ETC WP-MK-X2010-868

High Integrity FM Transceiver
RS-MK-X2010
Features
•
•
•
•
•
•
•
•
•
•
•
Operation on 434.075, 868.40 and 914.5 MHz
X2011 version includes integrated pcb loop
antenna (434 & 868 MHz versions)
Double RF filtering = High Reliability RF Link
Data rates to 20 kbps (Wide-band 64 kbps
version available to order)
-112 dBm receiver sensitivity (434 version)
CD and RSSI outputs
Crystal stabilised accurate RF
Hence narrower BW filter utilised
Results in over 300m range
EN 300 220-1, 300 683 & FCC compliant
Immune to Tetra and High power Radio Amateur
Repeater Stations
Applications
•
EPOS TERMINALS
•
REMOTE TELEMETRY & TELECOMMAND
•
•
REMOTE METER READING
DOMESTIC AND COMERCIAL SECURITY
General Description
The WP-MK-X2010 radio transceiver module was
designed to provide reliable wireless operation at
moderate data rates for use throughout the world. Its
unique features of narrower RF channel bandwidths
and hence high interference rejection capability at
SAW module prices make the X2010 the ideal choice
for next generation applications.
Available for operation at the major frequency
allocations world-wide in the same package, these
modules have been designed to provide a reliable
wire free link for the next century, accounting for the
increased traffic from other legal users of the radio
spectrum.
The transmitter section uses a PLL design that
utilises a highly stable and accurate reference
crystal oscillator. This results in a RF transmission
tightly controlled in its frequency spread and over
its operating temperature range. This is exploited in
the receiver design.
The receiver section uses a single conversion
super-het design, again using PLL technology.
Hence narrower bandwidth RF filters are utilised
which result in superior rejection of interference as
well as providing good receiver sensitivity and
hence range.
Page 1 of 7
High Integrity FM Transceiver
RS-MK-X2010
Absolute Maximum Ratings: Receiver
-20° C to +55° C
-40° C to +100° C
6V
Vcc + 0,3v
0 dBm
Operating temperature:
Storage temperature:
Supply Voltage
Data Input:
RF Input
Electrical Characteristics:
Performance data measured at 20° C and +5 volt supply and RF = 434,075 MHz
DC LEVELS
Supply voltage
Supply current (receiver enabled)
Supply current (transmitter enabled)
Leakege current with Vcc connected
Data input/output high
Data input/output low
RF
Receiver sensitivity (12 dB SINAD on AF
output)
Image rejection
RF power out (transmitter)
FM Deviation
Initial frequency accuracy
Overall frequency accuracy
Max RF input to receiver
pin
min.
typ.
max.
units
17
17
17
4,5
5
7
8
5,5
12,14
12,14
0,7xVcc
0
V
mA
mA
uA
V
V
13
E.M.C.
Spurious responses upto 1GHz
LO leakage, conducted
LO leakage, radiated
DYNAMIC TIMING
RX enable to valid RSSI / CD
RX enable to stable receiver data out
TX enable to full RF out
Minimum data pulse width
Data Bit rate
50
1
Vcc
0,0xVcc
-112
dBm
50
1
+/-10
± 100
+/-2
0
dB
mW
KHz
Hz
KHz
dBm
<-36
<60
<60
dB
dBm
dBm
5
5
50
mS
mS
mS
uS
bps
20000
notes
2
Notes
1)
2)
Over full operating temperature range
1 Hz = 2 bps
Page 2 of 7
High Integrity FM Transceiver
RS-MK-X2010
Mechanical description
8.5
2.0
0.8
5.0
1.3
30.4
22.0
1
2
3
4
5
6
7
8
9
Pin 1
18
17
16
15
14
13
12
11
10
33.0
Notes
•
•
•
•
Recommended PCB hole diameter to accommodate the connecting pins = 1.2mm
All dimensions are in mm
Distance between each connecting pin = 2.54mm
Pins 4,5,6 and 7 are internally floating not connected to anything
Page 3 of 7
High Integrity FM Transceiver
RS-MK-X2010
Mechanical description
Loop Antenna
3
48
1
18
17
16
15
14
13
12
11
10
23
7
8
9
33
Notes
•
•
•
All dimensions are in mm
Recommended PCB hole diameter to accommodate the connecting pins = 1.2mm
Distance between each connecting pin = 2.54mm
Page 4 of 7
High Integrity FM Transceiver
RS-MK-X2010
Pin Functional description WP-MK-X2010 & WP-MK-X2011
Pin No.
