassembly products
without notice. Radiometrix Ltd does not assume any liability arising from the application or use of any product or
circuit described herein, nor for any infringements of patents or other rights of third parties which may result from
the use of its products. This data sheet neither states nor implies warranty of any kind, including fitness for any
particular application. These radio devices may be subject to radio interference and may not function as intended if
interference is present. We do NOT recommend their use for life critical applications.
The Intrastat commodity code for all our modules is: 8542 6000.
R&TTE Directive
After 7 April 2001 the manufacturer can only place finished product on the market under the provisions of the
R&TTE Directive. Equipment within the scope of the R&TTE Directive may demonstrate compliance to the
essential requirements specified in Article 3 of the Directive, as appropriate to the particular equipment.
Further details are available on The Office of Communications (Ofcom) web site:
http://www.ofcom.org.uk/radiocomms/ifi/
Information Requests
Ofcom
European Radiocommunications Office (ERO)
Peblingehus
Riverside House
Nansensgade 19
2a Southwark Bridge Road
London SE1 9HA
Tel: +44 (0)845 456 3000 or 020 7981 3040
Fax: +44 (0)20 7783 4033
information.requests@ofcom.org.uk
DK 1366 Copenhagen
Tel. +45 33896300
Fax +45 33896330
ero@ero.dk
www.ero.dk
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