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683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.3.5 Test requirement | The receiving sensitivity/frequency response shall be within the mask given by table 30.2. The mask can be drawn with straight lines between the breaking points in the following table on a logarithmic (frequency) vs linear (dB sensitivity) scale.
All sensitivity levels are dB on an arbitrary scale.
Table 30.2
Frequency... |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.4 Receiving loudness rating | |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.4.1 Definition | The Receiving Loudness Rating (RLR) is a means of expressing the receiving frequency response based on objective measurements in a way which relates to how a speech signal would be perceived by a listener. |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.4.2 Conformance requirement | 1) The nominal Receiving Loudness Rating (RLR) shall be 2 ± 3 dB.
If a user controlled receive volume control is provided the equipment shall meet this nominal value for at least one setting of the control.
3GPP TS 03.50; subclause 3.1.1.
2) If a user controlled receive volume control is provided the Receive Loudness R... |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.4.3 Test purpose | 1) To verify that the nominal Receiving Loudness Rating (RLR) is 2 ± 3 dB.
2) To verify that if a user controlled receive volume control is provided the Receive Loudness Rating (RLR) is not less than ‑13 dB when the control is set to maximum. |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.4.4 Method of test | |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.4.4.1 Initial conditions | When measured at the DAI:
- The DAI of the MS is connected to the SS and is set to the operating mode "Test of acoustic devices and A/D & D/A".
When measured at the output of the reference speech decoder of the SS:
- A full rate speech call is set up between the MS and the SS. |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.4.4.2 Procedure | When measured at the DAI:
a) The receiving sensitivity is measured at each of the 14 frequencies listed in table 2 of ITU-T Recommendation P.79, bands 4 to 17.
b) The sensitivity is expressed in terms of dBPa/V and the RLR is calculated according to ITU-T Recommendation P.79 formula 4.19 c, over bands 4 to 17, using th... |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.4.5 Test requirement | If no user controlled receive volume control is provided, the RLR shall be 2 ± 3 dB.
If a user controlled receive volume control is provided, the RLR shall meet this nominal value for (at least) one setting of the receive volume control.
When the receive volume control is set to maximum the RLR shall not be less than (... |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.5 Side tones | |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.5.1 Side Tone Masking Rating (STMR) | |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.5.1.1 Definition | The sidetone loudness ratings are a means of expressing the path loss from the artificial mouth to the artificial ear based on objective single tone measurements in a way that relates to how a speaker will perceive his own voice when speaking (talker sidetone, expressed by the sidetone masking rating - STMR), or how a ... |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.5.1.2 Conformance requirement | The nominal value of the Side Tone Masking Rating (STMR) shall be 13 ± 5 dB. Where a user controlled receiving volume control is provided the STMR shall meet the requirement at the setting where the RLR is equal to the nominal value.
3GPP TS 03.50; subclause 3.10.1. |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.5.1.3 Test purpose | 1) To verify that the Side Tone Masking Rating (STMR) is 13 ± 5 dB.
2) To verify that is a user controlled receiving volume control is provided, the STMR is 13 ± 5 dB at the setting where the RLR is equal to the nominal value. |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.5.1.4 Method of test | |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.5.1.4.1 Initial conditions | a) The DAI of the MS is connected to the SS and is set to the operating mode "Test of acoustic devices and A/D & D/A".
b) The handset is mounted in the LRGP (see annex 1 of ITU-T Recommendation P.76) and the earpiece is sealed to the knife-edge of the artificial ear conforming to ITU-T Recommendation P.51. |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.5.1.4.2 Procedure | a) The SS sends a PCM bit stream coded with the value No 1 over the DAI (pin 25). Or alternatively the activation of the A/D and D/A converters is performed via a call setup, in which case the DAI connection between the MS and SS, and the PCM bit stream are optional.
NOTE: The idle channel noise in the receiving direct... |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.5.1.5 Test requirement | The STMR shall be 13 ± 5 dB.
