CIRCUIT DESIGN STD-302N-R Specifications

CIRCUIT DESIGN STD-302N-R Specifications
OPERATION GUIDE
UHF Narrow band radio transceiver
STD-302N-R
434MHz
Operation Guide
Version 1.5 (Feb. 2014)
CIRCUIT DESIGN, INC.,
7557-1 Hotaka, Azumino
Nagano 399-8303 JAPAN
Tel: + +81-(0)263-82-1024
Fax: + +81-(0)263-82-1016
e-mail: [email protected]
http://www.cdt21.com
OG_STD-302N-R_v15e
OPERATION GUIDE
CONTENTS
GENERAL DESCRIPTION & FEATURES ...........................3
SPECIFICATIONS
STD-302N-R 434 MHz .......................4
PIN DESCRIPTION .............................................................6
BLOCK DIAGRAM...............................................................8
DIMENSIONS......................................................................9
PLL IC CONTROL .............................................................10
PLL IC control ..................................................................10
How to calculate the setting values for the PLL register ........ 11
Method of serial data input to the PLL .................................12
TIMING CHART.................................................................13
PLL FREQUENCY SETTING REFERENCE .....................15
TEST DATA .......................................................................17
REGULATORY COMPLIANCE INFORMATION ................19
CAUTIONS & WARNINGS ................................................20
REVISION HISTORY.........................................................21
OG_STD-302N-R_v15e
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Circuit Design, Inc.
OPERATION GUIDE
GENERAL DESCRIPTION & FEATURES
General Description
The UHF FM narrow band semi-duplex radio data module STD-302N-R is a R&TTE and RoHS
compliant, high performance transceiver designed for use in industrial applications requiring long
range, high performance and reliability.
All high frequency circuits are enclosed inside a robust housing to provide superior resistance
against shock and vibration. A narrow band technique enables high interference rejection and
concurrent operation with multiple modules.
STD-302N-R, a narrowband module with 25 kHz channel steps, achieves high TX/RX switching
speed, making it an ideal RF unit for inclusion in feedback systems.
Features






10 mW RF power, 3.0 V operation
Programmable RF channel
Fast TX/RX switching time
High sensitivity -119 dBm
Excellent mechanical durability, high vibration & shock resistance
R&TTE (EN 300 220) / RoHS compliance
Applications

Telemetry
Water level monitor for rivers, dams, etc.
Monitoring systems for environmental data such as temperature, humidity, etc.
Transmission of measurement data (pressure, revolution, current, etc) to PC
Security alarm monitoring
 Telecontrol
Industrial remote control systems
Remote control systems for factory automation machines
Control of various driving motors
 Data transmission
RS232/RS485 serial data transmission
OG_STD-302N-R_v15e
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Circuit Design, Inc.
OPERATION GUIDE
SPECIFICATIONS
STD-302N-R 434 MHz
All ratings at 25 +/-10 °C unless otherwise noted
General characteristics
Item
Applicable standard
Communication method
Emission class
Operating frequency range
Operation temperature range
Storage temperature range
Aging rate
Initial frequency tolerance
Dimensions
Weight
Units
MHz
°C
°C
ppm
ppm
mm
g
MIN
TYP
MAX
EN 300 220
Simplex, Half-duplex
F1D
433.050
434.775
-20
60
-30
75
-1
1
-1.5
1.5
30 x 50 x 9 mm
25 g
Remarks
No dew condensation
No dew condensation
TX freq., RX Lo freq.
TX freq., RX Lo freq.
Not including antenna
Electrical specification <Common>
Item
Oscillation type
Frequency stability (-20 to 60°C)
TX/RX switching time
Channel step
Data rate
Max. pulse width
Min. pulse width
Data polarity
PLL reference frequency
PLL response
Antenna impedance
Operating voltage
TX consumption current
RX consumption current
ppm
ms
kHz
bps
ms
us
MHz
ms
Ω
V
mA
mA
MIN
TYP
MAX
PLL controlled VCO
-4
4
15
20
25
2400
9600
15
100
Positive
21.25
30
60
50
3.0
5.5
44
48
26
30
Remarks
Reference frequency at 25 °C
DI/DO
DO/DI
DO/DI
DO/DI
DO/DI
TCXO
from PLL setting to LD out
Nominal
Vcc = 3.0 V
Vcc = 3.0 V
Transmitter part
Item
RF output power
Deviation
DI input level
Residual FM noise
mW
kHz
V
kHz
Spurious emission
dBm
Adjacent CH power
dBm
OG_STD-302N-R_v15e
MIN
2.35
0
TYP
10
2.75
MAX
3.15
5.5
0.17
-54
-36
-30
-37
4
Remarks
Conducted 50 Ω
PN9 9600 bps
L= GND, H = 3 V- Vcc
DI=L, LPF=20 kHz
47-74, 87.5-118, 174-230, 470-862 MHz
Other frequencies below 1000 MHz
Frequencies above 1000 MHz
PN9 9600 bps CH25kHz/BW16kHz
Circuit Design, Inc.
