Data Sheet(pdf)

Radiometrix
Hartcran House, 231 Kenton Lane, Harrow, HA3 8RP, England
Tel: +44 (0) 20 8909 9595, Fax: +44 (0) 20 8909 2233
Issue 2, 01 November 2004
TX2 & RX2
UHF FM Data Transmitter and Receiver Modules
The TX2 and RX2 data link modules
are a miniature PCB mounting UHF
radio transmitter and receiver pair
which enable the simple implementation of a data link at upto 160
kbit/s at distances upto 75 metres inbuilding and 300 metres open
ground.
Features:
left: TX2 transmitter
right:RX2 receiver
CE certified by independent Notified Body
Verified to comply with harmonised radio standard EN 300 220-3 by accredited Test Laboratory
Verified to comply with harmonised EMC standard EN 301 489-3 by accredited Test Laboratory
Data rates up to 160 kbps
Usable range up to 300 m
433.92 MHz versions.
Fully screened
Available for operation at 433.92 MHz in Europe (including UK), both modules combine full screening
with extensive internal filtering to ensure EMC compliance by minimising spurious radiations and
susceptibilities. The TX2 and RX2 modules will suit one-to-one and multi-node wireless links in
applications including car and building security, EPOS and inventory tracking, remote industrial
process monitoring and computer networking. Because of their small size and low power requirements,
both modules are ideal for use in portable, battery-powered applications such as hand-held terminals.
Transmitter - TX2
2 stage SAW controlled, FM modulated at up to 160 kbps
Operation from 2.2V to 6V
+9dBm on 433.92MHz
High efficiency, >15%, DC RF
Improved frequency and deviation accuracy
2nd harmonic, < -60dBc
Receiver - RX2
Double conversion FM superhet
SAW front end filter, image rejection 50dB
Supply 3.0V to 6.0V @ 13mA
-96 dBm sensitivity @1ppm BER with 160kbps version
-100 dBm sensitivity @ 1ppm BER with 40kbps-version
-107 dBm sensitivity @ 1ppm BER with 14kbps-version
LO leakage, < -60 dBm
Radiometrix Ltd., TX2 & RX2 Data Sheet
page 1
Functional description:
The TX2 transmitter module is a two stage, SAW controlled FM transmitter operating between 2V and
6V and is available in 433.92MHz. The TX2 module is type approved to EN 300 220-3 for European use
and delivers nominally +9dBm from a 5V supply at 12mA. The module measures 32 x 12 x 3.8 mm.
The RX2 module is a double conversion FM superhet receiver capable of handling date rates of up to
160kbps. The SIL style RX2 receiver measures 48 x 17.5 x 4.5 mm. It will operate from a supply of 3-6V
and draws 14mA when receiving. A fast-acting carrier detect and a power-up enable time of less than
1ms. This allows effective duty cycle power saving and a -107 dBm sensitivity. This combined with a
SAW front-end filter results in an excellent RF performance and EMC conformance.
TX2 transmitter:
Vcc (3)
RF out (2) 433 MHz band
pass filter
100 kHz
nd
2 order LPF
buffer
+10 dBm @ 5V
433.92MHz
SAW-stabilised
oscillator
RF gnd (1)
TXD (5)
100K
0 VOLT (4)
Fig. 1: TX2 block diagram
Pin description:
RF GND
(pin 1)
RF ground pin, internally connected to the
module screen and pin 4 (0V). This pin should
be connected to the RF return path (e.g. coax
braid, main PCB ground plane etc.)
RF out
(pin 2)
50Ω RF output to the antenna, it is DC
isolated internally. (see antenna section for
suggested antenna/feeds).
Fig.2: physical dimensions
Vcc
(pin 3)
+ve supply pin. The module will generate RF when the Vcc supply is present. Maximum ripple content
0.1VP-P. A 100nF de-coupling ceramic capacitor is suggested.
0V
(pin 4)
Supply ground connection, connected to pin 1 and screen.
TXD
(pin 5)
This DC coupled modulation input will accept either serial digital data ( 0V to Vcc levels) or high level
linear signals. Input impedance is 100kΩ.
Radiometrix Ltd., TX2 & RX2 Data Sheet
page 2
RX2 receiver:
418 MHz SAWcontrolled
1st Local oscillator
RF in (1)
433 MHz band
pass filter
pre amplifier
Vcc (5)
nd
2 local
oscillator
15.82 MHz
2µF
CD (3)
nd
SAW band
pass filter
2 mixer
IF amlpifier
AF
91 kHz
demodulator
st
1 mixer
AF (6)
buffer
adaptive data slicer
+
Data out (7)
-
RF gnd (2)
0 VOLT (4)
Fig. 3: RX2 block diagram
Pin description
RF in
(pin 1)
50Ω RF input from the antenna, it is
DC isolate internally. (see antenna
section for suggested antenna/feeds).
