CIRCUIT DESIGN CDP-TX-02F-R User manual

OG_CDP-02F-R_v30e
OPERATION GUIDE
UHF Narrow band radio data module
CDP-TX/RX-02F-R 434 MHz
Operation Guide
Version 3.0 (June 2017)
CIRCUIT DESIGN, INC.,
7557-1 Hotaka, Azumino
Nagano 399-8303 JAPAN
Tel: + [phone]
Fax: + [phone]
e-mail: [e-mail]
http://www.circuitdesign.jp

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CONTENTS
GENERAL DESCRIPTION & FEATURES ....................................................... 3
SPECIFICATIONS ............................................................................................ 4
PIN DESCRIPTION........................................................................................... 6
CHANNEL AND FREQUENCY SETTING......................................................... 8
POWER SETTING .......................................................................................... 11
ANTENNAS..................................................................................................... 12
BLOCK DIAGRAM ......................................................................................... 13
DIMENSIONS ................................................................................................ 15
TEST DATA ..................................................................................................... 17
REGULATORY COMPLIANCE INFORMATION ............................................ 18
CAUTION & WARNINGS ............................................................................... 20
REVISION HISTORY ...................................................................................... 21
APPLICATION NOTE ..................................................................................... 22

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GENERAL DESCRIPTION & FEATURES
Features
RED (EN 300 220) / RoHS compliant
1 mW / 10 mW selectable
Frequency selection free in 128 channels for 433 MHz
High sensitivity receiver
FM narrow band modulation
Applications
Radio remote control cranes and machines
Factory automation M2M
Security systems
Alarms
Telemetry systems
Models
Model name TX/RX Ch setting
CDP-TX-02F-R 434MHz Transmitter Dip switches
CDP-RX-02F-R 434MHz Receiver Dip switches
CDP-TX-02FP-R 434MHz Transmitter Pin connectors
CDP-RX-02FP-R 434MHz Receiver Pin connectors
For the CDP-TX/RX-02F-R, frequency setting is performed with the 7-bit switches. Instead of
these 7-bit switches, the CDP-TX/RX-02FP-R has 14-pin connectors for frequency setting,
making it possible to set the channels externally.
There are no other technical and mechanical differences between CDP-02F-R and CDP-02FP-
R.
General description
The CDP-TX-02F-R and CDP-RX-02F-R are an RoHS compliant, embedded industrial narrowband
FM radio transmitter and receiver.
They are suitable for various application fields such as wireless data communication, remote control,
telemetry or wireless security systems. They are easy to use and integrate into application systems.
Both CDP-TX-02F-R and CDP-RX-02F-R are equipped with a frequency synthesizer system with
micro controller. Available frequency ranges are from 433.1875 MHz to 434.7750 MHz (128 channels).
The compact size, low operating voltage and frequency selectability of the CDP-02F-R make it ideal
for various applications where its interference rejection and practical distance range is far better than
similar RF modules based on wide band SAW-resonator frequency generators.
The CDP-RX-02F-R receiver has excellent blocking and adjacent channel selectivity.

