ta1310ang TOSHIBA Semiconductor CORPORATION, ta1310ang Datasheet - Page 44

• Manufacturer Part Number: ta1310ang
• Description: Ntsc Video, Chroma, Deflection, And Distortion Compensation Ic With Yuv Interface And Acb
• Manufacturer: TOSHIBA Semiconductor CORPORATION

NOTE
Note 1: When testing, see the picture sharpness test circuit diagram. First turn ACB mode off (bus control).
Note 2: Ensure the composite signal is always input to pin 38 (SYNC IN).
P
P
P
20
21
22
VSM Peak Frequency
VSM Gain
VSM Muting Threshold
Voltage
ITEM
SW
A
A
A
54
SW MODE
SW
B
B
B
55
OPEN
OPEN
OPEN
SW
56
1)
2)
3)
4)
1)
2)
3)
4)
5)
6)
1)
2)
3)
Set the bus control data to the preset value.
Set SW
Set the #54 amplitude to 100 mV
Observe TP1 (VSMOUT) with a spectrum analyzer and seek the peak point frequency FVSM.
Set the bus control data to the preset value.
Set SW
Set the amplitude of #54 to 100 mV
When the VSM gain is on (0), measure the TP1 (VSMOUT) amplitude V
Next, measure the TP1 (VSMOUT) amplitude V
Calculate G
G
G
Repeat steps 1) to 3) of P
Connect the external power supply (PS) to #10 and increase the voltage from 0.5 V. Read the PS voltage V
when the TP1 (VSMOUT) amplitude disappears, as shown in the following diagram.
Set SW
(VSMOUT) amplitude disappears as shown in the following diagram, read the PS voltage V
VSM0
VSM1
54
54
[dB] = 20 × ℓog (V
[dB] = 20 × ℓog (V
6
to open, connect #6 to an external power supply, increase the voltage from 1.5 V. When the TP1
to A, turn the Y mute off, and input a sweep signal to TP54.
to A, turn the Y mute off (0), and input the FVSM sine wave (see P
VSM0
(TEST CONDITIONS V
and G
VSM1
VSM0
VSM1
21
.
44
by the following formulas.
÷ 0.1)
÷ 0.1)
p-p
p-p.
.
CC
MEASUREMENT METHOD
= 9 V / 5 V, Ta = 25 ± 3°C)
VSM1
(V
p-p
) when the VSM gain is off (1).
VSM0
20
(V
above) to TP54.
p-p
).
VM6
.
VM10
TA1310ANG
2005-09-20