| Section
7 |
Radio Equipment of Convenience Radio Stations |
|
| (Radio Equipment at a Convenience Radio Station) |
| Article 54. |
Radio equipment at a convenience radio station shall comply with
the conditions in the items below according to the classifications
therein.
| 1) |
Radio equipment that uses emissions of frequencies in the
150 MHz and 400 MHz bands (except radio equipment covered in
the following item)
| a |
The communication method shall be simplex operation
or one-way communication. |
| b |
The height from the ground of a transmitting antenna
(excluding the one whose horizontal surface has directivity)
shall not exceed 30 meters. |
|
| 2) |
Radio equipment that uses emissions of frequencies in a range
of higher than 347.7 MHz to 351.9 MHz
| a |
The communication method shall be simplex operation
or one-way communication. |
| b |
The radio equipment shall be housed in a cabinet, and
the cabinet shall not be capable of being opened easily.
However, this shall not apply to power supply equipment,
transmitters, receivers and other devices announced separately
(*1) by the Minister of Public Management, Home Affairs,
Posts and Telecommunications. |
| c |
The radio equipment shall not generate emissions of
any frequencies other than those announced separately
(*2) by the Minister of Public Management, Home Affairs,
Posts and Telecommunications. |
|
| 3) |
Radio equipment that uses emissions of frequencies in the
27 MHz band
| a |
The communication method shall be one-way communication. |
| b |
The oscillation method shall be crystal oscillation. |
| c |
The radio equipment shall be contained in a cabinet
except for power supplies. |
| d |
The antenna shall be of the whip type, and its length
shall not exceed 2 meters. |
| e |
Neither a feeder nor grounding device shall be provided. |
|
| 4) |
Radio equipment that uses emissions of frequencies in the
900 MHz band
| a |
General conditions
| (1) |
The communication method shall be simplex operation. |
| (2) |
The modulation method shall be frequency modulation. |
| (3) |
The oscillation method shall be the frequency
synthesizer method that controls the oscillation
frequency by crystal oscillation. |
| (4) |
The radio equipment shall be contained in a cabinet,
and the cabinet shall not be capable of being opened
easily. However, this shall not apply to the antennas,
feeders, power supplies, transmitters, receivers,
and other devices announced separately (*1) by the
Minister of Public Management, Home Affairs, Posts
and Telecommunications. |
| (5) |
The absolute gain of the transmitting antenna
shall be 7.1 dB or less, and its horizontal directional
pattern shall be non-directional. |
| (6) |
The procedure for selecting frequencies for emissions
to be used, the procedures for transmission and
reception, and the configuration of a control signal
shall be as announced separately by the Minister
of Public Management, Home Affairs, Posts and Telecommunications. |
| (7) |
The contents of the memory which contains the
procedures for selecting frequencies for emissions
to be used and for transmission and reception shall
not be changed, and this memory shall be integral
with the processor controlled by it. |
| (8) |
The frequencies of emissions to be used (including
the channel number that indicates the frequency),
and the contents of a received control signal shall
not be displayed. |
| (9) |
The emission of any frequencies other than those
announced separately (*4) by the Minister of Public
Management, Home Affairs, Posts and Telecommunications
shall not be generated. |
| (10) |
When emission generation is started or stopped,
or every 60 seconds with emission generation continued,
only a control signal shall be sent automatically.
The communication method shall be simplex operation. |
| (11) |
When class F2D emission generation is continued
owing to the radio equipment's failure, the generation
shall be stopped automatically before the duration
of the emission reaches 60 seconds. |
|
| b |
Conditions for the transmitter
| (1) |
Transmitter which uses class F2D
emissions |
| |
(a) |
The modulation signal shall be as
follows. |
| |
|
(1) |
The coding type shall be the NRZ code. |
| |
|
(2) |
The signal transmission rate shall be 1,200 bits/s
(with a tolerance of 200/1,000,000). |
| |
|
(3) |
The MSK method shall be used for modulation, the
mark frequency shall be 1,200 Hz, and the space
frequency shall be 1,800 Hz (with a tolerance of
200/1,000,000). |
| |
(b) |
The frequency deviation shall exceed
the frequency of an unmodulated carrier by ±2.5
kHz and shall be within ±5 kHz of this frequency. |
| (2) |
Transmitter which uses class F3E emissions |
| |
(a) |
The modulation frequency shall be
3,000 Hz or less. |
| |
(b) |
The frequency deviation shall be within
±5 kHz of the frequency of an unmodulated
carrier. |
| |
(c) |
An automatic controller that prevents
frequency deviation from exceeding the value defined
in (c) shall be supported. |
| |
(d) |
A low-pass filter (limited to a low-pass
filter that provides the ratio of attenuation at
the frequencies from 3 kHz to 15 kHz to attenuation
at 1 kHz being equal to or higher than the value
determined by the expression below) shall be mounted
between the automatic controller described in (d)
and the modulator.