Where a user controlled receive volume control is provided, the STMR shall meet the requirement given above at the setting where the RLR is equal to the nominal value. |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.5.2 Listener Side Tone Rating (LSTR) | |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.5.2.1 Definition | The Listener Sidetone Rating (LSTR) is considered a major parameter affecting the user perception of the system. |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.5.2.2 Conformance requirement | The value of the Listener Sidetone Rating (LSTR) shall not be less than 15 dB.
3GPP TS 03.50, subclause 3.10.1. |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.5.2.3 Test purpose | To verify that the value of LSTR is not less than 15 dB. |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.5.2.4 Method of test | |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.5.2.4.1 Initial conditions | The DAI of the MS is connected to the SS and is set to the operating mode "Test of acoustic devices and A/D & D/A".
The SS sends a PCM bit stream coded with the value No. 1 over the DAI (pin 25) to the MS. |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.5.2.4.2 Procedure | a) The sound field is calibrated in the absence of any local obstacles. The averaged field shall be uniform to within +4 dB/‑2 dB within a radius of 0,15 m of the MRP, when measured in one-third octave bands from 100 Hz to 8 kHz (bands 1 to 20).
b) A calibrated half-inch microphone is mounted at MRP. The sound field is... |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.5.2.5 Test requirement | The LSTR shall not be less than 15 dB. |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.6 Telephone Acoustic coupling Loss (TAL) | |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.6.1 Echo Loss (EL) | |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.6.1.1 Definition | The echo loss is the path loss from the input of the reference speech encoder of the SS to the output of the reference speech decoder of the SS. |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.6.1.2 Conformance requirement | The echo loss from the input to the output of the reference speech codec in the SS shall be at least 46 dB.
3GPP TS 03.50; subclause 3.4.3.2. |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.6.1.3 Test purpose | To verify that the echo loss from the input to the output of the reference speech codec in the SS is at least 46 dB. |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.6.1.4 Method of test | |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.6.1.4.1 Initial conditions | The DAI of the MS is connected to the SS and is set to the operating mode "Normal operation".
The SS sets up a speech call according to the generic call set up procedure.
The handset is mounted in the LRGP (see annex 1 of ITU-T Recommendation P.76) and the earpiece is sealed to the knife-edge of the artificial ear conf... |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.6.1.4.2 Procedure | An implementation of the ITU-T P.50 artificial speech is connected to the analogue or digital input of the reference speech encoder of the SS. This implementation is either a real time algorithm producing the artificial speech or a pre-recorded tape of artificial speech. Both "male" and "female" artificial speech is re... |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.6.1.5 Test requirement | The echo loss from the input to the output of the reference speech codec in the SS shall be at least 46 dB. |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.6.2 Stability margin | |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.6.2.1 Definition | The receive-transmit stability margin is a measure of the gain that would have to be inserted between the go and return paths of the reference speech coder in the SS for oscillation to occur. |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.6.2.2 Conformance requirement | The stability margin shall be at least 6 dB.
3GPP TS 03.50; subclause 3.2. |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.6.2.3 Test purpose | To verify that the stability margin is at least 6 dB. |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.6.2.4 Method of test | |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.6.2.4.1 Initial conditions | For handset operation the handset is placed on a hard plane surface with the transducers facing the surface.
For hands free operation the test setup is shown in ITU-T Recommendation P.34 (figure 3), but omitting the test table.
Where a user controlled volume control is provided it is set to maximum. |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.6.2.4.2 Procedure | a) A gain equivalent to the minimum stability margin is inserted in the loop between the go and return paths of the reference speech coder in the SS and any acoustic echo control is enabled.
b) A test signal according to ITU-T Recommendation O.131 is injected into the loop at the analogue or digital input of the refere... |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.6.2.5 Test requirement | The minimum stability margin shall be 6 dB and no audible oscillation shall be detected. |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.7 Distortion | |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.7.1 Sending | |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.7.1.1 Definition | The transmit signal to total distortion ratio is a measure of the linearity of the transmitter equipment. |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.7.1.2 Conformance requirement | The ratio of signal to total distortion power in the sending direction measured with a psophometric filter at the DAI of the MS or at the output of the reference speech decoder of the SS shall be above the limits given in 3GPP TS 03.50; subclause 3.9.1, table 3, unless the sound pressure at MRP exceeds +10 dBPa.
