Data Sheet(pdf)

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 2, 31 March 2015
TR2M
Narrow Band FM Multi-channel UHF Transceiver
UK Version: TR2M-458-5, TR2I-458-5 (100mW)
European version: TR2M-433-5, TR2I-433-5 (10mW)
The TR2M transceiver module offers a low power,
reliable data link in an industry-standard pin out and
footprint. This makes the TR2M 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 (at 10mW).
Figure 1: TR2I-433-5 transceiver
Features
433MHz version conforms to EN 300 220-3 and EN 301 489-3
458MHz version to MPT 1329 (UK specs).
Any 5MHz band module from 420MHz to 480MHz available as factory tuned custom variant
High performance double superhet, 128 channel PLL Synthesizer with TCXO
Data rates up to 5 kbps for standard module
Usable range over 1km (with 100mW variant)
Fully screened
Feature-rich interface (RSSI, automatic noise squelch, analogue and digital baseband)
Incorporates a 1200baud dumb modem
User configurable 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: 458.5-459.1MHz or 433.05-434.79MHz
Custom variants from 420MHz to 480MHz on any 5MHz band
23 channels in 458MHz band, 69 channels in 433MHz band (128 channels max.)
Transmit power: +20dBm (100mW) nominal
Supply range: 4.5V - 16V
Current consumption: 110mA transmit, 27mA receive
Data bit rate: 5kbps max. (standard module)
Receiver sensitivity: -118dBm (for 12 dB SINAD)
Size: 59 x 38 x 10mm
Evaluation platforms: NBEK + xx2M Series carrier
Radiometrix Ltd
TR2M Data Sheet
page 1
Figure 2: TR2M block diagram
Radiometrix Ltd
TR2M Data Sheet
page 2
59mm
2.7mm
3.1mm
A
1
8.9 mm
Squelch adj.
33mm
1 Vcc
2 Gnd
1 RF Gnd
2 RF in
3 RF Gnd
1 TXE (MOD TX_ON)
2 TXD (MOD NC)
3 AF in (MOD NC)
4 RSSI
5 SQF (MOD NC)
6 AF out
7 RXD (MOD NC)
8 +4.4V out
9 0V
10 PGM
11 P1 (MOD TXD)
12 P2 (MOD RXD)
13 P3 (MOD NC)
38.5mm
A:
A:
B:
B:
B:
C:
C:
C:
C:
C:
C:
C:
C:
C:
C:
C:
C:
C:
Input gain.
1
C
B
53.3mm
Unit height
10mm
Figure 3: TR2M Footprint (Top) view
Pin Description - TR2M
Pins
A1
A2
Name
Vcc
GND
Function
4.5V-16V
Ground
B1
B2
B3
RF GND
RF
RF GND
RF ground
To the antenna
RF ground
C1
TXE (MOD TX_ON)
C2
C3
TXD (MOD NC)
AF in (MOD NC)
C4
C5
C6
C7
C8
C9
C10
C11
C12
C13
RSSI
SQF (MOD NC)
AF out
RXD (MOD NC)
+4.4V out
0V
PGM
P1 (MOD TXD)
P2 (MOD RXD)
P3 (MOD NC)
Transmitter Enable. Low = ON, Open = RX mode. Internal 10kΩ pull-up to
4V
DC coupled digital data 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 deviation >2.5kHz
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 suitable for Biphase codes
Regulated DC supply. 75mA max. drain. Present if unit is powered
Ground
Serial programming/configuration input at RS232 level
Parallel frequency select inputs. Inverted logic, internal 10kΩ pullups to 4V
Notes:
1. Carrier detect on TR2M mutes the AF Out and RXD outputs. It can be factory disabled.
2. All the open collector outputs must be connected to Vcc/+4.4V out via a pull-up resistor.
3. The software incorporates a 1200baud dumb modem, compatible with that implemented in TX2M,
RX2M radios (I1200 tones and format)
4. With 1200baud modem mode enabled, parallel selection of channel is unavailable as the P1-P3 lines
are used for modem input/output operations.
5. PGM and MOD TXD (pin 10 and 11) tolerate true ±RS232 levels. No buffering is required.
Radiometrix Ltd
TR2M Data Sheet
page 3
TXE (MOD TX_ON) (C1)
AF in (MOD NC) (C3)
ADC
AF out (C6)
1kΩ
TR2M-433-5
RSSI (C4)
SQF (MOD NC) (C5)
Carrier Detect
RXD (MOD NC) (C7)
+4.4V out (C8)
GND (C9)
PGM (C10)
P1 (MOD TXD) (C11)
P2 (MOD RXD) (C12)
P3 (MOD NC) (13)
Data In
10kΩ
VDD
100nF
Parallel
Channel
Select
6
7
8
1
2
3
TXD
4
9
5
SGD
PC serial port
Data Out
Host Microcontroller
Transmit Enable
TXD (MOD NC) (C2)
Figure 4: TR2M interfaced to host microcontroller and serial port for configuration
TR2M can be directly interfaced to a host microcontroller which can generally be powered by the regulated
+4.4V output on pin 8 of TR2M. Three I/O pins on the microcontroller port can be assigned to select the first
8 channels on frequency table of the appropriate band for which the module is configured by pulling the P1P3 pins low. Channel select pins of TR2M have internal pull-up to 4V supply rail, hence channel selection
operate on inverted logic.
