Circuit Design STD502R 2.4 GHz DSSS low power radio transceiver User Manual OG STD 502 R appr

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OPERATION GUIDE.
Operation Guide
Version 0.9 (Feb. 2013)
CIRCUIT DESIGN, INC.
7557-1 Hotaka, Azumino
Nagano 399-8303 JAPAN
Tel: 0263-82-1024
Fax: 0263-82-1016
e-mail: info@circuitdesign.jp
http://www.circuitdesign.jp
OG_STD-502-R_v09e
Circuit Design, Inc.
OPERATION GUIDE.
1. Outline
The STD-502-R operates in the 2.4 GHz band available worldwide. Designed to be embedded in
equipment, this radio transceiver module was developed for industrial applications that require stable
and reliable operation. With battery operation, it achieves line of sight radio communication beyond
300 m.
Besides using highly noise-resistant direct-sequence spread spectrum (DSSS) modulation, the
module has a true diversity receiver function for preventing signal dropout due to multipath fading.
This ensures highly stable and reliable radio communication in the congested 2.4. GHz ISM band.
The transceiver uses a transparent input/output interface, enabling users to use their own protocols.
In addition, the transceiver can transmit data that includes long consecutive identical bits that cannot
be transmitted with conventional radio modules.
2. Features and applications
Features








Direct sequence spectrum (DSSS)
True diversity receiving
Communication range 300 m (LOS)
Low power operation 10 mW, 3.3 V, 68 mA
Data rate 19.2 kbps
Built-in data frame coincidence detection function
Operating temperature range -20 to +65°C
Compliance with European EN300 440, American FCC Part 15.247, and Japan ARIBSTD-T-66
regulations
Applications
 Remote control of industrial equipment
 Industrial telemetry and monitoring systems
OG_STD-502-R_v09e
Circuit Design, Inc.
OPERATION GUIDE.
3. Specifications
General specifications
* All values are taken with the antenna ports terminated with 50 ohm and at 25 degree C +/- 5 degree C unless otherwise
noted
Item
Specification
Unit
Applicable standard
EN300 440-1, FCC part 15.247,
ARIB STD-T66
Communication method
Simplex
Emission type
Direct sequence spread spectrum
Modulation method
FSK
Number of channels
77ch (Ch 0 to Ch 76)
Antenna connection
RP-SMAJ
Dimensions
50 × 30 × 9 ( W x D x H )
mm
Weight
24
Remarks
RP-SMAJ and power & signal
connector pins excluded
Interface specifications
Item
Specification
Unit
Baud rate
19.2 / 38.4 / 57.6 kbps
Baud rate: 19.2 kbps (typ.), No parity
Character: 8 bits, Stop bit : 2 bits
Interface for module
setting
Input
TXD
Output
RX
L = 0 to 0.25
H = Vref - 0.4 to Vref
L = 0 to 0.25
H = Vref - 0.4 to Vref
Remarks
UART
*1
UART
*1
RX data out using a transparent
*1
method
RX data output
DO
L = 0 to 0.25
H = Vref - 0.4 to Vref
CLK for data input/output
CLK
L = 0 to 0.25
H = Vref - 0.4 to Vref
DI
L = 0 to 0.25
H = Vref - 0.4 to Vref
TX data out using a transparent
*1
method
DIV
L = 0 to 0.25
H = Vref - 0.4 to Vref
Shows on which antenna data is
*1
received.
TXRXSEL
L = 0 to 0.3
H = Vcc - 0.4 to Vcc
H: RX / L: TX
STBY
L = 0 to 0.3
H = Vcc - 0.4 to Vcc
H: Standby / L: RF operation
RST
L = 0 to 0.25
H = Vcc - 0.4 to Vcc
Reset with L for more than 100 us
3.1 - 5.5
Vref (a terminal for applying a
reference voltage consistent with
the external communication level)
TX data input
Diversity receiving
antenna
TX/RX switching terminal
RF standby terminal
Reset terminal
Communication level
reference terminal
*1
VREF
*1
" H" level depends on the voltage level applied to the communication level reference terminal.
