Specifications

ETSI

Final draft ETSI EN 300 328 V1.8.1 (2012

04)

• Adjust the received signal level (wanted signal from the companion device) at the UUT to the value defined in

table 6 (clause 4).

NOTE 1: Testing of Unidirectional equipment does not require a link to be established with a companion device.

• The analyzer shall be set as follows:

- RBW:

Occupied Channel Bandwidth (if the analyser does not support this setting, the

highest available setting shall be used)

- VBW: 3

× RBW (if the analyser does not support this setting, the highest available setting

shall be used)

- Detector Mode: RMS

- Centre Frequency: Equal to the centre frequency of the operating channel

- Span: 0 Hz

- Sweep time: > Channel Occupancy Time of the UUT

- Trace Mode: Clear/Write

- Trigger Mode: Video

Step 2:

• Configure the UUT for normal transmissions with a sufficiently high payload to allow demonstration of

compliance of the adaptive mechanism on the channel being tested.

• Using the procedure defined in clause 5.3.7.2.1.4, it shall be verified that the UUT complies with the

maximum Channel Occupancy Time and minimum Idle Period defined in clause 4.3.2.5.1.2.

Step 3: Adding the interference signal

• A 100 % duty cycle interference signal is injected on the current operating channel of the UUT. This

interference signal shall be a band limited noise signal which has a flat power spectral density, and shall have a

bandwidth greater than the Occupied Channel Bandwidth of the UUT. The maximum ripple of this interfering

signal shall be ±1,5 dB within the Occupied Channel Bandwidth and the power spectral density (at the input of

the UUT) shall be as defined in clause 4.3.2.5.1.2.

Step 4: Verification of reaction to the interference signal

• The spectrum analyser shall be used to monitor the transmissions of the UUT on the selected operating

channel with the interfering signal injected. This may require the spectrum analyser sweep to be triggered by

the start of the interfering signal.

• Using the procedure defined in clause 5.3.7.2.1.4, it shall be verified that:

i) The UUT shall stop transmissions on the current operating channel being tested.

NOTE 2: The UUT is assumed to stop transmissions within a period equal to the maximum Channel Occupancy

Time defined in clause 4.3.2.5.1.2 step 3.

ii) Apart from Short Control Signalling Transmissions (see iii) below), there shall be no subsequent

transmissions on this operating channel for a (silent) period defined in clause 4.3.2.5.1.2 step 2. After

that, the UUT may have normal transmissions again for the duration of a single Channel Occupancy

Time period. Because the interference signal is still present, another silent period as defined in

clause 4.3.2.5.1.2 step 2 needs to be included. This sequence is repeated as long as the interfering signal

is present.

iii) The UUT may continue to have Short Control Signalling Transmissions on the operating channel while

the interference signal is present. These transmissions shall comply with the limits defined in

clause 4.3.2.5.3.2.