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SPECIFICATIONS
CDP-TX-02F(P)-R Transmitter
All ratings at 25°C +/- 5°C unless otherwise noted
Parameter Rating Conditions
General characteristics
Applicable standard EN 300 220 –2
Communication method One way
Emission class F1D
Operating frequency range 433.1875 – 434.7750 MHz
Operating temperature range -20 to + 60°C No dew condensation
Storage temperature range -30 to + 70°C No dew condensation
Aging rate Max. +/- 1 ppm / year TX freq. / RX Local freq.
Initial frequency tolerance Max. +/- 2 ppm At delivery *
1
Dimension 26 x 36 x 10 mm Excluding protrusion
Weight 14 g Not including the antenna
Electrical specification
Oscillation system PLL controlled VCO
Channel spacing 25 kHz
Number of RF channels 128 ch (12.5 kHz step) Default channel at delivery (434.775 MHz)
Data rate 300 to 4800 bps (Pulse length Min. 208 us Max. 20 ms)
DI input level L = Gnd H = 3V to Vcc
Data polarity Positive TX DI vs RX DO
PLL reference frequency 21.25 kHz TCXO
Antenna impedance 50 ohm Nominal
Operating voltage 3 – 12 V
Consumption current Typ. 43 mA At 10 mW / 3 V Max. 47 mA
Typ. 33 mA At 1 mW / 3V Max. 37 mA
Transmitter part
RF output power 10 mW / 1mW Selectable
Frequency stability Max. +/- 4 ppm - 20 to 60°C with reference frequency at 25°C
Deviation +/- 2.1 kHz +/- 0.4 kHz PN9, 4800 bps, LPF 20 kHz, (-20 to + 60°C)
Residual FM noise 0.17 kHz DI = L, LPF 20 kHz
Modulation freq. characteristics +/- 3 dB 50 to 2400 Hz
Spurious emission
- 54 dBm 47M-74M, 87.5M-118M, 174M-230M, 470M –862M
- 36 dBm Other frequencies below 1000 MHz
- 30 dBm Frequencies above 1000 MHz
Adjacent ch leakage power -37 dBm CH 25 kHz, BW 16 kHz, PN9, 4800 bps
Start up time 50 ms From power on *
2
35 ms Time required for channel change (50 kHz step) *
3
Specifications are subject to change without prior notice
*1 Initial frequency tolerance: At delivery
Initial frequency tolerance is defined as frequency drift within 1 year after the final adjustment
*2 Start up time from power on
Time required for the TX frequency to reach within +/-1.5ppm of a stable frequency after power on
*3 Start up time for channel change
Time required for the TX frequency to reach within +/-1.5ppm of a stable frequency after channel is selected

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CDP-RX-02F(P)-R Receiver
All ratings at 25°C +/- 5°C unless otherwise noted
Parameter Rating Conditions
General characteristics
Applicable standard EN 300 220 –2
Communication method One way
Emission class F1D
Operating frequency range 433.1875 – 434.7750 MHz
Operating temperature range -20 to + 60 °C No dew condensation
Storage temperature range -30 to + 70 °C No dew condensation
Aging rate Max. +/- 1 ppm / year TX freq. / RX Local Freq.
Initial freq. tolerance Max. +/- 2 ppm At delivery *
1
Dimension 30 x 50 x 9 mm Excluding protrusion
Weight 20 g Not including the antenna
Electrical specification
Oscillation system PLL controlled VCO
Channel spacing 25 kHz
Number of RF channels 128 ch (12.5 kHz step) Default channel at delivery (434.775 MHz)
Data rate 300 to 4800 bps (Pulse length Min. 208 us Max. 20 ms)
DI input level L = Gnd H = 3V to Vcc
Data polarity Positive TX DI vs RX DO
PLL reference frequency 21.25 kHz TCXO
Antenna impedance 50 ohm Nominal
Operating voltage 3 – 12 V
Consumption current Typ. 30 mA at 3 V
Typ. 33 mA at 12 V
Receiver electrical specification
Receiver type Double superheterodyne PLL synthesizer
Bit error rate (0 error /2556 bits) Typ. -116 dBm At DO 4800 bps PN9 (-20°C to + 60°C)
Bit error rate (1% bit error) Typ. -120 dBm At DO 4800 bps PN9 (-20°C to + 60°C)
Sensitivity (12 dB / SINAD) Typ. -120 dBm fm1kHz, Dev.+/-2.0kHz, CCITT (-20 to + 60°C)
Frequency stability Max. +/- 4 ppm - 20 to 60°C with reference frequency at 25°C
Adjacent channel selectivity 60 dB 2 signal / 25 kHz / BER 1% / PN9 4800 bps
Blocking 84 dB 2 signal /Reference sensitivity:-120dBm / +/-2,
+/-10 MHz / BER 1% / PN9 4800 bps
Spurious radiation - 60 dBm Below 1 GHz
- 50 dBm Above 1 GHz
Distortion - 30 dB 1 kHz Dev =+/-2.0 kHz CCITT (RF level –30 dBm)
S/N ratio 35 dB 1 kHz Dev =+/-2.0 kHz CCITT (RF level –30 dBm)
RSSI 230 mV +/- 50 mV At –113 dBm
AF output level 145 mV +/- 30 mV fmod = +/-2.0 kHz fm = 1.2 kHz (RF level -30 dBm)
110 mV +/- 30 mV fmod = +/-2.0 kHz fm = 2.4 kHz (RF level -30 dBm)
RSSI rising time Typ. 20 ms / Max. 50 ms Channel change (50 kHz) (-20°C to + 60°C)
Typ. 40 ms / Max. 70 ms At power on (-20°C to + 60°C)
Time to valid Data out *2Typ. 50 ms / Max. 100 ms Channel change (50 kHz) (-20°C to + 60°C)
Typ. 70 ms / Max. 140 ms At power on (-20°C to + 60°C)
Specifications are subject to change without prior notice
*1 Initial frequency tolerance: At delivery
Initial frequency tolerance is defined as frequency drift within 1 year after the final adjustment
*2 Time to valid output signal:
Valid output signal is determined at the point where the Bit Error Rate meter starts detecting a 4800bps,
1010.. repeated signal.
The valid output signal varies with the temperature conditions. You must conduct field testing to verify the
waiting time for a valid output signal in the user system.

