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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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TDA6502 датащи(PDF) 27 Page - NXP Semiconductors |
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TDA6502 датащи(HTML) 27 Page - NXP Semiconductors |
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27 / 44 page  2000 Mar 16 27 Philips Semiconductors Preliminary specification 5 V mixers/oscillators and synthesizers for cable TV and VCR 2-band tuners TDA6502; TDA6502A; TDA6503; TDA6503A handbook, full pagewidth 50 Ω 50 Ω 50 Ω 50 Ω ew eu unwanted signal source wanted signal source AM = 30% 2 kHz FCE583 27 Ω 50 Ω 45.75 MHz V UHFIN UHFIN IFOUT A B C D HYBRID A B C D HYBRID 18 dB attenuator Vmeas RMS voltmeter modulation analyzer Vo FILTER D.U.T. Fig.18 Cross modulation measurement in UHF band. Vo =Vmeas × Wanted output signal at fRF(w) = 367.25 (801.25) MHz; Vo(w) = 100 dBµV. Measuring the level of the unwanted output signal Vo(u) causing 0.3% AM modulation in the wanted output signal; fRF(u) = 371.25 (805.75) MHz. fOSC = 413 (847) MHz. Filter characteristics: fc = 45.75 MHz, f−3 dB(BW) = 1.4 MHz, f−30 dB(BW) = 3.1 MHz. 50 27 + 50 ------------------- |
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