60log10(f/3) dB.
f indicates a frequency (in kHz) from 3 kHz to 15
kHz. |
|
|
| 5) |
Radio equipment that uses emissions of frequencies in the
50 GHz band
| a |
An automatic controller that prevents the occupied
bandwidth from exceeding the value defined in No. 6 of
Table 2 shall be installed. |
| b |
The radio equipment shall be contained in a cabinet
that shall not be capable of being opened easily, except
for antennas, feeders, power supplies, and accessories. |
| c |
Only power supply switches, selectors for transmission
or reception, emission type selectors, frequency selectors,
and indicator selectors shall be used as switches external
to the transmitter. |
| d |
The transmitting antenna shall provide an absolute gain
of 45 dB or less. |
|
|
| 2 |
Radio equipment that uses the real number zero-point single-sideband
modulation method shall comply with the conditions in the items
below in addition to the conditions prescribed in items 1) and
2) of the preceding paragraph.
| 1) |
The channel interval shall be 6.25 kHz. |
| 2) |
The adjacent channel leakage power shall be such that,
in the case of modulation using a 1,700 Hz sine wave with
the antenna power set at 80% of the rated output, the
mean value of the power radiated into the ±1.7 kHz
band of the frequency 6.25 kHz distant from the frequency
to be transmitted shall be lower than the mean power by
45 dB or more. |
|
| 3 |
Radio equipment that uses the narrow-band digital communication
method shall comply with the conditions in the items below in
addition to the conditions prescribed in items 1) and 2) of
paragraph 1.
| 1) |
The modulation method shall refer to 4 value digital
modulation (which refers to  /4
shift 4PSK or offset 4PSK; this also applies hereafter
in this paragraph and in Article 57.3.2), or 16 value
digital modulation (which refers to 16QAM or multi-subcarrier
16QAM; this also applies hereafter in this paragraph
and in Article 57.3.2). |
| 2) |
The channel interval shall be 6.25 kHz. |
| 3) |
The adjacent channel leakage power shall comply with
the conditions in the items below in the case of modulation
using a standard coding test signal with the same transmission
rate as that of the modulation signal:
| a |
In the case of radio equipment which uses 4 value
digital modulation, the power radiated into the
±R band (R shall be 1/4 of the transmission
rate of the modulation signal) of the frequency
6.25 kHz distant from the carrier frequency shall
be lower than the carrier power by 45 dB or more. |
| b |
In the case of radio equipment which uses 16 value
digital modulation, the power radiated into the
±R band (R shall be 1/8 of the transmission
rate of the modulation signal) of the frequency
6.25 kHz distant from the carrier frequency shall
be lower than the carrier power by 45 dB or more.
|
|
|
|
| Section
7.2 |
Radio Equipment of Citizen Radio Stations |
|
| (Radio Equipment at a Citizen Radio Station) |
| Article 54.2. |
Radio equipment at a citizen radio station shall comply with the
conditions defined in the items below:
| 1) |
The communication method shall be simplex operation. |
| 2) |
The transmitter shall oscillate by the crystal oscillation
method. |
| 3) |
Radio equipment shall be contained in a cabinet that shall
not be capable of being opened easily, except for power supplies,
transmitters, and receivers. |
| 4) |
The external transmitter and receiver shall be connected via
a cord whose length does not exceed 2 meters. |
| 5) |
The transmitting antenna shall be of the whip type, and its
length shall not exceed 2 meters. |
| 6) |
Neither a feeder nor grounding device shall be supported. |
| 7) |
No modulation frequency shall be oscillated.
