參數(shù)資料
型號: TB1254N
元件分類: 消費家電
英文描述: SPECIALTY CONSUMER CIRCUIT, PDIP56
封裝: 0.600 INCH, PLASTIC, SDIP-56
文件頁數(shù): 6/58頁
文件大?。?/td> 526K
代理商: TB1254N
Ver3.7
00/01/28 14
IIC BUS CONROL FUNCTION
WRITE MODE
PIF STAGE
ITEMS
BITS
DESCRIPTIONS
PRESET
RF AGC
Sub; 0E h
6
RF AGC delay point (Pin6-7)
01:
65 dB(V)
3F:
100 dB(V)
00:
IF MUTE
Stops Demodulation
00000
:Mute
IF Freq.
Sub; 0A h
3
Setting IF frequency for digital AFT count down
000:
58.75 MHz
001:
45.75 MHz
010:
39.5 MHz
011:
38.9 MHz
100:
38.0 MHz
101:
34.47 MHz
110:
33.95 MHz
111:
34.2 MHz
000
:58.75MHz
AFT Mute
Sub; 0D h
1
AFT Mute Switch
0:
normal
1:
AFT defeat (mute)
0:normal
AFT sens.
Sub; 0D h
1
AFT sensitivity
0:
100kHz/v
1:
25kHz/V
0:100kHz
Over mod SW
Sub; 0D h
1
on/off the over modulation switch
0:
off
1:
on
0:off
Q det. Gain
Sub; 0D h
Q detector gain
0:
high
1:
low
0:high
L-SECAM Mode
Sub; 09 h
1
L SECAM
0:
Not L-SECAM
1:
L-SECAM
turn the polarity for TV Det Out for positive modulation
Delay the AGC time constant (Peek AGC)
SIF AM demodulation
0:Not
L-SECAM
AGC
Speed
Sub; 09 h
1
Speed up the AGC sense for channel serch
0: normal
1: speed-up Ch Serch
0:normal
VCO Center
Sub; 0C h
1
VCO center SW
0: normal
1: Center
In adjusting a tank coil, set this bit to 1.
0: normal
VCO Adj. Request
Sub; 0C h
1
VCO adjust trigger
0: normal
1: VCO adjust trigger
The PIF VCO starts adjusting after requested.
While adjusting, the picture is blanked
0: normal
VCO Adj. Stop
Sub; 0C h
1
Stop the readjustment on detecting the loosing adjustment
0: normal
1: stop self adjustment
“VCO Adj request” prier it
0: normal
SIF STAGE
ITEMS
BITS
DESCRIPTIONS
PRESET
SIF Freq.
Sub; 0A h
2
SIF Frequency
00: 5.5MHz
01: 6.0MHz
10: 6.5MHz
11: 4.5MHz
Set the SIF frequency for;
Select the SIF FM demodulator band
select the de-emphasis speed
Set the ref.freq. for single MHz beet up if using
00:5.5MHz
SIF 574
Sub; 0C h
1
Set the SIF freq. to 5.74MHz for IGR Bilingual.
It sets the reference freq. for beet up the 5.74MHz to 6.5MHz.
0:
other frequencies
1:
5.74MHz
0:other
frequencies
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