1. SCOPE

This specification covers our product of dynamic receiver unit for mobile telephone use.

2. MECHANICAL LAYOUT & DIMENSIONS

Shown in Fig.5

3. GENERAL REQUIREMENTS

3.1 OPERATING TEMPERATURERANGE: -20℃ ~ +60℃

3.2 STANDARD TEST CONDITIONS:

Temperature: 17～25℃
Relative Humidity:45%～80%(RH)
Air Pressure:860～1060 hPa

3.3 JUDGEMENT CONDITIONS:

Temperature:20±2℃
Relative Humidity:60%～70%(RH)
Air Pressure:860～1060 hPa

4. RECEIVER MODE

4.1 SOUND PRESSURE LEVEL

113±3dB S.P.L. at 1KHz (0dB S.P.L.=20μPa)
Input voltage: 179mV (Sine wave) measured with IEC318 coupler.

4.2 IMPEDANCE: 32±15% Ω(at 1KHz 179mV)

4.3 MEASURING DIAGRAM: Shown in Fig.1

4.4 FREQUENCY RESPONSE MASK & TYPICAL FREQUENCY RESPONSE CURVE:

Shown in Fig.2.

4.5 EARPIECE:Show in Fig.3

4.6 RATED POWER: 10mW.(White noise)

4.7 DISTORTION: <5% THD at 95dB S.P.L. at 300Hz~3400Hz

■ FREQUENCY MEASURING DIAGRAM(RECEIVER MODE)(Fig.1)

■ FREQUENCY RESPONSE MASK & TYPICAL FREQUENCY RESPONSE CURVE(RECEIVER MODE)(Fig.2)

■ EAR PIECE(Fig.3)

5. RELIABILITY TESTS

The sound pressure as specified shall neither deviate more than ±3dB from the initial value, nor any significant damage after any of following testing.

5.1 HIGH TEMPERATURE TEST

High temperature:+70±2℃
Duration:72 hours

5.2 LOW TEMPERATURE TEST

Low temperature:-40±2℃
Duration:72 hours

5.3 HUMIDITY TEST

Temperature:+40±2℃
Relative humidity:90～95%
Duration:96 hours

5.4 TEMPERATURE CYCLE TEST (See in Fig.4)

Temperature:-40℃+70℃
Duration:2 hours2 hours
Cycle:2

5.5 DROP TEST

Mounted with dummy set mass:100 g
Height:1.52 m
Cycle:6 (1 each plain)
onto the concrete board

5.6 LOAD TEST

Receiver mode: White noise (EIA filter) for 96 hours at 10 mW input power.

■ TEMP. CYCLE TEST (Fig.4)

6. DIMENSIONS (Fig.5)

7. PACKING DETAILS (Fig.6)