M52775 查看數據表（PDF） - MITSUBISHI ELECTRIC

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M52775

VIF, SIF, VIDEO, CHROMA, DEFLECTION FOR NTSC

MITSUBISHI ELECTRIC  

MITSUBISHI ICs (TV)

M52775FP

VIF, SIF, VIDEO, CHROMA, DEFLECTION FOR NTSC

ELECTRICAL CHARACTERISTICS TEST METHOD

P/N Video S/N

1. Input SG3 and measure the rms value of output signal at pin 57.

2. P/N is defined as follows:

P/N=20log V0NEG measured value (VP-P) ×103×0.7

Measured value (mVrms)

(dB)

Vf Video frequency characteristics

1. Input SG4 and set the frequency f2 to 44.75MHz so that the beat

element of 1MHz is output to pin 57.

2. Then set the applied voltage at pin 60 so that the beat element of

1MHz at pin 57 may be 100dBµ.

3. Decrease f2 to the level at which the beat element becomes 3dB

smaller than the element of 1MHz, and read the value at that

level.

P57 100dBµ

3dB

IM Intermodulation

1. Adjust the applied voltage at pin 60 so that the lowest output

signal voltage at pin 57 is 2.2V.

P57

2.2V

2. Measure elements of 0.92MHz and 3.579545MHz of output at

pin 57.

3. IM is defined as follows:

IM=20log

Element of 0.92MHz

Element of 3.579545MHz

(dB)

ATT Maximum attenuation

1. Measure the element of 400Hz of output at pin 51.

2. ATT=20log

V0AFmax

Measured value

(dB)

1MHz

BW

Vin min. Input sensitivity

1. Decrease SG5 level until the video detector output is 3dB

smaller then the measured value of Parameter V3 “Video

detector output”.

Vin max. Maximum permissible input

1. Input 90dBµ SG6.

2. VA is the output level at pin 57. Increase SG6 voltage until the

output at pin 57 becomes 3dB smaller than VA. The input levell at

that time is the maximum permissible input.

µAFTN AFT detector sensitivity

V58H Maximum AFT voltage, V58L Minimum AFT voltage

See the following figure.

P1 V1HN

∆f

5.0V

3.0V

44.75Mz

f0

V1LN

46.75MHz

f

µAFTN is defined as follows:

µAFTN=

(5.0-3.0)×103mV (mV/kHz)

∆f kHz

LIM Input limiting sensitivity

Decrease the input level of SG18. Measure the input level when the

element of 400Hz at pin 52 is 3dB smaller than V0AFM (S6:

Maximum AF output (6.0M)).

AMR

1. Vam is the element of 400Hz at pin 52.

2. AMR is defined as follows:

AMR=20log

V0AF (mVrms)

Vam (mVrms)

(dB)

AF S/N

1. Measure the noise (20Hz to 100kHz) of output at pin 52.

2. AF S/N is defined as follows:

AF S/N=20log

V0AFmax

(dB)

Measured value

GEAu EXT Audio GAIN

Input SG22 at pin 53, and measure the output VP-P at pin 49.

GAIN=20log

Input signal VP-P

Output signal VP-P (pin49)

(dB)

Cn1 Output signal amplitude 1

Cn2 Output signal amplitude 2

1. Input SS from pin 36 IN.

2. Measure output amplitude, Cn1 and Cn2, at pins 18 and 20

respectively.

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