CIRCUIT DESIGN CDP-RX-07MP User manual

OPERATION GUIDE.
OG_CDP-RX-07M_v20e Circuit Design, Inc.
1
UHF Narrow band radio data module
CDP-RX-07M 434MHz
CDP-RX-07MP 434MHz
Operation Guide
Version 2.0 (Mar. 2020)
CIRCUIT DESIGN, INC.,
7557-1 Hotaka, Azumino
Nagano 399-8303 JAPAN
Tel: + [phone]
Fax: + [phone]
e-mail: inf[email protected]
http://www.circuitdesign.jp

OPERATION GUIDE.
OG_CDP-RX-07M_v20e Circuit Design, Inc.
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CONTENTS
GENERAL DESCRIPTION & FEATURES ................................................................................ 3
SPECIFICATIONS .................................................................................................................... 4
PIN DESCRIPTION .................................................................................................................. 5
OPERATING INSTRUCTIONS ................................................................................................. 7
BLOCK DIAGRAM .................................................................................................................... 8
DIMENSIONS ........................................................................................................................... 9
TEST DATA ............................................................................................................................ 11

OPERATION GUIDE.
OG_CDP-RX-07M_v20e Circuit Design, Inc.
3
GENERAL DESCRIPTION & FEATURES
General description
The CDP-RX-07M and CDP-RX-07MP are low power narrow band FSK receiver modules.
Double super heterodyne receiver with high reception sensitivity provides stable long distance communication.
Using a TCXO as the reference oscillator circuit of the radio component ensures high frequency stability and
a wide operating temperature range from –20°C to +65°C.
The CDP-RX-07M is compatible with the CDP-RX-05M-R in shape and function, and provides equivalent
performance.
The RF channel is selectable from four preset frequency channels and set by the solder jumpers on the
bottom side of the module and with the CDP-RX-07MP, it can also be set through the connector pins.
Furthermore, with the CDP-RX-07MP, the user can reprogram each channel with a frequency selected from
67 frequencies in the 434MHz band using a dedicated setting program. For details of the dedicated setting
program and how to reprogram the frequency channels, refer to the application note “How to reprogram the
preset frequencies of the CDP-TX-07MP/CDP-RX-07MP”.
Features
 Low power narrow band FSK - 25 kHz channel spacing
 4 preset RF channels
 Low voltage operation
 Wide operating temperature range (-20°C to +65 °C) / TCXO built in
 High receiver sensitivity for long range applications - 600 m or more at line of sight
 High reliability for industrial applications -
robust metal housing, high selectivity and shock resistance
 Compact size
 RSSI (Received Signal Strength) output
 RoHS / RED compliant
 EN 300 220 Receiver category 1
Applications
 Industrial remote control
 Security / Alarms
 Telemetry / Monitoring systems
 Tracking systems

