參數(shù)資料
型號(hào): M52335SP
廠商: Mitsubishi Electric Corporation
英文描述: NTSC SYSTEM SINGLE-CHIP COLOR TV SIGNAL PROCESSOR
中文描述: NTSC系統(tǒng)的單芯片彩色電視信號(hào)處理器
文件頁(yè)數(shù): 13/29頁(yè)
文件大?。?/td> 276K
代理商: M52335SP
NTSC SYSTEM SINGLE-CHIP COLOR TV SIGNAL PROCESSOR
M52335SP
MITSUBISHI ICs (TV)
12
μ
s
8
μ
s
Horizontal output
at pin
20
Horizontal
Blanking Pulse
CL
R-Y
4.4V
58.75MHz
Output Waveform
at pin
50
1. Enter SG L. Measure output signal voltages 23A, 24A and 25A.
R-Y-N,
G-Y-N
Define the output phase of B-Y output (25A) as a reference.
Measure the phase differences of R-Y output (23A) and G-Y output
(24A).
Measurement notes
Note 1: For horizontal blanking pulse timing and width, adjust the
variable resistor of a one-shot multi-vibrator as shown
below.
f
PC L
, f
PC H
1. Enter SG M. Lower burst and chroma frequencies (fsb=fsc)
properly to set them free from pull-in.
2. Raise the frequencies gradually. Measure the input pull-in
frequency.
3. Measure the upper pull-in frequency in the same manner.
4. Represent a standard value by a difference from reference
value of 3.579545MHz.
f
PC
f
PC
= f
PC L
+f
PC H
(kHz)
CL
B-Y
, CL
R-Y
, CL
G-Y
1. Enter SG L of 0dB.
2. Measure a carrier leak at output pins
applying voltages of 4.5V and 5.1V to
,
and
.
when
and
24
23
25
36
21
SSY
Enter SG G into input F. Turn on S36. Measure the amplitude of
output signal
at scanning period.
SSC
Enter SG G into input E. Turn on S36. Measure the amplitude of
output signal 25A.
SSV
Measure the maximum value of output signal
S36.
when turning on
22
Decide 8
μ
s using the pin
M74LS221P. Also, decide 12
μ
s using the pin 7 variable
resistor.
variable resistor of TTL IC
Note 2: Coil adjustment
VCO coil
1. Set conditions of measurement to measurement parameter
"V
50D2
".
2. Enter CW with Fo=58.75MHz and Vi=90dB
μ
from input
pin A. Set S49 to 1.
3. Adjust the VCO coil so that the DC of AFT OUT (pin 50)
becomes 1/2Vcc (4.4V).
R-Y
B-Y
G-Y
B-Y
- N,
- N
R-Y
B-Y
G-Y
B-Y
Output signal voltage 23A
Output signal voltage 25A
- N =
- N =
2.
15
18
Output Waveform at pin
CL
G-Y
Output Waveform at pin
CL
B-Y
Output Waveform at pin
Output signal voltage 24A
Output signal voltage 25A
25
24
23
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