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參數資料
型號: 935261234112
廠商: NXP SEMICONDUCTORS
元件分類: 消費家電
英文描述: SPECIALTY CONSUMER CIRCUIT, PDSO28
封裝: PLASTIC, SOT-341, SSOP-28
文件頁數: 16/44頁
文件大小: 241K
代理商: 935261234112
2000 Jan 24
23
Philips Semiconductors
Product specication
5 V mixers/oscillators and synthesizers for
cable TV and VCR 2-band tuners
TDA6402; TDA6402A;
TDA6403; TDA6403A
NF = NFmeas loss (of input circuit) (dB).
Fig.14 Noise figure (NF) measurement in VHF band.
handbook, full pagewidth
MGE699
22
VHFIN
IFOUT
D.U.T.
NOISE
SOURCE
NOISE
FIGURE
METER
BNC
RIM
INPUT
CIRCUIT
handbook, full pagewidth
MGE700
50
50
22
50
50
45.75 MHz
V
VHFIN
IFOUT
A
B
C
D
HYBRID
ew
eu
18 dB
attenuator
Vmeas
RMS
voltmeter
modulation
analyzer
unwanted
signal
source
wanted
signal
source
AM = 50%
1 kHz
Vo
FILTER
D.U.T.
Fig.15 Cross modulation measurement in VHF band.
Vo =Vmeas ×
Wanted output signal at fRFW = 55.25 (361.25) MHz; Vo(w) = 100 dBV.
Measuring the level of the unwanted output signal Vo(u) causing 0.5% AM modulation in the wanted output signal; fRFU = 59.75 (366.75) MHz.
fOSC = 101 (407) MHz.
Filter characteristics: fC = 45.75 MHz, f3 dB(BW) = 1.4 MHz, f30 dB(BW) = 3.1 MHz.
50
22
+
50
-------------------
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