27C128 CD4020 Ton Üretici 800+1000hz 400+2600hz

Temel özellikleri: 800 + 1000 Hz veya 400 + 2600 Hz olmak üzere 2 frekans üretimi, 1000 Hz’lik eşsiz frekans üretimi, Min. 100 mV cc sur 600 Ohm, soit 35,4 mV eff. monofrekans veya 25,0 mV eff. tr 2 ton, Saf spektral 0.3 ve 150 kHz desteğinde. 50dB’ye kadar, Bozulma inf à %0,01 (tek frekansta), 9V’luk bir yığınla beslenme, 8 mA’lık tüketim ve alkalin bir yığınla 50 saat çalışma.

800/1000 Hz veya 200 Hz modunda veya 400/2600 Hz çiftinde bir çoklu giriş modunda genel 2 frekans farkı. Sinyal, maksimum 5 ms’ye kadar döner. Basit bir montajdan tasarruf etmek için, eprom ikili modda adreslenir ve mantık en kritik sonuçtur. 14 bitlik bir bölücü, kuvars için gerekli olan frekans 3,2768 MHz’dir ve bu, kullanım için en uygun standart değerdir.

The originality of this description is that the generation of tones BF is made using a DDS . And this not by using a special build , but easy to find in the drawer bottoms circuit components .

The main features of this assembly are :

– Generation 2 frequency 800 Hz or 400 + 1000 + 2600 Hz ( by moving a jumper)
– Generation of a single frequency of 1000 Hz
– Adjustable output level of a min level . 100 mV dc 600 Ohm 35.4 mV rms . in single frequency or 25.0 mV rms . 2 tones
– Spectral between 0.3 and 150 kHz sup Purity . 50dB
– Distortion lower than 0.01 % (by SFN )
– Powered by 9V battery consumption 8 mA or 50 hours of operation with alkaline battery .
– Switching automatic switching PTT .

Principle of Operation

How does a DDS?

In its simplest form, a DDS consists of a precision oscillator , an address counter , a prom containing the code and (analog digital / ) D / A converter . This is the solution that was chosen for this description.

Unlike the two frequencies generated mode 800/1000 Hz is 200 Hz or multiples in the case of the couple 400/2600 Hz signal is therefore renews at most every 5ms . To retain its simplicity in assembly, EPROM is addressed in binary mode and the software is written accordingly. With a 14-bit divider , the necessary crystal frequency of 3.2768 MHz is , which is fortunately a standard value .

27C128 CD4020 Ton Üretici tk5ep.free.fr/tech/gene2tons/fr/gene2tons.php