OPERATION GUIDE
Receiver part
Item
Receiver type
1st IF frequency
2nd IF frequency
Maximum input level
BER (0 error/2556 bits) *1
BER (1 % error) *2
Sensitivity 12dB/ SINAD
MHz
kHz
dBm
dBm
dBm
dBm
Spurious response rejection *3
dB
Adjacent CH selectivity *3
Intermodulation *4
DO output level
dB
dB
V
RSSI rising time
ms
Time until valid Data-out *5
ms
Spurious radiation
dBm
RSSI
mV
MIN
TYP
MAX
Double superheterodyne
21.7
450
10
-107
-110
-116
-119
80
60
50
50
0
2.8
30
50
50
70
50
100
70
120
-57
-47
180
230
280
Remarks
At 434.05MHz PN 9 9600bps
At 434.05MHz PN 9 9600bps
fm1 k/ dev 2.75 kHz CCITT
1 st Mix, 2 signal method, 1 % error
2 nd Mix, 2 signal method, 1 % error
+/- 25 kHz, 2 signal method, 1 % error
2 signal method, 1 % error
L = GND H = 2.8 V
CH shift of 25 kHz (from PLL setup)
When power ON (from PLL setup)
CH shift of 25 kHz (from PLL setup)
When power ON (from PLL setup)
Below 1000 MHz
Above 1000 MHz
With -113 dBm at 434.05MHz
Specifications are subject to change without prior notice
Notice
 The time required until a stable DO is established may get longer due to the possible frequency drift
caused by operation environment changes, especially when switching from TX to RX, from RX to TX and
changing channels. Please make sure to optimize the timing. The recommended preamble is more than
20 ms.
 Antenna connection is designed as pin connection.
 RF output power, sensitivity, spurious emission and spurious radiation levels may vary with the pattern
used between the RF pin and the coaxial connection. Please make sure to verify those parameters
before use.
 The feet of the shield case should be soldered to the wide GND pattern to avoid any change in
characteristics.
Notes about the specification values
*1 BER: RF level where no error per 2556 bits is confirmed with the signal of PN9 and 9600 bps.
*2 BER (1 % error) : RF level where 1% error per 2556 bits is confirmed with the signal of PN9 and 9600 bps.
*3 Spurious response, CH selectivity: Jamming signal used in the measurement is unmodulated.
*4 Intermodulation: Ratio between the receiver input level with BER 1% and the signal level (PN9 9600 bps)
added at the points of 'Receiving frequency - 200 kHz ' + ' Receiving frequency -100kHz' with which BER 1%
is achieved.
*5 Time until valid Data-out : Valid DO is determined at the point where Bit Error Rate meter starts detecting
the signal of 9600bps, 1010repeated signal.
All specifications are specified based on the data measured in a shield room using the PLL setting controller
board prepared by Circuit Design.
Measuring equipment:
SG=ANRITUS communication analyzer MT2605
Spectrum analyzer = ANRITSU MS2663G
BER measure = ANRITSU MP1201G
OG_STD-302N-R_v15e
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Circuit Design, Inc.
OPERATION GUIDE
PIN DESCRIPTION
Pin name
I/O
Description
Equivalent circuit
47P
SAW FILTER
RF
I/O
RF
RF input terminal
Antenna impedance nominal 50 Ω
100nH
GND
GND
I
GROUND terminal
The GND pins and the feet of the shield case
shoud be connected to the wide GND
pattern.
VCC
2.8V
VCC
TXSEL
I
Power supply terminal
DC 3.0 to 5.5 V
I
TX select terminal
GND = TXSEL active
To enable the transmitter circuits, connect
TXSEL to GND and RXSEL to OPEN or 2.8
V.