OPERATION GUIDE.
OG_CDP-RX-07M_v20e Circuit Design, Inc.
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SPECIFICATIONS All ratings at 25°C +/- 5°C unless otherwise noted
Item Specification
Applicable standard EN 300 220 (Receiver category 1)
Communication form One way
Oscillation system Crystal based PLL oscillation
Number of channels 4
Frequencies [MHz] CH 3* 434.0750 *
CH 2 433.9200
CH 1 434.6000
CH 0 434.7000
* Factory default frequency channel setting.
Frequency setting can be done with the jumpers and also the channel select pins are available with the CDP-RX-
07MP. For
details, refer to PIN DESCRIPTION.
Frequency stability < +/- 2.5 ppm (-10 to + 60 °C, reference frequency = 25 °C)
Aging rate < +/- 1 ppm / Year
Initial frequency tolerance at delivery < +/- 1.5 ppm (within 1 year after the final adjustment)
Pulse width 208 us - 20 ms
Data rate （FSK) 100 - 4,800 bps
Operating temp. range -20 °C to + 65 °C
Demodulation FM Narrow
Sensitivity (12dB/SINAD at CCITT filter) -120 dBm
Sensitivity (BER <0.1 %) -115 dBm
Selectivity +/-5 kHz at -6 dB point
Adjacent CH selectivity 45 dB
Spurious radiations < -60 dBm
Distortion (AF output) < 5 % at 1 kHz
S/N ratio (AF output) 45 dB
AF Output level (Fm=1KHz) -10.5 dBm (Fmod=+/- 3 KHz)
Data output Digital output, pulled up to Vcc (22 k ohm)
Other outputs RSSI, AF
Supply Voltage 3.0 to 14 V DC
Supply current (Typ. at 3.0V) 23 mA (Typ.)
I/O terminals Ant, Gnd, Vcc, Dataout, AFout, RSSIout, Power Control
Channel select (CDP-RX-07MP)
Dimensions 36 X 26 X 8 mm
Weight 13 g
CDP-RX-07MP reprogrammable frequency channels
Each of the 4 preset channels are reprogrammable using values chosen from a frequency table containing 67
values that consists of 433.920 MHz and values from 433.075 MHz to 434.700 MHz with 25 kHz spacing.
To reprogram the preset channels, a dedicated setting program is provided.
For details, refer to the application note “How to reprogram the preset frequencies of the CDP-TX-07MP/CDP-
RX-07MP”.

OPERATION GUIDE.
OG_CDP-RX-07M_v20e Circuit Design, Inc.
5
PIN DESCRIPTION
Common to CDP-RX-07M and CDP-RX-07MP
Pin-No.
Pin-
Name
I/O Description Equivalent internal circuit
CN1-1 DATA O
The data signal output
The terminal is pulled up with a resistor.
The output signal level is 0 to Vcc.
CN1-2 AF O
The AF signal output terminal
The signal output level is -10.5dBm typ.
(Fm=1 kHz /Fmod=+/-3 kHz, 100 k ohm)
CN1-3 RSSI O
The receiving level output
The level indicates the strength of RF level.
Note that the output voltage may be reduced
depending on the load impedance to be
connected.
CN1-4 CTRL I
The power on/off control terminal (Low active).
A voltage of VCC-1.8 V or lower voltage makes
the circuit active and VCC-0.6 V or higher
disables the circuit.
Please control this terminal with an open-
collector or open-drain output.
Note that leakage current will flow if there is a
potential difference between VCC and the
CTRL.
Do not apply a voltage of VCC+0.3 V or higher
to the CTRL pin.
CN1-5 VCC - The power supply terminal.
Operates on 3.0 to 14 V.
CN1-6 GND - The ground.
Connect to the ground of the control board.
CN2-1 ANT The antenna terminal Connect an antenna with
50 ohm impedance.
CN2-2 GND - The ground terminal for the antenna.
JP1
I
Solder jumpers for frequency channel setting.
This terminal is pulled-up to the internal power
supply.
Ch3 (JP1-Open JP2-Open)
Ch2 (JP1-Short JP2-Open)
Ch1 (JP1-Open JP2-Short)
Ch0 (JP1-Short JP2-Short)
JP2

OPERATION GUIDE.
OG_CDP-RX-07M_v20e Circuit Design, Inc.
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CDP-RX-07MP
Pin-No Pin-
Name
I/O
Description Equivalent internal circuit
CN3-1 S1 I
Channel selection terminals.
The S1 and S2 are internally connected to JP1
and JP2, respectively.
Set the terminal to Open or Gnd-Short to select
the channel.
Ch3 (S1-Open S2-Open)
Ch2 (S1-Short S2-Open)
Ch1 (S1-Open S2-Short)
Ch0 (S1-Short S2-Short)
Do not apply a voltage exceeding the internal
voltage 2.7V+0.3V.
Also, do not apply a voltage when the circuit
power is off.
Via S1 and S2, the user can reprogram the 4
frequency channels to preset by using a
dedicated setting program. For details of how to
reprogram the preset channels, refer to the
application note.
CN3-2 S2 I
CN3-3 MODE I
Normally leave this terminal open.
Setting this terminal to Low enables the user to
reprogram the 4 preset channels by using a
dedicated setting program. For details of how
to reprogram the preset channels, refer to the
application note.
CDP-RX-07M CDP-RX-07MP

