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參數(shù)資料
| 型號： | FX818 |
| 元件分類： | Codec |
| 英文描述： | CTCSS Super Codec |
| 中文描述： | 超級亞音頻編解碼器 |
| 文件頁數(shù)： | 9/26頁 |
| 文件大?。?/td> | 676K |
| 代理商： | FX818 |
CTCSS Signalling Processor
FX818
1997
Consumer Microcircuits Limited
9
D/818/4
SUB-AUDIO CONTROL Register (Hex address $80)
This register is used to control the functions of the device as described below:
CTCSS TX ENABLE
and DECODER
ENABLE
(Bits 7 and 6)
These two bits enable and disable the CTCSS decoder (Rx) or transmitter (Tx)
according to the table below:
Tx
Bit 7
0
0
1
1
Rx
Bit 6
0
1
0
1
Function
Tx disabled, Rx disabled
Tx disabled, Rx enabled
Tx enabled, Rx disabled
Tx enabled, Rx enabled
CTCSS FAST
DETECT ENABLE
(Bit 5)
When this bit is "1", the "FAST CTCSS DETECT" or "FAST CTCSS
PREDICTIVE" mode is enabled, depending upon the setting of FAST CTCSS
MODE (Bit 3 SUB-AUDIO SET-UP Register, $82). When this bit is "0", both
"FAST CTCSS DETECT" and "FAST CTCSS PREDICTIVE" tone detectors are
disabled.
(Bits 4, 3, 2, 1 and 0)
Reserved for future use. These bits should be set to "0".
SUB-AUDIO SET-UP Register (Hex address $82)
This register is used to define the CTCSS parameters, as described below:
CTCSS DECODER
BANDWIDTH
(Bits 7, 6, 5 and 4)
These four bits set the bandwidth of the CTCSS tone decoder according to
the table below:
BANDWIDTH
Bit 7
1
1
1
1
1
1
1
1
Bit 6
0
0
0
0
1
1
1
1
Bit 5
0
0
1
1
0
0
1
1
Bit 4
0
1
0
1
0
1
0
1
Will Decode
±1.1%
±1.3%
±1.6%
±1.8%
±2.0%
±2.2%
±2.5%
±2.7%
Will Not Decode
±2.4%
±2.7%
±2.9%
±3.2%
±3.5%
±3.7%
±4.0%
±4.2%
FAST CTCSS MODE
(Bit 3)
When CTCSS FAST DETECT ENABLE (Bit 5 SUB-AUDIO CONTROL Register,
$80) is "1", this bit selects the "FAST CTCSS DETECT" or the "FAST CTCSS
PREDICTIVE" mode, according to the table below:
相關PDF資料 |
PDF描述 |
|---|---|
| FX836 | R2000 System Audio Processor |
| FX836DW | Telecommunication IC |
| FX836J | Telecommunication IC |
| FX839 | Analogue Control Interface |
| FX856 | |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| FX818D2 | 制造商:CMLMICRO 制造商全稱:CML Microcircuits 功能描述:CTCSS SIGNALLING PROCESSOR |
| FX826 | 制造商:CMLMICRO 制造商全稱:CML Microcircuits 功能描述:AMPS/TACS System Audio Processor |
| FX826DW | 制造商:CMLMICRO 制造商全稱:CML Microcircuits 功能描述:AMPS / TACS SYSTEM AUDIO PROCESSOR |
| FX826J | 制造商:CMLMICRO 制造商全稱:CML Microcircuits 功能描述:AMPS/TACS System Audio Processor |
| FX828 | 制造商:CMLMICRO 制造商全稱:CML Microcircuits 功能描述:CTCSS/DCS/SELCALL Processor |
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