7.9 Spurious emissions from the receiver antenna connector
3GPP51.021Base Station System (BSS) equipment specificationRadio aspectsRelease 17TS
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 7.9-1. 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. In case of multicarrier BTS with multicarrier receiver, RMS detector mode shall be enabled instead.
The power shall be measured over the frequency ranges specified in table 7.9-1.
Table 7.9-1: 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 ‑ 1 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 |
|
|
1 GHz – 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/ 1 MHz(NOTE) |
|
|
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 |
|
|
NOTE: 1 MHz measurement bandwidth applies only to BTS belonging to a multicarrier BTS class equipped with multicarrier receiver. |
||
7.9.3 Void
7.9.4 Conformance requirement
Test Environment:
Normal.
Minimum Requirement
The measured power shall not exceed:
‑57 dBm for all frequencies up to 1 GHz.
‑47 dBm for all frequencies above 1 GHz.
7.9.5 Requirement Reference
3GPP TS 45.005 subclause 5.4.