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參數(shù)資料
| 型號： | STV8226 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | Multistandard TV Audio Processor and Digital Sound Demodulator |
| 中文描述： | 多標(biāo)準(zhǔn)電視音頻處理器和數(shù)字聲音解調(diào)器 |
| 文件頁數(shù)： | 54/97頁 |
| 文件大?。?/td> | 1871K |
| 代理商： | STV8226 |
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Register List
STV82x6
54/97
CETH2
Channel 2 FM Carrier Level Threshold
SQTH2
Channel 2 FM Squelch Threshold
Bit Name
Reset
Function
CRF2[7:0]
00000000
Channel 2 Carrier Recovery Frequency
.
Displays the instantaneous frequency offset of the Channel 2 Baseband PLL
Address (hex): 38h
Type: R/W
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
CETH2[7:0]
Bit Name
Reset
Function
CETH2[7:0]
00100000
This register is used to compare the carrier level in the channel and the threshold value. This
level is measured after the channel filter and is relative to the full scale reference level (0 dB).
This is used as part of the validation of an FM signal, if the carrier level is below the threshold,
the signal is considered to be non-valid.
CETH
FFh
80h
40h
20h
Threshold (dB)
-6
-12
-18
-24 (Default)
CETH
10h
08h
00h
Threshold (dB)
-32
-38
OFF (All carrier levels are accepted)
Address (hex): 39h
Type: R/W
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
SQTH2[7:0]
Bit Name
Reset
Function
SQTH2[7:0]
00111100
The squelch detector measures the level of high frequency noise (> 40 kHz) and compares it to
the threshold level (SQTH). If the level is below this value, the S/N of the FM signal is
considered to be acceptable. Values are given for FM with standard deviation.
SQTH
S/N (dB)
FAh
77h
3Ch
23h
19h
0
10
15 (Default)
20
25
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| STV8237 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Digital Audio Decoder/Processor for A2 and NICAM Television/Video Recorders |
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