 |
| Overview of
Japanese radio regulations concerning license exempt low power
radios |
This is a brief overview of the regulatory
information concerning license exemptions for low power radio
related to Circuit Design's radio modules.
The following two categories represent the major license exempt low
power radio categories.
Radio equipment operating with extremely
low power of emission
Radio equipment that emit very low power. They are excluded from the
category that requires Technical Regulations Conformity
Certification, but they are very low power equipment.
Specified low-power radio equipment
To use radio with higher output power, there are several categories
of license exempt low power radio, but they require Technical
Regulations Conformity Certification. Specified low-power radio
equipment is the category that fits most of Circuit Design's radio
modules. It allows emissions up to 10 mW.
|
| Radio equipment operating with
extremely low power of emission |
This is the category for which there is no need for
Technical Regulations Conformity Certification. Only the maximum
field strength is specified as shown below.
Typical products used in this category are vehicle keyless entry
systems that have operating ranges of only a few meters. Maximum
field strength allowed in this category is very low compared with
the RF power allowed by FCC part 15 or European regulation. The
practical operation range achievable with such low power is very
limited.
→Circuit Design’s products under this category・
CDC-TX-02 / CDC-RX-02 CDC-TR-01
/ CDC-TR-02 |
|
|
| Specified low power radio
equipment |
This is the part where 1-10 mW of maximum RF power
is allowed.
Generally, it requires the fulfilment of all of the following
conditions.
(1) Antenna power of 0.01 watts or less.
(2) Use of radio type and frequency as specified in the ministerial
ordinance of the Ministry of Internal Affairs and Communications.
(3) No disturbance of the operations of other radio equipment
(4) Only uses radio equipment with the Technical Regulations
Conformity Certification.
Among the many kinds of equipment for specified low power radio
equipment, Circuit Design's radio modules are best suited to
“Telemeter, Telecontrol and Data Transmission Radio equipment”. The
following table summarizes the specifications of the ARIB standards
specified for Telemeter, Telecontrol and Data Transmission Radio
equipment.
Telemeter, Telecontrol and Data Transmission Radio Equipment for
Specified
Low Power Radio equipment (315 MHz band/ 400 MHz band / 1200 MHz
band)
|
|
ARIB STD-T93 315 MHz band |
| Communication
method |
Operating
Frequency Band (MHz) |
Antenna power (e.i.r.p) |
Transmission time
restriction |
Main application |
One
way,
Simplex,
Broadcast,
Semi-duplex,
Duplex |
312-315.05 |
250 uW or less |
Yes |
Tire
pressure monitoring, Keyless entry etc. |
| 315.05-315.25 |
25 uW or less |
|
|
ARIB STD-T67 400 MHz band |
| Communication method |
Operating Frequency Band (MHz) |
CH step (kHz) |
Antenna power (mW) |
Transmission time restriction |
| One way, Simplex
or Broadcast |
426.0250-426.1375 |
12.5 |
1 mW or less |
Yes |
| 426.0375-426.1125 |
25 |
Yes |
| 429.1750-429.2375 |
12.5 |
10 mW or less |
Yes |
| 429.2500-429.7375 |
12.5 |
No |
| One way, Simplex,
|
429.8125-429.250 |
12.5 |
Yes |
| 449.7125-449.8250 |
12.5 |
Yes |
Broadcast,
Semi-duplex,
Duplex |
449.8375-449.8875 |
12.5 |
Yes |
| 469.4375-469.4875 |
12.5 |
Yes |
|
|
ARIB STD-T67 1200 MHz band |
| Communication method |
Operating Frequency Band (MHz) |
CH step (kHz) |
Antenna power (mW) |
Transmission time restriction |
One way,
Simplex,
Broadcast,
Semi-duplex,
Duplex |
1216.000-1217.000 |
50 |
10 mW or less |
Yes/No* |
| 1252.000-1253.000 |
50 |
| 1216.0125-1216.9875 |
25 |
| 1252.0125-1252.9875 |
25 |
|
| *Not all bands allow continuous transmission. Some
ranges of the bands have duty cycle restrictions |
| |
| Other low power radio equipment
requiring no license (Not all listed) |
|
Radio station |
Frequency band |
ARIB standard |
|
Specified low power radio station |
Telemeter/Telecontrol |
400/1200 MHz |
STD-T67 |
| 315 MHz |
STD-T93 |
| Medical telemeter |
400 MHz |
STD-21 |
| Radio pager |
400 MHz |
STD-19 |
| Radio microphone |
806 MHz |
STD-15 |
| Low
power security |
400 MHz |
STD-30 |
| Low
power data transmission |
2.4 GHz |
STD-33/STD-T66 |
|
For more information about Japanese radio regulations and the
Technical Regulations Conformity Certification system, please refer
to information on the
MIC website or consult with the following
certification bodies.
|
| Registered Certification Bodies
in Japan (As of
August 2008) |
|
|
| |
| Registered foreign conformity
assessment body under Mutual Recognition Agreement (MRA) (as of
August 2008) |
| MIC has been promoting mutual recognition of
approval for radio equipment and telecommunications terminal
equipment. The following bodies have been registered as a registered
foreign conformity assessment body; |
TELEFICATION B.V
Address : Edisonstraat 12A,
6902 PK Zevenaar, The Netherlands |
BABT
Address : Churchfield Road,
Walton-on-Thames, Surrey KT12 2TD, United Kingdom |
Phoenix Testlab GmbH
Address : Konigswinkel 10,
32825 Blomberg, Germany |
CETECOM ICT Services GmbH
Address : Untertürkheimer Str. 6-10, 66117 Saarbrücken, Germany |
KTL
Address : Saxon Way, Priory Park West, Hull, HU 13 9PB, United Kingdom |
EMCCert Dr. Rasek GmbH
Address : Boelwiese 5, 91320 Ebermannstadt, Germany |
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