Channel
0
1
2
3
4
5
6
7
P3:P2:P1
111
110
101
100
011
010
001
000
433MHz band
433.050
433.075
433.100
433.125
433.150
433.175
433.200
433.225
458MHz band
458.525
458.550
458.575
458.600
458.625
458.650
458.675
458.700
Digital Received Data Output (RXD) pin is an open collector output, which should be pulled-up to required
voltage swing level (e.g. +4.4V or Vcc).
TR2M has an automatic noise squelching function which is activated when there is not any RF signal at
detectable level on the channel or if the non-coherent noise like interference level is high enough to block
any weak RF signal from being received. SQF is provided as an open-collector output for monitoring which
should be pulled-up to required voltage swing level. SQF output will jump to pull-up voltage level if received
RF signal level at the RF In/Out pin of the module is about 3dB below the level required to produce 12dB
SINAD level on demodulated AF Output signal. SQF pin can be connected to an LED to act as a Carrier
Detect indicator. Pull-up resistor value should be reduced (e.g. 1kΩ) according to the current requirement to
produce satisfactory brightness on the LED used.
TR2M can be configured using any PC/Laptop/PDA having a serial port and modem/terminal program. TXD
(pin 3) of DB9M connector can be directly wired to PGM (pin C10) of the TR2M and SGN (pin 5) of DB9M
connector should be either connected to common ground or pin C9 of the TR2M.
The whole frequency/channel table is user reconfigurable to 128 channels within 5MHz band of supplied
frequency subject to regulatory band limits. Serial Channel Selection via PGM pin gives access to the whole
of regulatory band allocation for 433.05MHz-434.790MHz (69 channels) or 458.525MHz-458.925MHz (23
channels).
Radiometrix Ltd
TR2M Data Sheet
page 4
Received Signal Strength
2.5
2.3
2.1
RSSI output (V)
1.9
1.7
1.5
1.3
1.1
0.9
0.7
0.5
-130
-120
-110
-100
-90
-80
-70
-60
-50
-40
RF Level (dBm)
Figure 5: RSSI voltage variation with respect to RF level at TR2M
If the microcontroller has a built-in Analogue to Digital Converter (ADC), the Received Signal Strength
Indicator (RSSI) output voltage level can be read by the microcontroller to estimate its distance from
transmitting TR2M unit or identify areas of weak signal reception.
RSSI can also be used to make a decision to switch to the second antenna in fixed installations within
building where the probability of null-spots are higher.
Regulatory Restrictions
There is a generic 10% duty cycle restriction on the 433MHz ISM band through out European countries with
few exceptions. Annex 1 Band E, Band E2 of European Radio Communications Committee (ERC)
Recommendation 70-03 dated February 2004 specifies the following:
433.050MHz (Ch0)
434.050MHz (Ch40)
10mW ERP, 10% duty cycle
for Channelised Narrow Band and Wide Band usage
433.775MHz (Ch69)
10mW ERP, 100% duty cycle
for <25kHz Channelised Narrow Band usage
433.05MHz
434.040MHz
434.79MHz
433.050-434.790 MHz, Non Specific Short Range Device, band is primarily intended for Telemetry,
Telecommand, Alarms, Data in general and other similar applications. Audio and Voice signals should be
avoided in the band.
