m52745sp Mitsumi Electronics, Corp., m52745sp Datasheet - Page 8

• Manufacturer Part Number: m52745sp
• Description: Bus Controlled 3-channel Video Preamp For Crt Display Monitor
• Manufacturer: Mitsumi Electronics, Corp.

F
First, SG3 to 1MHz is as input signal. Input a resister that is about
2kΩ to offer the voltage at input pins (6, 9, 11) in order that the bot-
tom of input signal is 2.5V. Control the main contrast in order that
the amplitude of sine wave output is 4.0V
in order that the bottom of sine wave output is 2.0V
way, measure the output amplitude when SG3 to 50MHz is as input
signal. The measured value is called VOUT (24, 28, 31). Frequency
characteristics F
Relative characteristics ∆F
output between the channels.
F
Measuring condition and procedure are the same as described in
table, expect SG3 to 150MHz.
Relative characteristics ∆F
output between the channels.
F
SG3 to 1MHz is as input signal. Control the main contrast in order
that the amplitude of sine wave output is 1.0V
measure the output amplitude when SG3 to 150MHz is as input
signal.
The measured value is called VOUT (24, 28, 31). Frequency
characteristics F
∆F
Relative characteristics F
output between the channels.
C.T.1 Crosstalk1 (f=50MHz)
Input SG3 (50MHz) to pin2 only, and then measure the waveform
amplitude output at OUT (24, 28, 31). The measured value is called
VOUT (24, 28, 31). Crosstalk C.T.1 is calculated by the equation
below:
C.T.1' Crosstalk1 (f=150MHz)
Measuring condition and procedure are the same as described in
C.T.1, expect SG3 to 150MHz.
∆F
∆F
F
F
C1
C1
C2
C1
C2
C1
C1
C2
' Frequency characteristics1 (f=150MHz)
=20log
=20log
Frequency characteristics1 (f=50MHz)
Frequency characteristics2 (f=150MHz)
' Frequency relative characteristics1 (f=150MHz)
Frequency relative characteristics1 (f=50MHz)
Frequency relative characteristics2 (f=150MHz)
Output amplitude when inputted SG3 (1MHz):4V
Output amplitude when inputted SG3 (1MHz):4V
C.T.1=20 log
C1
C2
(24, 28, 31 ) is calculated by the equation below:
(24, 28, 31) is calculated by the equation below:
∆
C1
C1
C2
BUS CONTROLLED 3-CHANNEL VIDEO PREAMP FOR CRT DISPLAY MONITOR
' is calculated by the difference in the
is calculated by the difference in the
is calculated by the difference in the
VOUT (24, 31)
VOUT V
VOUT V
VOUT (28)
P-P
P-P
P-P
. Control the brightness
P-P
(dB)
. By the same way,
P-P
. By the same
P-P
P-P
(dB)
(dB)
C.T.2 Crosstalk2 (f=50MHz)
Input SG3 (50MHz) to pin6 only, and then measure the waveform
amplitude output at OUT (24, 28, 31). The measured value is called
VOUT (24, 28, 31). Crosstalk C.T.2 is calculated by the equation
below:
C.T.2' Crosstalk2 (f=150MHz)
Measuring condition and procedure are the same as described in
C.T.2, expect SG3 to 150MHz.
C.T.3 Crosstalk3 (f=50MHz)
Input SG3 (50MHz) to pin11 only, and then measure the waveform
amplitude output at OUT (24, 28, 31). The measured value is called
VOUT (24, 28, 31). Crosstalk C.T.3 is calculated by the equation
below:
C.T.3' Crosstalk3 (f=150MHz)
Measuring condition and procedure are the same as described in
C.T.3, expect SG3 to 150MHz.
Tr Pulse characteristics1 (4V
Control the main contrast (00H) in order that the amplitude of output
signal is 4.0V
Control the brightness (V1) in order that the Black level of output
signal is 2.0V.
Measure the time needed for the input pulse to rise from 10% to 90
% (Tr1) and for the output pulse to rise from 10% to 90% (Tr2) with
an active probe.
Pulse characteristics Tr is calculated by the equations below :
∆Tr Relative pulse characteristics1
Relative characteristics ∆Tr is calculated by the difference in the
output between the channels.
Tf Pulse characteristics2 (4V
Measure the time needed for the input pulse to fall from 90% to 10%
(Tf1) and for the output pulse to fall from 90% to 10% (Tf2) with an
active prove.
Pulse characteristics Tf is calculated by the equations below :
P-P
C.T.2=20 log
C.T.3=20 log
.
Tr = [(Tr2)
Tf = [(Tf2)
MITSUBISHI ICs (Monitor)
VOUT (24, 31)
VOUT (28, 31)
P-P
P-P
VOUT (28)
VOUT (24)
)
)
2
2
-(Tr1)
-(Tf1)
M52745SP
2
2
]
]
(dB)
(dB)
8