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PIN DESCRIPTION
CDP-TX-02F(P)-R
Pin name I/O Description Equivalent circuit
ANT O RF output terminal
Antenna impedance nominal 50 Ω
GND I
The ground for the power supply.
Connect it to the ground plane as well as
to the bottom part of the case. The
ground plane has an impact on the range
and the stability of operation.
VCC I
The power supply terminal. The supply
voltage is DC 3.0 to 12 V. Power supply
noise and ripple have an impact on
performance, so eliminate them as far as
possible with filters and capacitors.
DATAIN I Digital data input terminal
Interface voltage: H = Vcc L = GND

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CDP-RX-02F(P)-R
Pin name I/O Description Equivalent circuit
ANT O RF input terminal
Antenna impedance nominal 50 Ω
GND I
The ground for the power supply.
Connect it to the ground plane as
well as to the bottom part of the case.
The ground plane has an impact on
the range and the stability of
operation.
VCC I
The power supply terminal. The
supply voltage is DC 3.0 to 12 V.
Power supply noise and ripple have
an impact on performance, so
eliminate them as far as possible with
filters and capacitors.
RSSI O
The receive level output of the
receiver.
The strength of the RF level (electric
field intensity) is output as a direct-
current voltage.
DATA I Digital data output terminal
Interface voltage: H = Vcc L = GND
AF O
The demodulated output of the
receiver. The DC offset is about 1 V.
Refer to the specifications for the
amplitude level.

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CHANNEL AND FREQUENCY SETTINGS
By use of a chip mounted 7-bit switch or pins and a jumper on the PCB, you can select easily between the 128
channels. Before shipment all the modules are set to 434.775 MHz
Ch
Freq. 7-bit Switch or PIN status *
(MHz) 1234567
0 433.1875 ON ON ON ON ON ON ON
1 433.2000 OFF ON ON ON ON ON ON
2 433.2125 ON OFF ON ON ON ON ON
3 433.2250 OFF OFF ON ON ON ON ON
4 433.2375 ON ON OFF ON ON ON ON
5 433.2500 OFF ON OFF ON ON ON ON
6 433.2625 ON OFF OFF ON ON ON ON
7 433.2750 OFF OFF OFF ON ON ON ON
8 433.2875 ON ON ON OFF ON ON ON
9 433.3000 OFF ON ON OFF ON ON ON
10 433.3125 ON OFF ON OFF ON ON ON
11 433.3250 OFF OFF ON OFF ON ON ON
12 433.3375 ON ON OFF OFF ON ON ON
13 433.3500 OFF ON OFF OFF ON ON ON
14 433.3625 ON OFF OFF OFF ON ON ON
15 433.3750 OFF OFF OFF OFF ON ON ON
16 433.3875 ON ON ON ON OFF ON ON
17 433.4000 OFF ON ON ON OFF ON ON
18 433.4125 ON OFF ON ON OFF ON ON
19 433.4250 OFF OFF ON ON OFF ON ON
20 433.4375 ON ON OFF ON OFF ON ON
21 433.4500 OFF ON OFF ON OFF ON ON
22 433.4625 ON OFF OFF ON OFF ON ON
23 433.4750 OFF OFF OFF ON OFF ON ON
24 433.4875 ON ON ON OFF OFF ON ON
25 433.5000 OFF ON ON OFF OFF ON ON
26 433.5125 ON OFF ON OFF OFF ON ON
27 433.5250 OFF OFF ON OFF OFF ON ON
28 433.5375 ON ON OFF OFF OFF ON ON
29 433.5500 OFF ON OFF OFF OFF ON ON
30 433.5625 ON OFF OFF OFF OFF ON ON
31 433.5750 OFF OFF OFF OFF OFF ON ON
32 433.5875 ON ON ON ON ON OFF ON
33 433.6000 OFF ON ON ON ON OFF ON
34 433.6125 ON OFF ON ON ON OFF ON
35 433.6250 OFF OFF ON ON ON OFF ON
36 433.6375 ON ON OFF ON ON OFF ON
37 433.6500 OFF ON OFF ON ON OFF ON
38 433.6625 ON OFF OFF ON ON OFF ON
39 433.6750 OFF OFF OFF ON ON OFF ON
40 433.6875 ON ON ON OFF ON OFF ON
41 433.7000 OFF ON ON OFF ON OFF ON
42 433.7125 ON OFF ON OFF ON OFF ON

