TDA6500TT Datasheet, PDF (21/40 Pages) NXP Semiconductors – 5 V mixer/oscillator and synthesizer for PAL and NTSC standards

Philips Semiconductors
5 V mixer/oscillator and synthesizer
for PAL and NTSC standards
Product specification
TDA6500TT; TDA6501TT
handbook, full pagewidth
NOISE
SOURCE
L
BNC
RIM
LBIN IFOUT
INPUT
CIRCUIT
D.U.T.
C
NOISE
FIGURE
METER
FCE214
NF = NF_meas − loss of input circuit.
PAL:
IF = 38.9 MHz.
L = 680 nH.
C = 25.9 pF.
Fig.9 Noise figure (NF) measurement in low band.
handbook, full pagewidth
50 Ω
eu
AM = 30%
2 kHz
unwanted
signal
source
A
C
HYBRID
50 Ω
ew
B
D
wanted
signal
source
LBIN IFOUT
D.U.T.
50
Ω
FILTER
18 dB
L
attenuator
modulation
analyzer
38.9 MHz (PAL & OFDM)
Vo ^C
Vmeas ^V
50
Ω
RMS
voltmeter
FCE827
V_o = V_meas × --------------5---0--------------- = V_meas + attenuation.
50² + L²Ï‰²
Wanted output signal at f_RFpix; V_o = 100 dBµV.
Unwanted output signal at f_RFpix + 5.5 MHz.
The level of unwanted signal is measured by causing 0.09%
AM modulation in the wanted signal.
PAL:
IF = 38.9 MHz.
L = 680 nH.
C = 25.9 pF.
attenuation = 10.2 dB.
Fig.10 Cross modulation measurement in low band.
2003 Jun 05
21