3GPP T... |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.7.1.3 Test purpose | To verify that the ratio of signal to total distortion power in the sending direction measured with psophometric filter is above the limits given in 3GPP TS 03.50;subclause 3.9.1, table 3. |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.7.1.4 Method of test | |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.7.1.4.1 Initial conditions | The handset is mounted in the LRGP (see annex 1 of ITU-T Recommendation P.76) and the earpiece is sealed to the knife-edge of the artificial ear conforming to ITU-T Recommendation P.51.
When measured at the DAI:
The DAI of the MS is connected to the SS and is set to the operating mode "Test of acoustic devices and A/D ... |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.7.1.4.2 Procedure | a) A sine-wave signal with a frequency in the range 1 004 Hz to 1 025 Hz is applied to the MRP. The level of this signal is adjusted until the level at the DAI output (pin 23) of the MS or at the analogue or digital output of the reference speech decoder of the SS corresponds to ‑10 dBm0. The level of the signal at the... |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.7.1.5 Test requirement | The ratio of signal to total distortion power measured with the psophometric noise weighting (see table 4/ ITU-T G.223) shall be above the limits given in table 30.3.
Table 30.3
dB relative to ARL
Level ratio
‑35 dB
17,5 dB
‑30 dB
22,5 dB
‑20 dB
30,7 dB
‑10 dB
33,3 dB
0 dB
33,7 dB
7 dB
31,7 dB
10 dB
25,5 dB
Limits for ... |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.7.2 Receiving | |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.7.2.1 Definition | The receive signal to total distortion ratio is a measure of the linearity in the receive equipment (excluding the speech decoder). |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.7.2.2 Conformance requirement | The ratio of signal to total distortion power in the receiving direction measured at the ERP or DRP according to the Terminal Supplier's request with psophometric filter shall be above the limits given in 3GPP TS 03.50; subclause 3.9.2, table 5.
3GPP TS 03.50; subclause 3.9.2. |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.7.2.3 Test purpose | To verify that the ratio of signal to total distortion power in the receiving direction measured at the ERP or DRP according to the Terminal Supplier's request with psophometric filter is above the limits given in 3GPP TS 03.50; subclause 3.9.2, table 5. |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.7.2.4 Method of test | |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.7.2.4.1 Initial conditions | The handset is mounted in the LRGP (see annex 1 of ITU-T Recommendation P.76) and the earpiece is sealed to the knife-edge of the artificial ear conforming to ITU-T Recommendation P.51.
The DAI of the MS is connected to the SS and is set to the operating mode "Test of acoustic devices and A/D & D/A". |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.7.2.4.2 Procedure | a) The SS sends, via the DAI (Pin 25), a PCM bit stream simulating a sine-wave signal with a frequency in the range 1 004 Hz to 1 025 Hz corresponding to ITU-T O.132 at the following levels: ‑45 dBm0, ‑40 dBm0, ‑35 dBm0, ‑30 dBm0, ‑25 dBm0, ‑20 dBm0, ‑15 dBm0, ‑10 dBm0, ‑5 dBm0, 0 dBm0.
b) The ratio of signal to total ... |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.7.2.5 Test requirement | The ratio of signal to total distortion power measured at the artificial ear with the psophometric noise weighting (see table 4/ ITU-T Recommendation G.223) shall be above the limits given in table 30.4.