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Ch
Freq. 7-bit Switch or PIN status *
(MHz) 1234567
43 433.7250 OFF OFF ON OFF ON OFF ON
44 433.7375 ON ON OFF OFF ON OFF ON
45 433.7500 OFF ON OFF OFF ON OFF ON
46 433.7625 ON OFF OFF OFF ON OFF ON
47 433.7750 OFF OFF OFF OFF ON OFF ON
48 433.7875 ON ON ON ON OFF OFF ON
49 433.8000 OFF ON ON ON OFF OFF ON
50 433.8125 ON OFF ON ON OFF OFF ON
51 433.8250 OFF OFF ON ON OFF OFF ON
52 433.8375 ON ON OFF ON OFF OFF ON
53 433.8500 OFF ON OFF ON OFF OFF ON
54 433.8625 ON OFF OFF ON OFF OFF ON
55 433.8750 OFF OFF OFF ON OFF OFF ON
56 433.8875 ON ON ON OFF OFF OFF ON
57 433.9000 OFF ON ON OFF OFF OFF ON
58 433.9125 ON OFF ON OFF OFF OFF ON
59 433.9250 OFF OFF ON OFF OFF OFF ON
60 433.9375 ON ON OFF OFF OFF OFF ON
61 433.9500 OFF ON OFF OFF OFF OFF ON
62 433.9625 ON OFF OFF OFF OFF OFF ON
63 433.9750 OFF OFF OFF OFF OFF OFF ON
64 433.9875 ON ON ON ON ON ON OFF
65 434.0000 OFF ON ON ON ON ON OFF
66 434.0125 ON OFF ON ON ON ON OFF
67 434.0250 OFF OFF ON ON ON ON OFF
68 434.0375 ON ON OFF ON ON ON OFF
69 434.0500 OFF ON OFF ON ON ON OFF
70 434.0625 ON OFF OFF ON ON ON OFF
71 434.0750 OFF OFF OFF ON ON ON OFF
72 434.0875 ON ON ON OFF ON ON OFF
73 434.1000 OFF ON ON OFF ON ON OFF
74 434.1125 ON OFF ON OFF ON ON OFF
75 434.1250 OFF OFF ON OFF ON ON OFF
76 434.1375 ON ON OFF OFF ON ON OFF
77 434.1500 OFF ON OFF OFF ON ON OFF
78 434.1625 ON OFF OFF OFF ON ON OFF
79 434.1750 OFF OFF OFF OFF ON ON OFF
80 434.1875 ON ON ON ON OFF ON OFF
81 434.2000 OFF ON ON ON OFF ON OFF
82 434.2125 ON OFF ON ON OFF ON OFF
83 434.2250 OFF OFF ON ON OFF ON OFF
84 434.2375 ON ON OFF ON OFF ON OFF
85 434.2500 OFF ON OFF ON OFF ON OFF
86 434.2625 ON OFF OFF ON OFF ON OFF
87 434.2750 OFF OFF OFF ON OFF ON OFF
88 434.2875 ON ON ON OFF OFF ON OFF
89 434.3000 OFF ON ON OFF OFF ON OFF

