M52742SP 데이터 시트보기 (PDF) - MITSUBISHI ELECTRIC

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M52742SP

BUS CONTROLLED 3-CHANNEL VIDEO PREAMP FOR CRT DISPLAY MONITOR

MITSUBISHI ELECTRIC  

MITSUBISHI ICs (Monitor)

PRELIMINARY

Notice:This is not a final specification.

Some parametric limits are subject to change.

M52742SP

BUS CONTROLLED 3-CHANNEL VIDEO PREAMP FOR CRT DISPLAY MONITOR

∆Tf Relative pulse characteristics2

Relative characteristics ∆Tf is calculated by the difference in the

output between the channels.

100%

90%

∆Oaj1 OSD adjust control relative characteristics1

Relative characteristics ∆Oaj1 is calculated by the equation below:

∆Oaj1= VOUT (29)/VOUT (32),

VOUT (32)/VOUT (35),

VOUT (35)/VOUT (29)

0%

Tr1 or Tr2

10%

Tf1 or Tf2

VthCP Clamp pulse threshold voltage

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.

Oaj2 OSD adjust control characteristics2

Measuring condition and procedure are the same as described in

Oaj1.

∆Oaj2 OSD adjust control relative characteristics2

Measuring condition and procedure are the same as described in

∆Oaj1.

OBLK OSD adjust control characteristics3

Measuring condition and procedure are the same as described in

Oaj1.

WCP Clamp pulse minimum width

Decrease the SG5 pulse width gradually from 0.5µs, monitoring the

output. Measure the SG5 pulse width (a point of 1.5V) when the

output pedestal voltage turn decrease with unstable.

PDCH Pedestal voltage temperature characteristics1

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

PDCL Pedestal voltage temperature characteristics2

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

OTr OSD pulse characteristics1

Measure the time needed for the output pulse to rise from 10% to

90% (OTR) with an active prove.

OTf OSD pulse characteristics2

Measure the time needed for the output pulse to fall from 90% to

10% (OTF) with an active prove.

Oaj1 OSD adjust control characteristics1

Measure the amplitude output at OUT (29, 32, 35). The measured

value is called VOUT (29,32,35), and is treated as Oaj1.

∆OBLK OSD adjust control relative characteristics3

Measuring condition and procedure are the same as described in

∆Oaj1.

VthOSD OSD input threshold voltage

Reduce the SG6 input level gradually, monitoring output. Measure

the SG6 level when the output reaches 0V. The measured value is

called VthOSD.

VthBLK OSD BLK input threshold voltage

Confirm that output signal is being blanked by the SG6 at the time.

Monitoring to output signal, decreasing the level of SG6. Measure

the top level of SG6 when the blanking period is disappeared. The

measured value is called VthBLK.

HBLK1 Retrace BLK characteristics1

Measure the amplitude output is blanked by the SG7 at OUT (29,

32, 35). The measured value is called VOUT (29, 32, 35), and is

treated as HBLK1.

HBLK2 Retrace BLK characteristics2

Measure the amplitude output is blanked by the SG7 at OUT (29,

32, 35). The measured value is called VOUT (29, 32, 35), and is

treated as HBLK2.

HBLK3 Retrace BLK characteristics3

Measure the amplitude output is blanked by the SG7 at OUT (29,

32, 35). The measured value is called VOUT (29, 32, 35), and is

treated as HBLK3.

VthRET Retrace BLK input threshold voltage

Confirm that output signal is being blanked by the SG7 at the time.

Monitoring to output signal, decreasing the level of SG7. Measure

the top level of SG7 when the blanking period is disappeared. The

measured value is called VthRET.

9

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