Mitsubishi M52742ASP Datasheet
MITSUBISHI ICs (Monitor)
PRELIMINARY
Notice:This is not a final specification.
Some parametric limits are subject to change.
DESCRIPTION
M52742ASP is semiconductor integrated circuit for CRT display
monitor.
It includes OSD blanking, OSD mixing, retrace blanking, wide band
amplifer, brightness control, uniformity function.
Main/sub contrast and OSD adjust function can be controlled by I2C
bus.
FEATURES
• Frequency band width: RGB.............................200MHz (at -3dB)
Input :RGB.............................................................0.7VP-P (typ.)
OSD..........................................3VP-P minimum (positive)
BLK (for OSD)..........................3VP-P minimum (positive)
Retrace BLK.............................3VP-P minimum (positive)
Output :RGB..........................................................5.5VP-P (max.)
OSD..............................................................5VP-P (max.)
• Main contrast and sub contrast can be controlled by I
• Include internal and external pedestal clamp circuit
STRUCTURE
Bipolar silicon monolithic IC
APPLICATION
CRT display monitor
BUS CONTROLLED 3-CHANNEL VIDEO PREAMP FOR CRT DISPLAY MONITOR
OSD..............................................80MHz
2
C bus.
M52742ASP
PIN CONFIGURATION (TOP VIEW)
OSD BLK IN
INPUT(R)
VCC1(R)
OSD IN(R)
GND 1(R)
INPUT(G)
INPUT(SOG)
VCC1(G)
OSD IN(G)
GND 1(G)
INPUT(B)
VCC1(B)
OSD IN(B)
GND 1(B)
ABL IN
UNIFORMITY IN
VCC=5V
SOG SEP OUT
1
2
3
4
7
8
13
14
15 22
16 21
17
18 19
36
VCC2
OUTPUT(R)
35
EXT FEED BACK(R)
34
GND2
33
325
OUTPUT(G)
316
EXT FEED BACK(G)
MAIN BRIGHTNESS
30
M52742ASP
OUTPUT(B)
29
EXT FEED BACK(B)
289
2710
RETRACE BLK IN
2611
D/A OUT1
2512
D/A OUT2
D/A OUT3
24
D/A OUT4
23
GND(5V)
SDA
20
SCL
CLAMP PULSE IN
RECOMMENDED OPERATING CONDITION
Supply voltage range......................11.5 to 12.5V (V3, V8, V12, V36)
4.5 to 5.5V (V17)
Rated supply voltage..................................12.0V (V3, V8, V12, V36)
5.0V (V17)
MAJOR SPECIFICATION
Bus controlled 3ch video pre-amp with OSD mixing function and
retrace blanking function
Outline 36P4E
1
MITSUBISHI ICs (Monitor)
PRELIMINARY
Notice:This is not a final specification.
Some parametric limits are subject to change.
BLOCK DIAGRAM
OUTPUT (R)
35
27
RETRACE BLK IN
RETRACE
BLANKING
30
MAIN BRIGHTNESS
AMP
M52742ASP
BUS CONTROLLED 3-CHANNEL VIDEO PREAMP FOR CRT DISPLAY MONITOR
Vcc 5V
EXT FEED BACK (R)
34
CLAMP
F/B
OUTPUT (G)
32
RETRACE
AMP
BLANKING
EXT FEED BACK (G)
31
F/B
CLAMP
OUTPUT (B)
29
RETRACE
AMP
BLANKING
EXT FEED BACK (B)
28
F/B
CLAMP
(DIGITAL)
SDA
17
21
BUS
DAC
SCL
20
I/F
GND(5V)
22
26
2524
DAC OUTPUT
23
FOR CUT-OFF adj
4bit
OSD
LEVEL
B SUB CONT 8bit
R SUB CONT 8bit
OSD MIX
MAIN
CONTRAST
SUB
CONTRAST
CLAMP
2
4
(8bit)
SUB CONT
3
5
OSD MIX
MAIN
CONTRAST
SUB
CONTRAST
CLAMP
9
6
(8bit)
SUB CONT
8
10
OSD MIX
8bit
(8bit)
SUB CONT
14
12
Main
CONTRAST
15
MAIN
CONTRAST
SUB
CONTRAST
CLAMP
11
13
G SUB CONT 8bit
Sync On
GreenSep
7
1
OSD BLK IN
33
GND2
36
Vcc2=12V
1619
IN
UNIFORMITY
IN
CLAMP PULSE
18
INPUT (R)
OSD IN (R)
Vcc1 (R) 12V
GND 1(R)
INPUT (G)
OSD IN (G)
Vcc1 (G) 12V
GND 1(G)
INPUT (B)
OSD IN (B)
Vcc1 (B) 12V
GND 1(B)
INPUT (SOG)
CONTRAST (ABL) IN
SOG SEP OUT
2
MITSUBISHI ICs (Monitor)
PRELIMINARY
Notice:This is not a final specification.