REG
22µ
O
Analogue output terminal
There is DC offset of approx. 1 V.
Refer to the specification table for amplitude
level.
MB15E03
I
PLL data setting input terminal
Interface voltage H = 2.8 V, L = 0 V
MB15E03
DATA
I
PLL data setting input terminal
Interface voltage H = 2.8 V, L = 0 V
LE
I
PLL data setting input terminal
Interface voltage H = 2.8 V, L = 0 V
CLK
OG_STD-302N-R_v15e
6
20K
TXSEL
I
AF
47P
2.8V
10
2.8V
RX select terminal
GND= RXSEL active
To enable the receiver circuits, connect
RXSEL to GND and TXSEL to OPEN or 2.8
V.
RXSEL
10µ
47P
2.8V
10
20K
2.8V
RXSEL
2K
CLK
2K
DATA
2K
LE
MB15E03
Circuit Design, Inc.
OPERATION GUIDE
2.8V
LD
O
PLL lock/unlock monitor terminal
Lock = H (2.8 V), Unlock = L (0 V)
2K
LD
MB15E03
102
RSSI
O
Received Signal Strength Indicator terminal
2.8V
DO
DI
O
I
OG_STD-302N-R_v15e
Data output terminal
Interface voltage: H=2.8V, L=0V
10K
2K
DO
102
Data input terminal
Interface voltage: H=2.8V to Vcc, L=0V
Input data pulse width Min.100 μs Max. 15
ms
7
Circuit Design, Inc.
OPERATION GUIDE.
BLOCK DIAGRAM
OG_STD-302N-R_v15e
<STD-302N-R 434MHz>
8
Circuit Design, Inc.
OPERATION GUIDE.
DIMENSIONS
OG_STD-302N-R_v15e
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Circuit Design, Inc.
OPERATION GUIDE
.
PLL IC CONTROL

PLL IC control
Figure 1
up to 1200MHz
VCO
2kohm
Voltage Controled
Oscillator
Fin
CLK
Xf in
Data
2kohm
2kohm
LE
GND
LPF
PLL
Do
+2.8v
LE
PS
VCC
ZC
2kohm
21.25MHz
DATA
MB15E03SL
Vp
Reference Oscillator
CLK
LD/f out
OSCout
P
OSCin
R
LD
STD-302
Control pin name
#:Control v oltage = +2.8v
STD-302N-R is equipped with an internal PLL frequency synthesizer as shown in Figure 1. The operation of
the PLL circuit enables the VCO to oscillate at a stable frequency. Transmission frequency is set externally by
the controlling IC. STD-302N-R has control terminals (CLK, LE, DATA) for the PLL IC and the setting data is
sent to the internal register serially via the data line. Also STD-302N-R has a Lock Detect (LD) terminal that
shows the lock status of the frequency. These signal lines are connected directly to the PLL IC through a 2 kΩ
resistor.
The interface voltage of STD-302N-R is 2.8 V, so the control voltage must be the same.
STD-302N-R comes equipped with a Fujitsu MB15E03SL PLL IC. Please refer to the manual of the PLL IC.
The following is a supplementary description related to operation with STD-302N-R. In this description, the
same names and terminology as in the PLL IC manual are used, so please read the manual beforehand.
OG_STD-302N-R_v15e
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Circuit Design, Inc.
OPERATION GUIDE

.
How to calculate the setting values for the PLL register
The PLL IC manual shows that the PLL frequency setting value is obtained with the following equation.
-- Equation 1
fvco = [(M x N)+A] x fosc / R
fvco : Output frequency of external VCO
M: Preset divide ratio of the prescaler (64 or 128)
N: Preset divide ratio of binary 11-bit programmable counter (3 to 2,047)
A: Preset divide ratio of binary 7-bit swallow counter (0 ≤ A ≤ 127 A<N))
fosc: Output frequency of the reference frequency oscillator
R: Preset divide ratio of binary 14-bit programmable reference counter (3 to 16,383)
With STD-302N-R, there is an offset frequency (foffset) 21.7 MHz for the transmission RF channel frequency fch.
Therefore the expected value of the frequency generated at VCO (fexpect) is as below.
fvco = fexpect = fch – foffset ---- Equation 2
The PLL internal circuit compares the phase to the oscillation frequency fvco. This phase comparison
frequency (fcomp) must be decided. fcomp is made by dividing the frequency input to the PLL from the reference
frequency oscillator by reference counter R. STD-302N-R uses 21.25 MHz for the reference clock fosc. fcomp is
one of 6.25 kHz, 12.5 kHz or 25 kHz.
