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參數(shù)資料
| 型號： | TDA6509A |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | 3-band mixer/oscillator and PLL for terrestrial tuners |
| 中文描述： | 3波段混頻器/振蕩器，鎖相環(huán)路的地面電視調諧器 |
| 文件頁數(shù)： | 24/42頁 |
| 文件大?。?/td> | 274K |
| 代理商： | TDA6509A |
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2005 Mar 25
24
Philips Semiconductors
Product specification
3-band mixer/oscillator and PLL for
terrestrial tuners
TDA6508; TDA6508A;
TDA6509; TDA6509A
handbook, full pagewidth
MDB264
LOW_RFIN or
MID_RFIN
IFAMP_OUT1
D.U.T.
NOISE
SOURCE
NOISE
FIGURE
METER
BNC
RIM
INPUT
CIRCUIT
27
Fig.14 Noise figure measurement in the LOW and MID-bands of the TDA6508A; TDA6509A.
NF = f
meas
input circuit loss (dB).
handbook, full pagewidth
unwanted
signal
source
eu
ew
50
50
wanted
signal
source
50
MDB261
D.U.T.
LOW_RFIN
IFAMP_OUT1
IFAMP_OUT2
18 dB
attenuator
50
o
N1/N2 = 5
2 x 5
turns
2
turns
V
FILTER
38.9 MHz
modulation
analyzer
HYBRID
A
C
B
D
V
RMS
voltmeter
Vi
AM = 30%
Vo(meas)
Fig.15 Cross-modulation measurement in the LOW-band of the TDA6508; TDA6509.
V
o
= V
o(meas)
+ 15 dB (transformer ratio N1/N2 and transformer loss).
Wanted output signal at picture carrier frequency f
RF(w)
; V
o(w)
= 110 dB
μ
V.
Unwanted output signal at sound sub-carrier frequency f
RF(u)
; AM = 30%; AF = 2 kHz.
Measuring the level of unwanted signal causing 0.3% AM in the wanted signal.
f
RF(w)
= 43.25 MHz (min); 161.25 MHz (max).
f
RF(u)
= 48.75 MHz (min); 166.75 MHz (max).
f
osc
= 82.15 MHz (min); 200.15 MHz (max.).
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