Enabler II-G Assiste GPS Integration Guide - Farnell
Enabler II-G Assiste GPS Integration Guide - Farnell
Enabler II-G Assiste GPS Integration Guide - Farnell
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Enfora <strong>Enabler</strong> <strong>II</strong>I-G<br />
Modem <strong>Integration</strong> <strong>Guide</strong><br />
An external audio amplifier should be used for loads of less than 16 Ω or if volume is inadequate.<br />
6.6.23. Headset Microphone Input (Pin 55)<br />
Mic Input<br />
The headset differential<br />
inputs HSMIC and AUXI<br />
can be amplified by the<br />
differential handset<br />
microphone amplifier.<br />
This amplifier has two<br />
different gains 4.9 dB or<br />
25.6 dB and a bias<br />
generator HSMICBIAS<br />
provides an external<br />
voltage of 2 V or 2.5 V to<br />
bias the microphone.<br />
Headset Mic Input<br />
Parameter/Conditions Min Typ Max Units<br />
Maximum Input Range Inputs 3 dBm0 (Maximum<br />
digital sample amplitude with<br />
PGA gain set to 0 dB),<br />
AUXAMP gain = 18 dB, Single<br />
HSMIC<br />
78 mVRMS<br />
Nominal Ref. Level -10 dBm0<br />
Microphone Pre-<br />
18 dB<br />
Amplifier Gain<br />
Input resistance at<br />
HSMIC<br />
HSMIC single input, AUXAMP<br />
gain = 18 dB<br />
6.6.24. Headset Microphone Bias Output (Pin 53)<br />
40.5 kΩ<br />
Mic Bias Output Parameter/Conditions Min Typ Max Units<br />
Bias Voltage on Mic(+) Set to 2.0 V 1.9 2.1 Vdc<br />
Set to 2.5 V 2.4 2.6 Vdc<br />
Mic Bias Current<br />
Capability<br />
2.0 mA<br />
GSM0308PB001 57 Version 1.03– 7/17/2007
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