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43
KX-FC265GR-T
6.9.
Transmitter / Receiver (Cordless)
Base Unit and Cordless Handset mainly consist of RF Module and DECT BBIC.
Base Unit and Cordless Handset transmit/receive voice signal and data signal through the antenna on carrier frequency.
6.9.1.
Transmitter Block
The voice signal input from the TEL LINE interface goes to RF Module (IC28) through DECT BBIC (IC4).
The voice signal passes through the analog part of IC4 where it is amplified and converted to a digital audio stream signal. The
burst switch controller processes this stream performing encryption and scrambling, adding the various other fields to produce
the GAP (
G
eneric
A
ccess
P
rofile) standard DECT frame, assigning to a time slot and channel etc.
In IC28, the carrier frequency is changing, and frequency modulated RF signal is generated and amplified, and radiated from
antenna. Cordless Handset detects the voice signal or data signal in the circuit same as the following explanation of Receiver
Block.
6.9.2.
Receiver Block
The signal of 19.2 MHz band (18.81792 MHz ~ 18.97344 MHz) which is input from antenna is input to IC28.
In IC28, the signal of 19.2 MHz band is down converted to 864 kHz signal and demodulated, and goes to IC4 as GAP (
G
eneric
A
ccess
P
rofile) standard DECT frames. It passes through the decoding section burst switch controller where it separates out the
frame information and performs de-encryption and de-scrambling as required. It then goes to the DSP section where it is turned
back into analog audio. This is amplified by the analog front end, and goes to the TEL LINE Interface.
Содержание KX-FC265GR-T
Страница 13: ...13 KX FC265GR T 4 2 1 2 Error Messages Report 4 2 2 Cordless Handset ...
Страница 22: ...22 KX FC265GR T 6 4 2 Block Diagram ...
Страница 24: ...24 KX FC265GR T ...
Страница 37: ...37 KX FC265GR T b Redundancy Compression Process Coding Mode This unit uses one dimensional MH format ...
Страница 61: ...61 KX FC265GR T Note Refer to Program Mode Table P 102 ...
Страница 69: ...69 KX FC265GR T 11 2 Cordless Handset ...
Страница 72: ...72 KX FC265GR T 11 3 2 Service Mode Settings Note The above values are the default values ...
Страница 80: ...80 KX FC265GR T Countermeasure ...
Страница 81: ...81 KX FC265GR T REFERENCE Test Mode P 62 ...
Страница 82: ...82 KX FC265GR T REFERENCE Test Mode P 62 ...
Страница 83: ...83 KX FC265GR T REFERENCE Test Mode P 62 ...
Страница 84: ...84 KX FC265GR T REFERENCE Test Mode P 62 ...
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Страница 86: ...86 KX FC265GR T REFERENCE Test Mode P 62 ...
Страница 87: ...87 KX FC265GR T REFERENCE Test Mode P 62 ...
Страница 91: ...91 KX FC265GR T ...
Страница 116: ...116 KX FC265GR T ...
Страница 123: ...123 KX FC265GR T I O and Pin No Diagram ...
Страница 126: ...126 KX FC265GR T 12 5 5 2 NG Example ...
Страница 130: ...130 KX FC265GR T 12 5 7 2 Troubleshooting Flow Chart ...
Страница 136: ...136 KX FC265GR T 12 5 11 Thermal Head Section Note Refer to Thermal Head P 23 ...
Страница 145: ...145 KX FC265GR T 13 Service Fixture Tools ...
Страница 149: ...149 KX FC265GR T 14 2 5 Cordless Handset Section REFERENCE E 1 How to Remove the Cordless Handset Board P 173 ...
Страница 150: ...150 KX FC265GR T 14 3 Disassembly Procedure 14 3 1 How to Remove the Image Sensor CIS ...
Страница 151: ...151 KX FC265GR T 14 3 2 How to Remove the Thermal Head ...
Страница 152: ...152 KX FC265GR T ...
Страница 153: ...153 KX FC265GR T 14 3 3 How to Remove the Bottom Frame ...
Страница 154: ...154 KX FC265GR T 14 3 4 How to Remove the P C Boards and Speaker ...
Страница 155: ...155 KX FC265GR T 14 3 5 How to Remove the Power Supply Board and AC Cord ...
Страница 156: ...156 KX FC265GR T 14 3 6 How to Remove the Gear Block and Separation Roller ...
Страница 157: ...157 KX FC265GR T 14 3 7 How to Remove the Gears Motors and Arms of the Gear Block ...
Страница 158: ...158 KX FC265GR T ...
Страница 159: ...159 KX FC265GR T 14 3 8 How to Remove the Charger Board A ...
Страница 160: ...160 KX FC265GR T 14 3 9 How to Remove the Back Cover ...
Страница 161: ...161 KX FC265GR T 14 3 10 How to Remove the Platen Roller and Lock Lever ...
Страница 162: ...162 KX FC265GR T ...
Страница 163: ...163 KX FC265GR T 14 3 11 How to Remove the Pickup Roller and Antenna ...
Страница 164: ...164 KX FC265GR T 14 3 12 How to Remove the Operation Panel ...
Страница 165: ...165 KX FC265GR T 14 3 13 How to Remove the Operation Board MIC Board and LCD ...
Страница 166: ...166 KX FC265GR T 14 3 14 How to Remove the Separation Holder and Exit Roller ...
Страница 167: ...167 KX FC265GR T 14 3 15 Installation Position of the Lead Wires 14 3 15 1 Lower Section ...
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Страница 171: ...171 KX FC265GR T 14 3 15 2 Operation Panel Section ...
Страница 172: ...172 KX FC265GR T 14 3 15 3 Back Cover Section ...
Страница 173: ...173 KX FC265GR T 14 3 16 How to Remove the Cordless Handset Board ...
Страница 174: ...174 KX FC265GR T 14 3 16 1 How to Replace the LCD ...
Страница 196: ...196 KX FC265GR T 16 2 3 4 Copying Note See Sensor Locations in Sensor and Switches P 28 REFERENCE Sensor Section P 133 ...
Страница 203: ...203 KX FC265GR T 17 1 7 Cordless Handset Board ...
Страница 208: ...208 KX FC265GR T 17 4 Test Chart 17 4 1 ITU T No 1 Test Chart ...
Страница 209: ...209 KX FC265GR T 17 4 2 ITU T No 2 Test Chart ...
Страница 210: ...210 KX FC265GR T 17 4 3 Test Chart ...
Страница 211: ...211 KX FC265GR T Memo ...
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Страница 272: ...272 KX FC265GR T K T KXFC265GRT ...