M61301SP Datasheet, PDF (14/25 Pages) Mitsubishi Electric Semiconductor – BUS CONTROLLED 3CH VIDEO PRE-AMP FOR CRT DISPLAY MONITOR

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M61301SP
BUS CONTROLLED 3CH VIDEO PRE-AMP FOR CRT DISPLAY MONITOR
Note43) Control the main contrast (00H) in order that the amplitude of output signal is 4.0Vp-p.
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 prove.
Pulse characteristics Tr is calculated by the equations below :
Tr = (Tr2) -²(Tr1) ² (nsec)
Note44) Measure the time needed for the input pulseto 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 :
Tf = (Tf2) - ²(Tf1) (n²sec)
100%
90%
0%
Tr1
or
Tr2
10%
Tf1
or
Tf2
Note45) Turn down the SG5 input level gradually from 5.0Vp-p, monitoring the waveform output.
Measure the top level of input pulse when the output pedestal voltage turn decrease with
unstable.
Note46) Decrease the SG5 pulse width gradually from 0.5us, monitoring the output. Measure the
SG5 pulse width (a point of 1.5V) when the output pedestal voltage turn decrease with
unstable.
Note47) Measure the pedestal voltage at 25 C. The measured value is called PDC1.
Measure the pedestal voltage at temperature of -20 C. The measured value is called
PDC2.
Pedestal voltage temperature characteristics 1 is calculated by the equation below:
PDCH=PDC1-PDC2
Note48) Measure the pedestal voltage at 25 C. The measured value is called PDC1.
Measure the pedestal voltage at temperature of 75 C. The measured value is called PDC3.
Pedestal voltage temperature characteristics 2 is calculated by the equation below:
PDCL=PDC1-PDC3
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