M52722SP データシートの表示（PDF） - MITSUBISHI ELECTRIC

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M52722SP

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

FC2 and ∆FC2 frequency characteristics 2 and relative

frequency characteristics 2 (f=180MHz at typ.)

The same as for FC1, ∆FC1 and ∆FC1' applies except adjusting the

main contrast voltage (V17) and allowing the amplitude of output

signal when SGA is input to be 1.0VP-P.

C.T.1 crosstalk 1 (f=50MHz) and

C.T.1' crosstalk 1 (f=180MHz)

1. The conditions shall be as specified in the electrical

characteristics. (Set the input pin and hold pin as in the case of

FC1, ∆FC1, FC1' and ∆FC1')

2. Input SG1 (or SG2) to pin 13 (R-ch) only, measure the output

waveform amplitude of T.P25 (T.P30 or T.P35) to be VOR, VOG or

VOB.

3. Crosstalk C.T.1 (C.T.1')

VOG or VOB [VP-P]

C.T.1=20log

[dB]

(C.T.1’)

VOR [VP-P]

C.T.2 crosstalk 2 (f=50MHz) and

C.T.2' corsstalk 2 (f=180MHz)

1. Change the input pin to pin 8 (G-ch), and read the output as in

the case of C.T.1 or C.T.1'.

2. Crosstalk C.T.2 (C.T.2') is found by:

VOR or VOB [VP-P]

C.T.2=20log

[dB]

(C.T.2’)

VOG [VP-P]

C.T.3 crosstalk 3(f=50MHz) and

C.T.3' crosstalk 3(f=180MHz)

1. Change the input pin to pin 3 (B-ch), and read the output as in

the case of C.T.1 or C.T.1'.

2. Crosstalk C.T.3 (C.T.3') is found by:

VOR or VOG [VP-P]

C.T.3=20log

[dB]

(C.T.2’)

VOB [VP-P]

Tr, and Tf, Pulse characteristics 1 and pulse characteristics 2

1. The conditions shall be as specified in the electrical

characteristics table. Adjust the main contrast voltage (V17) and

brightness voltage (V19), and allow the output signal amplitude

to be 4.0Vp-p, and the black level 2.0V.

2. Use an active probe to measure rise Tr1 and fall Tf1 at 10% to

90% of input pulse.

3. Then, use an active probe to measure rise Tr2 and fall Tf2 at 10%

to 90% of output pulse.

4. Pulse characteristics Tr and Tf:

Tr (nsec) =

Tf (nsec) =

(Tr2)2 - (Tr1)2

(Tf2)2 - (Tf1)2

100%

90%

10%

0%

Tr1

Tf1

or

or

Tr2

Tf2

V14th clamping pulse threshold voltage

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

table.

2. Gradually reduce SG4 level at this time, while monitoring the

output signal (pedestal voltage: about 1.8V), and measure SG4

top level when the pedestal voltage of output signal is not

stabilized and starts to fall.

W14 minimum clamping pulse operation width

Gradually reduce SG4 pulse width, and measure SG4 pulse width

(1.5V from GND) when the pedestal voltage of output signal is not

stabilized and starts to fall.

PDCH and PDCL, pedestal voltage temperature characteristics 1

and pedestal voltage temperature characteristics 2

1. The conditions shall be as specified in the electrical

characteristics table.

2. Measure pedestal voltage at room temperature to let the value be

PDC1.

3. Then, measure pedestal voltage at -20˚C and 85˚C to let the

value be PDC2 or PDC3.

4. PDCH=PDC1-PDC2

PDCL=PDC1-PDC3

OTr and OTf, OSD pulse characteristics 1 and OSD pulse

characteristics 2

1. The conditions shall be as specified in the electrical

characteristics table. Adjust main OSD adjustment voltage (V36)

and brightness voltage (V19) to allow output signal amplitude to

become 3.0Vp-p, and black level 2.0.

2. Use an active probe to measure rise OTr1 and fall OTf1 at 10% to

90% of input pulse.

3. Use an active probe to measure rise OTtr2 and fall OTf2 at 10%

to 90% of output pulse.

4. OSD pulse characteristics OTr and OTf are found by:

OTr (nsec) =

OTf (nsec) =

(OTr2)2 - (OTr1)2

(OTf2)2 - (OTf1)2

7

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