Radiometrix Ltd
TR2M Data Sheet
page 5
TR2M serial configuration commands
2400 baud RS232. 8 bit data, no parity, 1 start bit, 1 or 2 stop bits, No flow control
SINGLE
nnnnn
Set value of N for single channel operation
GOCHAN xx
Serial select of channel xx (0 to 127)
LOADMX xx
Set highest permitted (serial selected) channel xx (others default to ch0)
LOAD aa nnnnn
Set value of N for channel aa (channels 0 to 15)
LOADTB nnnnn
Set value of N for channel 16 (channels 17 to 127 then in sequence)
RVALUE rrrr
Enter value for R register
SETPAR
Channel selected by 3 bit parallel input (0 to 7). Disable modem
SETSER
Channel selected by most recent 'gochan' operation
SETMOD
Enable internal modem. Frequency selected by most recent 'gochan' or 'single'
GOTEST
250Hz test tone transmission
OFFSET ooo
Set receive frequency offset (for 25KHz this is 1800)
<cr>
Process entry
/
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)
000 = frequency offset
N TX =
RX
f RF
f Channelspacing
OFFSET =
Channel
Number
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
F max
=
433.050 MHz
= 17322
25kHz
IF
f channelspacing
=
R=
fTCXO
f channelspacing
=
13MHz
, So R=520
25kHz
45 MHz
= 1800
25kHz
433MHz band
N value for TX
458MHz band
N value for TX
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
434.775
/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
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
/LOADTB 18357
/LOADMX 23
25kHz
433.05
434.79
433MHz Band
458MHz
Band
459.1
461.675
Figure 6: Maximum regulatory and user accessible sequential channels
Radiometrix Ltd
TR2M Data Sheet
page 6
Go to Ch69 (434.775MHz) highest channel on 433MHz band
Go to Channel 70 will wrap back to Channel 0 (433.05MHz)
Increase maximum allowed Channel to 89 (435.275MHz)
Serially select Channel 6 (433.200MHz)
Enable Parallel Channel Selection using P1:P2:P3
Go to Channel 88 (435.250MHz) outside legal 433MHz band
Go to new highest Channel 89 (435.275MHz)
Set legal highest Channel as 69 (434.775MHz) below 434.790MHz
Go to Channel Selected by P1:P2:P3
Set Synthesiser N value to 17332 to operate on 433.300MHz
Return to Parallel Frequency Selection
Change Channel 3 N value to 17338 to operate on 433.450MHz)
Serially select newly set Channel 3 frequency of 433.450MHz
Set the Ch3 back to factory set N value 17325 (433.125MHz)
Modulate with 250Hz test tone to visualise peak FM deviation
Return to Parallel Frequency Selection will not work
Module should be power-reset to exit GOTEST command
Go to last Serially Selected Channel 3 (433.125MHz)
Change Synth. R value to 1300 to get multiple of 10kHz spacing
which allows Ch0 N value to be changed to 43403 (434.030MHz)
Go to newly set Ch0 (434.030MHz) if none of P1-P3 are pulled low
Change Ch1 N to 43410 (434.100MHz) with non-uniform spacing
Select newly set Ch1 (434.100MHz) if only P1 is pulled low
Serially select newly set Channel 1 (434.100MHz)
Change R value to factory set 25kHz channel spacing
Change Channel 0 N value to factory set 17322 (433.050MHz)
Change Channel 0 N value to factory set 17323 (433.075MHz)
Go to factory set Channel 0 frequency of 433.050MHz
Go to factory set Ch0 or Ch1
Change frequency to descending order with Ch0=434.775MHz
with Ch1=434.750MHz to use at 100% duty cycle
Serially select newly set Ch1 frequency of 434.750MHz
Enable 1200 baud Modem. (Disables Parallel Channel Selection)
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.
4. User can modify the frequency table of 128 channels to any desired frequency by changing N, R
values of synthesizer within ±2.5MHz of factory set Channel 0 frequency subject to the Radio
Regulatory Band Allocation in the country of intended use.
5. All other frequency, power, analogue input gain and automatic noise squelching adjustment will be
treated as custom variants of the module to be set by factory.
Radiometrix Ltd
TR2M Data Sheet
page 7
Pin description of TR2M with Modem mode selected
The 'modem' mentioned is a 1200 baud RS232 semi-intelligent unit (Transmit keyed when valid serial data is
present, so no separate TX control needed. Coding in the datastream also permits the receiver to ignore
noise and only output valid serial data). This is a half duplex unit, so collisions between transmitted and
received packets must be dealt with by the user.
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
Name
MOD TX_ON
MOD NC
MOD NC
RSSI
MOD NC
AF out
NC
+4.4V out
0V
PGM
MOD TXD
MOD RXD
MOD NC
Function
Open = normal modem operation. Low = constant TX (for test). 10k pullup to 4V
Leave open
Leave open
DC level between 0.5V and 2.5V. 60dB dynamic range
Leave open
Modem tones or noise present
Leave open
Regulated DC supply. 75mA max. drain. Present if unit is powered
Ground
Serial programming/configuration input at RS232 level
RS232 data input (true). 10k pullup to 4V
Inverted RS232 data out (to inverting buffer like MAX232)
Leave open
TR2Ms on both ends 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.
TXE (MOD TX_ON) (C1)
TXD (MOD NC) (C2)
AF in (MOD NC) (C3)
TR2M-433-5
RSSI (C4)
SQF (MOD NC) (C5)
AF out (C6)
Serial COM Port
RXD (MOD NC) (C7)
+4.4V out (C8)
GND (C9)
PGM (C10)
P1 (MOD TXD) (C11)
P2 (MOD RXD) (C12)
SW1
VDD
6
1
2
7
3
8
RXD
TXD
4
9
P3 (MOD NC) (13)
5
SGD
RS232 driver
Figure 7: TR2M 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
TXD (Pin 3) of a Serial Port can be switched from PGM (Pin C10) to MOD TXD (Pin C11) with no RS232
driver in between. However, MOD RXD (Pin C12) 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 C8).
