SYSTEM CONNECTOR INTERFACE
31
LZT 123 8020 R1A
Additional Gain in car kit mode
28.5 dB
The following tables show the nominal PGA (programming gain
settings). For more information see the relevant AT commands.
Maximum input voltage limit: 245 mV
rms
Input Input
(mV
rms
)
TXAGC (dB)
AUX AMP
gain
PCMOUT (dBm0)
ATMS
245
0
13
3
Maximum input level at MICI, 61.4 mV
rms
output at
PCMOUT = 3 dBm0
Input Differential
input (mV
rms
)
TXAGC (dB)
AUX AMP
gain
PCMOUT (dBm0)
MICN
MICP
61.4
0
25
3
Output at AFMS for 3 dBm0 at PCMIN
Input dBm0
RXPGA
Volume
control (dB)
AFMS (mV
rms
)
PCMIN
3
0
0
436
Output at BEARN/BEARP for 3 dBm0 at PCMIN
Input dBm0
RXPGA
Volume
control (dB)
BEAR (mV
rms
)
PCMIN
3
0
0
388
5.7.2
Audio From Mobile Station - AFMS
AFMS is the analogue audio output from the radio device and
may be used to drive a speaker or the ear-piece in a car kit.
PCM digital audio signals, entering the radio device through the
PCMIN pin, are translated to analogue signals by the CODEC.
See
PCM Digital Audio
for further information.
The table below shows the audio signal levels for AFMS.
Parameter
Limit
Speaker impedance
64
Ω
to 1 k
Ω
Output Capacitance
2.2
µF ±10 %
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