8
KX-TG8411HGB/KX-TGA840FXB
4.2.
Circuit Operation (Base Unit)
4.2.1.
Outline
Base Unit consists of the following ICs as shown in
Block Diagram (Base Unit)
(P.7).
• DECT BBIC (
B
ase
B
and IC): IC7
- Handling all the audio, signal and data processing needed in a DECT base unit
- Controlling the DECT specific physical layer and radio
section (
B
urst
M
odule
C
ontroller section)
- ADPCM code filter for speech encoding and speech decoding (DSP section)
- Echo-cancellation and Echo-suppression (DSP section)
- Any tones (tone, sidetone, ringing tone, etc.) generation (DSP section)
- DTMF receiver (DSP section)
- Clock Generation for RF Module
- ADC, DAC, timer, and power control circuitry
- PLL Oscillator
- Detector
- Compress/Expander
- First Mixer
- All interfaces (ex: RF Power Amp, EEPROM, LED, Analog Front End, etc.)
• RF Power Amp.: IC801
- Amplifier for transmission and reception
• EEPROM: IC401
- Temporary operating parameters (for RF, etc.)
• Additionally,
- Power Supply Circuit (+3.0 V, +2.4 V, +1.8 V output)
- Crystal Circuit (10.368 MHz)
- Charge Circuit
- Telephone Line Interface Circuit
Summary of Contents for KX-TG8411HGB
Page 2: ...2 KX TG8411HGB KX TGA840FXB ...
Page 14: ...14 KX TG8411HGB KX TGA840FXB 4 6 Signal Route ...
Page 22: ...22 KX TG8411HGB KX TGA840FXB 7 6 Troubleshooting ...
Page 23: ...23 KX TG8411HGB KX TGA840FXB Cross Rreference For Service Hint P 26 ...
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Page 26: ...26 KX TG8411HGB KX TGA840FXB 7 7 For Service Hint Cross Reference Battery Charge P 16 ...
Page 27: ...27 KX TG8411HGB KX TGA840FXB 8 Service Mode 8 1 Engineering Mode 8 1 1 Base Unit ...
Page 29: ...29 KX TG8411HGB KX TGA840FXB 8 1 2 Handset ...
Page 38: ...38 KX TG8411HGB KX TGA840FXB Cross Reference Check Point Base Unit P 46 ...
Page 40: ...40 KX TG8411HGB KX TGA840FXB Cross Reference Check Point Handset P 50 ...
Page 55: ...55 KX TG8411HGB KX TGA840FXB 10 1 2 Handset ...
Page 56: ...56 KX TG8411HGB KX TGA840FXB 10 1 3 Charger Unit ...
Page 57: ...57 KX TG8411HGB KX TGA840FXB 10 2 How to Replace the Handset LCD ...
Page 79: ...79 KX TG8411HGB KX TGA840FXB Memo ...
Page 92: ...92 KX TG8411HGB KX TGA840FXB 15 3 Cabinet and Electrical Parts Charger Unit ...
Page 93: ...93 KX TG8411HGB KX TGA840FXB 15 4 Accessories and Packing Materials 15 4 1 KX TG8411HGB ...
Page 94: ...94 KX TG8411HGB KX TGA840FXB 15 4 2 KX TGA840FXB ...