The above equation 1 results in the following with n = M x N + A, where “n” is the number for division.
n = fvco/fcomp ---- Equation 4 note: fcomp = fosc/R
fvco=n*fcomp ---- Equation 3
Also, this PLL IC operates with the following R, N, A and M relational expressions.
N = INT (n / M) ---- Equation 6
A = n - (M x N) ---- Equation 7
R=fosc/fcomp ---- Equation 5
INT: integer portion of a division.
As an example, the setting value of RF channel frequency fch 869.725 MHz can be calculated as below.
The constant values depend on the electronic circuits of STD-302N-R.
Conditions:
Channel center frequency:
fch = 869.725 MHz
Constant: Offset frequency:
foffset=21.7 MHz
Constant: Reference frequency:
fosc=21.25 MHz
Set 25 kHz for Phase comparison frequency and 64 for Prescaler value M
The frequency of VCO will be
fvco = fexpect = fch - foffset = 869.725 –21.7 = 848.025MHz
Dividing value “n” is derived from Equation 4
n = fvco / fcomp = 848.025MHz/25kHz = 33921
Value “R” of the reference counter is derived from Equation 5.
R = fosc/fcomp = 21.25MHz/25kHz = 850
Value “N” of the programmable counter is derived from Equation 6.
N = INT (n/M) = INT(33921/64) = 530
Value “A“ of the swallow counter is derived from Equation 7.
A = n – (M x N) = 33921 – 64 x 530 = 1
The frequency of STD-302N-R is locked at a center frequency fch by inputting the PLL setting values N, A and
R obtained with the above equations as serial data. The above calculations are the same for the other
frequencies.
Excel sheets that contain automatic calculations for the above equations can be found on our web site
(www.cdt21.com/).
The result of the calculations is arranged as a table in the CPU ROM. The table is read by the channel
change routine each time the channel is changed, and the data is sent to the PLL.
OG_STD-302N-R_v15e
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Circuit Design, Inc.
OPERATION GUIDE

.
Method of serial data input to the PLL
After the RF channel table plan is decided, the data needs to be allocated to the ROM table and read from
there or calculated with the software.
Together with this setting data, operation bits that decide operation of the PLL must be sent to the PLL.
The operation bits for setting the PLL are as follows. These values are placed at the head of the reference
counter value and are sent to the PLL.
1.
CS: Charge pump current select bit
CS = 0
+/-1.5 mA select
VCO is optimized to +/-1.5 mA
2.
LDS: LD/fout output setting bit
LDS = 0
LD select
Hardware is set to LD output
3.
FC: Phase control bit for the phase comparator
FC = 1
Hardware operates at this phase
Figure 2
1st Data
2nd Data
2nd data
N11
N10
N9
N8
N7
N6
A1
CNT=0
1st data
CS
LDS
FC
SW
R14
R13
R1
CNT=1
Inv alid Data
DATA
MSB
LSB
CLK
t1
t2
t6
t3
t0
LE
STD-302
terminal name
#: t0,t5 >= 100 ns
t1,t2,t6 >= 20 ns
t3,t4 >= 30 ns
t4
t5
#: Keep the LE terminal at a low level, w hen w rite the data to the shift resister.
The PLL IC, which operates as shown in the block diagram in the manual, shifts the data to the 19-bit shift
register and then transfers it to the respective latch (counter, register) by judging the CNT control bit value
input at the end.
1. CLK [Clock]: Data is shifted into the shift register on the rising edge of this clock.
2. LE [Load Enable]: Data in the 19-bit shift register is transferred to respective latches on the rising edge of
the clock. The data is transferred to a latch according to the control bit CNT value.
3. Data [Serial Data]: You can perform either reference counter setup or programmable counter setup first.
OG_STD-302N-R_v15e
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Circuit Design, Inc.
OPERATION GUIDE
.
TIMING CHART
Control timing in a typical application is shown in Figure 3.
Initial setting of the port connected to the radio module is performed when power is supplied by the CPU and
reset is completed. MOS-FET for supply voltage control of the radio module, RXSEL and TXSEL are set to
inactive to avoid unwanted emissions. The power supply of the radio module is then turned on. When the
radio module is turned on, the PLL internal resistor is not yet set and the peripheral VCO circuit is unstable.
