參數(shù)資料
型號(hào)： M52778SP
廠商： Mitsubishi Electric Corporation
英文描述： VIF, SIF, VIDEO, CHROMA, DEFLECTION FOR PAL/NTSC
中文描述： 資料表格，應(yīng)力強(qiáng)度因子，視頻，撓度色度用于PAL / NTSC制式
文件頁(yè)數(shù)： 18/37頁(yè)
文件大?。?/td> 310K
代理商： M52778SP
MITSUBISHI ICs (TV)
M52778SP
VIF, SIF, VIDEO, CHROMA, DEFLECTION FOR PAL/NTSC
18
VBLKW Vertical blanking width
AVER5 50/60 identification 5, AVER1 50/60 identification 1
AVER2 50/60 identification 2, AVER3 50/60 identification 3,
AVER4 50/60 identification 4
Confirm that the frequency of output at pin 18 is the same at each
input frequency (pull-in state). Also, confirm the state of the bus
read mode (D7).
WVSS Vertical sync.detection minimum width
Change the input pulse width of SGd and measure the input pulse
width at the moment when the output signal at pin 18 and the input
signal at pin 39 are pulled in.
Rsi1 Vertical ramp size
Measure the pin18 amplitude.
Rs1 Vertical ramp size control range
1. Measure the pin 18 amplitude. (size data : max and min)
2.
Rpo1 Vertical ramp position control range
1. Measure the pin 18 top voltage. ( position data : max and min )
2. Rpo1=pin 18 posi max - pin 18 posi min (mv)
Rgc Vertical position center adjustment
1. Adjust the position bus data so that the output DC bias current at
pin18 and pin 19 should be equal.
2. Specify this position bus data adjusted above.
Rgr Vertical ramp out pulse width (PAL)
Note: The timing and pulse width of the horizontal blanking pulse
should be as shown in the following figure by adjusting the variable
resistor of the single shot multi vibrator.
The variable resistor at pin 15 of the TTL IC, M74LS221P, is used to
fix the timing at 8
μ
s and that at pin 7 is used to fix the pulse width at
12
μ
s.
Coil adjustment
VCO COIL
1. Set the test conditions as shown in the parameter V14.
2. Input CW (fo=38.9MHz, Vi=90dB
μ
) to input pin A.
3. Set the DC voltage at pin 1 (AFT OUT) to 1/2Vcc (4.0V) by
adjusting VCO coil.
Note: VCO coil should always be adjusted as above before using
this IC.
GND
Output waveform at
pins 21, 22 and 23
M
Pin18 size max-pin18 size min
Rsi1
Rs1=
×
100(%)
Measure the output pulse width
at pin 18, when 43k
at pin 10
is connected to 8V (V
CC
).
PIN 13
Horizontal
output
Horizontal
blanking pulse
8
μ
s
12
μ
s
4.0V
38.9MHz
Frequency
Voltage
PIN 1 Output waveform
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