User's Manual

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Note d’étude / Technical document : URD1 – 5625.1 – 006 / 69796 Edition 03
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3.2.6 Characteristics of the microphone and speaker recommended by SAGEM
3.2.6.1 Characteristics of the microphone recommended by SAGEM
Item to be inspected Acceptance criterion
Sensitivity -32 dB SPL +/- 3 dB (0 dB = 1 V/Pa @ 1kHz) or
-40 dB SPL +/- 3 dB (0 dB = 1 V/Pa @ 1kHz)
Frequency response Limits (relatives values)
Freq. (Hz) Lower limit Upper limit
100 -1 +1
200 -1 +1
300 -1 +1
1000 0 0
2000 -1 +1
3000 -1.5 +1.5
3400 -2 +2
4000 -2 +2
Current consumption 1 mA (maximum)
Operating voltage DC 1 to 3 V (minimum)
S / N ratio 55 dB minimum (A-Curve at 1 kHz, 1 Pa)
Directivity Omni-directional
Maximum input sound pressure level 100 dB SPL (1 kHz)
Maximum distortion 1%
Radio frequency protection Over 800 - 1200 MHz and 1700 - 2000 MHz, S/N ratio 50
dB minimum (signal 1 kHz, 1 Pa)
3.2.6.2 Characteristics of the dual mode speaker recommended by SAGEM
Inspection non operating
Item to be inspected Acceptance criterion
Input power: rated / max 0.5 W / 1 W
DC Impedance
6 Ω +/- 10 %
Resonance frequency (Fo) 480 Hz +/- 10%
Magnetic field < 50 Gauss at 5 mm on the back side of the speaker
Weight < 3.0 g
Inspection operating
Test condition: Receiver is measured with IEC 318 coupler in sealed condition
Item to be inspected Acceptance criterion
Frequency response
Input Voltage: 60mV
rms
Freq Lower limit Nom. value Upper Limit
(Hz) (dBSPL) (dBSPL) (dBSPL)
200 119 121 123
400 122 124 126
700 125 127 129
800 125 127 129
1000 120 122 124
1500 111 113 115
2000 108 110 112
3000 103 105 107
4000 98 100 102
S / N ratio 50 dB minimum (A-Curve at 1 kHz, 1 Pa)
3.3 Network LEDs
The MO300 module can manage two PWM outputs, for example to drive two network LED.
These LED could be used to interact with the network activity and the MO300 states.