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3. TECHNICAL BRIEF
BB Transmit section
This section generates in-phase and quadrature BB modulated GMSK signals (BT = 0.3) in
accordance with GSM 05.05 Phase 2 specifications.
• The transmit channel consists of a digital GMSK modulator, a matched pair of 10-bit DACs and a
matched pair of reconstruction filter.
BB Receive section
This section consists of two identical ADC channels that process baseband in-phase(I) and
quadrature(Q) input signals.
Each channel consists of a coarse switched capacitor input filter, followed by a high-order sigma-delta
modulator and a lowpass digital filter.
Auxiliary section
This section contains two auxiliary DACs(AFC DAC, IDAC) for system control.
This section also contains AUX ADC and Voltage Reference
AUX ADC
: 6 channel 10 bits
AFC DAC
: 13 bits
IDAC
: 10 bits
Voiceband section
Receive audio signal from MIC. The phones use differential configuration.
Send audio signal to Receiver. The phones use differential configuration.
It interconnects external devices such as main microphone, main receiver, ear-phone and Hands
free kit through the VINNORP, VINNORN, VOUTNORP, VOUTNORN, VINAUXP, VINAUXN,
VOUTAUXP, VOUTAUXN
VINNORP, VINNORN: Main MIC positive/negative terminal.
VOUTNORP, VOUTNORN: Main Receiver positive/negative terminal.
VINAUXP, VINAUXN: Hands free kit microphone positive/negative terminal.
VOUTAUXP, VOUTAUXON: Hands free kit speaker positive/negative terminal.
Содержание G3100
Страница 32: ... 34 3 TECHNICAL BRIEF Figure 3 20 TX IQ Signal Figure 3 21 RX IQ Signal ...
Страница 40: ... 42 Figure 3 26 1 Voice band circuit diagram Headset Hands free kit part 1 3 TECHNICAL BRIEF ...
Страница 42: ... 44 Figure 3 27 AD6521 circuit diagram 3 TECHNICAL BRIEF ...
Страница 73: ... 75 4 3 8 Receiver RF Level Figure 4 1 Test Points of Rx Level 4 TROUBLE SHOOTING ...
Страница 74: ... 76 4 3 9 Transmitter RF Level Figure 4 2 Test Points of Tx Level 4 TROUBLE SHOOTING ...
Страница 81: ... 83 The Receiver part Circuit Diagram C203 C207 C206 4 TROUBLE SHOOTING ...
Страница 87: ... 89 R202 MIC201 R204 C204 C201 R208 R206 C208 Q203 4 TROUBLE SHOOTING ...
Страница 93: ... 95 Test SIM Connector Check J301 4 TROUBLE SHOOTING ...
Страница 97: ... 99 J201 R240 C234 L201 R241 4 TROUBLE SHOOTING U205 U203 U204 ...
Страница 101: ... 103 CN302 U203 U204 4 TROUBLE SHOOTING ...
Страница 102: ... 104 U205 4 TROUBLE SHOOTING ...
Страница 104: ...5 DISASSEMBLY INSTRUCTION 106 3 Detach the rest components as shown below Figure 5 3 Detaching the rest components ...
Страница 108: ...3 Press Start and Wait until Erase is completed 110 1 Press Start 2 Confirm completion 6 SOFTWARE DOWNLOAD ...
Страница 117: ... 119 9 PCB LAYOUT 9 1 Rear Part ...
Страница 118: ...9 2 Front Part 120 ...
Страница 124: ... 126 11 2 Standalone Test Equipment Setup GSM Test Equipment Power Supply PC JIG RS 232 Cable Phone 11 STAN ALONE TEST ...
Страница 134: ... 137 13 EXPLODED VIEW REPLACEMENT PART LIST 13 1 Exploded View ...