TDA6508TT NXP Semiconductors, TDA6508TT Datasheet - Page 30

• Manufacturer Part Number: TDA6508TT
• Manufacturer: NXP Semiconductors

Specifications of TDA6508TT

• Pin Count: 32
• Screening Level: Commercial
• Package Type: TSSOP
• Lead Free Status / Rohs Status: Compliant

Philips Semiconductors
2005 Mar 25
handbook, full pagewidth
3-band mixer/oscillator and PLL for
terrestrial tuners
V
Wanted output signal at picture carrier frequency f
Unwanted output signal at sound sub-carrier frequency f
We measure the level of unwanted signal causing 0.3% AM modulation in the wanted signal
f
f
f
RF(w)
RF(u)
osc
e w
e u
o
= V
= 478.15 MHz (min.); 902.15 MHz (max.).
= 444.75 MHz (min.); 868.75 MHz (max.).
= 439.25 MHz (min.); 863.25 MHz (max.).
o(meas)
50
50
+ 3.75 dB.
Fig.26 Cross-modulation measurement in the HIGH-band of the TDA6508A; TDA6509A.
AM = 30%
unwanted
wanted
source
source
signal
signal
B
A
HYBRID
C
D
50
V i
RF(w)
50
; V
HYBRID
A
B
RF(u)
o(w)
; AM = 30%; AF = 2 kHz.
= 100 dB V.
C
D
HIGH_RFIN1
HIGH_RFIN2
30
IFAMP_OUT1
D.U.T.
V o
27
voltmeter
RMS
V
TDA6508; TDA6508A;
TDA6509; TDA6509A
attenuator
V o(meas)
18 dB
38.9 MHz
FILTER
Product specification
modulation
analyzer
50
MDB252