Description
1&3
RF Ground
2
Antenna
9, 10, 18
4, 5, 6 & 7
7 (WP-MK-X2011)
Ground
NC
Gnd
8
RSSI
11
CD
12
RxD
13
AF
14
TxD
15
Tx Enable
16
Rx Enable
17
Vcc
Details
For best results, these pins should be connected to the ground plane
against which the antenna radiates
Nominal 50 ohm input/output impedance capacitively isolated from
internal circuit. See application notes for antenna examples
Supply ground points
Not connected internally
RF gnd only on X2011
Receiver signal strength indicator
DC voltage proportional to RF signal strength being received
Digital Carrier Detect Output – Active Low
Receiver digital data output (CMOS logic out) representing true data as
supplied to the transmitter
Audio Frequency Output
Data input to the transmitter can be directly interfaced to CMOS logic
drive operating on the same supply voltage as the transceiver
Active Low
Applying Vcc disables the transmitter
Active Low
Applying Vcc places the receiver in sleep mode
Supply voltage range from 4.5 to 5.5volts. Note that module is not
reverse polarity protected
State Table
Tx (Pin 15)
Rx (Pin 16)
1
1
0
0
1
0
1
0
Mode
Power down mode. Supply current < 1uA
Receiver only enabled. Data, AF, CD and RSSI outputs valid
Transmitter only enabled. Tx data input valid
Tx and Rx on. Avoid this mode as it will eventually destroy the module
Page 5 of 7
High Integrity FM Transceiver
RS-MK-X2010
Application Information
RSSI Values
Antenna Design
The RSSI output provides a dc voltage that is
proportional to the RF signal strength picked up on the
antenna (pin 2) port of the module.
The design and positioning of the antenna is as
crucial as the module performance itself in achieving
a good wireless system range. The following will
assist the designer in maximising system
performance.
The antenna should be kept as far away from
sources of electrical interference as physically
possible. If necessary, additional power line
decoupling capacitors should be placed close to the
module.
The antenna ‘hot end’ should be kept clear of any
objects, especially any metal as this can severely
restrict the efficiency of the antenna to receive power.
Any earth planes restricting the radiation path to the
antenna will also have the same effect.
The table below gives typical values of RSSI for varying
degrees of RF signal strength applied.
RF Input (dBm)
-105
-100
-90
-80
-70
-60
-50
-40
-30
-20
RSSI (V)
0,82
0,88
1,12
1,43
1,75
2,06
2,36
2,57
2,6
2,6
Best range is achieved with either a straight piece of
wire, rod or PCB track @ ¼ wavelength (15.5cm @
433.92MHz). Further range may be achieved if the ¼
wave antenna is placed perpendicular in the middle
of a solid earth plane measuring at least 16cm radius.
In this case, the antenna should be connected to the
module via some 50 ohm characteristic impedance
coax.
Helical Antenna
RF
34mm @ 433MHz
17 turns equally spaced
= 5mm (inside)
∅
Whip Antenna
RF
15.5cm @ 433MHz
Figure 2: Antenna Configurations To Be Used
With The WP-MK-X2010
Page 6 of 7
High Integrity FM Transceiver
RS-MK-X2010
Ordering Information
Standard Product;
Part No
WP-MK-X2010-434
WP-MK-X2010-868
WP-MK-X2010-914
WP-MK-X2011-434
WP-MK-X2011-868
Description
434,075 MHz Transceiver
868,40 MHz Transceiver
914,5 MHz Transceiver
Integrated Antenna 434,075 MHz Transceiver
Integrated Antenna 868,40 MHz Transceiver
Note: 868 and 914 versions available November 2001.
Round Solutions Ltd.
Niederlassung Deutschland
Zaunweg 4
D-63303 Dreieich
Tel. 06103 960510
Fax. 06103 960509
www.roundsolutions.com
[email protected]
Page 7 of 7