RF GND
(pin 2)
RF ground pin, internally connected to
the module screen and pin 4 (0V). This
pin should be connected to the RF
return path (e.g. coax braid, main
PCB ground plane etc.)
Fig. 4: physical dimensions
CD
(pin 3)
The Carrier Detect may be used to drive an external PNP transistor to obtain a logic level carrier detect
signal, see test circuit. If not required it should be connected to pin 5 (Vcc).
0 Volt
(pin 4)
Supply ground connection, connected to pin 1 and screen.
Vcc
(pin 5)
+ve supply pin. +3.0V to +6.0V @ <17mA . The supply must be clean < 2mVP-P ripple. A 10µF decoupling capacitor and 10Ω series resistor is recommended if a clean supply is not available.
AF
(pin 6)
This is a buffered and filtered analogue output from the FM demodulator. It has a standing DC bias of
1.2V and 400mV P-P base band signal. It is useful as a test point or to drive linear decoders. Load
impedance should be > 2kΩ and < 100pF.
RXD
(pin 7)
This digital output from the internal data slicer is a squared version of the signal on pin 6 (AF). It may
be used to drive external decoders. The data is true data, i.e. as fed to the transmitter. Load impedance
should be > 1kΩ and < 1nF
Radiometrix Ltd., TX2 & RX2 Data Sheet
page 3
Survival Maximums:
Operating temperature:
Storage temperature:
-10°C to +55°C
-40°C to +100°C
TX2, all variants
Vcc (pin 3)
Data input (pin 5)
RF out (pin 2)
-0.1V to +10.0V
-0.1V to +10.0V
±50V @ < 10MHz , +20dBm @ > 10MHz
RX2, all variants
Vcc (pin 5)
Data, CD & AF (pin 7,3,6)
RF input (pin 1)
-0.1V to +10.0V
-0.1V to + Vcc V
±50V @ < 10MHz , +13dBm @ > 10MHz
note:
Operation of the TX2 above 6V may cause the module to exceed the licensed power level.
E lectrical Performance: TX2 transmitter
pin
min.
typ.
max.
units
notes
3
3
2.2
4.0
3.0
5.0
4.0
6.0
V
V
-3V version
-5V version
TX2-433-3V
supply current @ Vcc = 3V
RF power
@ Vcc = 3V
3
2
4
0
6
+4
10
+6
mA
dBm
1
TX2-433-5V
supply current @ Vcc = 5V
RF power
@ Vcc = 5V
3
2
7
+6
10
+9
14
+12
mA
dBm
1
RF
2nd harmonic
harmonics @ > 1GHz
initial frequency accuracy
overall frequency accuracy
2
2
-
-30
-70
-65
-50
0
-
-54
-40
+30
+70
dBc
dBc
kHz
kHz
-
20
DC
DC
-
25
5
-
30
20
100
10
100
kHz
kHz
kHz
%
µs
DC LE VE LS
supply voltage
supply voltage
CURRE NT & RF POWE R
FM deviation (+/-)
modulation bandwidth @ -3dB
modulation bandwidth @ -3dB
modulation distortion (THD)
power up time to full RF
note:
-
1
1
2
1. Measured into a 50Ω load.
2. For 160kbps version
Radiometrix Ltd., TX2 & RX2 Data Sheet
page 4
E lectrical Performance: RX2 Receiver
Unless otherwise noted:
Figures apply to 5V versions unless noted otherwise
Vcc = 5.0V, temperature 20°C unless noted otherwise
pin
min.
typ.
