參數(shù)資料
型號(hào)： TB1230AN
元件分類： 消費(fèi)家電
英文描述： SPECIALTY CONSUMER CIRCUIT, PDIP56
封裝： 0.600 INCH, 1.78 MM PITCH, SHRINK, PLASTIC, DIP-56
文件頁(yè)數(shù)： 29/90頁(yè)
文件大?。?/td> 1333K
代理商： TB1230AN
TB1230AN
2001-09-04
35
TEST CONDITION
VIDEO SECTION
TEST CONDITION (Unless otherwise specified : H, RGB VCC = 9V ; VDD, Fsc VDD, Y / C VCC = 5V ; Ta = 25±3°C)
SW MODE
SUB-ADDRESS & BUS DATA
NOTE
ITEM
S39
S42
S44
S45
S51
04H
08H
0FH
10H
13H
14H
MEASURING METHOD
Y1
Y Input Pedestal
Clamping Voltage
A
C
B
A
20H
04H
80H
00H
BAH
03H
(1) Short circuit pin 45 (Y1 IN) in AC coupling.
(2) Input synchronizing signal to pin 51 (SYNC IN).
(3) Measure DC voltage at pin 45, and express the measurement result as VYcIp.
Y2
Chroma Trap
Frequency
↑
A
B
↑
(1) Set the 358 TRAP mode to AUTO by setting the bus data.
(2) Set the bus data so that chroma trap is ON and f0 is 0.
(3) Input TG7 sine wave signal whose frequency is 3.58MHz (NTSC) and video
amplitude is 0.5V to pin 45 (Y1 IN).
(4) While observing waveform at pin 37 37 (Y1out), find a frequency with minimum
amplitude of the waveform. The obtained frequency shall be expressed as fIr3.
(5) Change the frequency of the signal 1 to 4.43MHz (PAL) and perform the same
measurement as the preceding step 4. The obtained frequency shall be
expressed as fIr4.
Y3
Chroma Trap
Attenuation
(3.58MHz)
↑
Vari-
able
Vari-
able
Vari-
able
↑
(1) Set the 358 TRAP mode to AUTO by setting bus data.
(2) Set the bus data so that Q of chroma trap is 1.5.
(3) Set the bus data so that f0 of chroma trap is 0.
(4) Input TG7 sine wave signal whose frequency is 3.58MHz (NTSC) and video
amplitude is 0.5V to pin 45 (Y1 IN).
(5) While turning on and off the chroma trap by controlling the bus, measure
chroma amplitude (VTon) at pin 37 (Y1out) with the chroma trap being turned
on and measure chroma amplitude (VToff) at pin 37 (Y1out) with the chroma
trap being turned off.
Gtr = 20og (VToff / VTon)
(6) Change f0 of the chroma trap to 100kHz, 50kHz, 0 and +50kHz, and
perform the same measurement as the preceding steps 4 and 5 with the
respective f0 settings.
(7) Change Q of the chroma trap to 1, 1.5, 2 and 2.5, and perform the same
measurement as the preceding steps 4 through 6. The maximum Gtr shall be
expressed as Gtr3a.
(8) Set the 358 TRAP mode to the forces 358 mode by setting bus data, and
perform the same measurement as the preceding steps 2 through 7 (Gtr3f).
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