GR64 Integrators Manual
Page: 55/104
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Ce document est la propriété exclusive de WAVECOM. Il ne peut être communiqué ou divulgué à des tiers sans son autorisation préalable
5.9.4
Speaker Signals (EARP, EARN)
EARP and EARN are the speaker output signals. These are differential-mode outputs.
With a full-scale PCM input to the CODEC, 0 dB audio output gain setting, and a
differential load RL = 30 ohm, the output voltage between EARP and EARN is 1.5 V
rms. For load resistances less than 30 ohm
, the full-scale output needs is limited
using the Wireless CPU’s internal programmable gain attenuator.
Figure 18: EAR output connections to the Wireless CPU
The electrical characteristics are given in the table below.
Parameter
Conditions
Min
Typ
Max
Unit
Input voltage full scale
RL = 30 ohm
1.34
1.5
1.68
Vrms
RL = 16 ohm
1.41
Vrms
RL = 8 ohm
1.24
Vrms
Frequency response
-3dB cut-off
300
3400
Hz
