Specifications

ETSI

Final draft ETSI EN 300 328 V1.8.1 (2012

04)

• For Frame Based Equipment, 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 4.3.2.5.2.2.1.

• For Load Based equipment, 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 defined in clause 4.3.2.5.2.2.2. It shall also be verified

(if necessary by repeating the test) that the Idle Period varies between CCA and q × CCA as defined in

clause 4.3.2.5.2.2.2.

NOTE 2: For Load Based Equipment referred to in the first paragraph of clause 4.3.2.5.2.2.2 (IEEE 802.11 [i.3] or

IEEE 802.15.4 [i.5] equipment), the minimum Idle Period and the maximum Channel Occupancy Time

are as defined for other types of Load Based Equipment (see clause 4.3.2.5.2.2.2 points 2 and 3). The

CCA observation time is declared by the supplier (see clause 5.3.1 d).

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 4.3.2.5.2.2.1 step 5 (frame based equipment) or clause 4.3.2.5.2.2.2

step 5 (load based equipment).

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.

NOTE 3: The UUT is assumed to stop transmissions within a period equal to the maximum Channel Occupancy

Time defined in clauses 4.3.2.5.2.2.1 (frame based equipment) or 4.3.2.5.2.2.2 (load based equipment).

ii) Apart from Short Control Signalling Transmissions, there shall be no subsequent transmissions while the

interfering signal is present.

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

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

clause 4.3.2.5.3.2.

NOTE 4: The verification of the Short Control Signalling transmissions may require the analyser settings to be

changed (e.g. sweep time).

iv) Alternatively, the equipment may switch to a non-adaptive mode.

Step 5: Adding the blocking signal

• With the interfering signal present, a 100 % duty cycle CW signal is inserted as the blocking signal. The

frequency and the level are provided in table 6 of clause 4.3.2.10.2.

• Repeat step 4 to verify that the UUT does not resume any normal transmissions.

Step 6: Removing the interference and blocking signal

• On removal of the interference and blocking signal the UUT is allowed to start transmissions again on this

channel however this is not a requirement and therefore does not require testing.

Step 7:

• The steps 2 to 6 shall be repeated for each of the frequencies to be tested.