參數(shù)資料
型號： TB1261F
廠商： Toshiba Corporation
英文描述： TOSHIBA BiCMOS INTEGRATED CIRCUIT, SILICON MONOLITHIC
中文描述： 東芝的BiCMOS集成電路，硅單片
文件頁數(shù)： 15/66頁
文件大?。?/td> 1544K
代理商： TB1261F
TB1261F/TB1262F
2002-6-30 15 / 66
9,
BUS Description
WRITE MODE
PIF]
RF AGC
Data
00
01
3F
RF AGC delay point (Pin6-7)
PIF Fre
(00)
Data
Descriptions
000
45.75 MHz
001
39.5 MHz
010
38.9 MHz
011
38.0 MHz
100
34.2 MHz
101
33.9 MHz
Setting IF frequency according to tuner frequency. It
fixes the VCO frequency and AFT center frequency.
VCO-M (0)
[Sub; 0Dh D1 1 bit ]
Data
Descriptions
0
Absolute (duration of searching)
1
Relative (normal)
VCO tuning mode
TB1261 has two VCO tuning mode, which are
'Absolute' and 'relative'. The 'Absolute' mode refers
the crystal oscillation frequency 4.43MHz, the
'Relative' mode refers the IF input frequency, which is
tuned by AFT loop.
Set 'Relative' mode in normal receiving, and 'Absolute'
in channel searching. Even setting the 'Relative' mode,
the VCO
mode works as 'Absolute' in status of 'PIF Unlock'
automatically.
AFT
S
(0)
[Sub; 0Eh D7 1 bit ]
Data
Descriptions
0
Wide 400kHz
1
Narrow 100kHz
The range of the AFT-W read.
Over Mod(0)
[Sub; 0Eh D5 1 bit]
Data
Descriptions
0
Off (recommended)
1
On
on/off the over modulation switch
The measure circuit against over modulation stops the
APC in detecting the over modulation, in order to avoid
folding the detected signal. It may cause, however,
malfunction against the phase modulated RF signals.
So evaluate carefully in using this function.
(00)
[Sub; 0Ch D5~D0 6 bits ]
Descriptions
IF mute Stops Demodulation
65dB(uV)
105 dB(uV)
[Sub; 0Dh D7~D5 3 bits ]
PLL
Data
0
1
PLL Sensitivity. Set always '0; normal'
Buzz
(0)
Data
Descriptions
0
On (recommended)
1
Off
Nyquist Buzz Reducer SW.
PIF Det lev (4)
Data
Descriptions
0
Min
3
Max
PIF detected output level trimming
(V pp)
(0)
[ Sub; 0Ch D6 1 bit ]
Descriptions
Normal (recommended)
speed-up
（
x2
）
[ Sub; 0Eh D6 1 bit ]
[ Sub; 1Ah D5~D4 2 bits ]
2.0
2.1
2.2
2.3
2.4
0
1
BUS setting
Graph PIF det out level
2
3
P
L-SECAM (0), L-AG(0), FM Stop
[ Sub; 12h D1,D0 2 bits ]
D1
0
0
1
1
{L-SECAM}
Selecting the IF mode to the L-system or not.
This mode is available only for the TB1262. This bit
set to L-system as to;
- Turn the modulation polarity to positive
- Delay the AGC time constant (Peek AGC),
with switching the IF AGC filter to the capacitor
of DCNF pin (10uF) instead of IFAGC pin
(0.47uF) .
- SIF AM demodulation (Split carrier only)
with switching the SIF AGC filter to the
capacitor of IFAGC pin (0.47uF) .
{L-SECAM AGC speed up}
Speed up the AGC response for channel search
{FM Stop}
Stopping the FM demodulator to use in NICAM
demodulation.
D0
0
1
1
0
Descriptions
not LSECAM, not FM stop
L-SECAM
L-SECAM & AGC speed up
FM Stop
相關(guān)PDF資料
PDF描述
TB1262F TOSHIBA BiCMOS INTEGRATED CIRCUIT, SILICON MONOLITHIC
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TB10.0 Beldsol Magnet Wire, Approx. Spool Length: 6400'; Conductor Size AWG:36; No. Strands x Strand Size:Solid; Approval Categories:J-W-1177/9; MW 28-C (Single); Conductor Material:Copper RoHS Compliant: Yes
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參數(shù)描述
TB1262F 制造商:TOSHIBA 制造商全稱:Toshiba Semiconductor 功能描述:TOSHIBA BiCMOS INTEGRATED CIRCUIT, SILICON MONOLITHIC
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