Table 30.4
Level at the digital audio interface
Level ratio
‑45 dBm0
17,5 dB
‑40 dBm0
22,5 dB
‑30 dBm0
30,5 dB
‑20 d... |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.8 Sidetone distortion | |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.8.1 Definition | The sidetone distortion expresses the linearity of the sidetone path in the handset. |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.8.2 Conformance requirement | The third harmonic distortion of the sidetone shall not be greater than 10 %.
3GPP TS 03.50; subclause 3.10.2. |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.8.3 Test purpose | To verify that the third harmonic distortion of the sidetone is not greater than 10 %. |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.8.4 Method of test | |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.8.4.1 Initial conditions | The DAI of the MS is connected to the SS and is set to the operating mode "Test of acoustic devices and A/D & D/A".
The handset is mounted in the LRGP (see annex 1 of ITU-T Recommendation P.76) and the earpiece is sealed to the knife-edge of the artificial ear conforming to ITU-T Recommendation P.51. |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.8.4.2 Procedure | a) The SS sends the PCM bit stream coded with the value No 1 over the DAI (pin 25) to the MS.
b) An instrument capable of measuring the third harmonic distortion of signals with fundamental frequencies in the range 315 Hz to 1 000 Hz is connected to the artificial ear.
c) A pure-tone signal of ‑4,7 dBPa is applied at t... |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.8.5 Test requirement | The third harmonic distortion generated shall not be greater than 10 %. |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.9 Out-of-band signals | |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.9.1 Sending | |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.9.1.1 Definition | The discrimination against out-of-band input signals in the sending direction is a requirement on the in-band image frequencies created by any out-of-band input signals. |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.9.1.2 Conformance requirement | With any sine wave signal above 4,6 kHz and up to 8 kHz applied at the MRP at a level of ‑4,7 dBPa, the level of any image frequency produced at the digital interface shall be below a reference level obtained at 1 kHz (‑4,7 dBPa at MRP) by at least the amount (in dB) specified in 3GPP TS 03.50; subclause 3.11.1, table ... |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.9.1.3 Test purpose | To verify that the conformance requirement is met for input signals with frequencies of 4,65 kHz, 5 kHz, 6 kHz, 6,5 kHz, 7 kHz and 7,5 kHz. |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.9.1.4 Method of test | |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.9.1.4.1 Initial conditions | The handset is mounted in the LRGP (see annex 1 of ITU-T Recommendation P.76) and the earpiece is sealed to the knife-edge of the artificial ear conforming to ITU-T Recommendation P.51.
The DAI of the MS is connected to the SS and is set to the operating mode "Test of acoustic devices and A/D & D/A". |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.9.1.4.2 Procedure | a) A pure tone with a sound pressure of ‑4,7 dBPa is applied at the mouth reference point as described in ITU-T Recommendation P.64 using an artificial mouth conforming to ITU-T Recommendation P 51.
b) For input signals at frequencies of 4,65 kHz, 5 kHz, 6 kHz, 6,5 kHz, 7 kHz, and 7,5 kHz, the level represented by the ... |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.9.1.5 Test requirement | The level of any image frequency shall be below a reference obtained at 1 kHz by at least the amount as specified in table 30.5.
Table 30.5
Applied sine-wave frequency
Limit (minimum)
4,6 kHz
30 dB
8 kHz
40 dB
Limits for the image frequency discrimination.
The limit at intermediate frequencies lies on a straight line d... |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.9.2 Receiving | |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.9.2.1 Definition | The discrimination against out-of-band signals in the receiving direction is a requirement on the out-of-band signals generated in the artificial ear from in-band input signals. |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.9.2.2 Conformance requirement | With a digitally simulated sine wave signal in the frequency range of 300 Hz to 3,4 kHz and at a level of 0 dBm applied at the digital interface, the level of spurious out-of-band image signals in the frequency range of 4,6 to 8 kHz measured selectively in the artificial ear shall be lower than the in-band acoustic lev... |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.9.2.3 Test purpose | To verify that the conformance requirement is met for input signals at the nominal frequencies 500 Hz, 1 000 Hz, 2 000 Hz and 3 350 Hz. |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.9.2.4 Method of test | |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.9.2.4.1 Initial conditions | The handset is mounted in the LRGP (see annex 1 of ITU-T Recommendation P.76) and the earpiece is sealed to the knife-edge of the artificial ear conforming to ITU-T Recommendation P.51.
