參數(shù)資料
型號: MX812
廠商: Electronic Theatre Controls, Inc.
元件分類: Codec
英文描述: VSR CODEC WITH DRAM CONTROL
中文描述: 振動時效編解碼器DRAM的控制
文件頁數(shù): 10/13頁
文件大?。?/td> 115K
代理商: MX812
VSR CODEC with DRAM CONTROL
10
MX812 PRELIMINARY INFORMATION
1997 MX
COM Inc.
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA
www.mxcom.com Tele: 800 638-5577 910 744-5050 Fax: 910 744-5054
Doc. # 20480076.003
All trademarks and service marks are held by their respective companies.
Performance
Figure 10 - Typical “Power Reading vs Input Level” Plot
Figure 9 - Typical “SINAD vs Input Level” Plot
Performance
Figure 9 Shows a typical graph of SINAD vs Input Level produced for both 32kbps and 63kbps sample rates
at an input frequency of 1.0kHz.
Figure 10 shows a typical graph of the “Power” reading for increasing input signal levels. The “Power” figure
(0 to 31) is the binary figure obtained from the 5-bit representation in the Status Register - Bits 0, 1, 2, 3 and 4
while the Codec is selected to the Encode mode.
This reading is updated at the end of every Store or Wait command; Excessive input signal levels will record
“11111
2
” (31
10
).
0
5
10
15
20
25
30
35
-30
-27
-24
-21
-18
-15
-12
-9
-6
-3
0dB.
(308mVrms)
Input Level (dB)
6
.
SINAD (dB)
Sample Rate = 63kb/s
Sample Rate = 32kb/s
Sample Rate
63kbps
Sample Rate
32kbps
0
10
20
30
1
10
100
1000
Input Level (mVrms)
Log Scale
'POWER' Reading
Lin Scale
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