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參數(shù)資料
| 型號： | MC44BC374EJBR2 |
| 廠商： | Freescale Semiconductor |
| 文件頁數(shù)： | 24/24頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC MODULATOR ANT BOOSTER 24TSSOP |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 類型： | 調(diào)制器 |
| 應(yīng)用： | 機(jī)頂盒 |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 24-TSSOP（0.173"，4.40mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 24-TSSOP |
| 包裝： | 帶卷 (TR) |
Modulator High Frequency Characteristics
MC44BC373/374 Technical Data
8 Modulator High Frequency Characteristics
Unless otherwise stated: Vcc=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
74.577
dB
VB
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
+nFs) Reference picture carrier.
—–63
–58
dBc
C
Second harmonic of chroma subcarrier
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.
30
20
35
26
—
dBc
C
Out band (picture carrier) spurious
1/2
Fo–1/4Fo–3/2Fo–3/4Fo
From 40MHz to 1GHz.
—
010
dB
VC
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 Le ve l
72
73
74
75
76
77
78
471
521
571
621
671
721
771
821
871
Fr e que ncy (M hz)
dB
uV
TV O ut put A t t e nua t ion
45
50
55
60
65
70
75
4 71 5 21 57 1 6 21 6 71 72 1 77 1 821 87 1
Fre que nc y ( M hz )
dB
c
3Fo Har m onics
15
20
25
30
35
40
45
471
521 571
621
671
721
771
821
871
Fr e que ncy (M hz )
dB
c
2Fo Har m onics
15
20
25
30
35
40
471
521 571
621
671
721
771
821
871
Fr e que ncy (M hz )
dB
c
Typical
Minimum specification
Typical
Minimum specification
Maximum specification
Minimum specification
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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