Max.
units
notes
DC LE VE LS
supply voltage, Vcc standard
supply voltage, Vcc, 3V version
supply current
supply ripple
data output high, 100µA source
data output low, 100µA sink
load capacitance on AF / Data
5
5
5
5
7
7
6,7
4.0
3.3
11
-
5.0
3.5
13
Vcc-0.6
0.4
-
6.0
4.0
17
2
100
V
V
mA
mVP-P
V
V
pF
1
RF
RF sensitivity for 10dB (S+N)/N
RF sensitivity for 10dB (S+N)/N
RF sensitivity for 10dB (S+N)/N
RF sensitivity for 1ppm BER
RF sensitivity for 1ppm BER
RF sensitivity for 1ppm BER
CD threshold
CD threshold
CD threshold
IF band width
initial frequency accuracy
1,6
1,6
1,6
1,6
1,6
1,6
1,3
1,3
1,3
1
-107
-100
-100
-93
-97
-90
-30
-113
-107
-96
-107
-100
-90
-107
-100
-104
250
0
+30
dBm
dBm
dBm
dBm
dBm
dBm
dBm
dBm
dBm
kHz
kHz
E .M.C.
image rejection (2*FIF)
spurious responses upto 1GHz
LO leakage, conducted
LO leakage, radiated
1
1
1
-
-
-50
-70
-65
-70
-
dB
dB
dBm
dBm
AF BASE BAND
baseband bandwidth @ -3dB
baseband bandwidth @ -3dB
baseband bandwidth @ -3dB
AF level
DC offset on AF
distortion on recovered AF
ultimate (S+N)/N
ultimate (S+N)/N
6
6
6
6
6
6
6
6
0.006
0.060
0.250
0.8
35
-
450
1.2
0.5
45
28
7
20
91
1.6
1
-
kHz
kHz
kHz
mVP-P
V
%
dB
dB
-
-
1
20
5
3
0.6
0.7
-
ms
ms
ms
ms
ms
ms
14kbps version
40kbps version
160kbps version
14kbps version
40kbps version
160kbps version
14kbps version
40kbps version
160kbps version
2
2
14kbps version
40kbps version
160kbps version
160kbps version
DYNAMIC TIMING
Power up with signal present
power up to valid CD, TPU-CD
power up to stable data, TPU-DAT
power up to stable data, TPU-DAT
power up to stable data, TPU-DAT
power up to stable AF, TPU-AF
power up to valid CD, TPU-CD
Radiometrix Ltd., TX2 & RX2 Data Sheet
14kbps version
40kbps version
160kbps version
160kbps version
160kbps version
page 5
pin
min.
Signal applied with supply on
signal to valid CD, TSIG-CD
signal to stable data, TSIG-DAT
signal to stable data, TSIG-DAT
signal to stable data, TSIG-DAT
signal to stable AF, TSIG-AF
signal to valid CD, TSIG-CD
-
-
time between data transitions
time between data transitions
time between data transitions
mark:space ratio
7
7
7
-
0.07
0.025
0.00625
20
notes:
1.
2.
3.
4.
typ.
Max.
units
notes
0.5
15
3
0.75
0.1
0.2
-
ms
ms
ms
ms
ms
ms
14kbps version
40kbps version
160kbps version
160kbps version
160kbps version
50
15
1.5
0.5
80
ms
ms
ms
%
4, 14kbps version
4, 40kbps version
4, 160kbps version
3
For 6dB (S+N)/N degradation on wanted -100dBm signal
Receiver spurious responses are at FRF ± (n×15.92MHz), n=1,2,3 etc.
Average over 30ms (14kbps), 3ms (40kbps), 1ms (160kbs) at maximum bit rate.
Values for 50:50 mark to space (i.e. square wave)
Module test circuits
Fig.5: TX2 test circuit
Fig.6: RX2 test circuit
∗ The PNP transistor (e.g. BC558B) enables a CMOS compatible Carrier Detect signal to be derived from pin 3. If no
CD signal required pin 3 should be connected directly to pin 5 (Vcc).
Radiometrix Ltd., TX2 & RX2 Data Sheet
page 6
Module mounting considerations
The modules may be mounted horizontally or vertically on an area of ground plane preferably close to
the antenna to minimise feed length. The receiver and it’s antenna should be kept away from sources of
interference (micro’s, SMPS etc.). The modules may be potted if required in a viscous compound which
can not enter the screen can..
Warning: Do NOT wash the modules. They are not hermetically sealed.
Fig. 7: module mounting options
Antenna requirements
Three types of integral antenna are recommended and approved for use with the module:
0.5 mm enameled copper wire
close wound on 3.2 mm diameter former
RF
433 MHz = 24 turns
A. Helical antenna
Feed point 15% to 25% of total loop length
RF-GND
track width = 1mm
2
C2
C3
C4
4 to 10 cm inside area
C1
RF
B. Loop antenna
16.4cm
C. Whip antenna
wire, rod, PCB-track or a combination
of these three
RF
433 MHz = 16.4 cm total from RF pin.
Fig.8: Antenna
Ultimate performance
Easy of design set-up
Size
Immunity proximity effects
Range open ground to similar antenna
A
helical
**
**
***
**
200m
B
loop
*
*
**
***
100m
C
whip
***
***
*
*
300m
(for TX2-433-14-5V & RX2-433-14-5V)
Antenna selection chart
Radiometrix Ltd., TX2 & RX2 Data Sheet
page 7
A) Helical
Wire coil, connected directly to pin 2, open circuit at other end. This antenna is very
efficient given it's small size (20mm x 4mm dia.). The helical is a high Q antenna, trim
the wire length or expand the coil for optimum results. The helical de-tunes badly with
proximity to other conductive objects.
