The measurements for Dynamic Frequency
Selection (DFS) are performed at normal operating conditions only. The EUT is configured
to the highest sated transmit output power level and is tested on those channels and
channel bandwidths specified in table 6. Figure 4-3 shows the test setup for DFS. The test results comply with the requirements and
limits shown in the DFS Requirements and their Applicability and Limits on DFS
Requirements tables in CE Regulations for SRDs Operating in
License-Free 2.4 GHz/5 GHz Bands [1] and are recorded in the test report. The test procedure for DFS
measurements is described in the following steps:
- Make the test setup as shown in Figure 4-3.
- Switch ON the EUT and other test
equipment.
- For detailed test procedure, see
clause 5.4.8.2 of EN 301 893 [4].
- Use the Radio Testing Tool [9] to setup and configure the EUT and the Companion device. For
setting and up configuring the EUT, see the Radio Testing Tool User's Guide [10].
- Open the Radio Testing Tool [9] and setup the link with the EUT by using the Setup tab.
- Open the Tx tab and select the
transmission mode to “packetized”.
- Configure the EUT to the desired
parameters such as Channel/Frequency, Data Rate, Data Pattern, Power, and so
forth).
- Click on “Start Tx Testing”.
- Open the Radio Testing Tool [9] and setup the link with the Companion device by using the Setup
tab.
- Open the Rx tab and configure the
Companion Device to the same parameters such as Channel/Frequency, Data Rate, Data
Pattern, and so forth) used for EUT
- Click on “Start Rx Testing”.
- Observe the Rx statistics on the Rx
tab of the Companion device. Make sure that the PER/FER is at 0%. If it requires
adjust the Attenuator value in the test setup.
- Carry out the tests (Channel
Shutdown) as per clause 5.4.8.2.1.6 of EN 301 893 [4] measurement procedure.
- Repeat the above for other data
rates/modulations and also other desired channels.
- The DFS test results comply with the
limits shown in the Limits on DFS Requirements table in CE
Regulations for SRDs Operating in License-Free 2.4 GHz/5 GHz
Bands [1] for all the test cases.