Some parametric limits are subject to change.
ABSOLUTE MAXIMUM RATINGS (Ta=25°C)
Symbol Parameter Ratings Unit
VCC12 Supply voltage (pins 3,8,12,36) 13.0
VCC5 Supply voltage (pin 17) 6.0
Pd Power dissipation 2403 mW
Topr Ambient temperature -20 to +75 C
Tstg Storage temperature -40 to +150 C
Vopr12 Recommended supply 12 12.0 V
Vopr5 5.0 V
Recommended supply 5
ELECTRICAL CHARACTERISTICS (VCC=12V, 5V, Ta=25°C, unless otherwise noted)
Symbol Parameter
ICC1
ICC2
Vomax
Vimax
Gv
∆Gv
VC1
∆VC1
VC2
∆VC2
VC3
∆VC3
VSC1
∆VSC1
VSC2
∆VSC2
VSC3
∆VSC3
Circuit
current1
Circuit
current2
Output
dynamic range
Maximum
input
Maximum
gain
Relative maximum gain
Main contrast
control
characteristics1
Main contrast
control relative
characteristics1
Main contrast
control
characteristics2
Main contrast
control relative
characteristics2
Main contrast
control
characteristics3
Main contrast
control relative
characteristics3
Sub contrast
control
characteristics1
Sub contrast
control relative
characteristics1
Sub contrast
control
characteristics2
Sub contrast
control relative
characteristics2
Sub contrast
control
characteristics3
Sub contrast
control relative
characteristics3
BUS CONTROLLED 3-CHANNEL VIDEO PREAMP FOR CRT DISPLAY MONITOR
V
V
°
°
Test
point
2,6,11
(s)
RGB
in
OSD
BLK
IA a a a
IB a a a
b
OUT
SG2
b
IN
SG2
OUT
Variable
b
OUT
SG1
4,9,13
1
OSD
a a
a a
a a
Input
in
19
CP in27ReT
b
SG5
b
SG5
b
SG5
b
SG5
b
SG5
7
SOG
in
BLK
a a a 4.0 5.0
a a a 4.0 5.0 - 18 25 mA
a a a
a a a 2.0 5.0
a a a 2.0 5.0
- - - - - - - - - - - 0.8 1.0 1.2 -
OUT
b
SG1
a a
b
a a a 2.0 5.0
SG5
- - - - - - - - - - - 0.8 1.0 1.2 -
OUT
b
SG1
a a
b
a a a 2.0 5.0
SG5
- - - - - - - - - - - 0.8 1.0 1.2 -
OUT
b
SG1
a a
b
a a a 2.0 5.0
SG5
- - - - - - - - - - - 0.8 1.0 1.2 -
OUT
b
SG1
a a
b
a a a 2.0 5.0
SG5
- - - - - - - - - - - - - - 0.8 1.0 1.2 -
OUT
b
SG1
a a
b
a a a 2.0 5.0
SG5
- - - - - - - - - - - - - - 0.8 1.0 1.2 -
OUT
b
SG1
a a
b
a a a 2.0 5.0
SG5
- - - - - - - - - - - - - - 0.8 1.0 1.2 -
16
UNI
in
CTL
voltage
00H
15
30
Bright
Vari
able
Main
ABL
cont
FFH
255
5.0 6.0 8.0 - VP-P
64H
100
FFH
255
C8H
200
64H
100
14H
20
FFH
255
FFH
255
FFH
255
BUS CTL (H) Limits
01H
02H
03H
Sub
cont
FFH
C8H
64H
255
200
100
2
04H
Sub
OSD
cont
3
FFH
00H000H0FFH
255
C8H
200
64H
100
20
Sub
cont
1
FFH
255
C8H
200
64H
100
14H2014H2014H
M52742ASP
05H
06H
07H
BLK
D/A
Adj
D/A
Adj
OUT
OUT
1
2
FFH
255
255
08H
OUT
FFH
255
0BH
09H
INT
D/A
D/A
EXT
Min. Typ. Max.
