7.9 Spurious emissions from the receiver antenna connector

11.213GPPBase Station System (BSS) equipment specificationRadio aspectsRelease 1999TS

7.9.1 Test Purpose

Spurious emissions are emissions at frequencies other than those of the BTS transmitter ARFCNs and adjacent frequencies. This test measures spurious emissions from the BTS receiver antenna connector.

7.9.2 Test Case

The transmitter shall be configured with one TRX active. It shall be allocated to RF Channel M and shall transmit at full power on all time slots.

For a BTS equipped with diversity, the requirements of this subclause apply to each receiver dedicated antenna connector.

For a BTS equipped with a duplexer or duplexers, the requirements of subclause 6.6 apply to any antenna connector which is a port for both transmitter(s) and receiver(s). Therefore, this test need not be performed on these ports.

The receiver antenna connector shall be connected to a spectrum analyser or selective voltmeter with the same characteristic impedance.

The detecting device shall be configured as defined in table 26. Peak hold shall be enabled, and the video bandwidth shall be approximately three times the resolution bandwidth. If this bandwidth is not available on the detecting device, it shall be the maximum available, and at least 1 MHz.

The power shall be measured over the frequency ranges specified in table 26.

7.9.3 Essential conformance

Test Environment:

Normal.

Table 26: measurement conditions for Conducted Emissions from the
Receiver Antenna Connector

Frequency Band

Frequency offset

Resolution Bandwidth

100 kHz ‑ 50 MHz

10 kHz

50 MHz ‑ 500 MHz and outside the

relevant transmit band

(offset from the edge of the relevant transmit band)

 2 MHz

30 kHz

 5 MHz

100 kHz

500 MHz ‑ 12.75 GHz

and outside the relevant transmit band

(offset from the edge of the relevant transmit band)

2 MHz

30 kHz

5 MHz

100 kHz

10 MHz

300 kHz

20 MHz

1 MHz

30 MHz

3 MHz

Inside the relevant transmit band

(offset from the transmit carrier frequency)

1.8 MHz

30 kHz

6 MHz

100 kHz

Conformance Requirement

The measured power shall not exceed:

‑57 dBm for all frequencies up to 1 GHz.

‑47 dBm for all frequencies above 1 GHz.

7.9.4 Complete conformance

The requirements of essential conformance shall apply.

7.9.5 Requirement Reference

GSM 05.05 (ETS 300 910) [7] subclause 5.4.