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Enfora Enabler II-G Assisted GPS
Modem Integration Guide
6.6.12. Handset Speaker Output
Parameter Conditions MIN TYP MAX UNIT
Maximum Swing –
Ear(+) to Ear(-)
R
L
= 32 Ω & 5% distortion
1.2 1.5 V
pp
Maximum Capacitive Load –
Ear(+) to Ear(-)
100 pF
Amplifier Gain 1 dB
Amplifier State in Power Down
High Z
Enfora recommends an external audio amplifier for loads of less than 16 Ω or if volume is
inadequate.
6.6.13. Headset Microphone Input
Parameter Conditions MIN TYP MAX UNIT
Maximum Input Range –
Mic(+) to Mic(-)
Inputs 3 dBm0 (Max. digital
sample amplitude when PGA
gain set to 0 dB)
32.5 mVrms
Nominal Ref. Level –
Mic(+) to Mic(-)
-10 dBm0
Differential Input Resistance –
Mic(+) to Mic(-)
100 kΩ
Microphone Pre-Amplifier Gain 25.6 dB
Bias Voltage on Mic(+)
2.0 or 2.5 V
2.0 2.5 Vdc
Mic Bias Current Capability 0 0.5 mA
6.6.14. Headset Speaker Output
Parameter Conditions MIN TYP MAX UNIT
Maximum Swing –
HS Spkr (+) to (-)
R
L
= 32 Ω & 5% distortion
1.6 1.96 V
pp
Maximum Capacitive Load –
HS Spkr (+) to (-)
100 pF
Amplifier Gain -7 -5 dB
Amplifier State in Power Down
High Z
The headset speaker output is a single ended output. Enfora recommends an external audio
amplifier for loads of less than 32 Ω or if volume is inadequate.
MLG0208PB001 36 Version1.01 – 10/3/2006