RFS39 - Specification for Radio Apparatus: Personal Radio Service (ARCHIVED)

NOTE: This standard no longer applies. It has been superseded by the Radiocommunications (Radio Standards) Notice 2007

Specification for radio apparatus used in the personal radio service and operating on frequencies between 476.400 MHz and 477.425 MHz
 

PREAMBLE

Background

This specification has been published to facilitate the introduction of the Personal Radio Service in New Zealand. It is technically based upon the equivalent Australian Ministerial Standard 250 which covers equipment designed for use in the service other than as a repeater station.
The specification applying in New Zealand to repeater stations in the Personal Radio Service is RFS 25.

Scope

This specification (RFS 39) covers the minimum requirements for equipment operating in the Personal Radio Service with a channel spacing of 25 kHz. This specification does not include all the characteristics which may be required by a user, nor does it represent the maximum performance achievable.

Mechanical and Electrical Design

The equipment shall conform to good standards of engineering practice.
All components used in the equipment shall operate within the component manufacturers' ratings. 
 

PART 1 PRELIMINARY

Citation

1. This specification may be cited as 'RFS 39’.

Commencement

2. This specification shall come into operation on the day after its notification in the New Zealand Gazette.

Interpretation

3(1) In this specification unless the contrary intention appears--

'PRS radio' means a radiocommunications transmitter or receiver used or intended for use only in the Personal Radio Service;

'Personal Radio Service' means a two-way radiocommunication service within the mobile services used for personal radiotelephone communications over short distances within New Zealand;

'dB' means decibel;
'dBm' means decibels relative to one milliwatt;
'device' means a device to which this specification applies;

'emission' means radiation produced, or the production of radiation, by a radiocommunications transmitter;

'F3E' means an emission whose basic characteristic is that of a frequency modulated carrier on a single channel containing primarily analogue telephony information;

'G3E' means an emission whose basic characteristic is that of a phase modulated carrier on a single channel containing primarily analogue telephony information;

'Hz' means hertz;
'kHz' means kilohertz; 
'MHz' means megahertz;

'multi-role device' means a device which is or includes a radiocommunications transmitter and which is capable of operation on:

1. frequencies between 476.400 MHz and 477.425 MHz
   allocated to the Personal Radio Service and
2. any other frequencies;

'out-of-band emission' means an emission which results from the modulation process on a frequency or frequencies outside the permitted bandwidth, but excluding spurious emissions;

'permitted bandwidth' means the 16 kHz band centred on the radiocommunications transmitter operating carrier frequency;

'radiation' means the outward flow of energy from any source by means of radio transmission;

'radio transmission' has the same meaning as 'radiocommunication' in section 2 of the Radiocommunications Act 1989;

'radiocommunications transmitter' has the same meaning as 'radio apparatus' in section 2 of the Radiocommunications Act 1989;

'receiver' has the same meaning as 'radio apparatus' in
section 2 of the Radiocommunications Act 1989;

‘repeater station' means a radiocommunications receiver and transmitter established at a fixed location for the reception and retransmission of radio signals;

‘spurious emission' means an emission on a frequency or frequencies which are outside the permitted bandwidth and the level of which may be reduced without affecting the corresponding transmission of information;

'standard device' means a device which complies with this specification;

'transmitter' has the same meaning as 'radio apparatus' in section 2 of the Radiocommunications Act 1989;

'unwanted emission' means a spurious emission or an out-ofband emission;

'W' means Watts; and
'C' means degrees Celsius.
 

Devices to which this standard applies:

4.(1) Subject to sub-clause 4(2) and 4(3) this standard applies to:

• (a) PRS radios operating on frequencies between 476.400 MHz and 477.425 MHz; and
• (b) multi-role devices.

(2) This specification shall not apply to radiocommunications transmitters or receivers used or intended for use as repeater stations in the Personal Radio Service.
(3) Parts 3 and 4 of this specification shall not apply to a multi-role device in respect of its operation in services other than the Personal Radio Service.

PART 2 GENERAL

Equipment markings

5. The serial number of the equipment, the name, the type of unit, the manufacturer's name as well as any other information required to identify the equipment shall be indelibly marked on the unit in a conspicuous and/or readily accessible location, and in a manner to ensure its permanency during the expected lifetime of the equipment in its normal environment.
(Note that this section has been substantially changed from the Australian Standard MS250.)  

Adjustment Mechanisms

6. (1) For the purpose of this clause an 'adjustment mechanism'
means a mechanism which enables the operation of a standard device to be altered so that the device contravenes the requirements of this specification.

(2) Any adjustment mechanism shall be contained within the housing of a device and shall be accessible only with the use of tools such as screwdrivers and spanners.  

Conditions of operation

7. The requirements of Parts 3 and 4 shall be met by a device
when it operates at:

• (1) ambient temperatures of between 0 degrees C and
  55 degrees C inclusive; and
• (2) primary supply voltages within ±10% of that declared by
  the manufacturer.
  

PART 3 TRANSMITTER

Application

8. In this part 'transmitter' means a device which is a radiocommunications transmitter operating on frequencies between 476.400 MHz and 477.425 MHz.

Emission modes

9.(1) Subject to sub-clause 9(2), a transmitter shall be capable of
operation only in:

• (a) the G3E emission mode; or
• (b) the F3E emission mode with a nominal 6 dB per octave pre-emphasis characteristic in the audio pass band.

(2) Where the type of information to be transmitted is other than speech telephony the duration of any such transmission shall not exceed 3 seconds in any 60 second interval.

Nominal carrier frequency

10. A transmitter shall, subject to clause 11, be capable of operating only on a channel designated in the first, third or fifth column of the table set out in item 2 of the schedule, being a channel whose nominal carrier frequency is specified opposite that channel.

Frequency error

11. The carrier frequency error of a transmitter shall not exceed ±3.0 kHz.

Transients

12. Emissions from a transmitter shall be inhibited until the operating carrier frequency has stabilised within the limit specified in clause 11.

Carrier power

13. The output carrier power of a transmitter shall not exceed 5 W.

Modulation limiting

14. Under any modulation conditions the maximum frequency deviation of a transmitter shall not exceed ± 5 kHz.

Out-of-band emission suppression

15. The power of each out-of-band emission from a transmitter
shall not exceed:

• (1) 17 dBm where the frequency of the emission differs from the operating carrier frequency by greater than 8 kHz but not greater than 16 kHz;
• (2) 7 dBm where the frequency of the emission differs from the operating carrier frequency by greater than 16 kHz but not greater than 25 kHz;
• (3) -9 dBm where the frequency of the emission differs from the operating carrier frequency by greater than 25 kHz but not greater than 50 kHz;
• (4) -23 dBm where the frequency of the emission differs from the operating carrier frequency by greater than 50 kHz.
  

Spurious emissions

16. The power of each spurious emission from a transmitter shall not exceed -30dBm. 

PART 4 RECEIVER

Conducted spurious signals

17. The power of each spurious signal at the antenna terminal of a device which is a receiver shall not exceed -57 dBm.

SCHEDULE

Item 1 (removed due to inapplicability)
Item 2 NOMINAL CARRIER FREQUENCY - (Clause 10)