OUT
3
4
FFH
00H
- 126 146 mA
255
0
1.6 - - VP-P
16.5 17.7 19.4 dB
15.5 17.0 18.5 dB
9.5 11.0 12.5 dB
0.2 0.4 0.6
16.0 17.5 19.0 dB
12.0 13.5 15.0 dB
1.5 1.9 2.2
Unit
V
V
P-P
P-P
3
MITSUBISHI ICs (Monitor)
PRELIMINARY
Notice:This is not a final specification.
Some parametric limits are subject to change.
ELECTRICAL CHARACTERISTICS (cont.)
Symbol Parameter
VMSC
∆VMSC
ABL1
∆ABL1
ABL2
∆ABL2
VB1
∆VB1
VB2
∆VB2
VB3
∆VB3
FC1
∆FC1
FC1’
∆FC1’
FC2
∆FC2
C.T.1
C.T.1’
C.T.2
C.T.2’
C.T.3
C.T.3’
Main/sub
contrast control
characteristics
Main/sub contrast
control relative
characteristics
ABL control
characteristics1
ABL control
relative
characteristics1
ABL control
characteristics2
ABL control
relative
characteristics2
Brightness
control
characteristics1
Brightness
control relative
characteristics1
Brightness
control
characteristics2
Brightness
control relative
characteristics2
Brightness
control
characteristics3
Brightness
control relative
characteristics3
Frequency
characteristics1
(f=50MHz)
Frequency relative
characteristics1
(f=50MHz)
Frequency
characteristics1
(f=200MHz)
Frequency relative
characteristics1
(f=200MHz)
Frequency
characteristics2
(f=200MHz)
Frequency relative
characteristics2
(f=200MHz)
Crosstalk 1
(f=50MHz)
Crosstalk 1
(f=200MHz)
Crosstalk 2
(f=50MHz)
Crosstalk 2
(f=200MHz)
Crosstalk 3
(f=50MHz)
Crosstalk 3
(f=200MHz)
BUS CONTROLLED 3-CHANNEL VIDEO PREAMP FOR CRT DISPLAY MONITOR
Test
point
2,6,11
(s)
OUT
RGB
in
b
SG1
OSD
BLK
- - - - - - - - - - - - - - 0.8 1.0 1.2 b
OUT
SG1
- - - - - - - - - - 0.8 1.0 1.2 b
OUT
SG1
- - - - - - - - - - 0.8 1.0 1.2 -
OUT a a a
- - - - - - - - - - -0.3 0 0.3 V
OUT a a a
- - - - - - - - - - -0.3 0 0.3 V
OUT a a a
- - - - - - - - - - -0.3 0 0.3 V
b
OUT
SG3
- - - - - - - - - - - -1.0 0 1.0 dB
b
OUT
SG3
- - - - - - - - -1.0 0 1.0 dB
b
OUT
SG3
- - - - - - - - - - -1.0 0 1.0 dB
2bSG3
OUT(29)
6a
OUT(32)
11a
2bSG3
OUT(29)
6a
OUT(32)
11a
2a
OUT(29)
6bSG3
OUT(35)
11a
2a
OUT(29)
6bSG3
OUT(35)
11a
2a
OUT(32)
6a
OUT(35)
11bSG3
2a
OUT(32)
6a
OUT(35)
11bSG3
4,9,13
1
OSD
a a
a a
a a
a a
