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參數(shù)資料
| 型號： | 935261948118 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 調諧器 |
| 英文描述： | 2-BAND, VIDEO TUNER, PDSO24 |
| 封裝： | PLASTIC, SOT-137, SO-24 |
| 文件頁數(shù)： | 4/31頁 |
| 文件大小： | 328K |
| 代理商： | 935261948118 |
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1997 Feb 24
12
Philips Semiconductors
Product specication
5 V VHF, hyperband and UHF mixers/oscillators
for TV and VCR 3-band tuners
TDA5736; TDA5737
Fig.7 Cross modulation measurement in band A.
V’meas =Vo 15.4 dB (transformer ratio N1/N2 = 5 and transformer loss).
Wanted output signal at fRFW = 50 MHz (170 MHz); Vow =80dBV.
We measure the level of the unwanted signal Vou causing 1% AM modulation in the wanted output signal; fRFU = 45.5 MHz (165.5 MHz);
fosc = 83.9 MHz (203.9 MHz).
Vou =V’meas + 15.4 dB.
Filter characteristics: fc = 33.9 MHz, f3dBBW = 1 MHz; f30dBBW = 2.3 MHz.
handbook, full pagewidth
unwanted
signal
source
eu
ew
50
50
wanted
signal
source
50
MGE972
D.U.T.
RFA
IF
out
IF
out
18 dB
attenuator
50
o
N1/N2 = 5
2 x 5
turns
2
turns
V
FILTER
33.9 MHz
modulation
analyzer
HYBRID
AC
BD
V
RMS
voltmeter
VIMA
AM = 30%
meas
V'
Fig.8 Ripple susceptibility.
The ripple susceptibility is defined as the level of a signal added to the supply voltage causing sidebands in the LO output at 53.5 dBc.
This signal has a frequency between 20 Hz and 500 kHz.
handbook, full pagewidth
MGE974
REFERENCE
MEASUREMENT
SET-UP
OF FIG. 17
WITHOUT
L10, C25, C35, C26
fo
500 kHz
+500 kHz
to
spectrum
analyser
ripple
signal
47
6.8 k
100
F
100
F
DC supply
53.5 dBc
VP
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