B) Loop
A loop of PCB track tuned by a fixed or variable capacitor to ground at the 'hot' end and
fed from pin 2 at a point 20% from the ground end. Loops have high immunity to
proximity de-tuning.
C) Whip
This is a wire, rod, PCB track or combination connected directly to pin 2 of the module.
Optimum total length is 15.5cm (1/4 wave @ 433MHz). Keep the open circuit (hot) end
well away from metal components to prevent serious de-tuning. Whips are ground plane
sensitive and will benefit from internal 1/4 wave earthed radial(s) if the product is small
and plastic cased
The antenna choice and position directly controls the system range. Keep it clear of other metal in the
system, particularly the 'hot' end. The best position by far, is sticking out the top of the product. This is
often not desirable for practical/ergonomic reasons thus a compromise may need to be reached. If an
internal antenna must be used try to keep it away from other metal components, particularly large
ones like transformers, batteries and PCB tracks/earth plane. The space around the antenna is as
important as the antenna itself
Duty Cycle requirements
The duty cycle is defined as the ratio, expressed as a percentage, of the maximum transmitter “on” time
on one or more carrier frequencies, relative to a one hour period. Where an acknowledgement message
is required, the additional transmitter “on” time shall be included.
There is a 10% duty cycle restriction on 433.050-434.790 MHz band in most of the EU member states.
The TX2-433 is a RF module intended to be incorporated into a wide variety of applications and finished
products, Radiometrix has no control over the end use of the TX2-433.The harmonised band 433.050 to
434.790 MHz as detailed in Annex 1 Band E of CEPT/ERC Recommendation 70-03 (which can be
downloaded at http://www.ero.dk/scripts/docmanag98/dm.dll/QueryDoc?Cat=Recommendation)
has list of countries where Duty Cycle restriction apply.
Module users should, therefore, ensure that they comply with the stated Duty Cycle requirements of
the version of CEPT/ERC Recommendation 70-03 in place at the time of incorporation of the TX2-433
into their product. It should be noted that the stated Duty Cycle must not be exceeded otherwise any
approval granted for the TX2-433 will be invalidated.
Radiometrix Ltd., TX2 & RX2 Data Sheet
page 8
Variants and Ordering information
The TX2 transmitter and RX2 receiver are manufactured in several variants
Supply voltage 5V
3V
( 4V to 6V TX2 & RX2)
( 3.3V to 4V for RX2, 2.2V to 4V for TX2)
RX data rate: Slower version,
Faster version,
Very fast version
TX data rate
7kHz baseband BW, data rate up to 14kbps
20kHz baseband BW, data rate up to 40kbps
91kHz baseband BW, data rate up to 160kbps
Faster version,
20kHz baseband BW, data rate up to 40kbps
Very fast version, 100kHz baseband BW, data rate up to 160kbps
The following are standard:
TX2-433-40-5V:
TX2-433-160-5V:
433.92 MHz , 5V TX , 10mW
433.92 MHz , 5V TX , 10mW
RX2-433-14-5V:
RX2-433-40-5V:
RX2-433-160-5V
433.92 MHz , 5V RX , 14kbps
433.92 MHz , 5V RX , 40kbps
433.92 MHz , 5V RX , 160kbps
3V versions of the above are available and should be ordered with a -3V suffix on the part number.
(e.g. RX2-433-14-3V is set-up for 3.3V to 4V operation)
Radiometrix Ltd., TX2 & RX2 Data Sheet
page 9
Radiometrix Ltd., TX2 & RX2 Data Sheet
page 10
Radiometrix Ltd., TX2 & RX2 Data Sheet
page 11
Radiometrix Ltd., TX2 & RX2 Data Sheet
page 12
CE Certificate of TX2 and its variants
Radiometrix Ltd., TX2 & RX2 Data Sheet
page 13
CE Certificate of RX2 and its variants
Radiometrix Ltd., TX2 & RX2 Data Sheet
page 14
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/licensing/licensing_policy_manual/
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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