a a
a a
a a
a a
a a
a a
a a
a a
Input
in
CP in27ReT
SG5
SG5
SG5
SG5
SG5
SG5
M52742ASP
CTL
voltage
19
b
b
b
b
b
b
a
5V
a
5V
a
5V
a
5V
a
5V
a
5V
a
5V
a
5V
a
5V
7
16
BLK
SOG
in
UNI
in
30
Bright
a a a 2.0 5.0
a a a 2.0 4.0
a a a 2.0 2.0 2.6 3.1 3.6 VP-P
a a a 4.0 5.0 3.3 3.7 4.1 V
a a a 2.0 5.0 1.5 1.8 2.1 V
a a a 1.0 5.0 0.7 0.9 1.1 V
a a a
a a a
a a a
a a a
a a a
a a a
a a a
a a a
a a a
Vari
able
Vari
able
Vari
able
Vari
able
Vari
able
Vari
able
Vari
able
Vari
able
Vari
able
00H
15
Main
ABL
cont
C8H
200
FFH
255
Va
5.0
ria
ble
Va
5.0
ria
ble
5.0 -3.0 3.0 5.0 dB
FFH
5.0
255
5.0 - -15 -10 dB
5.0 - -25 -20 dB
5.0 - -15 -10 dB
5.0 - -25 -20 dB
5.0 - -15 -10 dB
BUS CTL (H) Limits
01H
02H
03H
04H
05H
06H
07H
08H
Sub
Sub
Sub
OSD
BLK
cont
cont
cont
1
2
3
C8H
C8H
C8H
200
200
200
FFH
FFH
FFH
255
255
255
FFH
FFH
FFH
255
255
255
Adj
Adj
00H000H0FFH
OUT
D/A
255
09H
D/A
D/A
D/A
OUT
OUT
1
OUT
2
3
4
FFH
FFH
FFH
255
255
255
0BH
INT
EXT
Min. Typ. Max.
3.5 4.1 4.7 VP-P
4.7 5.0 5.8 VP-P
-2.0 0 2.5 dB
00H
-3.0 0 3.0 dB
0
- -25 -20 dB
Unit
4
MITSUBISHI ICs (Monitor)
PRELIMINARY
Notice:This is not a final specification.
Some parametric limits are subject to change.
ELECTRICAL CHARACTERISTICS (cont.)
Symbol Parameter
Tr
Pulse
characteristics1
(4VP-P)
Pulse
characteristics2
(4VP-P)
Relative pulse
characteristics1
Relative pulse
characteristics2
Clamp pulse
threshold
voltage
Clamp pulse
minimum
width
OSD pulse
characteristics1
OSD pulse
characteristics2
OSD adjust control
characteristics1
OSD adjust control
relative
characteristics1
OSD adjust control
characteristics2
OSD adjust control
relative
characteristics2
OSD adjust control
characteristics3
OSD adjust control
relative
characteristics3
OSD input
threshold
voltage
OSD BLK input
threshold
voltage
Retrace BLK
characteristics1
Retrace BLK
characteristics2
Retrace BLK
characteristics3
Retrace BLK
input threshold
voltage
SOG input
maximum
noise voltage
SOG
minimum
input voltage
Sync output
hi level
Sync output
lo level
Sync output
delay time1
Tr
Tf
Tr
∆
∆
VthCP
WCP
OTr
OTf
Oaj1
∆Oaj1
