4 General

11.263GPPBase Station System (BSS) equipment specificationPart 4: RepeatersRelease 1997TS

A repeater can be designed to amplify the whole transmit RF band or just a part of the band. In the latter case the repeater can be either Broadband, with frequency band selective filtering, or channelized, with channel selective filtering.

4.1 Radio frequency bands

A repeater, as a bi-directional amplifier, can amplify and transmit a received MS signal in the MS transmit band, simultaneously it can amplify and transmit a received BTS signal in the BTS transmit band. The relevant MS and BTS transmit bands, as defined in GSM 05.05 [6], are given in table 1.

Table 1: MS and BTS transmit RF bands

MS transmit band

BTS transmit band

P-GSM 900

890 – 915 MHz

935 – 960 MHz

E-GSM 900

880 – 915 MHz

925 – 960 MHz

DCS 1800

1710 – 1785 MHz

1805 – 1880 MHz

R-GSM 900

876 – 915 MHz

921 – 960 MHz

NOTE: In some circumstances, for instance when an operator (or more than one operator who co-ordinate the use of repeaters), is not allocated a complete band as defined in table 1, it may be necessary to restrict the frequency range of operations of repeaters. In these circumstances, the test of "Gain outside operating band" in annex A may be used to verify the performance of the repeater.

4.2 Test environments

For each test in this ETS, the environmental conditions under which the repeater is to be tested are defined.

4.2.1 Normal test environment

When a normal test environment is specified for a test, the test should be performed under any combination of conditions between the minimum and maximum limits stated in table 2.

Table 2: Limits of conditions for Normal Test Environment

Condition

Minimum

Maximum

Barometric pressure

86 kPa

106 kPa

Temperature

15 ºC

30 ºC

Relative Humidity

20 %

85 %

Power supply

Nominal, as declared by the manufacturer

Vibration

Negligible

The ranges of barometric pressure, temperature and humidity represent the maximum variation expected in the uncontrolled environment of a test laboratory. If it is not possible to maintain these parameters within the specified limits, the actual values shall be recorded in the test report.

NOTE: This may, for instance, be the case for measurements of radiated emissions performed on an open field test site.

4.2.2 Extreme test environment

The manufacturer shall declare one of the following:

a) The equipment class for the equipment under test, as defined in ETS 300 019‑1‑3 [3].

b) The equipment class for the equipment under test, as defined in ETS 300 019‑1‑4 [4].

c) For equipment that does not comply to an ETS 300 019‑1 [2] class, the relevant classes from IEC 721 [8] documentation for temperature, humidity and vibration shall be declared.

NOTE: Reduced functionality for conditions that fall out side of the standard operational conditions are not tested in this ETS. These may be stated and tested separately.

4.2.3 Extreme temperature

When an extreme temperature test environment is specified for a test, the test shall be performed at the standard minimum and maximum operating temperatures defined by the manufacturer’s declaration for the equipment under test.

Minimum temperature:

The test shall be performed with the environmental test equipment and methods of inducing the required environmental phenomena into the equipment, conforming to the test procedure of IEC 68‑2‑1 [7]. The equipment shall be maintained at the stabilized condition for the duration of the test sequence.

Maximum temperature:

The test shall be performed with the environmental test equipment and methods of inducing the required environmental phenomena into the equipment, conforming to the test procedure of IEC 68‑2‑2 [7]. The equipment shall be maintained at the stabilized condition for the duration of the test sequence.

NOTE: It is recommended that the equipment is made fully operational prior to the equipment being taken to its lower operating temperature.

4.3 Manufacturers declarations

The manufacturer shall declare:

a) the operating band or bands of the repeater;

b) the maximum rated output power per channel;

c) the number of channels supported by the repeater.

4.4 Methods of measurement

The general methods of measurement and measurement uncertainty shall be according to ETR 027 [11] and ETR 028 [12] except where they conflict with this specification.