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參數(shù)資料
| 型號： | SAA7284 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | Terrestrial digital sound decoder for conventional intercarrier PLL-IF systems |
| 中文描述： | 地面數(shù)字音頻解碼器為傳統(tǒng)載波鎖相環(huán)中頻系統(tǒng) |
| 文件頁數(shù)： | 21/40頁 |
| 文件大?。?/td> | 182K |
| 代理商： | SAA7284 |
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1996 Oct 24
21
Philips Semiconductors
Preliminary specification
Terrestrial digital sound decoder for
conventional intercarrier PLL-IF systems
SAA7284
SYSTEM PERFORMANCE
Bit Error Rate (BER)
Table 17 shows input signal conditions which typically produce bit error rates of less than 10
3
. Signal levels given in dB
are related to the picture carrier reference level (0 dB) and based on the output level of the set up as shown in Fig.8.
All measurements are at RF and using Philips Semiconductors SAA7284 Applications Board.
Table 17
System performance
Notes
1.
Measurements made with colour bar at 100% modulation.
a) FM level =
10 dB system I;
13 dB system BG.
b) NICAM level =
20 dB (unless otherwise specified).
10 dB sound shelf with extended bandwidth for NICAM signal.
14 dB sound shelf with extended bandwidth for NICAM signal.
2.
3.
Acquisition time
Maximum acquisition time = 1 s, measured from power-on to reset in-sync condition achieved.
INPUT SIGNAL CONDITIONS
(1)
SYSTEM I
SYSTEM BG
UNIT
SAW A
(2)
SAW B
(2)
SAW C
(3)
Picture carrier RF level (FM deviation =
±
50 kHz)
NICAM level with respect to picture carrier (FM deviation =
±
50 kHz)
FM overmodulation
35
35
>120
35
34
>100
35
32
>100
dB
dB
kHz
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