A.2.4 Parameters for embedded devices

37.5443GPPConformance testingRelease 16TSUniversal Terrestrial Radio Access (UTRA) and Evolved UTRA (E-UTRA)User Equipment (UE) Over The Air (OTA) performance

Tools: ARFCN - Frequency Conversion for 5G NR/LTE/UMTS/GSM

A.2.4.1 General

The main objectives of this section are to define basic parameters required when performing TRP and TRS measurements on notebooks and tablets.

A.2.4.2 Notebook

A notebook PC is a portable personal computer combining the computer, keyboard and display in one form factor. Typically the keyboard is built into the base and the display is hinged along the back edge of the base. The largest single dimension for a notebook is limited to 0.42 m.

As notebooks are not body worn equipment nor recommended for use placed directly on the lap, the notebook shall be tested in a free space configuration without head and hand phantoms.

When the notebook is placed in a measurement chamber the display shall be configured according to Table A.2.4.2-1.

Table A.2.4.2-1: Display Settings

Parameter	Value	Note
Display lid angle	110 +/- 5 degrees	The lid angle is defined as the angle between the front of the display to the levelled base.
LCD Backlight	50%
Ambient sensor	Disabled

A typical notebook PC is equipped with several radio access technologies. During the measurement the DUT shall be configured according to Table A.2.4.2-2.

Table A.2.4.2-2: Embedded radio transmitters

Parameter	Value	Note
WWAN	Enabled	This is the DUT transceiver
Other transceivers	Disabled	UWB, WLAN, Bluetooth™

The notebook power management shall be configured according to Table A.2.4.2-3.

Table A.2.4.2-3: Power management

Parameter	Value	Note
Screensaver	Disabled
Turn OFF display	Never
Turn OFF Hard drive	Never
System Hibernate	Never
System Standby	Never
Dynamic control of clock frequencies	Disabled
Power source	Standard battery

If the notebook is equipped with retractable antennas the device shall be tested with the antennas in a configuration recommended by the manufactures.

A.2.4.3 Tablet

A tablet is a portable personal computer combining the computer and display in a single form factor. User input is accomplished via touch screen or a pen. The largest single dimension (i.e., length, width, height) for a tablet is limited to 0.42 m. Tablet devices may have different primary mechanical modes.

Tablet shall be tested in a free space configuration without head and hand phantoms. If hand phantom grips become available for tablets, the testing configuration for tablets may be revisited. The centre of rotation shall be the three-dimensional geometric centre of the EUT, display facing free space.

When a tablet is placed in a measurement chamber the display shall be configured according to Table A.2.4.3-1.

Table A.2.4.3-1: Display Settings

Parameter	Value	Note
LCD Backlight	50%
Ambient light sensor	Disabled

A typical tablet is equipped with several radio access technologies. During the measurement the EUT shall be configured according to Table A.2.4.2-2.

EUT shall be powered by battery and power management settings in Table A.2.4.2-3 shall be used.

If a fixture is required to mount the EUT to the positioning system, the EUT holding fixture shall be made of a material with a dielectric constant of less than 5.0, and loss tangent less than 0.05. The fixture shall not extend beyond the footprint of the EUT by more than 20 mm and shall be no more than 20 mm in thickness. It is recommended, but not required, that a Styrofoam spacer would be used between the holding fixture and the EUT.