|
|
| Section
7.2.2 |
Radio Equipment of Small-Scale Earth Stations
Whose Transmission Is Controlled by Another Earth Station |
|
| (Radio Equipment at a Small-Scale Earth Station Whose
Transmission Is Controlled by Another Earth Station) |
| Article 54.3. |
Radio equipment constituting a communication system along with one
of two or more earth stations opened on the ground (which are mobile
stations and operate only when they are stopped) that controls transmission
(hereinafter referred to as "control earth station" in this
Article), having a transmitting antenna whose absolute gain is 50
dB or less, transmitting emissions of frequencies in a range of higher
than 14.0 GHz to 14.4 GHz, and receiving emissions of frequencies
in a range of higher than 12.44 GHz to 12.75 GHz shall comply with
the conditions defined in the items below:
| 1) |
The cabinet for a transmitter/receiver shall not be capable
of being opened easily. |
| 2) |
The modulation method shall be frequency modulation or phase
modulation. |
| 3) |
The degree of cross polarized wave identification shall be
27 dB or more. |
| 4) |
The electric power per 40 kHz bandwidth radiated from a transmitting
antenna shall comply with the values prescribed in the right-hand
column of the table below according to the classification in
the left-hand column of the table. |
|
Elongation from the direction of principal radiation ( ) |
Maximum radiation power (with 1 W regarded as 0 dB) |
| 2.5 degrees to fewer than 7 degrees |
Equal to or lower than the value obtained by the following
expression:33 - 25log10
dB |
| 7 degrees to fewer than 9.2 degrees |
12 dB or less |
| 9.2 degrees to fewer than 48 degrees |
Equal to or lower than the value obtained by the following
expression:36 - 25log10
dB |
| 48 degrees to 180 degrees |
-6 dB or less |
|
| |
| 5) |
A function for automatically suspending emission when the
oscillation circuit for a transmitter is out of order shall
be supported. |
| 6) |
A function for enabling the start of transmission only when
a control signal from the control earth station via a satellite
station is received shall be supported.
|
|
| Section
7.3 |
Radio Equipment of Radio Stations Using
Amplitude Modulation Emissions |
|
| (Carrier Frequency) |
| Article 55. |
A single-channel radio telephone using a single sideband of 28 MHz
or below (excluding radio telephones at radio stations in the maritime
mobile service, aeronautical mobile service, and maritime radionavigation
service and those at broadcasting stations) shall provide the carrier
frequency that is lower than the frequency assigned to the radio telephone
by 1.5 kHz (by 3.75 kHz for a radio telephone at a fixed station for
broadcast relay).
|
| (Conditions for the transmitter) |
| Article 56. |
The transmitter at a radio station that uses class H3E, J3E, or
R3E emissions of 28 MHz or below shall comply with the conditions
defined in the table below, except for transmitters at radio stations
in the aeronautical mobile service, broadcasting stations, fixed stations
for broadcast relay, and amateur radio stations.
|
| Classification |
Condition |
| Carrier power |
For class R3E emissions, a value lower than the mean power
modulated in the saturated level by a modulation frequency by
18 dB ±2 dB. For class J3E emissions, a value lower than
this mean power by 40 dB or more |
| Sideband |
Upper sideband |
| Output impedance |
75  wherever
possible (except for ship stations and transmitters which output
an antenna power of 1 W or less) |
| Tone frequency (except for transmitters provided for in Article
40.7 paragraphs 1 and 2) |
1,500 Hz wherever possible |
| Overall frequency response characteristics (modulation frequencies
from 350 Hz to 2,700 Hz) |
6 dB or less (except for transmitters which output an antenna
power of 1 W or less) |
| Overall distortion and noise |
When the reference input level modulated by a frequency of
1,000 Hz is added, the ratio of total equipment output to unwanted
elements contained in it shall be 20 dB or more (except for
transmitters using class H3E emissions or outputting an antenna
power of 1 W or less) |
|
| 2 |
The transmitter listed in the previous paragraph and used
for the maritime mobile service shall also comply with the conditions
defined in the items below:
| 1) |
The frequency modulation accompanying a carrier shall
be as low as possible. |
| 2) |
The attenuation of unwanted emissions at each frequency
in all the peak envelope power supplied over a feeder
shall be as shown in the right-hand column of the table
below according to the classification in the left-hand
column of the table.
|
|
|
| Interval between the frequencies of unwanted
emissions and the assigned frequency |
Attenuation |
| Higher than 1.5 kHz to 4.5 kHz |
31 dB or more |
| Higher than 4.5 kHz to 7.5 kHz |
38 dB or more |
| Higher than 7.5 kHz |
43 dB or more. The peak envelope power of unwanted
emissions shall be, however, 50 mW or less. |
|
| |
| 3) |
A transmitter equipped with a selective calling device
shall be capable of transmitting a carrier together with
a selective calling signal. |
|
|
| (Conditions for the Receiver) |
| Article 57. |
The receiver at a radio station in the maritime mobile service that
uses class J3E emissions of 28 MHz or below shall comply with the
conditions prescribed in the right-hand column of the table below
according to the classification in the left-hand column of the table,
except for the receiver at a radio station that uses transmitting
equipment providing an antenna power of 1 W or less.
|
| Classification |
Condition |
| Sensitivity |
The receiver input voltage required for making
the ratio of half the receiver's rated output to unwanted elements
contained in it be 20 dB shall be 3 µV or less with
a modulation frequency of 1,000 Hz (except for the receivers
provided for in Article 40.7 paragraphs 1 and 2). |
| One-signal selectivity |
Passing bandwidth |
The bandwidth of a 6 dB reduction shall be in
a range of higher than 2.4 kHz to 3 kHz wherever possible. |
| Attenuation |
The bandwidth of a 26 dB reduction shall be within
±1.7 kHz.
