參數(shù)資料
型號(hào): FX818
元件分類: Codec
英文描述: CTCSS Super Codec
中文描述: 超級(jí)亞音頻編解碼器
文件頁(yè)數(shù): 6/26頁(yè)
文件大?。?/td> 676K
代理商: FX818
CTCSS Signalling Processor
FX818
1997
Consumer Microcircuits Limited
6
D/818/4
1.4
External Components
C1
C2
C3
C4
C5
C6
C7
C8
22pF
22pF
100pF
0.1μF
100pF
0.1μF
Note 2
0.1μF
±20%
±20%
±20%
±20%
±20%
±20%
±20%
±20%
R1
R2
R3
R4
R5
R6
1M
100k
100k
Note 2
22k
Note 1
±5%
±10%
±10%
±10%
±10%
±10%
X1
4.032MHz
±100ppm
Notes:
1.
R2, R6 and C3 form the gain components for the Summing Amplifier. R6 should be chosen as
required from the system specification, using the following formula:
Tx Sub Audio Gain
=
R2
R6
2.
R3, R4, C5 and C7 form the gain components for the Rx Input Amplifier. R4 should be chosen
as required by the signal level, using the following formula:
Gain
=
R3
R4
C7 x R4 should be chosen so as not to compromise the low frequency performance of this
product.
Figure 2 Recommended External Components
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