OG_STD-502-R_v09e
Circuit Design, Inc.
OPERATION GUIDE.
Electrical specification (Common)
Item
Specification
Operating voltage
TX current
RX current
TX/RX frequency
range
Operating
temperature range
MIN
TYP
3.3
Vcc = 3.3 V
Vcc = 3.3 V
MAX
Unit
Remarks
5.5
mA
mA
at 10 mW
66
75
2402.5
2478.5
MHｚ
Refer to the frequency
table
-20°C to + 65°C
-20
65
°C
No dew condensation
Storage
temperature range
-30°C to +90°C
-30
90
°C
No dew condensation
Aging rate
< +/- 1 ppm / year
-1
ppm
TX / RX Lo frequency
Initial frequency
tolerance
+/- 10 ppm within one
year from shipment
-10
10
ppm
Transmission frequency
Oscillation type
Fractional N PLL
controlled VCO
Frequency stability
Channel spacing
+/- 10 ppm (-20 to +65°C)
1 MHz
-10
10
Reference temp. = 25 C
ppm
MHz
Data bit rate
19.2 kbps
19.2
kbps
can be changed with the
command
Chip rate
288 kcps
288
kcps
can be changed with the
command
Number of chips
M-sequence
(111101010001100)
15
bit
PLL reference
frequency
26
26
MHｚ
2.4 GHz band
TCXO : NT2520SA
Electrical specification (Transmitter)
Item
Specification
MIN
MAX
10
-10 to +55°C /all channels
Output power
TYP
-20 to +65°C /all channels
Unit
Remarks
mW
TBD
Spurious emission
TBD
dBm
EN300 440-1 compliant
Adjacent channel power
TBD
dBc
EN300 440-1 compliant
Occupied frequency
bandwidth
TBD
kHz
EN300 440-1 compliant
Actuation
time
Power on -> command reception
42
ms
Power on in the TX mode
Command reception -> TX
ms
Country code reception ->
stable RF output
Frequency change
ms
Command transmission ->
Stable RF output
RX to TX
ms
Terminal input -> Stable
operation
1.2
ms
Standby
output
Recovery from standby
OG_STD-502-R_v09e
->
stable
Circuit Design, Inc.
RF
OPERATION GUIDE.
Electrical specification (Receiver)
Item
Specification
Reception method
Maximum input level
MIN
TYP
MAX
Unit
-13
dBm
Remarks
Low IF
Receiver sensitivity
(BER, 9.6 kbps)
-20 to + 65°C /all channels
-93
dBm
error rate = < 1 %
Receiver sensitivity
(BER, 19.2 kbps)
-20 to + 65°C /all channels
-93
dBm
error rate = < 1 %
dBm
2 signal test, 1% error
Blocking
Spurious radiation
(1st Lo)
Actuation
time
EN300 440-1 compliant
-45
dBm
Power on -> County code reception
42
ms
Command reception -> RX
ms
Frequency change
ms
Command reception -> RX
start
TX to RX
ms
Terminal input -> Stable
operation
Recovery from standby
OG_STD-502-R_v09e
1.2
Power on in the RX mode
Standby -> RX start
Circuit Design, Inc.
OPERATION GUIDE.
4. Terminal specifications
Terminal
No.
Terminal
name
Input/
Output
Input/Output level (V)
Low
Hi
Output
CLK
0 to 0.25
Vref -0.4 to Vref
TX: Synchronous CLK for TX data input
RX: Synchronous CLK for RX data output
Output
0 to 0.25
Level
Translator
Level
Translator
Terminal
DIV
Data receiving
terminal
RF in
RF in/out
DIV
Input
Terminal
Vref -0.4 to Vref
This terminal shows which of the two receiving
terminals received the signal actually used for data
output. .
