The measurements for Receiver Blocking are
performed at normal environmental conditions only. For non-FHSS equipment, having more
than one operating channel, the operating channels on which the testing has to be
performed are selected as follows:
- For testing blocking frequencies less
than 2400 MHz, the equipment operates on the lowest operating channel.
- For testing blocking frequencies
greater than 2500 MHz, the equipment operates on the highest operating channel.
Figure 3-2 shows the test setup for Receiver Blocking. The test results comply with the Receiver
Category-1 limits shown in the Limits on Receiver Blocking (All Categories) -
Non-FHSS Equipment table 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
Receiver Blocking measurements is described in the following steps:
- Make the test setup as shown in Test
Setup for Receiver Blocking – EN 300 328.
- Switch ON the EUT and other test
equipment.
- For test procedures, see clause
5.4.11.2.1 of EN 300 328 [3].
- Turn-Off the RF on the Blocking
Signal Generator.
- Use the Radio Testing Tool [9] to setup and configure the EUT. 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 Rx tab and select the
desired parameters such as Channel / Frequency, Data Rate, Data Pattern, and so
forth.).
- Click on “Start Rx Testing”.
- Open the Radio Testing Tool 9] and setup the link with the Companion device by using Setup tab
or use AP configuration tool to configure AP to the desired parameters (if AP is
used as companion device).
- Open the Tx tab, select the
transmission mode to “packetized”.
- Configure the Companion Device to the
same parameters such as Channel/Frequency, Data Rate, Data Pattern, Power, and so
forth) used for EUT.
- Click on “Start Tx Testing”.
- Adjust the Attenuator setting and or
Tx power of the Companion device to obtain a desired signal level (-68 dBm) at the
EUT port.
- Observe the Rx statistics on the Rx
tab of the EUT. Make sure that the PER/FER is at 0% (no errors before adding the
interferer).
- Turn ON the RF signal on the Blocking
Signal Generator, set the mode to CW, set the Frequecy as per the Limits on
Receiver Blocking (All Categories) - Non-FHSS Equipment table in CE
Regulations for SRDs Operating in License-Free 2.4 GHz/5 GHz
Bands [1] and adjust the level to >=-34 dBm at the EUT port.
- Observe the Rx statistics on the Rx
of the EUT. Measure the PER/FER and record it.
- If the PER/FER is <= 10%, then it
passed the test at that blocking frequency.
- Repeat the above steps for other
Blocking frequencies as per the Limits on Receiver Blocking (All Categories) -
Non-FHSS Equipment table in CE Regulations for SRDs Operating in
License-Free 2.4 GHz/5 GHz Bands [1] .
- The Receiver Blocking test results
comply with the Receiver Category-1 limits shown in the Limits on Receiver
Blocking (All Categories) - Non-FHSS Equipment table in CE
Regulations for SRDs Operating in License-Free 2.4 GHz/5 GHz
Bands [1] for all the test cases.