Therefore data transmission and reception is possible 40 ms after the setting data is sent to the PLL at the
first change of channel, however from the second change of channel, the circuit stabilizes within 20 ms and is
able to handle the data.
Changing channels must be carried out in the receive mode. If switching is performed in transmission mode,
unwanted emission occurs.
If the module is switched to the receive mode when operating in the same channel, (a new PLL setting is not
necessary) it can receive data within 5 ms of switching*1. For data transmission, if the RF channel to be used
for transmission is set while still in receiving mode, data can be sent at 5 ms after the radio module is
switched from reception to transmission*2.
Check that the Lock Detect signal is “high” 20 ms after the channel is changed. In some cases the Lock
Detect signal becomes unstable before the lock is correctly detected, so it is necessary to note if processing
of the signal is interrupted. It is recommended to observe the actual waveform before writing the process
program.
*1
DC offset may occur due to frequency drift caused by ambient temperature change. Under conditions below
-10 °C, 10 to 20 ms delay of DO output is estimated. The customer is urged to verify operation at low
temperature and optimize the timing.
*2
Sending ‘10101…..’ preamble just after switching to transmission mode enables smoother operation of the
binarization circuit of the receiver. For 9600 bps, a preamble of ‘11001100’ is effective.
Preamble length: -20 °C - +60 °C: 15 ms (Typical)
Remark
For details about PLL control and the sample programs, see our technical document ‘STD-302 interface
method’
OG_STD-302N-R_v15e
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Circuit Design, Inc.
OPERATION GUIDE
Figure 3: Timing diagram for STD-302
Status immediately after pow er comes on.
Normal status
Channel change
No channel change
CPU
Pow er on
STD-302
Pow er on
#:3
Receiv e mode
Receiv e mode
Receiv e mode
activ e period
activ e period
activ e period
Activ e period
RXSEL
CPU control,
CH change
&
Data rec.
Timing
#:1
#:2
#:4
5 ms
#:4
CH
Data #:5
CH
#:4
Data #:6
Check LD signal
Check LD signal
CH
Data #:7
Check LD signal
LD
40 ms
10 to 20 ms
Transmit mode
activ e
TXSEL
Transmit mode
activ e
Transmit mode
activ e
Data transmit
5 ms
5 ms
#:1 Reset control CPU
5 ms
#:5 40 ms later, the receiver can receive the data after changing the channel..
#:2 Initialize the port connected to the module.
#:6 10 to 20 ms later, the receiver can receive the data after changing the channel.
#:3 Supply pow er to the module after initializing CPU.
#:7 5 ms later, the data can be received if the RF channel is not changed.
#:4 RFchannel change must be performed in receiving mode.
OG_STD-302N-R_v15e
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Circuit Design, Inc.
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OPERATION GUIDE
PLL FREQUENCY SETTING DATA REFERENCE
434 MHz ISM band (433.050 - 434.790 MHz)
Parameter name
Phase Comparing Frequency Fcomp [kHz]
Start Channel Frequency Fch [MHz]
Channel Step Frequency [kHz]
Number of Channel
Prescaler M
Parameter name
Reference Frequency Fosc [MHz]
Offset Frequency Foffset [MHz]
No.
