PL105206B1 - SYSTEM FOR THE PRODUCTION OF COMPOUND VIDEO SIGNALS - Google Patents

Description

The invention relates to a manufacturing system composite video signals.

For testing and measuring information transmission systems there is a need to use signals disturbed by noise . to reproduce natural working conditions.

Known measuring systems using such a method require using separate devices for the production of signals payloads and disturbances. Production systems are also known powerful pseudorandom and random signals in combination with the gene raqa of periodic waveforms in the form of generators functions.

The object of the invention is to construct a production system complex video signals including both regular and random elements of strictly defined characteristics.

The essence of the invention is the combination of a generator function, composed of two current sources with different performance, one of which having a greater current efficiency is keyed by signals from two comparators and a programmable string generator pulses and a random noise generator through the summation of signals with the output filter limited lurking.

The system according to the invention in the embodiment is shown in the drawing in which Fig. 1 shows its block diagram, and Fig. 2 - an exemplary development function generator used in the system is presented in Fig. 1.

"A system for the production of complex video signals it consists of function generator 1, built of two opposing current sources 124 and 125, of which outputs 102, 103 and 104 connect to the system inputs summation 3. Output 104 is also in communication with an input (synchronization) of a programmable 2 signals generator subject to transfer.

The summation 3 is additionally linked by one noise generator input 4, and circuit output summation 3, through the filter 5, is the output of the input circuit the debt of the invention.

For example, the generator system shown in Fig. 2 function 1 consists of two opposing sources currents 124 and 125, of which the current source 125 it has more power efficiency and is keyed signals from two comparators 111 and 112 via flip-flop 113 type Rs. On capacitor 126, included tension arises towards the common point of these sources triangular 102, which is transformed into a sinusoidal voltage It is possible to combine this capacitor with elements linear 107 and non-linear 108 and 109.

In the summation 3 shown in the example expansion of Fig. 1, after selecting with the switches 309, 310 and 311 connected to outputs 102, 103, 104, 201 and 401 generators 1, 2 and 4 of the set of subordinate signals the summation of the adjusting elements 301, 302 and 303 make it possible establishing mutual relations between them and across the fields connection, through resistors 304, 305 and 306, to an amplifier operating 307 and resistor 308 provide their summation to produce a complex signal, before feeding it on the output filter 5 to limit the spectrum. 105 206 / 105 206 1Z f 113 m flg. 2 LZG Z-d 3 in Pab. residing 891-79, pic. 110 + 20 copies

Price PLN 45

Claims (1)

1. Claim A system for the production of composite video signals, consisting of a function generator, a programmable signal generator, an adder, a noise generator and a filter, characterized in that the function generator (1) consists of two opposing current sources (124). ) and (125), of which the current source (125) with higher efficiency is keyed by signals from two comparators (111) and (112), via a trigger (113) of the Rs type, delivering from its outputs (102), ( 103) and (104) of the component signals for the adder (3), to which the output of the generator (2) is connected, supplying a signal synchronized from the output (104), arbitrarily programmed waveforms and the output of the noise generator (4), and the output of the adder (3) is connected to the output (O) of the system through the restriction filter (5). 102 m r and T ^ ji- 4 WJJl l 304 308 306 \ ro. 303 & IE i 3fl? | J- i ~ _ 5 M _l ¦10 1 102 §124 1 W -C3- 103 * Ur i \ mi 4 109 \ 1fl 126 in As 125 -U *