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
COR3
27 July 2012, Issue 1
NBFM Multi-channel receiver for 868MHz SRD band
The COR3 is a 25kHz channel narrowband
multichannel Category 1 compliant receiver
intended for European 869.2-869.25MHz
Social Alarm application. It can also be used
for any 868-870MHz band Non-Specific SRD
applications. The module offers a low power,
reliable data link in an industry-standard pin
out and footprint.
Figure 1: COR3-869-5-SAL receiver
Features
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Conforms to EN 300 220-2 (Category 1) and EN 301 489-3
High performance double superhet, PLL Synthesizer with TCXO
SAW front end filter
Data rates up to 5 kbps for standard module
Fully screened
Feature-rich interface (RSSI, analogue and binary digital data outputs)
User configurable via microcontroller UART
Low power requirements
Applications
Social Alarm
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
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Social Alarm frequencies: CH0: 869.2125MHz, CH1: 869.2375MHz
Custom frequency within 865MHz - 870MHz
Up to 32 channels controlled via UART interface (16 parallel selected)
Supply range: 4.5V - 15V
Current consumption: 25mA receive
Data bit rate: 5kbps max. (standard module)
Receiver sensitivity: -120dBm (for 12 dB SINAD)
Size: 57 x 26 x 9mm
Evaluation platforms: NBEK + COR3 carrier
Radiometrix Ltd, COR3 Data Sheet
page 1
Figure 2: COR3 block diagram
Radiometrix Ltd, COR3 Data Sheet
page 2
Figure 3: COR3 Flat mounted footprint
Pin Description - COR3
Pin
1A
2A
Name
RF in
RF GND
Function
50Ω RF input from antenna
RF ground, internally connected to the module screen and pin 2 (0V)
1
2
3
4
5
RSSI
GND
Vcc
AF
RXD
6
P0/PGM
7
8
9
P1
P2
P3
DC level between 0.5V and 2.5V. 60dB dynamic range
Ground (0V)
Supply input 4.5V – 15V DC
700mV p-p audio. DC coupled, approx 1V bias
Open collector output of data slicer suitable for Bi-phase codes
Requires external pull-up resistor to required output voltage level
Parallel Channel select LSB
Serial frequency programming / configuration1
Parallel Channel select
Parallel Channel select
Parallel Channel select MSB
Notes:
1.
2.
3.
4.
There is no pull-up on the open collector RXD output.
P0-P3 are inverted parallel frequency select inputs. They have 10k pullups to 4.4V
P0 requires a 4.4V level UART (inverted RS232) serial command strings for programming
A version of the LMR2 firmware is used (so most variants of the LM_series will also be
possible for the COR3
5. Two pinout versions are offered: With conventional pins, out of the bottom of the unit (flat
mount) and with right-angle pins, to allow 'SIL' vertical mounting.
6. The actual pinout and footprint follows the NRX1/NRX2 type radio, with the addition of P0P3
Radiometrix Ltd, COR3 Data Sheet
page 3
COR3 serial configuration commands
Serial data is sent to the unit on one of the parallel channel select pins (P0). It is very important that the unit
does not 'decode' switch bounce in ordinary operation as a command string, or spurious re-writing of the
e2prom will result. For this reason the user must send the 16-character string ENABLESERIALMODE
(followed by a carriage return) to fully enable the serial command mode before sending any of the command
strings listed below. Command mode is disabled on power down, or on reception of a # character. You must
power the unit to successfully program it.
2400 baud, 8 bit data, no parity, 1 start bit, 1 or 2 stop bits, No flow control, 4.4V level UART (inverted
RS232)
Serial select of channel aa (0 to 31)
GOCHAN aa
Set value of N for channel aa (channels 0 to 31)
LOAD aa nnnnn
Channel selected by 4 bit parallel input (0 to 15)
SETPAR
Channel selected by most recent 'gochan' operation
SETSER
Enter value for R register
RVALUE rrrr
Set value of N for single channel operation. N value NOT stored in eeprom
SINGLE nnnnn
Process entry
<cr>
Clear all buffers
/
Disable command mode
#
aa = a two digit channel number from 00 to 31
nnnnn = synthesizer N register value, (up to 65535)
rrrr = synthesizer R register value, (up to 16383)
R
N
f Xtal
f channelspacing
f RF  IF
f Channelspacing

13MHz
, So R=520
25kHz

868 MHz  45 MHz
 32920
25kHz
Notes:
1. When If an N value greater than 65536 is needed then an offset of +65536 can be selected
by setting bit 15 of the R value high
2. 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.
3. /SETPAR command should be issued at the end of channel programming to put the module
back into parallel frequency select mode
4. User can modify the frequency table of 32channels to any desired frequency by changing N,
R values of synthesizer within 1.5MHz of factory set Channel 0 frequency subject to the
Radio Regulatory Band Allocation in the country of intended use.