Value
: For data input
25
433.0750
25
69
64
: Result of calculation
: Fixed value
Parameter name
Reference Counter R
Programmable Counter N Min. Value
Programmable Counter N Max. Value
Swallow Counter A Min. Value
Swallow Counter A Max. Value
Value
21.25
21.7
Channel
Frequency FCH
Expect
Frequency
FEXPECT
Lock
Frequency
FVCO
(MHz)
(MHz)
(MHz)
433.0750
433.1000
433.1250
433.1500
433.1750
433.2000
433.2250
433.2500
433.2750
433.3000
433.3250
433.3500
433.3750
433.4000
433.4250
433.4500
433.4750
433.5000
433.5250
433.5500
433.5750
433.6000
433.6250
433.6500
433.6750
433.7000
433.7250
433.7500
433.7750
433.8000
433.8250
433.8500
433.8750
411.3750
411.4000
411.4250
411.4500
411.4750
411.5000
411.5250
411.5500
411.5750
411.6000
411.6250
411.6500
411.6750
411.7000
411.7250
411.7500
411.7750
411.8000
411.8250
411.8500
411.8750
411.9000
411.9250
411.9500
411.9750
412.0000
412.0250
412.0500
412.0750
412.1000
412.1250
412.1500
412.1750
411.3750
411.4000
411.4250
411.4500
411.4750
411.5000
411.5250
411.5500
411.5750
411.6000
411.6250
411.6500
411.6750
411.7000
411.7250
411.7500
411.7750
411.8000
411.8250
411.8500
411.8750
411.9000
411.9250
411.9500
411.9750
412.0000
412.0250
412.0500
412.0750
412.1000
412.1250
412.1500
412.1750
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
OG_STD-302N-R_v15e
15
Number of
Division n
16455
16456
16457
16458
16459
16460
16461
16462
16463
16464
16465
16466
16467
16468
16469
16470
16471
16472
16473
16474
16475
16476
16477
16478
16479
16480
16481
16482
16483
16484
16485
16486
16487
Value
850
257
258
0
63
Programable
Counter
N
Swallow Counter
A
257
257
257
257
257
257
257
257
257
257
257
257
257
257
257
257
257
257
257
257
257
257
257
257
257
257
257
257
257
257
257
257
257
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
Circuit Design, Inc.
OPERATION GUIDE
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
OG_STD-302N-R_v15e
433.9000
433.9250
433.9500
433.9750
434.0000
434.0250
434.0500
434.0750
434.1000
434.1250
434.1500
434.1750
434.2000
434.2250
434.2500
434.2750
434.3000
434.3250
434.3500
434.3750
434.4000
434.4250
434.4500
434.4750
434.5000
434.5250
434.5500
434.5750
434.6000
434.6250
434.6500
434.6750
434.7000
434.7250
434.7500
434.7750
412.2000
412.2250
412.2500
412.2750
412.3000
412.3250
412.3500
412.3750
412.4000
412.4250
412.4500
412.4750
412.5000
412.5250
412.5500
412.5750
412.6000
412.6250
412.6500
412.6750
412.7000
412.7250
412.7500
412.7750
412.8000
412.8250
412.8500
412.8750
412.9000
412.9250
412.9500
412.9750
413.0000
413.0250
413.0500
413.0750
412.2000
412.2250
412.2500
412.2750
412.3000
412.3250
412.3500
412.3750
412.4000
412.4250
412.4500
412.4750
412.5000
412.5250
412.5500
412.5750
412.6000
412.6250
412.6500
412.6750
412.7000
412.7250
412.7500
412.7750
412.8000
412.8250
412.8500
412.8750
412.9000
412.9250
412.9500
412.9750
413.0000
413.0250
413.0500
413.0750
16
16488
16489
16490
16491
16492
16493
16494
16495
16496
16497
16498
16499
16500
16501
16502
16503
16504
16505
16506
16507
16508
16509
16510
16511
16512
16513
16514
16515
16516
16517
16518
16519
16520
16521
16522
16523
257
257
257
257
257
257
257
257
257
257
257
257
257
257
257
257
257
257
257
257
257
257
257
257
258
258
258
258
258
258
258
258
258
258
258
258
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
0
1
2
3
4
5
6
7
8
9
10
11
Circuit Design, Inc.
OPERATION GUIDE
TEST DATA
RSSI typical output level characteristic (Purple line)
Measurement frequency: 434MHz / Modulation: unmodulated
25°C +/- 5°C
800
RSSI vs dBm
mV
700
600
500
400
300
MIN
200
RSSI(mV)
MAX
100
dBm
0
-120 -115 -110 -105 -100 -95 -90 -85 -80 -75 -70 -65 -60 -55 -50 -45 -40 -35 -30 -25 -20
Sig (dBm)
-120
-115
-110
-105
-100
-95
-90
-85
-80
-75
-70
-65
-60
-55
-50
-45
-40
-35
-30
-25
-20
MIN
134
168
202
238
270
306
346
380
410
444
482
516
558
586
596
596
598
600
600
600
600
OG_STD-302N-R_v15e
RSSI (mV)
184
218
252
288
320
356
396
430
460
494
532
566
608
636
646
646
648
650
650
650
650
MAX
234
268
302
338
370
406
446
480
510
544
582
616
658
686
696
696
698
700
700
700
700
Measurement is done with the PLL setting control
board prepared by Circuit Design.
Purple line shows typical value.
Yellow and black line shows maximum and
minimum of the specification.
