TDA5632 Ver la hoja de datos (PDF) - Philips Electronics

Número de pieza

componentes Descripción

Fabricante

TDA5632

9 V VHF and UHF mixers/oscillators for TV and VCR cable tuners

Philips Electronics 

Philips Semiconductors

9 V VHF and UHF mixers/oscillators for TV

and VCR cable tuners

Product specification

TDA5632; TDA5633

handbook, full pagewidth

Vmeas V

wanted

input signal

50 Ω source

ew

unwanted

input signal

50 Ω source

eu

A

C

HYBRID

B

D

wanted

input

signal

50 Ω

50 Ω

RMS

voltmeter

A IN

IF

out

D.U.T.

A IN

MBH331

27 Ω

Vout 50 Ω

modulation analyzer

(unwanted AM on

the output wanted

frequency)

Wanted input signal = 80 dBµV; Zi >> 50 Ω = > wanted input signal = 2Vmeas; unwanted input signal modulated with 30% AM;

VoA(IF) = unwanted output signal Vout when the output wanted signal is modulated with 0.3% AM.

Measurement at 57.5 MHz: fwanted = 55.25 MHz (80 dBµV), funwanted = 59.75 MHz 30% modulated with 100 kHz, fosc = 101 MHz.

Measurement at 357.5 MHz: fwanted = 355.25 MHz (80 dBµV), funwanted = 359.75 MHz 30% modulated with 100 kHz, fosc = 401 MHz.

Fig.6 Band A 1% cross modulation.

handbook, full pagewidth signal

source

50 Ω

e

Vmeas V

50 Ω

RMS 50 Ω

voltmeter

Vin

A

C

C IN

IF

out

HYBRID

D.U.T.

27 Ω

Vout

V' meas

50 Ω

B

D

C IN

MBH332

spectrum

analyzer

Vin = Vmeas − loss of the hybrid; (Vin = 70 dBµV); loss of the hybrid = 1 dB;

Vout = V'meas × 5----0---5--+-0----2---7-- ; voltage gain for band C = 20 log -V-V---o-i--un--t .

Fig.7 Band C gain measurement.

1996 Aug 16

9

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