Radiometrix Ltd
TR2M Data Sheet
page 8
Condensed specifications
Frequency
Frequency stability
Channel spacing
Number of channels
458.5-459.1MHz or 433-434MHz (any 3MHz band from 420-475MHz)
+/- 1.5kHz
25kHz (12.5kHz by special order)
128 channels controlled via RS232 interface (8 parallel selected)
Supply
4.5-16V
110mA nominal transmit
27mA receive
voltage
Current
ο
ο
Operating temperature
Size
Spurious radiations
Interface
user
Power
RF
Recommended PCB hole size
13pin 0.1" pitch molex
2pin 0.1" pitch molex
3pin 0.1" pitch molex
1.2mm (min.)
Intended approval
ETSI Radio standard EN 300 220-3 and EMC standard EN 301 489-3
Transmitter
Output power
TX on switching time
Modulation type
TX modulation bandwidth
Adjacent channel TX power
TX spurii
Inputs
+20dBm (100mW) ±1dB (factory adjustable 1-100mW)
50 ms
FM, FSK (F1D, F3D)
DC – 3kHz
<-37dBm (<200nW)
better than -40dBm
analogue, data (CMOS/TTL compatible)
Receiver
Sensitivity
adjacent channel
-910kHz
½ IF
image / spurious
blocking
Outputs
Power on to valid audio
Power on to valid audio
Power on to stable data out
(50:50 mark / space)
-10 to +60 C (Storage -30 to +70 C)
59 x 38 x 10 mm
Compliant with ETSI EN 300 220-3 and EN 301 489-3
-118dBm for 12 dB SINAD (-115dBm for 12 dB SINAD for 12k5 variant)
65dB
69dB
>80dB
>80dB
86dB or better
RSSI, carrier detect, audio, data
28ms (no noise mute)
45ms (with noise mute)
50ms (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
Radiometrix Ltd
TR2M Data Sheet
page 9
Transceiver Variants
The transceiver is available in two variants – TR2I and TR2M
The standard TR2M, in Transmit Mode, 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 Analogue and Digital Data output on the receiver. This variant can
be used for applications where data inversion will be problematic.
No
modulation
Vcc
AF
3V
Data slicer
0V
RXD
TR2M
(TX mode)
433.053MHz
433.05MHz
433.047MHz
TR2M
(RX mode)
Figure 8: Data polarity change from TR2M (in transmit mode) to TR2M (in receive mode)
The TR2I is designed to be pin and polarity compatible with existing industry standard modules. Analogue
and Digital Data Output are inverted relative to original transmitted signal in Receive Mode.
TR2I, in Transmit Mode, 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 Analogue and Digital Data output on the TR2I in Receive Mode. TR2I
can be used as an exact plug-in replacement for existing industry standard modules.
No
modulation
Vcc
AF
TR2I
0V
Data slicer
3V
(TX mode)
RXD
433.053MHz
433.05MHz
433.047MHz
TR2I
(RX mode)
Figure 9: Data polarity change from TR2I (in transmit mode) to TR2I (in receive mode)
Ordering information
Part No.
Description
Frequency band
Data rate (max)
TR2M-433-5
TR2I-433-5
TX2M transceiver (non inverted RXD output)
TX2I transceiver (inverted RXD output)
433.05MHz - 434.790MHz
433.05MHz - 434.790MHz
5kbps
5kbps
TR2M-458-5
TR2I-458-5
TX2M transceiver (non inverted RXD output)
TX2I transceiver (inverted RXD output)
458.525MHz - 459.100MHz
5kbps
5kbps
TR2M-458-10
TR2I-458-10
TX2M transceiver (non inverted RXD output)
TX2I transceiver (inverted RXD output)
458.525MHz - 459.100MHz
458.525MHz - 459.100MHz
10kbps
10kbps
Radiometrix Ltd
TR2M 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
[email protected]
www.radiometrix.com
Copyright notice
This product data sheet is the original work and copyrighted property of Radiometrix Ltd. Reproduction in
whole or 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
Riverside House
2a Southwark Bridge Road
London SE1 9HA
Tel: +44 (0)845 456 3000 or 020 7981 3040
Fax: +44 (0)20 7783 4033
[email protected]
European Radiocommunications Office (ERO)
Peblingehus
Nansensgade 19
DK 1366 Copenhagen
Tel. +45 33896300
Fax +45 33896330
[email protected]
www.ero.dk
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