17
Circuit Design, Inc.
OPERATION GUIDE
Regulatory compliance information
Regulatory compliance of the STD-302N-R
The STD-302N-R is designed for embedding in other equipment. (Products incorporating the STD-302N-R are
henceforward referred to as final products.)
The European regulation applicable to the STD-302N-R is the R&TTE Directive 1999/5/EC.The conformity
assessment for the STD-302N-R was completed in accordance with the R&TTE Directive Annex III procedures,
and the Declaration of Conformity is attached to this manual.
Note: The STD-302N-R 434MHz is intended to be used in all EU and EFTA countries.
There may be restrictions on the use of voice and audio applications in the following countries; FI, FR, HU, IT, LU,
LI, CH.
Cautions related to regulatory compliance when embedding the STD-302N-R
1. Duty cycle
The STD-302N-R is designed to be used for the Non-Specific Short Range Devices defined in the ERC/REC
70-03 Annex 1.
The STD-302N-R continuously emits carrier signals when power is supplied. The user must design the final
product to meet the requirements of the duty cycle as provided in the Regulatory parameters related to Annex 1
of the ERC/REC 70-03.
2. Antenna
The STD-302N-R is supplied without a dedicated antenna and the user is required to provide an antenna. The
conformity assessment of the STD-302N-R was performed using Circuit Design’s standard antenna ANT-LEA01 (1/4 lambda lead antenna), so we recommend using the ANT-LEA-01 antenna or an antenna with equivalent
characteristics and performance. For details about our standard antenna, refer to www.cdt21.com or contact us.
If you use an antenna other than the recommended antenna, further radio conformity assessment may be
required.
3. Supply voltage
The STD-302N-R should be used within the specified voltage range (3.0 V to 5.5 V).
4. Enclosure
To fulfill the requirements of EMC and safety requirements, the STD-302N-R should be mounted on the circuit
boards of the final products and must be enclosed in the cases of the final products. No surface of the STD302N-R should be exposed.
Conformity assessment of the final product
The manufacturer of the final product is responsible for the conformity assessment procedures of the final product
in accordance with the R&TTE Directive.
As to the conformity assessment of the R&TTE Directive Article 3.2 (Efficient use of the radio spectrum), the
manufacturer of the final product incorporating the R&TTE assessed STD-302N-R will be exempted from its
conformity assessment procedures. For details of how to use the conformity assessment of the STD-302N-R,
please consult the relevant authorities or accredited certification bodies.
Notification of the final product
The notification required by R&TTE Directive Article 6 (4) is not necessary if the final product is used in the
harmonized frequency band and is classified as Class-1 equipment. If the final product is not used in the
harmonized frequency band and is classified as Class-2 equipment, the manufacturer of the final product has a
duty to notify the relevant radio regulatory authorities in the countries where the final product is sold.
*NOTE: In case the STD-302N-R 434MHz is used with more than a 10% duty, notification of the final product will
be required. A list of Class-1 equipment is available at http://www.ero.dk/.
Exemption clause
Circuit Design, Inc does not guarantee the accuracy of the above mentioned information about the conformity
assessment and notification of the final product. Directives, technical standards, principles of operation and the like
may be interpreted differently by the authorities in each country. Also the national laws and restrictions vary with the
country. In case of doubt or uncertainty, we recommend that you check with the authorities or official certification
organizations of the relevant countries.
OG_STD-302N-R_v15e
18
Circuit Design, Inc.
OPERATION GUIDE
OG_STD-302N-R_v15e
19
Circuit Design, Inc.
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
 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.
 Do not use the equipment within the vicinity of devices that may malfunction as a result of electronic radio waves
from the radio module.
 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.
 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 2014, Circuit Design, Inc.
OG_STD-302N-R_v15e
20
Circuit Design, Inc.
OPERATION GUIDE
REVISION HISTORY
Version
1.0
1.1
1.2
1.3
1.4
1.5
Date
Jun. 2006
Feb. 2007
Oct. 2007
May 2008
Aug. 2013
Feb. 2014
OG_STD-302N-R_v15e
Description
STD-302N-R 434MHz The first issue
Correction Page 6 AF IO status “I” -> “O”
Replace drawing of product Page 9
Addition of note to the page 18 and update of DOC
DOC updated
DOC updated
21
Remark
Page 18,19
Page 19
Page 19
Circuit Design, Inc.
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