Oaj2
∆Oaj2
OBLK
∆OBLK
VthOSD
VthBLK
HBLK1
HBLK2
HBLK3
VthRET
SS-NV
SS-SV
VSH
VSL
TDS-F
BUS CONTROLLED 3-CHANNEL VIDEO PREAMP FOR CRT DISPLAY MONITOR
Test
point
2,6,11
(s)
OUT
OUT
OUT
OUT
OUT
OUT
RGB
in
b
SG1
b
SG1
b
SG1
b
SG1
b
SG1
b
SG1
OSD
BLK
OUT a a
OUT a a
OUT a
SG6bSG6
- - - - - - - - - - - 0.8 1.0 1.2 -
OUT a
SG6bSG6
- - - - - - - - - - - 0.8 1.0 1.2 -
OUT a
SG6
- - - - - - - - - - - -0.2 0 0.2 VP-P
OUT a
OUT
b
SG1
SG6
SG6
Variable
OUT a a a
OUT a a a
OUT a a a
OUT a a a
SonG IN
Sync OUT
Sync OUT
Sync OUT
Sync OUT
Sync OUT
a a a a a
SonG IN
a a a a a
a a a a a
a a a a a
a a a a a
Input
4,9,13
1
OSD
CP in27ReT
in
a a
a a
a a
a a
a a
a a a a a 2.0 5.0
SG5
SG5
SG5
SG5
SG5
Variable
SG5
Variable
b
SG6
SG5
b
SG6
SG5
b
SG5
b
SG5
b
a
SG5
b
b
SG6
SG5
Variable
b
a
SG5
SG5
SG5
SG5
SG5
M52742ASP
CTL
voltage
19
b
b
b
b
7
SOG
in
BLK
a a a
a a a
a a a
a a a
b
a a a 2.0 5.0
16
UNI
in
30
Bri-
ght
Vari
able
Vari
able
Vari
able
Vari
able
15
ABL
5.0
5.0
5.0
5.0
00H
Main
cont
Va
ria
ble
Va
ria
ble
Vari
able
Vari
able
FFH
255
b
b
a a a 2.0 5.0 - 3.0 6.0 ns
b
a a a 2.0 5.0
b
a a a 2.0 5.0
b
a a a 2.0 5.0
b
a a a 2.0 5.0
b
a a a 2.0 5.0
b
a a a 2.0 5.0
b
b
a a 2.0 5.0
SG7
b
b
a a 2.0 5.0
SG7
b
b
a a 2.0 5.0
SG7
b
b
a a 2.0 5.0
SG7
Variable
b
SG4
Variable
b
SG4
Variable
b
SG4
b
SG4
b
SG4
a 2.0 5.0 - - 0.02 VP-P
a 2.0 5.0 0.2 0.3 - VP-P
a 2.0 5.0 4.5 4.9 5.0 V
a 2.0 5.0 0 0.3 0.6 V
a 2.0 5.0 0 60 90 ns
BUS CTL (H) Limits
01H
02H
03H
04H
05H
06H
07H
08H
Sub
cont
Sub
Sub
OSD
BLK
cont
cont
1
2
3
D/A
Adj
Adj
OUT
1
08H
8
08H
8
0FH
15
08H
8
00H
0
08H
8
00H
0
0FH
15
06H
6
00H
0
08H
8
D/A
OUT
09H
D/A
D/A
OUT
OUT
2
3
0BH
INT
EXT
Min. Typ. Max.
4
- 1.7 - ns
- 2.2 - ns
-0.8 0 0.8 ns
-0.8 0 0.8 ns
1.0 1.5 2.0 V
0.2 0.5 -
- 3.0 6.0 ns
4.6 5.4 6.2 VP-P
2.8 3.3 3.8 VP-P
0 -0.1 -0.3 VP-P
2.2 2.7 3.2 V
2.2 2.7 3.2 V
1.7 2.0 2.3 V
0.7 1.0 1.3 V
0.1 0.4 0.7 V
1.0 1.5 2.0 V
Unit
µs
5
MITSUBISHI ICs (Monitor)
PRELIMINARY
Notice:This is not a final specification.
Some parametric limits are subject to change.
ELECTRICAL CHARACTERISTICS (cont.)
