Q67000-A5112 データシートの表示（PDF） - Siemens AG

部品番号

コンポーネント説明

メーカー

Q67000-A5112

Video and Sound IF with FM-PLL Demodulator, AFC and V & S SCART

Siemens AG 

TDA 5950X

Alignment Instructions

At a video carrier input level of V23/24 = 4 mVrms, fP/C = 38.9 MHz, and a superimposed AGC

voltage of V3 = 1.5 V, the demodulator tank circuit is preliminarily aligned until a max. video signal

14 Vpp is obtained at the video output. Any suitable video test signal can be used for modulation.

The AGC voltage V3 is reduced until the signal is approx. 1 Vpp and the max. video signal is

obtained when fine-aligning the demodulator tank circuit. The alignment is not critical due to

relatively large bandwidth of the demodulator tank circuit. Fine-tuning to intercarrier S/N, differential

phase or 2T-pulse characteristics is possible.

Test Circuit

Semiconductor Group

9

Share Link: