SU382223A1 - DEVICE FOR MANUAL AND AUTOMATIC REGULATION OF THE LEVEL OF BROADCAST SIGNAL - Google Patents

Description

one

The invention relates to the field of broadcasting, equipment, sound recordings.

Devices for manual and automatic adjustment of the levels of the broadcast signal are known, which contain the main sound path, level indicators and drip AGCs.

In order to improve the quality of regulation and facilitate the work of the sound engineer in the proposed device, a delay line is included in the main path, the input of which is connected to the input of an indi-capy device containing a delay line and a scanning device displaying the signal level pattern for the delay time in the main path , while the regulator of the level of the latter is connected at the output of its line, and is paired with the regulator, which is included in the vertical deflection of the tube.

A drawing is given the scheme of the proposed device.

The device contains a delay line U, a two-level control knob controlled by a flashlight 3, an amplifier 4, a storage device 5, a reading device 6, an amplifier 7, a snoozing generator 8, a display device 9, a manual regulator 10, a controlled link // and control channel.

The proposed device consists of the main sound path, the device I1 diction

2

level and control channel of the AGC system.

The main path contains a loudspeaker driver /, a manual level control 2, a controlled link 3, and an amplifier 4. As L1ppl and delay 1 any known device of the delayed sigals can be used, working without distortion of the signal and using a magnetic tape, magnetic drum, and t . e. As a controllable link, a molset uses a variable-slope lamp, a field-effect transistor, etc.

Into the device of indication of the level of the input memory of the ycTpoiicTBo 5 (3i) of a special type, the reading device 6, the amplifier 7, is synchronous; generator 8, device 9 selected; e 1i, manual regulator 1G and controlled link //. Memory 5 (analog or discrete Tina) is built, for example, on magiUiTHbix, power supply, etc., and allows you to enter information about the levels into the iero and store it defined., In advance, leg.1: oo time, Read only (represents a block that periodicals) reads (scans) information, nth, 5th. I cTpoiicTBo of display 9 represents a cathode tube with sweep devices. A controlled link is constructed similarly to a jumper and an O link to link 3. As controllers 2 and 10, a typical stereo regulator can be used, for example.

The control channel J2 of the AGC system includes a conventional full-wave detector, a low-pass filter, etc.

The scheme works as follows.

Broadcast signal enters the input line delay /. Through ustopovennoe delay time (within 2-10 seconds), the signal arrives at the manual level 2 regulator, with which the sound director inserts the necessary attenuation into the main path. Next, through the amplifier 4, the main signal passes through the system output. At the same time, the input signal is fed to the input of the memory device 5 of the memory level indicator. Using the readout device 6, the signal levels stored in the memory device for the time interval of about 2-10 seconds are periodically at least 25 times per second output from the memory device and, after amplification by means of an amplifier, 7 are fed to the vertical deflection system of the display device 9. The sweep of the signal on the screen of this device is strictly synchronized with the aid of the generator 8 with the period of reading the signal from the charger 5, as a result of which the image is kept stable on the screen of the display device 9, despite the fact that the broadcasting signal being displayed is randomly unnomic. Paired with a channel level regulator of the 101zn channel, regulator 10 allows the image size to be vertical; and exactly correspond to the increase in the sigal in the main path.

When the key K is turned on, the control channel appears at the output of the control channel block 12, which corresponds to the level of the sigal in the main sound path. The first control signal received is fed to adjustable links 3 and II and 1–13 and their transmission coefficient is given by a given law, and, if necessary, by the definition of the 1st program.

When the control position of the level regulator and the value of the control signal, which can be replaced by the controllable signal, the attenuation introduced into the path, is constant. Each signal level increase (each point of the displayed level pattern) smoothly moves over time, but horizontally across the screen of the display device at a constant distance from the upper and lower boundaries of the screen. If the attenuation introduced by the controllers or controlled

units, it changes, then each level value is moved along the scrap along a path that is related to the magnitude of the attenuation introduced and its rate of change.

Thus, the sound engineer receives full information about the signal levels during a certain time interval before going on the air (or recording). About the attenuation introduced in the adjustment process,

There is a time reserve to make this or that adjustment. In addition, the sound engineer may include automatic level adjustment, effectively control its operation and, if necessary, carry out a manual correction.

Subject invention

Device for manual and automatic

adjusting the level of the broadcast signal, which contains the basic sound path, the level indicator and the AGC channel, characterized in that, in order to increase the quality, it is regulated by 1 and and facilitated by the sound producer,

the path includes a delay line, the input of which is connected; 1 is not connected with the input of the indicacin device, which contains the delay line and scans its device, outputting the image of the signal level pattern to the screen of the electron beam tube during the delay time in the main path, and the downstream level regulator is turned on its delay lines are paired with a controller included in the vertical circuit.

tube deflection.

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entrance