Radiometrix Ltd, COR3 Data Sheet
page 4
Condensed specifications
Frequency
Frequency stability
Channel spacing
Number of channels
Supply
voltage
Current
Operating temperature
Size
Spurious radiations
Social ALarm (SAL) variant: CH0:869.2125MHz, CH1:869.2375MHz
User customisable frequencies: 865MHz – 870MHz
(Versions on any other UHF should, in principle, be possible depending
on SAW filter availability)
1.5kHz
25kHz
32 channels controlled via UART interface (16 parallel selected)
4.5V - 15V DC
25mA
-20οC to +55οC (Storage -30οC to +70οC)
57 x 26 x 9 mm
Compliant with ETSI EN 300 220-2 (Category 1) and EN 301 489-3
Interface
user
RF
Recommended PCB hole size
9pin 0.1" pitch molex (optionally 5 pin, without channel selects)
2pin 0.1" pitch molex
1.2mm (min.)
Intended approval
ETSI Radio standard EN 300 220-2 and EMC standard EN 301 489-3
Receive
Sensitivity
blocking
adjacent channel
Image
spurii
Spurious radiations
Outputs
Power on to valid audio
Power on to stable data out
(50:50 mark / space)
-120dBm for 12 dB SINAD
>85dB
-62dB
Tested per. ETSI 300-220 v 2.3.1
>70dB
>65dB
Compliant with ETSI 300-220-2 (Category 1) and EN 301 489-3
RSSI, carrier detect, audio, data
28ms
50ms
Radiometrix Ltd, COR3 Data Sheet
page 5
Received Signal Strength Indicator
The COR3 has wide range RSSI that measures the strength of an incoming signal over a range of 60dB or
more. This allows assessment of link quality and available margin and is useful when performing range tests.
The output on pin 1 of the module has a standing DC bias of up to 0.5V with no signal, rising to 2.5V at
maximum indication (RF input levels of -40dBm and above). Vmin-max is typically 2V and is largely
independent of standing bias variations.
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 4: RSSI voltage variation with respect to RF level at COR3
Ordering Information
Part Number
COR3-869.2125-5-H
Frequency
869.2125MHz
COR3-869-5-SAL
869.2-869.25MHz
COR3-869-5-SAL-H
869.2-869.25MHz
COR3-869-5
868-870MHz
Module mounting
Horizontal Mounting,
Perpendicular pins
Vertical Mounting,
Parallel pins
Horizontal Mounting,
Perpendicular pins
Vertical Mounting,
Parallel pins
Pins
RF, RFGND, RSSI, GND, VCC, AF, RXD
RF, RFGND, RSSI, GND, VCC, AF, RXD
P0/PGM
RF, RFGND, RSSI, GND, VCC, AF, RXD
P0/PGM
RF, RFGND, RSSI, GND, VCC, AF, RXD
P3, P2, P1, P0/PGM
COR3 can be user programmed to any frequency within 865MHz-870MHz SAW filter bandwidth.
It can be factory produced to a wide range of UHF sub-bands subject to availability of SAW filter.
COR3 can be mounted vertically on a PCB with parallel pins like in Figure 1.
Alternatively, COR3 can be supplied with perpendicular pins for horizontal mounting parallel to host PCB
ground plane.
Number of parallel channel selection pins depends on required frequency channels.
Radiometrix Ltd, COR3 Data Sheet
page 6
Radiometrix Ltd, COR3 Data Sheet
10
100
500
868.0
[mW]
600kHz
868.60
100kHz
868.70
10mW
500kHz
25mW
<0.1% or LBT
<1%
<1% or LBT
Duty Cycle
25mW
No Spacing
25kHz or
WB
No Spacing
Non-specific SRD
Channel Spacing
Applications
Alarm
RF POWER [ERP]
Non-specific SRD
<1%
<0.1%
869.20
869.25
No Spacing
25kHz
25kHz
or Wide Band
250kHz
500mW
869.65
869.70
50kHz
25mW
<10% or LBT <10%
869.30 869.40
50kHz 50kHz 100kHz
10mW 10mW 10mW
25kHz
300kHz
5mW
870.0
up to 100%
Non-specific
SRD
Alarm
Non-specific SRD
25kHz
Social Alarm
Alarm
CEPT/ERC Rec 70-03, 868 MHz Band Plan
[MHz]
Appendix
page 7
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/
Information Requests
Ofcom
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2a Southwark Bridge Road
London SE1 9HA
Tel: +44 (0)300 123 3333 or 020 7981 3040
Fax: +44 (0)20 7981 3333
[email protected]
European Communications Office (ECO)
Peblingehus
Nansensgade 19
DK 1366 Copenhagen
Tel. +45 33896300
Fax +45 33896330
[email protected]
www.ero.dk
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