Symbol Parameter
TDS-R
VOH
VOL
DNL
UNI1
UNI2
1A-
1A+
Sync output
delay time2
D/A H output
voltage
D/A L output
voltage
D/A
nonlinearity
Uniformity
characteristics1
Uniformity
characteristics2
D/A input
current range
D/A output
current range
BUS CONTROLLED 3-CHANNEL VIDEO PREAMP FOR CRT DISPLAY MONITOR
Test
point
(s)
Sync OUT
D/A
OUT
D/A
OUT
D/A
OUT
OUT
OUT
D/A
OUT
D/A
OUT
2,6,11
OSD
RGB
BLK
in
a a a a a
a a a a a a a 2.0 5.0
a a a a a a a 2.0 5.0
a a a a a a a 2.0 5.0
b
SG1
b
SG1
a a a
a a a
4,9,13
1
a a
a a
OSD
in
Input
CP in27ReT
SG5
SG5
19
b
b
a
a
7
SOG
in
BLK
b
SG4
a a 5.0
a a 5.0
a a a 2.0 5.0
a a a
M52742ASP
CTL
voltage
16
UNI
in
30
Bright
15
ABL
00H
Main
cont
a 2.0 5.0 0 60 90 ns
FFH
255
b
SG6
2.5V
b
SG6
1.25V
2.0
2.0
C8H
200
00H
0
2.0 5.0
BUS CTL (H) Limits
01H
02H
03H
04H
05H
06H
07H
08H
Sub
Sub
Sub
OSD
BLK
cont
cont
cont
1
2
3
FFH
FFH
FFH
255
255
255
C8H
C8H
C8H
200
200
200
00H
00H
00H
0
0
0
Adj
Adj
00H000H0FFH
00H
00H
0
0
D/A
OUT
255
00H000H000H000H
Vari
able
FFH
255
00H
0
09H
D/A
D/A
D/A
OUT
OUT
FFH
255
Vari
able
FFH
255
00H
0
OUT
2
3
4
FFH
FFH
255
255
0
Vari
Vari
able
able
FFH
FFH
255
255
00H
00H
0
0
1
0BH
INT
EXT
Min. Typ. Max.
00H
4.5 5.0 5.5 VDC
0
0 0.5 1.0 VDC
-1.0 - 1.0 LSB
7 10 13 %
3.5 5 6.5 %
00H
0
0.18
- -
-
-
1.0
Unit
mA
mA
ELECTRICAL CHARACTERISTICS TEST METHOD
ICC1 Circuit current1
Measuring conditions are as listed in supplementary Table.
Measured with a current meter at test point IA.
ICC2 Circuit current2
Measuring conditions are as listed in supplementary Table.
Measured with a current meter at test point IB.
Vomax Output dynamic range
Decrease V30 gradually, and measure the voltage when the
waveform output is distorted. The voltage is called VOL.
Next, increase V30 gradually, and measure the voltage when the
top of waveform output is distorted. The voltage is called VOH.
Voltage Vomax is calculated by the equation below:
Vomax = VOH-VOL
(V)
VOH
5.0
Waveform output
VOL
0.0
Gv Maximum gain
Input SG1, and read the amplitude output at OUT (29, 32, 35). The
amplitude is called VOUT (29, 32, 35). Maximum gain GV is
calculated by the equation below:
VOUT
GV=20Log
0.7
(dB)
∆Gv Relative maximum gain
Relative maximum gain DGV is calculated by the equation bellow:
∆GV= VOUT (29)/VOUT (32),
VOUT (32)/VOUT (35),
VOUT (35)/VOUT (29)
VC1 Main contrast control characteristics1
Measuring the amplitude output at OUT (29, 32, 35). The
measured value is called VOUT (29, 32, 35). Main contrast control
characterics VC1 is calculated by the equation bellow:
VOUT
VC1=20Log
0.7
(dB)
∆VC1 Main contrast control relative characteristics1
Relative characteristics ∆VC1 is calculated by the equation bellow:
∆VC1=VOUT (29)/VOUT (32),
VOUT (32)/VOUT (35),
VOUT (35)/VOUT (29)
Vimax Maximum input
Increase the input signal (SG2) amplitude gradually, starting from
700mVP-P. Measure the amplitude of the input signal when the
output signal starts becoming distorted.
