mc44bc373c Freescale Semiconductor, Inc, mc44bc373c Datasheet - Page 11

• Manufacturer Part Number: mc44bc373c
• Description: Pll Tuned Uhf And Vhf Audio/video High Integration Modulator
• Manufacturer: Freescale Semiconductor, Inc

11 Audio Characteristics
Unless otherwise stated: V
RF inputs/outputs into 75Ohm load. SPECIFICATIONS ONLY VALID FOR ENVELOPE
DEMODULATION.
Picture-to-Sound ratio
Audio modulation depth
Audio input resistance
Audio Frequency response
Audio Distortion FM (THD only)
Audio Distortion AM (THD only)
Audio S/N with Sync Buzz FM
Audio S/N with Sync Buzz AM
Parameter
cc
Freescale Semiconductor, Inc.
=5.0V, Ambient Temperture=25
For More Information On This Product,
PS bit set to 0
PS bit set to 1
Using specific pre-emphasis circuit,
audio input level=205mVrms–audio frequency=1kHz
AM modulation: SECAM Fs=6.5MHz
FM modulation: Fs=5.5, 6 or 6.5MHz
100% modulation=±50kHz FM deviation
FM modulation: NTSC Fs=4.5MHz
100% modulation=±25kHz FM deviation
Reference 0dB at 1kHz,
using specified pre-emphasis circuit,
measure from 50Hz to 15kHz
at 1kHz, 100% modulation (±50kHz)
No video
at 1kHz, 100% modulation
No video
Ref 1Khz, 50% modulation (+/-25Khz)
EBU color bars Video signal,
using CCIR 468.2 weighting filter
Reference 1kHz, 85% modulation
Video input EBU color bar 75%
Audio BW 40Hz—15kHz
Weighting filter CCIR 468-2
58
56
54
52
50
48
46
MC44BC373C/374C Technical Data
Figure 5. Typical Performances
471 521 571 621 671 721 771 821 871
Go to: www.freescale.com
Typical
Audio Signal to Nois e
Test Conditions
Fr e que ncy (M hz )
Minimum specification
o
C, Video Input 1V
–2.5
Min
13
45
48
45
—
—
—
—
—
9
Typ
0.4
1.5
16
12
80
80
80
53
53
50
—
p-p
Audio Characteristics
, 10-step grayscale.
Max
2.5
19
15
61
+2
—
—
—
—
—
2
Unit
KΩ
dB
dB
dB
dB
%
%
%
%
%
Type
B
B
B
A
C
C
D
C
D
B