CXA3219M 데이터 시트보기 (PDF) - Sony Semiconductor

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CXA3219M

UHF-Band RF Modulator for VCR

Sony Semiconductor 

CXA3219M

Electrical Characteristics 2

1. Video S/N

50dB (min.), 58dB (typ.)

2. Video amplitude frequency characteristics

(at 1MHz reference)

Within ±1dB at 0.5 to 5MHz

3. APL variation (Normalized to APL 50%) Within ±2% at 10 to 90%

4. Pin 5 input impedance

1MΩ and above

5. Pin 8 input impedance

1MΩ and above

∗1 Spectrum analyzer with 50Ω input impedance should be used to test video output level. Measured value Vo

(dBm) is used to calculate output according to the following relationship:

Output (dBµ) = Vo (dBm) + 107

50Ω terminal direct reading value

∗2 Measured after demodulating by standard demodulator.

∗3 fc + 2MHz component of V1 carrier (fc) level.

∗4 Adjust the V2 level to obtain an FM deviation of ±30kHz and measure the harmonic distortion after

demodulating Vo with a standard demodulator.

∗5 Video determined by measuring ratio (dB) of chroma beat to video carrier level when V1 = no signal by

spectrum analyzer.

∗6 R1 (12kΩ) of the Electrical Characteristics Test Circuit is added for obtaining a better match between the

audio modulation sensitivity classifications and the actual pre-emphasis.

Input Waveform

FLAT FIELD signal

V white

100 IRE

V sync

40 IRE

63.5µs

STAIR STEP signal

APL 50% subcarrier 20 IRE

63.5µs

90 IRE

0.5Vp-p

40 IRE

–5–

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