Internal equivalent circuit
RST
0 - 0.25
Vcc -0.4 to Vcc
The initialization terminal for coincidence detection
function*.
The internal ASIC is reset with ‘L’ level for more
than 100 μs.
Normally set this terminal to ‘H’.
Terminal
Level
Translator
* For details of the frame coincidence detection function,
refer to “Frame coincidence detection function” on page
16.
Input
0 to 0.25
Vref -0.4 to Vref
The input terminal for serial communication.
TXD
OG_STD-502-R_v09e
Terminal
Level
Translator
Settings for serial communication
Baud rate
19.2 kbps
Character bits
8 bits
Parity
none
Stop bits
2 bits
Circuit Design, Inc.
OPERATION GUIDE.
Terminal
No.
Terminal
name
Input/
Output
Output
Input/Output level (V)
Low
Hi
0 to 0.25
Vref -0.4 to Vref
The output terminal for serial communication.
RXD
DO
Baud rate
19.2 kbps
Character bits
8 bits
Parity
none
Stop bits
2 bits
DI
NC
Vref
OG_STD-502-R_v09e
Level
Translator
Terminal
Vref -0.4 to Vref
0 - 0.3
Level
Translator
Terminal
Vcc -0.4 to Vcc
0 - 0.3
Termin
Ω
Vcc -0.4 to Vcc
Sets the STD-502-R into RF-standby state.
Setting this terminal to L enables normal operation
and setting to H enables RF-standby.
RF-standby can be used to reduce the current
consumption.
Input
10
0 to 0.25
The terminal for switching the TX mode and RX
mode.
Setting this terminal to ‘L’ enables the TX mode
and setting to ‘H’ enables the RX mode.
Input
Terminal
Vref -0.4 to Vref
The TX data input terminal.
Inputs TX data in synchronization with the clock
from the TX-CLK.
Data should be set to the DI at the falling clock
edge of the TX-CLK.
Input
TXRX
SEL
0 to 0.25
The RX data output terminal.
Outputs RX data in synchronization with the clock
from the RX-CLK.
The DO data should be read at the rising clock
edge of the RX-CLK
Input
Level
Translator
Settings for serial communication
Output
Internal equivalent circuit
3.1
Termin
al
Ω
5.5
The input terminal for interface reference voltage.
Communication can be performed using the
voltage level applied to this terminal.
Circuit Design, Inc.
OPERATION GUIDE.
5. Frequency table
CH
No.
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
Channel No.
(Hex)
00
01
02
03
04
05
06
07
08
09
0A
0B
0C
0D
0E
0F
10
11
12
13
14
15
16
17
18
19
1A
1B
1C
1D
1E
1F
20
21
22
23
24
25
38
26
OG_STD-502-R_v09e
Frequency [MHz]
2402.5
2403.5
2404.5
2405.5
2406.5
2407.5
2408.5
2409.5
2410.5
2411.5
2412.5
2413.5
2414.5
2415.5
2416.5
2417.5
2418.5
2419.5
2420.5
2421.5
2422.5
2423.5
2424.5
2425.5
2426.5
2427.5
2428.5
2429.5
2430.5
2431.5
2432.5
2433.5
2434.5
2435.5
2436.5
2437.5
2438.5
2439.5
CH
No.
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
69
70
71
72
73
74
75
76
Channel No.
(Hex)
27
28
29
2A
2B
2C
2D
2E
2F
30
31
32
33
34
35
36
37
38
39
3A
3B
3C
3D
3E
3F
40
41
42
43
44
45
46
47
48
49
4A
4B
4C
Frequency [MHz]
2441.5
2442.5
2443.5
2444.5
2445.5
2446.5
2447.5
2448.5
2449.5
2450.5
2451.5
2452.5
2453.5
2454.5
2455.5
2456.5
2457.5
2458.5
2459.5
2460.5
2461.5
2462.5
2463.5
2464.5
2465.5
2466.5
2467.5
2468.5
2469.5
2470.5
2471.5
2472.5
2473.5
2474.5
2475.5
2476.5
2477.5
2478.5
2440.5
Circuit Design, Inc.