The bandwidth of a 46 dB reduction shall be within ±1.9
kHz.
The bandwidth of a 66 dB reduction shall be within ±2.1
kHz. |
| Spurious response |
40 dB or more |
| Effective selectivity |
The desensitization effect shall be such that
the disturbing wave input voltage that suppresses the output
of a desired signal by 3 dB is 10 mV or more when the disturbing
wave distant by 4 kHz or more (3 kHz or more for a radio station
in the maritime mobile service that uses emissions in a range
of higher than 1,606.5 kHz to 26,175 kHz) from the desired signal
is applied with a modulated desired input voltage of 10 µV
applied. |
| Local oscillator |
| 1) |
Frequency variations per hour shall be within ±20
Hz for 13 MHz or below, and within ±50 Hz for higher
than 13 MHz. |
| 2) |
In addition to satisfying the condition in 1), the receiver
at a ship station that is not used together with a transmitter
shall be capable of being adjusted so that a desired signal
may be received at a frequency difference of 50 Hz or
less. |
|
| Overall distortion and noise |
When a receiver input voltage of 30 µV
modulated at a frequency of 1,000 Hz is applied, the ratio of
half the rated output to the unwanted elements contained in
it shall be 20 dB or more. |
|
| 2 |
The receiver listed in the previous paragraph that is equipped
with a selective calling device shall be able to receive a selective
calling signal with no carrier added.
|
|
| (Technical Conditions for Radio Equipment at a Radio
Station in the Maritime Mobile Service Used for Facsimile Transmission) |
| Article 57.2. |
The radio equipment at a radio station in the maritime mobile service
that uses class J2C or J3C emissions of 28 MHz or below shall comply
with the technical conditions announced separately (*) as well as
the conditions defined in Articles 56 and 57.
(Announcement: *1 in No. 736 in 1985)
|
| (Radio Equipment at a Radio Station of Real Number Zero-Point
Single-Sideband Modulation Method) |
| Article 57.2.2. |
The radio equipment at a radio station of the real number zero-point
single-sideband modulation method which uses emissions of a frequency
in a range of higher than 142 MHz to 170 MHz or higher than 335.4
MHz to 470 MHz shall comply with the conditions in the items below.
However, this shall not apply to the radio equipment at coast stations,
aeronautical stations, amateur radio stations, and convenience radio
stations.
| 1) |
The channel interval shall be as follows:
| a |
The channel interval of a single-sideband shall be
6.25 kHz. |
| b |
The channel interval of a frequency band other than
a single-sideband shall be 12.5 kHz. |
|
| 2) |
The adjacent channel leakage power shall comply with the conditions
in the items below in the case of modulation using a 1,700 Hz
sine wave with the antenna power set at 80% of the rated output:
| a |
In the case of radio equipment with the channel interval
of 6.25 kHz, the power radiated into the ±1.7 kHz
band of the frequency 6.25 kHz distant from the frequency
to be transmitted shall be lower than the mean power by
55 dB or more or 32 µW or less. |
| b |
In the case of radio equipment with the channel interval
of 12.5 kHz, the power radiated into the ±3.4 kHz
band of the frequency 12.5 kHz distant from the frequency
to be transmitted shall be lower than the mean power by
55 dB or more or 32 µW or less. |
|
|
| 2 |
In the case of radio equipment which radiates emissions of
a frequency automatically selected by receiving emissions from
a land station which is the other party of the communication,
the communication method shall be duplex operation or dusimplex
operation. |
| 3 |
The radio equipment which has a function to automatically
correct a transmission frequency (hereafter referred to as "frequency
tracking function") shall comply with the frequency obtained
by receiving emissions from a land station which is the other
party of the communication (hereafter referred to as a "reference
station") in addition to the conditions in the preceding
paragraph.
(Announcements: *1 in No. 408 in 1994, *2 in
No. 409 in 1994, *3 in No. 806 in 1982, and *4 in No. 512 in
1993)
|
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