參數(shù)資料
型號: STV8237
廠商: 意法半導體
英文描述: Digital Audio Decoder/Processor for A2 and NICAM Television/Video Recorders
中文描述: 數(shù)字音頻解碼器/處理器為A2和麗音電視/錄像機
文件頁數(shù): 70/149頁
文件大小: 2775K
代理商: STV8237
Register List
STV82x7
70/149
SRF
Channel 2 Symbol Tracking Loop Frequency
CRF2
Channel 2 Baseband PLL Demodulator Offset
CETH2
Channel 2 FM Carrier Level Threshold
Address: 36h
Type: R/W
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
SRF[7:0]
Bit Name
Reset
Function
SRF[7:0]
00000000
Displays in two’s complement format the frequency deviation between the incoming NICAM
bitstream and the quartz clocks. The maximum error is ±250 ppm.
Address: 37h
Type: R
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
CRF2[7:0]
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: 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)
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