Video Characteristics

MC44BC375/U/J/T Technical Data

9 Video Characteristics

10 Audio Characteristics

All audio measurement use specified pre-emphasis circuit.

11 Characterization Measurement Conditions

Device default configuration unless otherwise specified:

•

Sound subcarrier frequency = 5.5Mhz

•

Picture-to-sound carrier ratio = 12dB

•

CH3 & CH4 frequencies

RF Inputs / Output into 75ohm Load using a 75 to 50 ohm transformation.Video Input 1V pk-pk.Audio

pre-emphasis circuit engaged.

Parameter

Test Conditions

Min

Typ

Max

Unit

Type

Video bandwidth

Reference 0dB at 100kHz, measured at

5MHz

-1.5

-0.5

—

dB

C

Video input level

75Ohm load

—

—

1.5Vcvbs

D

Video input current

—

0.2

1

µAA

Video input impedance

500

—

—

K

Ω

A

Video S/N

Unweighted

Weighted

49

56

52

60

—

—

dB

dB

C

C

Differential Phase

+/-1

+/-5

deg

C

Differential Gain

1

5

%

C

Luma/Sync ratio

Input ratio 7.0:3.0

6.8/ 3.2

—

7.2/2.8

—

B

Video modulation depth

Video input level=1.0 Vcbvs

80

85

90

%

B

Peak White Clip

Video Modulation Depth for Video=1.4 Vcbvs

90.5

95

99.5

%

B

Parameter

Test Conditions

Min

Typ

Max

Unit Type

Picture to Sound ratio

PSS (Pin2) = HI

PSS (Pin2) =LO

14

12

16

14

18

16

dB

dB

B

Picture to Sound ratio

difference

between PSS = HI and PSS = LO

1.5

2.0

2.5

dB

B

Audio FM Modulation Depth

Using specific pre-emphasis circuit - Audio Input: 1Khz @ 205 mVrms

Fs = 4.5 MHz

(100% Modulation = +/- 25 kHz FM Deviation)

75

85

95

%

B

Fs = 5.5 MHz

(100% Modulation = +/- 50 kHz FM Deviation)

75

85

95

%

B

Audio input resistance

45

55

61

k

Ω

A

Audio Frequency response

0dB ref @1kHz

Measure from 50Hz to 15kHz

-2.5

-

+2

dB

C

AudioDistortionFM (THD

only)

At 1 kHz and 100% mod (+/- 50 kHz) - No Video

-

0.3

1

%

C

Audio S/N with Sync Buzz FM

50

53

-

dB

C

Freescale Semiconductor, Inc.

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