4.3.1 DUT positioning for Speech Mode with beside the Head Phantom
37.5443GPPConformance testingRelease 16TSUniversal Terrestrial Radio Access (UTRA) and Evolved UTRA (E-UTRA)User Equipment (UE) Over The Air (OTA) performance
The positioning specified in this clause is used for the tests cases titled as tests for Speech Mode with beside the Head Phantom. The characteristics of the Specific Anthropomorphic Mannequin (SAM) phantom are specified in Annex A.2.1.
The DUT is attached to the SAM phantom in "cheek" position as defined both by IEEE [28] and CELENEC [16] standards. The DUT performance is measured on both left and right side of the head.
Three points as shown in Figure 4.3.1-1 define the reference plane: centre of the right ear piece (RE), centre of the left ear piece (LE) and centre of mouth (M).
At first, set the DUT ready for operation.
Definition of the ‘Cheek’ position:
- Align the ear piece of the phone (see Figure 4.3.1-1) at the line RE-LE. Then, position the DUT beside the phantom so that the vertical line (see Figure 4.3.1-3) is parallel to the reference plane in Figure 4.3.1-2 and is aligned with the line M-RE on the reference plane (see Figure 4.3.1-3).
- Position the DUT so that the ear piece of the DUT touches the ear piece of the phantom head on the line RE-LE. Tilt the DUT chassis towards the cheek of the phantom having the vertical line aligned with the reference plane until any point on the front side of the DUT is in contact with the cheek or until the contact with the ear is lost.
NOTE: A holder fixture made of e.g. plastic may be used to position the handset against the phantom. An experimental study presented in [17] shows that some plastic holders might introduce an unexpectedly large effect to the measurement results. Therefore, special care must be seen when selecting such fixtures for radiated measurements.
Figure 4.3.1-1: Reference plane on head phantom, front view
Figure 4.3.1-2: Reference plane on head phantom, side view
Figure 4.3.1-3: Reference lines at a DUT
NOTE: W is the width of the chassis [28].
The characteristics of DUT positioning on head phantom in "cheek" position are specified in Table 4.3.1-1.
Table 4.3.1-1: Characteristics of DUT positioning on head phantom in “cheek” position
|
ID |
Cheek position on phantom head |
DUT chassis tilt type |
DUT chassis position |
|
0 |
Low |
Shift Down |
Up |
|
1 |
Medium |
No Shift |
Aligned |
|
2 |
High |
Shift Up |
Down |