Radiocommunications (Unacceptable Levels of Interference – 3.4 GHz Band) Amendment Determination 2003 (No. 1) (Cth)

Radiocommunications (Unacceptable Levels of Interference – 3.4 GHz Band) Amendment Determination 2003 (No. 1)

The AUSTRALIAN COMMUNICATIONS AUTHORITY makes this Determination under subsection 145 (4) of the Radiocommunications Act 1992.

Dated     25 June 2003

A.J SHAW  Chair

R KELLEHER  Senior Executive Manager

Telecommunications

Australian Communications Authority

1.            Name of Determination

This Determination is the Radiocommunications (Unacceptable Levels of Interference – 3.4 GHz Band) Amendment Determination 2003 (No. 1).

2.          Commencement

This Determination commences on 25 June 2003.

3.          Amendment of Radiocommunications (Unacceptable Levels of Interference – 3.4 GHz Band) Determination 2000

Schedule 1 amends the Radiocommunications (Unacceptable Levels of Interference – 3.4 GHz Band) Determination 2000.

Schedule 1      Amendments

Schedule 1     Amendments

(section 3)

[1]        Schedule 2, Part 1, clause 2

substitute

2.(1)  For a group of transmitters:

(a) the device boundary of the group is to be calculated as if for a single transmitter; and

(b) when calculating the device boundary criterion (3.4 GHz), the

horizontally radiated power is calculated in accordance with subclauses (2), (2A), (3) and (4).

(2)   From 25 June 2003, where each transmitter in the group operates with a horizontally radiated power not exceeding 25 dBm/30 kHz and having an antenna with a half-power beamwidth not exceeding 25 degrees, the horizontally radiated power is taken:

(a) to be equal for each bearing F_n; and

(b) to have a value that is greater than or equal to the horizontally radiated power, in any direction, of any transmitter in the group.

(2A) Before 25 June 2003, if no two transmitters in the group transmit simultaneously for more than 5% of the time in any one hour period, the horizontally radiated power is taken:

(a) to be equal for each bearing F_n; and

(b) to have a value that is greater than or equal to the horizontally radiated power, in any direction, of any transmitter in the group.

(3)   For a group of transmitters located near a central point, if subclause (2) or (2A) does not apply, the horizontally radiated power is taken to be equal to the sum of horizontally radiated powers of each transmitter in the group for each bearing F_n.

(4)   For a group of transmitters not located near a central point, if subclause (2) or (2A) does not apply, the horizontally radiated power is taken:

(a) to be equal for each bearing F_n; and

(b) to have a value that is greater than or equal to the horizontally radiated power, in any direction, of any transmitter in the group, but never less than 52 dBm EIRP per 30 kHz.

Schedule 1      Amendments

[2]        Schedule 3, clause 4

substitute

4. Effective antenna height of a group of fixed transmitters from 25 June 2003

From 25 June 2003, for a group of fixed transmitters where the antenna height above ground of the highest transmitter (hg_max), calculated in accordance with clause 2(a), is equal to or less than 10 metres and where each transmitter in the group operates with a horizontally radiated power not exceeding 25 dBm/30 kHz and having an antenna with a half-power beamwidth not exceeding 25 degrees:

(a) the group of transmitters is to be treated as if it is a single fixed transmitter; and

(b) the effective antenna height of the group, he_m(F_n), is hg_max for any segment “m”=1 to 30 and any bearing (F_n).

[3]        After Schedule 3, clause 4

insert

4A. Effective antenna height of a group of fixed transmitters before 25 June 2003

Before 25 June 2003, for a group of fixed transmitters where the antenna height above ground of the highest transmitter (hg_max), calculated in accordance with clause 2(a), is equal to or less than 10 metres:

(a) the group of transmitters is to be treated as if it is a single fixed transmitter; and

(b) the effective antenna height of the group, he_m(F_n), is hg_max for any segment “m”=1 to 30 and any bearing (F_n).

However, if a fixed transmitter in the group transmits for more than 5% of the time in any 1 hour period, each transmitter in the group is to be treated as if it were a single fixed transmitter and the effective antenna height of each fixed transmitter is to be worked out as for a single fixed transmitter.