VC2 Main contrast control characteristics2
Measuring condition and procedure are the same as described in
VC1.
∆VC2 Main contrast control relative characteristics2
Measuring condition and procedure are the same as described in
∆VC1.
6
MITSUBISHI ICs (Monitor)
PRELIMINARY
Notice:This is not a final specification.
Some parametric limits are subject to change.
VC3 Main contrast control characteristics3
Measuring the amplitude output at OUT (29, 32, 35).
The measured value is called VOUT (29, 32, 35).
∆VC3 Main contrast control relative characteristics3
Measuring condition and procedure are the same as described in
∆VC1.
VSC1 Sub contrast control characteristics1
Measure the amplitude output at OUT (29, 32, 35). The measured
value is called VOUT (29, 32, 35). Sub contrast control
characteristics VSC1 is calculated by the equation below:
VSC1=20Log
∆VSC1 Sub contrast control relative characteristics1
Relative characteristics ∆VSC1 is calculated by the equation below:
∆VSC1=VOUT (29)/VOUT (32),
VSC2 Sub contrast control characteristics2
Measuring condition and procedure are the same as described in
VSC1.
∆VSC2 Sub contrast control relative characteristics2
Measuring condition and procedure are the same as described in
∆VSC1.
VSC3 Sub contrast control characteristics3
Measuring the amplitude output at OUT (29, 32, 35).
The measured value is called VSC3
∆VSC3 Sub contrast control relative characteristics3
Measuring condition and procedure are the same as described in
∆VSC1.
VMSC Main/sub contrast control characteristics
Measure the amplitude output at OUT (29, 32, 35). The measured
value is called VMSC
∆VMSC Main/sub contrast control relative characteristics
Relative characteristics VMSC is calculated by the equation
below:
VMSC = VOUT (29)/VOUT (32),
∆
BUS CONTROLLED 3-CHANNEL VIDEO PREAMP FOR CRT DISPLAY MONITOR
VOUT
(dB)
0.7
VOUT (32)/VOUT (35),
VOUT (35)/VOUT (29).
∆
VOUT (32)/VOUT (35),
VOUT (35)/VOUT (29)
M52742ASP
ABL1 ABL control characteristics1
Measure the amplitude output at OUT (29, 32, 35). The measured
value is called VOUT (29, 32, 35), and is treated as ABL1.
∆ABL1 ABL control relative characteristics1
Relative characteristics ∆ABL1 is calculated by the equation below:
∆ABL1= VOUT (29)/VOUT (32),
VOUT (32)/VOUT (35),
VOUT (35)/VOUT (29)
ABL2 ABL control characteristics2
Measuring condition and procedure are the same as described in
ABL1.
∆ABL2 ABL control relative characteristics2
Measuring condition and procedure are the same as described in
∆ABL1.
VB1 Brightness control characteristics1
Measure the DC voltage at OUT (29, 32, 35) with a voltmeter. The
measured value is called VOUT (29, 32, 35), and is treated as VB1.
∆VB1 Brightness control relative characteristics1
Relative characteristics ∆VB1 is calculated by the difference in the
output between the channels.
∆VB1= VOUT (29) -VOUT (32),
VOUT (32) -VOUT (35),
VOUT (35) -VOUT (29)
VB2 Brightness control characteristics2
Measuring condition and procedure are the same as described in
VB1.
∆VB2 Brightness control relative characteristics2
Measuring condition and procedure are the same as described in
∆VB1.
VB3 Brightness control characteristics3
Measuring condition and procedure are the same as described in
VB1.
∆VB3 Brightness control relative characteristics3
Measuring condition and procedure are the same as described in
∆VB1.
7
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