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參數(shù)資料
| 型號(hào)： | MC44BC374T1D |
| 廠商： | MOTOROLA INC |
| 元件分類： | 消費(fèi)家電 |
| 英文描述： | PLL Tuned PAL/NTSC UHF and VHF Audio/ Video High Integration Modulator IC |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, PDSO16 |
| 封裝： | SO-16 |
| 文件頁(yè)數(shù)： | 13/24頁(yè) |
| 文件大?。?/td> | 635K |
| 代理商： | MC44BC374T1D |
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MOTOROLA
MC44BC373/374
Technical Data
For More Information On This Product,
Go to: www.freescale.com
13
11.2 Typical Performance—Noise Figure
Figure 7. Typical Performance—Noise Figure
11.3 Intermodulation (IMD) Measurement
Figure 8. Intermodulation (IMD) Measurement
Intermodulation (IMD) frequencies are all frequency combinations coming from the two input carriers F1
and F2: F2–F1, 2
F1–F2, 2
F2–F1 and F1
+
F2, fall in the 40MHz–900MHz range.
F1 and F2 input levels are set to 90dBuV at the input of the BALUN. F1 and F2 frequency generator levels
(50W internal load) take into account a 50 to 75Ohm load difference (1
.
8dB), plus losses in the 3dB
coupler and the 50 to 75Ohm transformer.
Intermodulation measurement is the difference (in dBc) between the F1 or F2 level at the Output (VCRTU
or TVOUT) and the frequency combinations level, for the following cases:
Intermodulation specification is the IMD measurement’s worst case.
F1=50MHz and F2=60MHz
F1=300MHz and F2=310MHz
F1=600MHz and F2=610MHz
F1=100MHz and F2=110MHz
F1=400MHz and F2=410MHz
F1=700MHz and F2=710MHz
F1=200MHz and F2=210MHz
F1=500MHz and F2=510MHz
F1=800MHz and F2=810MHz
Noise Figure @ Modulator OFF
5
6
7
8
9
10
11
0
150
300
450
600
750
900
Frequency (Mhz)
d
Noise Figure @ Modulator ON
6
7
8
9
10
11
12
0
150
300
450
600
750
900
Frequency (Mhz)
d
Typical
Typical
Maximum specification
Maximum specification
F1
F2
MC44BC373/4
75/50
BALUN
TVOUT
Pin 20
VCRTU
Pin 17
50/75
75/50
90dBuV
F1 F2
F
F
2
–
F
2
–
F
F
–
F
F
IMD(dBc)
Spectrum Analyzer
F
Freescale Semiconductor, Inc.
n
.
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