6.4.6 Hand-held hands-free UE receiving
26.1313GPPRelease 18RequirementsTerminal acoustic characteristics for telephonyTS
The receiving sensitivity frequency response from the SS audio input (analogue or digital input of the reference speech encoder of the SS) to the free-field shall be as follows:
The receiving sensitivity frequency response shall be within the mask which can be drawn with straight lines between the breaking points in table 14 on a logarithmic (frequency) – linear (dB sensitivity) scale.
Table 14: Hand-held hands-free receiving sensitivity/frequency mask
|
Frequency (Hz) |
Upper limit (dB) |
Lower limit (dB) |
|---|---|---|
|
315 |
6 |
|
|
630 |
6 |
-12 |
|
800 |
6 |
-6 |
|
4 000 |
6 |
-6 |
|
6 300 |
6 |
-12 |
|
8 000 |
6 |
|
|
NOTE: All sensitivity values are expressed in dB on an arbitrary scale. |
||
Figure 14: Hand-held hands-free receiving sensitivity/frequency mask
It is recommended as a performance requirement that the receiving sensitivity frequency response be within the mask which can be drawn with straight lines between the breaking points in table 14a on a logarithmic (frequency) – linear (dB sensitivity) scale.
Table 14a: Performance objective for hand-held hands-free receiving sensitivity/frequency mask
|
Frequency (Hz) |
Upper limit (dB) |
Lower limit (dB) |
|
315 |
6 |
|
|
400 |
6 |
-12 |
|
500 |
6 |
-6 |
|
4 000 |
6 |
-6 |
|
6 300 |
6 |
-12 |
|
8 000 |
6 |
|
|
NOTE: All sensitivity values are expressed in dB on an arbitrary scale |
||
Figure 14.a: Performance objective for hand-held hands-free receiving sensitivity/frequency mask
Compliance shall be checked by the relevant test described in TS 26.132.
6.4.7 Electrical interface UE sending
The sensitivity/frequency characteristics shall be as follows:
The sending sensitivity frequency response measured at the electrical reference point shall be within a mask, which can be drawn between the points given in table 14a1. The mask is drawn with straight lines between the breaking points in table 14a1 on a logarithmic (frequency) – linear (dB sensitivity) scale.
NOTE: A tilt above 1 kHz is to compensate for the mouth to microphone acoustic path when the microphone is assumed to be hanging on a headset on the side of the head.
Table 14a1: Electrical interface sending sensitivity/frequency mask
|
Frequency (Hz) |
Upper limit |
Lower limit |
|
100 |
3 |
|
|
200 |
3 |
-3 |
|
1 000 |
3 |
-3 |
|
3 000 |
10 |
0 |
|
5 000 |
12 |
0 |
|
6 300 |
12 |
0 |
|
8 000 |
12 |
|
|
NOTE: All sensitivity values are expressed in dB on an arbitrary scale. |
||
Figure 14a1: Electrical interface sending sensitivity/frequency mask
Compliance shall be checked by the relevant test described in TS 26.132.
6.4.8 Electrical interface UE receiving
The sensitivity/frequency characteristics shall be as follows:
The receiving sensitivity frequency response measured at the output of the electrical interface UE shall be within a mask, which can be drawn with straight lines between the breaking points in table 14a2 on a logarithmic (frequency) – linear (dB sensitivity) scale.
Table 14a2: Electrical interface receiving sensitivity/frequency mask
|
Frequency (Hz) |
Upper limit |
Lower limit |
|
100 |
2 |
|
|
200 |
2 |
-7 |
|
300 |
2 |
-5.5 |
|
1 000 |
2 |
–2 |
|
2 000 |
2 |
–2 |
|
5 000 |
2 |
–6 |
|
6 300 |
2 |
–12 |
|
8 000 |
2 |
|
|
NOTE: All sensitivity values are expressed in dB on an arbitrary scale. |
||
Figure 14b2: Electrical interface receiving sensitivity/frequency mask
Compliance shall be checked by the relevant test described in TS 26.132.