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TB1227CNG Datasheet(PDF) 88 Page - Toshiba Semiconductor

Part No. TB1227CNG
Description  VIDEO, CHROMA AND SYNCHRONIZING SIGNALS PROCESSING IC FOR PAL / NTSC / SECAM SYSTEM COLOR TV
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Maker  TOSHIBA [Toshiba Semiconductor]
Homepage  http://www.semicon.toshiba.co.jp/eng
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TB1227CNG Datasheet(HTML) 88 Page - Toshiba Semiconductor

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TB1227CNG
2004-05-24
88
SECAM SECTION
TEST CONDITION (Unless otherwise specified : H, RGB VCC = 9V ; VDD, Fsc VDD, Y / C VCC = 5V ; Ta = 25±3°C)
BUS : TEST MODE
BUS : NORMAL CONTROL MODE
S
02H
07H
0FH
10H
1FH
NOTE
ITEM
26
D4 D3 D2 D7 D5 D4 D4 D7 D5 D4 D3 D2 D1 D0 D7 D6 D5 D4 D3 D2 D1
D0
MEASURING METHOD
S1
Bell Monitor Output
Amplitude
ON
0
1
0
0
0
0
1
0
0
0
0
0
0
0
1
0
0
0
0
0
0
1
(1) Input 200mVp-p (R-Y ID), 75% chroma color
bar signal (SECAM system) to pin 42.
(2) Measure amplitude of R-Y ID output of pin 36
as ebmo.
S2
Bell Filter fo
(1) While supplying 20mVp-p CW sweep signal
from network analyzer to pin 42 and monitoring
output signal of pin 36 with the network
analyzer, measure frequency having maximum
gain as foBEL of the bell frequency
characteristic.
(2) Find difference between foBEL and 4.286MHz
as foB-C.
S3
Bell Filter fo Variable
Range
Vari-
able
Vari-
able
(1) The same procedure as the steps 1 and 2 of
the Note S2.
(2) Measure foBEL in different condition that SUB
(IF) D1D0 = (00) or (11), and find difference of
each measurement result from 4.286MHz as
foB-L or foB-H.
S4
Bell Filter Q
01
(1) The same procedure as the step 1 of the Note
S2.
(2) While monitoring output signal of pin 36 with
network analyzer, measure Q of bell frequency
characteristic as QBEL.
QBEL = (QMAX −3dB band width) / FoBEL
S5
Color Difference
Output Amplitude
OFF —
— —
0
S6
Color Difference
Relative Amplitude
— —
(1) Input 200mVp-p (R-Y ID), 75% chroma color
bar signal (SECAM system) to pin 42.
(2) Measure color difference levels VRS and VBS
with signals of pin 35 and pin 36.
(3) Calculate relative amplitude from VRS / VBS.


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