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Ch
Freq. 7-bit Switch or PIN status *
(MHz) 1234567
90 434.3125 ON OFF ON OFF OFF ON OFF
91 434.3250 OFF OFF ON OFF OFF ON OFF
92 434.3375 ON ON OFF OFF OFF ON OFF
93 434.3500 OFF ON OFF OFF OFF ON OFF
94 434.3625 ON OFF OFF OFF OFF ON OFF
95 434.3750 OFF OFF OFF OFF OFF ON OFF
96 434.3875 ON ON ON ON ON OFF OFF
97 434.4000 OFF ON ON ON ON OFF OFF
98 434.4125 ON OFF ON ON ON OFF OFF
99 434.4250 OFF OFF ON ON ON OFF OFF
100 434.4375 ON ON OFF ON ON OFF OFF
101 434.4500 OFF ON OFF ON ON OFF OFF
102 434.4625 ON OFF OFF ON ON OFF OFF
103 434.4750 OFF OFF OFF ON ON OFF OFF
104 434.4875 ON ON ON OFF ON OFF OFF
105 434.5000 OFF ON ON OFF ON OFF OFF
106 434.5125 ON OFF ON OFF ON OFF OFF
107 434.5250 OFF OFF ON OFF ON OFF OFF
108 434.5375 ON ON OFF OFF ON OFF OFF
109 434.5500 OFF ON OFF OFF ON OFF OFF
110 434.5625 ON OFF OFF OFF ON OFF OFF
111 434.5750 OFF OFF OFF OFF ON OFF OFF
112 434.5875 ON ON ON ON OFF OFF OFF
113 434.6000 OFF ON ON ON OFF OFF OFF
114 434.6125 ON OFF ON ON OFF OFF OFF
115 434.6250 OFF OFF ON ON OFF OFF OFF
116 434.6375 ON ON OFF ON OFF OFF OFF
117 434.6500 OFF ON OFF ON OFF OFF OFF
118 434.6625 ON OFF OFF ON OFF OFF OFF
119 434.6750 OFF OFF OFF ON OFF OFF OFF
120 434.6875 ON ON ON OFF OFF OFF OFF
121 434.7000 OFF ON ON OFF OFF OFF OFF
122 434.7125 ON OFF ON OFF OFF OFF OFF
123 434.7250 OFF OFF ON OFF OFF OFF OFF
124 434.7375 ON ON OFF OFF OFF OFF OFF
125 434.7500 OFF ON OFF OFF OFF OFF OFF
126 434.7625 ON OFF OFF OFF OFF OFF OFF
127 434.7750 OFF OFF OFF OFF OFF OFF OFF
* Channel No. 127 : Default setting
Channel Table
7 bit switch: ON = L (GND) OFF = H (Open)
PIN status: ON = L (Short to GND pin) OFF = H (Open)

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Position of the SW and Pins.
CDP-TX-02F-R CDP-TX-02FP-R
CDP-RX-02F-R CDP-RX-02FP-R
POWER SETTING
CDP-TX-02F(P)-R can be set to either 10 mW or 1 mW by a jumper on the PCB.
Power Setting (Switch: ON = “L” / OFF = “H”)
10 mW: Jumper ON (Default) 1 mW: Jumper OFF
Note:
The power level limit of the 434 MHz ISM band in Europe is defined as below. Please choose the maximum
power and duty cycle allowed by the regulations.
Frequency band Power Duty cycle Channel spacing
433.050 MHz – 434.790 MHz 10 mW e.r.p. <10% No spacing
433.050 MHz – 434.790 MHz 1 mW e.r.p.
- 13 dBm/10kHz Up to 100% No spacing
434.040 MHz – 434.790 MHz 10 mW e.r.p. Up to 100% Up to 25 kHz
GND
GND

