TDA6501TT datasheet(21/40 Pages) PHILIPS

21 / 40 page

2003 Jun 05

Philips Semiconductors

Product speciﬁcation

5 V mixer/oscillator and synthesizer

for PAL and NTSC standards

TDA6500TT; TDA6501TT

handbook, full pagewidth

FCE214

LBIN

IFOUT

D.U.T.

NOISE

SOURCE

NOISE

FIGURE

METER

BNC

RIM

INPUT

CIRCUIT

Fig.9 Noise figure (NF) measurement in low band.

NF = NFmeas − loss of input circuit.

PAL:

IF = 38.9 MHz.

L = 680 nH.

C = 25.9 pF.

handbook, full pagewidth

Ω

38.9 MHz (PAL & OFDM)

LBIN

IFOUT

HYBRID

18 dB

attenuator

Vmeas

RMS

voltmeter

unwanted

signal

source

wanted

signal

source

AM = 30%

2 kHz

FILTER

D.U.T.

Ω

modulation

analyzer

FCE827

Fig.10 Cross modulation measurement in low band.

PAL:

IF = 38.9 MHz.

L = 680 nH.

C = 25.9 pF.

attenuation = 10.2 dB.

Vo =Vmeas ×

=Vmeas + attenuation.

Wanted output signal at fRFpix; Vo = 100 dBµV.

Unwanted output signal at fRFpix + 5.5 MHz.

The level of unwanted signal is measured by causing 0.09%

AM modulation in the wanted signal.

2 ω2

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