OPERATION GUIDE.
6. External dimensions
OG_STD-502-R_v09e
Circuit Design, Inc.
OPERATION GUIDE
Regulatory compliance information
Regulatory Statement for FCC
This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions:
(1) This device may not cause harmful interference, and (2) this device must accept any interference
received, including interference that may cause undesired operation.
Caution: Any changes or modifications not expressly approved by the party responsible for product
compliance could void the user's authority to operate the equipment.
Note: This equipment has been tested and found to comply with the limits for a Class B digital device,
pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against
harmful interference in a residential installation. This equipment generates, uses and can radiate radio
frequency energy and, if not installed and used in accordance with the instructions, may cause harmful
interference to radio communications. However, there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause harmful interference to radio or television reception,
which can be determined by turning the equipment off and on, the user is encouraged to try to correct the
interference by one or more of the following measures:
—Reorient or relocate the receiving antenna.
—Increase the separation between the equipment and receiver.
—Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
—Consult the dealer or an experienced radio/TV technician for help.
Labeling:
FCC ID: V9X-STD502R
The proposed FCC ID label format is to be placed on the module. If FCC ID is not visible when the
module is installed into the system, “Contains FCC ID: V9X-STD502R shall be placed on the outside of
final host system.
Caution: Exposure to radio frequency radiation
To comply with FCC RF exposure compliance requirements, a separation distance of at least 20 cm must
be maintained between the antenna of this device and all persons. This device must not be co-located or
operating in conjunction with any other antenna or transmitter, except in accordance with FCC multitransmitter product procedures.
Antenna
Only those antennas with same type and lesser gain filed under this FCC ID number can be used with
this device.
The antenna used this module is as follows;
Antenna Type & Antenna Gain;
Sleeve Antenna, 2dBi
Loop PCB Antenna, 1.89dBi
Coaxial Antenna, 1.67dBi
Instructions to OEM Integrators
The final system integrator must ensure there is no instruction provided in the user manual or customer
documentation indicating how to install or remove the transmitter module.
To comply with FCC RF exposure compliance requirements, a separation distance of at least 20 cm must
be maintained between the antenna of this device and all persons. This device must not be co-located or
operating in conjunction with any other antenna or transmitter, except in accordance with FCC multitransmitter product procedures.
OG_STD-502-R_v09e
10
Circuit Design, Inc.
OPERATION GUIDE
DoC and restrictions for CE
Hereby, Circuit Design, Inc., declares that this STD-502-R is in compliance with the essential
requirements and other relevant provisions of Directive 1999/5/EC.
This equipment is marked with the
symbol and can be used throughout the European community.
This indicates compliance with the R&TTE Directive 1999/5/EC and meets the relevant parts of following
technical specifications:
EN 300 440-2, Electromagnetic compatibility and Radio spectrum Matters (ERM);Short range devices;
Radio equipment to be used in the 1 GHz to 40 GHz frequency range; Part 2: Harmonized EN
covering the essential requirements of article 3.2 of the R&TTE Directive
EN 301 489-17, Electromagnetic Compatibility and Radio spectrum Matters (ERM); Electromagnetic
Compatibility (EMC) standard for radio equipment and services; Part 17: Specific Conditions for
Wideband Data and HYPERLAN Equipment.
EN 60950-1, Safety of Information Technology Equipment.
EN 62311, Assessment of electronic and electrical equipment related to human exposure restrictions for
electromagnetic fields (0 Hz-300 GHz).
Remark:
This module is for a portable application. The OEM integrator will need to conduct full EMC testing in
accordance with EN301 489-17 in the final use configuration.
Caution: Exposure to radio frequency radiation
This device must not be co-located or operating in conjuction with any other antenna or transmitter.
OG_STD-502-R_v09e
11
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
 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 apart 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.
OG_STD-502-R_v09e
12
Circuit Design, Inc.

---

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