This topic guides the user through using the preconfigured LTE Clause 6 tests. With some exceptions, Test Case Manager also provides the ability to export the waveform settings for use in the appropriate Signal Studio Software.
Each software setting has a hint (setting information) associated with it. To use the hints, just click on the setting and the hint appears below the settings window.
Some fields within the setting windows are grayed out, while others are not and allow a different setting. The grayed out fields are static settings required by the standards and may change, in accordance with the standards, as active fields within the same window or the Common Settings window are changed.
While making changes, you can monitor the signal changes by viewing the graphic at the bottom of the test settings window. If there is a need to save all of the software settings, this can be done by using the Save As... function to create a state file.
Select a test.
The test shows the number of required signals. Each test signal requires its own signal generator.
If needed, expand Test Cases and any lower level collapsed nodes until the list of tests are displayed.
Select the desired test and view its parameters noting the number of signals.
Each signal requires a separate signal generator.
Setup the instruments and make the connections.
Configure the instrument(s).
Configuring the Signal Generator
If the Option setting is available and Option 2 will be selected, it is recommended that a separate signal generator is used for each interferer.
The LTE Clause 6 tests are not supported on the E4438C ESG.
Click the Common Settings node and configure the parameter.
Reselect the test selected in Step 1.
Configure the BS Configuration settings:
If the settings include Spectrum Mode and the base station is using a multi-carrier signal, use the drop-down menu to select whether it is a Multi-Carrier (Contiguous) or a Multi-Carrier (Non-Contiguous) spectrum.
Selecting a multi-carrier signal grays out the Frequency and Channel Bandwidth settings making them inactive. After being grayed out, the software makes required changes to these settings based on other settings in accordance with the 3GPP standards.
If the Frequency parameter is active, enter the carrier Frequency of the base station.
If the Channel Bandwidth field is active, use the drop-down menu to select the channel bandwidth.
If the Pout field is available, enter the base station output power.
The E-UTRA Interferer Amplitude field automatically adjusts by –30 dB from the Pout value.
When Multi-Carrier (Contiguous) or Multi-Carrier (Non-Contiguous) is selected, set the Lower Edge and Upper Edge spectrum values.
If the Option setting is available, click the setting and use the drop-down to select the option number.
The option determines whether the Macro UE UL interferer is available. The hint describes the selections.
Configure the interferer non-grayed out (active) parameters:
For a TS 36.141 compliant test signal, leave State enabled.
If there is a need to disable State, refer to the State Checkbox Behavior topic for more information.
Click the Signal Generator field and use the drop-down menu to select an instrument for the current signal.
The drop-down selection menu contains all of the instruments configured in a previous step.
If there are multiple interferers, each signal requires a separate signal generator.
Set the remaining parameters as needed or required.
Grayed out settings may change due to changes in active settings. For example, with test 6.2.8, a change to the Co-Channel E-UTRA Interferer Test Case parameter causes a change to the Amplitude, CRS Es and Ioh values for this interferer.
If a test includes AWGN, determine whether to include the AWGN by changing the status of the State checkbox.
checked means that AWGN is applied per the 3GPP standards
unchecked means no AWGN, and the test may no longer be in compliance with the 3GPP standards
If the test case is not 6.7 and there is a need to reconfigure the grayed out parameters, which causes the test to no longer be in compliance with the 3GPP standards, perform the following steps:
Enable the Override Settings by checking the box.
This causes the grayed-out parameters(inactive) to become active so they can be changed.
Modify the settings as needed.
Click the Execute button.
If there is a need to stop the signals, click the Stop button.
To restart the signals, click the Execute button, which again downloads all of the settings.