OPERATION GUIDE.
OG_CDP-RX-07M_v20e Circuit Design, Inc.
7
OPERATING INSTRUCTIONS
Supply voltage
The CDP-RX-07M contains a voltage regulator to guarantee stable performance in the given range of supply
voltage. It is designed to operate on batteries and operates with low voltage and low current consumption. The
supply voltage must be within the specified voltage range. The module shows an unstable operation with the
lower voltage specified.
If there is a lot of power supply noise, or if there is a noise source nearby, receiver performance such as
sensitivity may be degraded.
Data format
The maximum data rate is 4800 bps. The maximum pulse width for continuous High and Low signal is 20 ms
(96 bits) at 4800 bps. The minimum pulse width is 208 us.
Long intervals of HIGH or LOW bits should be avoided. Succeeding bits can be distorted in their pulse width. If
the sequence of HIGH or LOW bits is too long then there is a possibility that the logic level of the data output
will change.
It is good to have a 20bit preamble (1010…) in front of the data to ensure communication reliability.
Inputs/Outputs
The CDP-RX-07M has 3 output terminals (AF, DATA and RSSI) and one input terminal (CTRL).
The AF output is the analog output from the FM detector circuit.
The DATA output is a digital output. This is the signal after AF signals pass through a band pass filter and
comparator. The output signal level is 0 to Vcc and can be easily connected to other digital circuits.
The RSSI output is an indicator of the received signal strength. The stronger the received signal is, the higher
voltage is output. There is individual variability in the output level of the RSSI signal. Also it should be noted that
the output voltage may be reduced depending on the load impedance to be connected.
The CDP-RX-07M does not have a built-in mute circuit. The AF and DATA outputs will show noise on the
outputs when no signal is received. Valid data signals can be detected by utilizing the RSSI output to configure
a mute circuit.
The CTRL input can be used to control the internal voltage regulator and turn on/off the power supply to the
internal circuit. Normally, use this terminal as Open or Gnd-short.
Antennas
Connect an antenna of 50 Ω impedance according to the frequency to be used. Note that the performance of
the antenna changes significantly depending on the connection condition, shape, and surrounding environment,
and it affects the reception sensitivity and distance.

OPERATION GUIDE.
OG_CDP-RX-07M_v20e Circuit Design, Inc.
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BLOCK DIAGRAM
Monolithic
Surface Acoustic Crystal Filter FM IF-IC:
ANT Wave Filter (21.7MHz±7.5KHz) (2nd-Mix/IF-Amp/Quad detector)
(RF-In)
Filter
(LC) Lo-In Mix-Out Mix-In
2nd-Local Active Filter Data Slicer
21.25MHz (2.4KHz) & Buffer
1st-Local Ceramic Filter
F0-21.7MHz (450KHz)
Buffer VCO
3～14V In Out Filter
(LC)
In Out Loop Filter
Lo active (LC)
21.25MHz
Internal J1 J2
(TCXO) Jumper
（Ch select)
S1/S2/MODE： CDP-RX-07MP only.
S2
S1
SPI
LD MODE
GND
Regulator
GND
CTRL
Internal Clock
Vcc
1st-Mixer
PLL Synthesizer
IF-In
DO OSC-Out
Voltage
Amp MCFSAW
Voltage
2.7V (Other)
2.7V (VCO & Buffer)
Regulator
RSSI
AF
DATA
RSSI AF-Out
OSC-In
FIN Typ. 8MHz)
1Chip CPU
(Flas h memory/
FET-
SW

OPERATION GUIDE.
OG_CDP-RX-07M_v20e Circuit Design, Inc.
9
DIMENSIONS
CDP-RX-07M

OPERATION GUIDE.
OG_CDP-RX-07M_v20e Circuit Design, Inc.
10
CDP-RX-07MP