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ANTENNAS
The most important factors for safe data transmission are a good antenna and RF grounding, both for the
transmitter and the receiver. Without an antenna it is impossible to transmit data over a long distance.
The standard antenna is a Lambda/4 wire protected by a plastic cover.
The receiver has a simple antenna input pin. Any suitable UHF antenna can be connected to it.
The easiest way to connect an antenna to the CDP-RX-02F-R is to solder a 17 cm wire directly to the antenna
input. A 50 Ohm coaxial cable can be used to extend the distance between the antenna and the receiver. The
shielding of the antenna wire should be soldered to the case near the antenna input of the CDP-RX-02F-R.
It is possible, but not recommended to connect the receiver module and the antenna by a connection on the
PCB. This will decrease the receiver performance in most cases.
To find the best method of installation for the transmitter and receiver, many things should be considered and
tested. It is recommended that you read specialized literature on antennas and radiation characteristics to gain
a better understanding of these fields. A detailed explanation cannot be given here.
Notice: For CDP-TX-02F-R and CDP-TX-02FP-R, use the antenna provided. Using other antennas may
invalidate compliance with the regulatory standards. Refer to the REGULATORY COMPLIANCE
INFORMATION in this document.
In most cases the following basic rules will help you.
• Connect an antenna with 50 Ohm impedance for 434 MHz.
• The easiest construction is a wire of approximately 17 cm.
• Place the antenna vertically, straight up or down from the transmitter and receiver module.
• Do not cover the antenna with metal parts.
• The connection of the metal surface of the transmitter and receiver case to a larger metal part (ground
plane) will increase radiation and reception efficiency. These metal parts should not be placed near the
antenna.
• The best range is achieved if the transmitter and receiver antenna are in direct line of sight. Any object in
between the transmitter and receiver antenna, and metallic objects in particular, will decrease the range.
• The transmission is influenced by reflections of the transmitter signal on metallic surfaces. By overlaying
the direct and reflected signal with a 180 degree phase shift the signal can almost fade out. These
reflections and fade-outs can result in data drop-outs in mobile applications.
• The human body can have a similar effect as metal objects. Pocket transmitters should be held in your
hand, held in a position away from the body and pointed in the direction of the receiver.

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BLOCK DIAGRAM <CDP-TX-02F-R>

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<CDP-RX-02F-R>

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DIMENSIONS
<CDP-TX-02F-R>
Reference hole position for PCB mounting
(Top view)

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<CDP-RX-02F-R>
Reference hole position for PCB mounting (Top view)

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OPERATION GUIDE
TEST DATA
0
100
200
300
400
500
600
700
800
-130 -120 -110 -100 -90 -80 -70 -60 -50 -40 -30 -20 -10 0
R
S
S
I
[
m
V
]
INPUT LEVEL [dBm]
RSSI characteristics
MIN
TYP
MAX

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OPERATION GUIDE
Regulatory compliance information
Declaration of Conformity
Hereby, Circuit Design, Inc. declares that the CDP-TX-02F-R and CDP-RX-02F-R are in compliance with
RE Directive (2014/53/EU).
The full text of the EU Declaration of Conformity is available at www.circuitdesign.jp.
Cautions related to regulatory compliance when embedding the CDP-TX-02E-R and CDP-RX-
02E-R
1. Duty cycle
The CDP-TX-02F-R and CDP-RX-02F-R are designed to be used in the EU wide harmonised frequency
bands for shor range devices. The CDP-TX-02F-R continuously emits carrier signals when power is supplied.
The user must design the final product to meet the relevant duty cycle requirement (For more detais, refer to
the EN300 220-2).
2. Antenna
The CDP-TX-02F-R is supplied without a dedicated antenna.
The conformity assessment of the CDP-TX-02F-R was performed using Circuit Design’s standard antenna
ANT-LEA-01 (1/4 lambda lead antenna), so we recommend using the ANT-LEA-01 antenna or an antenna
with equivalent characteristics (2.14 dBi or less). For details about our standard antenna, refer to
www.circuitdesign.jp or contact us. If you use an antenna other than the recommended antenna, further
radio conformity assessment may be required.
3. Supply voltage
The CDP-TX-02F-R should be used within the specified voltage range (3.0 V to 12.0 V).
4. Enclosure
To fulfill the requirements of EMC and safety requirements, the CDP-TX-02F-R and CDP-RX-02F-R should
be mounted on the circuit board of the final product and must be enclosed in the case of the final product. No
surface of the module should be exposed.
Conformity assessment of the final product
The manufacturer of the final system needs to conduct full EMC testing in the final configuration and also
ensure the final product fulfills the health and safety requirements and is also responsible for the conformity
assessment procedures of the final product in accordance with the RE Directive.

