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| 型號(hào)： | MC44BC373 |
| 廠商： | Motorola, Inc. |
| 英文描述： | Multi-Standard or PAL/ NTSC Modulator with integrated antenna booster/splitter ICs |
| 中文描述： | 多制式或PAL / NTSC制式，集成天線的助推器調(diào)制器/分路器集成電路 |
| 文件頁(yè)數(shù)： | 9/24頁(yè) |
| 文件大小： | 635K |
| 代理商： | MC44BC373 |
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MOTOROLA
MC44BC373/374
Technical Data
For More Information On This Product,
Go to: www.freescale.com
9
8 Modulator High Frequency Characteristics
Unless otherwise stated: V
cc
=5
.
0V, Ambient Temperature=25
o
C, Video Input 1V
p-p
, 10-step grayscale.
RF inputs/outputs into 75Ohm load. SPECIFICATIONS VALID ONLY FOR ENVELOPE
DEMODULATION.
Figure 3. Typical Performance—Modulator High Frequency
Parameter
Test Conditions
Min
Typ
Max
Unit
Type
TVOUT output level
Output signal from modulator section.
See Figure 3.
73
74
.
5
77
dB
μ
V
B
UHF oscillator frequency
—
460
—
880
MHz
A
VHF range
From UHF oscillator internally divided.
45
—
460
MHz
B
TVOUT output attenuation
During transient output inhibit, or
when ATT bit is set to 1. See Figure 3.
50
60
—
dBc
B
Sound subcarrier harmonics (Fp
+
n
Fs) Reference picture carrier.
Second harmonic of chroma subcarrier
—
–
63
–
58
dBc
C
Using red EBU bar.
–
65
—
—
dBc
C
Chroma/Sound intermodulation:
Fp
+
(Fsnd
–
Fchr)
Using red EBU bar.
–
65
—
—
dBc
C
Fo (picture carrier) harmonics
2nd harmonic: CH21
3rd harmonic: CH21
Other channels: See Figure 3.
See NOTE 1.
1/2
Fo
–
1/4
Fo
–
3/2
Fo
–
3/4
Fo
From 40MHz to 1GHz.
30
20
35
26
—
—
dBc
C
Out band (picture carrier) spurious
—
0
10
dB
μ
V
C
In band spurious (Fo 5MHz)
No video sound modulation.
—
—
60
dBc
C
NOTE 1: Picture carrier harmonics are highly dependant on printed circuit board layout and decoupling capacitors.
TV Output Level
72
73
74
75
76
77
78
471
521
571
621
671
721
771
821
871
Frequency (Mhz)
d
TV Output Atte nuation
45
50
55
60
65
70
75
471 521 571 621 671 721 771 821 871
Fre que ncy (M hz)
d
3Fo Harmonics
15
20
25
30
35
40
45
471
521
571
621
671
721
771
821
871
Frequency (Mhz)
d
2Fo Harmonics
15
20
25
30
35
40
471
521
571
621
671
721
771
821
871
Frequency (Mhz)
d
Typical
Minimum specification
Minimum specification
Typical
Typical
Typical
Minimum specification
Maximum specification
Minimum specification
F
Freescale Semiconductor, Inc.
n
.
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