TDA6650ATT NXP [NXP Semiconductors], TDA6650ATT Datasheet - Page 38

• Manufacturer Part Number: TDA6650ATT
• Description: 5 V mixer/oscillator and low noise PLL synthesizer for hybrid terrestrial tuner (digital and analog)
• Manufacturer: NXP [NXP Semiconductors]

NXP Semiconductors
TDA6650ATT_6651ATT_2
Product data sheet
Fig 22. Noise figure (NF) measurement in high band with asymmetrical IF output
Fig 23. Cross modulation measurement in high band with asymmetrical IF output
V
Wanted signal source at f
Unwanted output signal at f
The level of unwanted signal is measured by causing 0.3 % AM modulation in the wanted signal.
Loss in hybrid = 1 dB.
NF = NF
e
e
50
50
o
u
w
= V
meas
AM = 30 %
unwanted
wanted
1 kHz
source
source
meas
signal
signal
+ 3.75 dB.
loss.
A
B
HYBRID
SOURCE
NOISE
RFpix
C
D
50
snd
.
is 70 dB V.
50
50
A
HYBRID
B
B
A
HYBRID
Rev. 02 — 2 February 2007
C
D
C
D
HBIN1
HBIN2
TDA6650ATT; TDA6651ATT
HBIN1
HBIN2
DUT
5 V mixer/oscillator and low noise PLL synthesizer
IFOUTA
IFOUTB
DUT
IFOUTA
IFOUTB
V
V
CCA
27
o
V
27
voltmeter
CCA
RMS
V
attenuator
V meas
10 dB
FIGURE
METER
NOISE
fce753
FILTER
57 MHz
© NXP B.V. 2007. All rights reserved.
modulation
analyzer
50
001aac097
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