The DAI of the MS is connected to the SS and is set to the operating mode "Test of acoustic devices and A/D & D/A". |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.9.2.4.2 Procedure | a) The SS sends over the DAI (pin 25) a PCM bit stream simulating a sine-wave signal with a level of 0 dBm0.
b) For input signals at the nominal frequencies 500 Hz, 1 000 Hz, 2 000 Hz and 3 350 Hz (bearing in mind the restriction on sub-multiples of the sampling frequency) the level of any out-of-band signals at freque... |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.9.2.5 Test requirement | The level of out-of-band signals shall be lower than the in-band acoustic level obtained by a digital signal at 1 kHz set at the level specified in table 30.6.
Table 30.6
Image signal frequency
Equivalent input signal level
4,6 kHz
‑35 dBm0
8 kHz
‑45 dBm0
Limits for the image frequency discrimination.
The limit at inte... |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.10 Idle channel noise | |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.10.1 Sending | |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.10.1.1 Definition | The idle channel noise in the sending direction is the equivalent noise level produced at the DAI, when the mouth reference point is in a quiet environment. |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.10.1.2 Conformance requirement | The idle noise in the sending direction shall not exceed - 64 dBm0p at the UPCMI under silent conditions.
3GPP TS 03.50; subclause 3.6.1. |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.10.1.3 Test purpose | To verify that the idle noise in the sending direction does not exceed -64 dBm0p at the UPCMI under silent conditions. |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.10.1.4 Method of test | |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.10.1.4.1 Initial conditions | The handset is mounted in the LRGP (see annex 1 of ITU-T Recommendation P.76) and the earpiece is sealed to the knife-edge of the artificial ear conforming to ITU-T Recommendation P.51 in a quiet environment (ambient noise less than 30 dBA).
The DAI of the MS is connected to the SS and is set to the operating mode "Tes... |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.10.1.4.2 Procedure | The noise level represented by the PCM bit stream output at the DAI (pin 23) is measured with psophometric weighting according to ITU-T Recommendation G.223, table 4.
NOTE: The ambient noise criterion should be met if the ambient noise does not exceed NR20. |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.10.1.5 Test requirement | The noise produced by the MS in the sending direction shall not exceed ‑64 dBm0p. |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.10.2 Receiving | |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.10.2.1 Definition | The idle channel noise in the receiving direction is the acoustic sound pressure in the artificial ear when the digital input signal at the DAI, is the PCM coded value No 1. |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.10.2.2 Conformance requirement | 1. If no user controlled receiving volume control is provided, or if it is provided, at the setting of the user controlled receiving volume at which the RLR is equal to the nominal value, the noise measured in the artificial ear contributed by the receiving equipment alone shall not exceed -57 dBPa (A) when driven by a... |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.10.2.3 Test purpose | 1. To verify that the idle noise in the receiving direction does not exceed -57 dBPa (A). If a user controlled receive volume control is provided it shall be set to the position where RLR is equal to the nominal value.
2. To verify that if a user controlled receive volume control is provided, the idle noise in the rece... |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.10.2.4 Method of test | |
683b5b8a98f7b1390ddd5516ea9247a2 | 51.010-1 | 30.10.2.4.1 Initial conditions | The handset is mounted in the LRGP (see annex 1 of ITU-T Recommendation P.76) and the earpiece is sealed to the knife-edge of the artificial ear conforming to ITU-T Recommendation P.51.
The DAI of the MS is connected to the SS and is set to the operating mode "Test of acoustic devices and A/D & D/A". |
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