參數(shù)資料
型號： MC44BC374CD
廠商： MOTOROLA INC
元件分類： 消費(fèi)家電
英文描述： PLL Tuned UHF and VHF Audio/Video High Integration Modulator
中文描述： SPECIALTY CONSUMER CIRCUIT, PDSO16
封裝： SO-16
文件頁數(shù)： 9/30頁
文件大?。?/td> 915K
代理商： MC44BC374CD
MOTOROLA
MC44BC373C/374C Technical Data
For More Information On This Product,
Go to: www.freescale.com
9
9
Modulator High Frequency Characteristics
Unless otherwise stated: V
cc
=5.0V, Ambient Temperture=25
o
C, Video Input 1V
p-p
, 10-step grayscale.
RF inputs/outputs into 75Ohm load. SPECIFICATIONS ONLY VALID FOR ENVELOPE
DEMODULATION.
Figure 3. Typical Performance
Parameter
Test Conditions
Min
Typ
Max
Unit
Type
TVOUT output level
Output signal from modulator section
See Figure 3. See Note 2
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.
See Note 2
50
60
—
dBc
B
Sound subcarrier harmonics (Fp
+
n
Fs) Reference picture carrier. See Note 2
Second harmonic of chroma subcarrier
—
63
58
dBc
C
Using red EBU bar. See Note 2
—
—
65
dBc
C
Chroma/Sound intermodulation:
Fp
+
(Fsnd–Fchr)
Using red EBU bar.See Note 2
—
—
65
dBc
C
Fo (picture carrier) harmonics
2nd harmonic: CH21
3rd harmonic: CH21
Other channels: See Figure 3.
See NOTE 1. See Note 2
1/2
Fo–1/4
Fo–3/2
Fo–3/4
Fo
From 40MHz to 1GHz. See Note 2
—
—
35
26
30
22
dBc
C
Out band (picture carrier) spurious
—
0
10
dB
μ
V
C
In band spurious (Fo±5MHz)
Note:
1: Picture carrier harmonics are highly dependant on PCB layout and decoupling capacitors.
Note:
2: See “Characterization Measurement Conditions” on page 12.
No video sound modulation.See Note 2
—
—
60
dBc
C
TV Output Level
72
73
74
75
76
77
78
471 521 571 621 671 721 771 821 871
Fre quency (M hz)
d
TV Output Attenuation
45
50
55
60
65
70
75
471 521 571 621 671 721 771 821 871
Fre que ncy (M hz)
d
3Fo Harm onics
15
20
25
30
35
40
45
471 521 571 621 671 721 771 821 871
F r e q u e n c y ( M h z )
d
2Fo Harm onics
15
20
25
30
35
40
471 521 571 621 671 721 771 821 871
Frequency (M hz)
d
Typical
Maximum specification
Typical
Typical
Typical
Minimum specification
Maximum specification
Maximum specification
Maximum specification
F
Freescale Semiconductor, Inc.
n
.
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