TDA6650ATT NXP [NXP Semiconductors], TDA6650ATT Datasheet - Page 39

• 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 24. Cross modulation measurement in high band with symmetrical IF output
Fig 25. Maximum RF input level without lock-out in low and mid band with asymmetrical IF output
Fig 26. Maximum RF input level without lock-out in high band with asymmetrical IF output
e
e
50
50
u
w
V’
Wanted signal source at f
The level of unwanted signal V
N1 = 10 turns.
N2 = 2 turns.
N1/N2 = 5.
Z
V
Loss in hybrid = 1 dB.
V
i
i
i
meas
>> 50
= V
= V
AM = 30 %
unwanted
wanted
1 kHz
source
source
meas
meas
signal
signal
= V
o
+ 6 dB.
loss.
(transformer ratio N1/N2 = 5 and loss).
V
i
50
e
A
B
HYBRID
= 2
e
V
source
V
signal
C
D
meas
meas
50
RFpix
50
.
voltmeter
V
is 70 dB V.
RMS
o
at f
V
source
signal
50
meas
snd
50
HYBRID
A
B
is measured by causing 0.3 % AM modulation in the wanted output signal.
voltmeter
V
RMS
V
C
D
50
i
Rev. 02 — 2 February 2007
50
B
A
HYBRID
HBIN1
HBIN2
DUT
TDA6650ATT; TDA6651ATT
C
D
IFOUTA
IFOUTB
LBIN
or
MBIN
5 V mixer/oscillator and low noise PLL synthesizer
HBIN1
HBIN2
DUT
C
IFOUTA
IFOUTB
DUT
V
transformer
o
N1
IFOUTA
IFOUTB
V
27
CCA
N2
voltmeter
RMS
V
attenuator
V
V'
spectrum
analyzer
27
50
CCA
6 dB
meas
fce755
50
spectrum
analyzer
FILTER
57 MHz
fce756
© NXP B.V. 2007. All rights reserved.
modulation
analyzer
50
001aac098
39 of 54