M52722 データシートの表示（PDF） - MITSUBISHI ELECTRIC

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M52722

3-CHANNEL VIDEO PREAMPLIFIER PROVIDED WITH OSD MIX AND RETRACE LINE BLK FOR HIGH-RESOLUTION

MITSUBISHI ELECTRIC  

MITSUBISHI ICs (Monitor)

M52722SP

3-CHANNEL VIDEO PREAMPLIFIER PROVIDED WITH OSD MIX

AND RETRACE LINE BLK FOR HIGH-RESOLUTION

VSCR1 sub-contrast control characteristics and

∆VSCR1 relative sub-contrast control characteristics (at typ.)

1. Follow the electrical characteristics table except changing V4,V9

and V14 to 4.0V.

2. Read the output amplitude of T.P25 (T.P30 or T.P35) to let the

reading be VOR4 (VOG4 or VOB4).

3. Sub-contrast control characteristics VSCR1 and relative sub-

contrast control characteristics ∆VSCR1 are found by

VSCR1=20LOG

VOR4(VOG4, VOB4) [VP-P]

0.7

[VP-P]

∆VSCR1=VOR4/VOG4, VOG4/VOB4, VOB4/VOR4

through respective calculation.

VSCR2 sub-contrast control characteristics and

∆VSCR2 relative sub-contrast control characteristics (at min.)

1. Follow the electrical characteristics table except changing V4, V9

and V14 to 1.0V.

2. Read the output amplitude of T.P25 (T.P30 or T.P35) at this time

to let the reading be VOR5 (VOG5 or VOB5). This value represents

VSCR2.

3. Relative sub-contrast control characteristics ∆VSCR2 is found by:

∆VSCR2=VOR5/VOG5, VOG5/VOB5, VOB5/VOR5

VSCR3 contrast and sub-contrast control characteristics and

∆VSCR3 relative contrast and sub-contrast control

characteristics (at typ.)

1. Follow the electrical characteristics table except changing V17 to

3.0V, and V4, V9 and V14 to 3.0V.

2. Read the output amplitude of T.P25 (T.P30 or T.P35) at this time,

and let the reading be VOR6 (VOG6 or VOB6). This value

represents VSCR3.

3. Relative sub-contrast control characteristics ∆VSCR3 is found by:

∆VSCR3 =VOR6/VOG6, VOG6/VOB6, VOB6/VOR6

VB1 brightness control characteristics and

∆VB1 relative brightness characteristics (at max.)

1. The conditions shall be as specified in the electrical

characteristics table.

2. Measure the output of T.P25 (T.P30 or T.P35) at this time with an

ammeter, and let it be VOR7 (VOG7 or VOB7) to let it be VB1,

respectively.

3. For relative control characteristics, further, measure difference

between channels from VOR7, VOG7 or VOB7.

∆VB1=VOR7 VOG7

[V]

=VOG7 VOB7

=VOB7 VOR7

VB2 brightness control characteristics and

∆VB2 relative brightness control characteristics (at typ.)

1. The conditions shall be as specified in the electrical

characteristics table.

2. Use an ammeter to measure the output of T.P25 (T.P30 or T.P35)

at this time to let the value be VOR7 (VOG7 or VOB7). This value

represents VB2.

3. For relative brightness control characteristics ∆VB2, further,

calculate difference between channels from VOR7, VOG7 or VOB7.

∆VB2=VOR7’ VOG7’

[V]

=VOG7’ VOB7’

=VOB7’ VOR7’

VB3 brightness control characteristics and

∆VB3 relative brightness control characteristics (at min.):

1. The conditions shall be as specified in the electrical

characteristics table.

2. Use an ammeter to measure the output of T.P25 (T.P30 or T.P35)

at this time to let the value be VOR7" (VOG7" or VOB7"). This value

represents VB3.

3. For relative control characteristics ∆VB3, further, calculate

difference between channels from VOR7", VOG7" or VOB7".

∆VB3=VOR7’’ VOG7’’

[V]

=VOG7’’ VOB7’’

=VOB7’’ VOR7’’

FC1 and ∆FC1 frequency characteristics 1 and relative

frequency characteristics (f=50MHz at max.) and

FC1' and ∆FC1' frequency characteristics 1 and relative

frequency characteristics (f=180MHz at max.)

1. The conditions shall be as specified in the electrical charactristics

table.

2. Whilst SG1 and SG2 are used, input SGA first, apply voltage to

the input pin (pin 3 , pin 8 or pin 13 ) through about 2kΩ of

resistor so as to provide 2.5V on the lower side of input signal. In

addition, apply voltage to the hold pin (pin 23 , pin 28 or pin 33 ) to

ensure that the output wave of T.P25 (T.P30 or T.P35) will not be

jammed so as to allow the lower side of the sine wave, an output

signal to be 2V. Adjust the main contrast voltage (17V) at this

time to allow the output amplitude to be 4.0VP-P. Then, change

the input signal to SG1 or SG2 to measure each output

amplitude.

3. Now, when letting this test value be

output amplitude 4.0VP-P when SGA is input,

output amplitude VOR 8 (VOG8 or VOB8)

when SG1 is input, and

output amplitude VOR9 (VOG9 or VOB9),

frequency characteristics FC1 or FC1' is calculated from:

FC1=20LOG

VOR8(VOG8, VOB8)

4.0

[VP-P]

[VP-P]

FC1’=20LOG

VOR9(VOG9, VOB9)

4.0

[VP-P]

[VP-P]

4. For relative frequency bands ∆FC1 and ∆FC1', calculate difference

in FC1 and FC1 for each channel.

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