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參數(shù)資料
| 型號： | AD1892 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | Integrated Digital Receiver/Rate Converter(數(shù)字音頻接收器/采樣率轉換器) |
| 中文描述： | 集成數(shù)字接收器/頻率轉換器（數(shù)字音頻接收器/采樣率轉換器） |
| 文件頁數(shù)： | 12/24頁 |
| 文件大?。?/td> | 250K |
| 代理商： | AD1892 |
AD1892
–12–
REV. 0
RESERVED.
21 BITS
22 BITS
23 BITS
NOT INDICATED
MAX. AUDIO 24 BITS
SOURCE WORD LENGTH
ALL OTHER STATES OF BITS 0–2 ARE RESERVED.
USER DEFINED APPLICATION.
SINGLE COORDINATION SIGNAL. MAXIMUM AUDIO
WORD LENGTH IS 20 BITS.
USED FOR MAIN AUDIO. MAXIMUM AUDIO WORD
LENGTH IS 24 BITS.
NOT DEFINED. MAXIMUM AUDIO WORD LENGTH IS
20 BITS.
AUX: USE OF AUXILIARY SAMPLE BITS
BYTE 2
BITS 0 1 2
0 0 0
0 0 0
0 0 1
0 1 0
0 1 1
X X X
BITS 6 7
X X
BITS 3 4 5
0 0 1
0 1 0
0 1 1
X X X
MAX. AUDIO 20 BITS
NOT INDICATED (DEFAULT)
19 BITS
18 BITS
17 BITS
ALL OTHER STATES OF BITS 3–5 ARE RESERVED.
24 BITS
20 BITS
1 0 0
1 0 0
16 BITS
20 BITS
Figure 13. Professional Channel Status Byte 2
BYTE 3
BITS 0–7
VECTORED TARGET BYTE
RESERVED.
X X X X X X X X
BITS 0 1
GRADE 1 REFERENCE SIGNAL.
GRADE 2 REFERENCE SIGNAL.
RESERVED.
BITS 2–7
RESERVED.
BYTE 4
DIGITAL AUDIO REFERENCE SIGNAL PER AES11-1990
NOT REFERENCE SIGNAL (DEFAULT).
0 0
0 1
1 0
1 1
X X X X X X
BYTE 5
BITS 0–7
RESERVED.
X X X X X X X X
Figure 14. Professional Channel Status Bytes 3 Through 5
BYTES 6–9
ALPHANUMERIC CHANNEL ORIGIN DATA.
7-BIT ISO 646 (ASCII) DATA WITH ODD PARITY BIT. FIRST CHARACTER IN
MESSAGE IS BYTE 6. LSBs ARE TRANSMITTED FIRST.
BYTES 10–13
ALPHANUMERIC CHANNEL ORIGIN DATA.
7-BIT ISO 646 (ASCII) DATA WITH ODD PARITY BIT. FIRST CHARACTER IN
MESSAGE IS BYTE 10. LSBs ARE TRANSMITTED FIRST.
BYTES 14–17
LOCAL SAMPLE ADDRESS CODE (32-BIT BINARY)
VALUE IS OF FIRST SAMPLE OF CURRENT BLOCK. LSBs ARE
TRANSMITTED FIRST.
BYTES 18–21
TIME-OF-DAY SAMPLE ADDRESS CODE (32-BIT BINARY).
VALUE IS OF FIRST SAMPLE OF CURRENT BLOCK. LSBs ARE
TRANSMITTED FIRST.
Figure 15. Professional Channel Status Bytes 6
Through 21
BYTE 22
BITS 0 1 2 3
X X X X
RESERVED.
BIT 4
CHANNEL STATUS BYTES 0 TO 5
RELIABLE.
0
1
UNRELIABLE.
BIT 5
CHANNEL STATUS BYTES 6 TO 13
RELIABLE.
0
1
UNRELIABLE.
BIT 6
CHANNEL STATUS BYTES 14 TO 17
RELIABLE.
0
1
UNRELIABLE.
BIT 7
CHANNEL STATUS BYTES 18 TO 21
RELIABLE.
0
1
UNRELIABLE.
BYTE 23
CRCC: CYCLIC REDUNDANCY CHECK CHARACTER.
CRCC FOR CHANNEL STATUS DATA BLOCK THAT USES BYTES 0 TO 22
INCLUSIVE. GENERATING POLYNOMIAL IS:
G(x) = x
8
+ x
4
+ x
3
+ x
2
+ 1
WITH AN INITIAL STATE OF ALL ONES.
Figure 16. Professional Channel Status Bytes 22 and 23
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相關代理商/技術參數(shù) |
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