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OPERATION GUIDE
Important notice
Customers are advised to consult with Circuit Design sales representatives before ordering.
Circuit Design believes the provided information is accurate and reliable. However, Circuit Design reserves
the right to make changes to this product without notice.
Circuit Design products are neither designed nor intended for use in life support applications where
malfunction can reasonably be expected to result in significant personal injury to the user. Any use of Circuit
Design products in such safety-critical applications is understood to be fully at the risk of the customer and
the customer must fully indemnify Circuit Design, Inc for any damages resulting from any improper use.
As the radio module communicates using electronic radio waves, there are cases where transmission will be
temporarily cut off due to the surrounding environment and method of usage. The manufacturer is exempt
from all responsibility relating to resulting harm to personnel or equipment and other secondary damage.
The manufacturer is exempt from all responsibility relating to secondary damage resulting from the operation,
performance and reliability of equipment connected to the radio module.
Copyright
All rights in this operation guide are owned by Circuit Design, Inc. No part of this document may be copied
or distributed in part or in whole without the prior written consent of Circuit Design, Inc.
Cautions
Do not use the equipment within the vicinity of devices that may malfunction as a result of electronic radio
waves from the radio module.
Communication performance will be affected by the surrounding environment, so communication tests should
be carried out before actual use.
Ensure that the power supply for the radio module is within the specified rating. Short circuits and reverse
connections may result in overheating and damage and must be avoided at all costs.
Ensure that the power supply has been switched off before attempting any wiring work.
The case is connected to the GND terminal of the internal circuit, so do not make contact between the '+' side
of the power supply terminal and the case.
When batteries are used as the power source, avoid short circuits, recharging, dismantling, and pressure.
Failure to observe this caution may result in the outbreak of fire, overheating and damage to the equipment.
Remove the batteries when the equipment is not to be used for a long period of time. Failure to observe this
caution may result in battery leaks and damage to the equipment.
Do not use this equipment in vehicles with the windows closed, in locations where it is subject to direct
sunlight, or in locations with extremely high humidity.
The radio module is neither waterproof nor splash proof. Ensure that it is not splashed with soot or water. Do
not use the equipment if water or other foreign matter has entered the case.
Do not drop the radio module or otherwise subject it to strong shocks.
Do not subject the equipment to condensation (including moving it from cold locations to locations with a
significant increase in temperature.)
Do not use the equipment in locations where it is likely to be affected by acid, alkalis, organic agents or
corrosive gas.
Do not bend or break the antenna. Metallic objects placed in the vicinity of the antenna will have a great
effect on communication performance. As far as possible, ensure that the equipment is placed well away
from metallic objects.
The GND for the radio module will also affect communication performance. If possible, ensure that the case
GND and the circuit GND are connected to a large GND pattern.
Warnings
Do not take a part or modify the equipment.
Do not remove the product label (the label attached to the upper surface of the module.) Using a module from
which the label has been removed is prohibited.
Copyright 2017, Circuit Design, Inc.

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OPERATION GUIDE
REVISION HISTORY
Version Date Description Remark
1.0 Jan. 2007 CDP-TX/RX-02F-R 434MHz The first issue
1.1 Feb. 2007 DOC updated Page 19
1.2 Mar. 2008 DOC updated Page 19
1.3 May 2008 Addition of note Page 18
1.4 Feb. 2009 DOC updated, Important notice added Page 19 & 20
1.5 Feb.2011 DOC updated Page 19
1.6 Feb.2014 DOC and TX block diagram updated Page 13 & 19
1.7 Sep.2015 DOC updated Page 19
2.0 Jun. 2016 RSSI specification & characteristics, Equivalent circuit, DOC
updated
Page
5,6,7,15,17
3.0 June 2017 Update according to RED requirements