SU624286A1 - Device for measuring and checking amplitude-frequency characteristics of tape recorders - Google Patents
Device for measuring and checking amplitude-frequency characteristics of tape recordersInfo
- Publication number
- SU624286A1 SU624286A1 SU772460568A SU2460568A SU624286A1 SU 624286 A1 SU624286 A1 SU 624286A1 SU 772460568 A SU772460568 A SU 772460568A SU 2460568 A SU2460568 A SU 2460568A SU 624286 A1 SU624286 A1 SU 624286A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- measuring
- frequency characteristics
- tape recorders
- amplitude
- checking
- Prior art date
Links
Landscapes
- Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
Description
Изобретение относитс к области приборостроени и может быть использовано дл измерени и контрол амплитудночастотных характеристик (АЧХ) магнитофонов .The invention relates to the field of instrumentation and can be used to measure and control the amplitude-frequency characteristics (AFC) of tape recorders.
Известны устройства дл измерени и контрол электрическах параметров магнитофонов , в частности АЧК. Устройство содержит измеритель пол разброса неравномерности ЧХ, включающий генератор контрольных , сигналов, наборы фильтров, блок сравнени . Точность измерени в этом устройстве невысока jjlj.Devices are known for measuring and monitoring electrical parameters of tape recorders, in particular AFC. The device contains a measurer of the scatter field of non-uniformity of the black-scale, including a generator of control, signals, filter sets, a comparison unit. The measurement accuracy in this device is low jjlj.
Наиболее близким к изобретению по технической сущности вл етс устройст- во дл измерени и контрол амплитудночастотных .характеристик магнитофона, содержащее блок синхронизации, вход которого подключен к выходу магнитофона, а выход соединен с входом синхронизации осциллографа, имеющего также сигнальный вход. Данное устройство реализует способ основанный на воспроизведении записанной на магнитофонной ленте сигналограммы , представл ющей собой циклически.The closest to the invention in its technical essence is a device for measuring and monitoring the amplitude-frequency characteristics of a tape recorder, comprising a synchronization unit, the input of which is connected to the output of the tape recorder, and the output is connected to the synchronization input of an oscilloscope having also a signal input. This device implements a method based on the reproduction of a waveform record recorded on a tape, which is cyclically.
повтор ющиес последовательности частотных посылок. При воспроизведении такой сагналограммы на экране осциллографа одновременно наблюдают всю последовательность частотных посылок, по соотношению амплитуд которых путем совмещени изображени с лини ми допусков, нанесенными ни экране, визуально оценивают неравномерность АЧХ. Однако данное уст ройство имеет низкую точность измерени неравномерности АЧХ. Это св зано с тем, что воспроизводимый контрольноизмерительный сигнал подвержен .паразитной амплитудной модул ции, что приводит к колебани м амплитуд частотньсх посылок на экране осциллографа f2J.repeated sequences of frequency bursts. When playing such a syncogram on the oscilloscope screen, the entire sequence of frequency premises is simultaneously observed, according to the ratio of the amplitudes of which, by aligning the image with the tolerance lines plotted on the screen, the unevenness of the frequency response is visually assessed. However, this device has a low accuracy of measuring the non-uniformity of the frequency response. This is due to the fact that the reproducible test signal is subject to parasitic amplitude modulation, which leads to oscillations of the amplitudes of the frequency parcels on the oscilloscope screen f2J.
Целью изобретени вл етс повышение точности измерени амплитудно-частотных характеристик магнитофонов.The aim of the invention is to improve the accuracy of measuring the amplitude-frequency characteristics of tape recorders.
Это достигаетс тем, что в предлагаемом устройстве между выходом магнитофона и сигнальным входом осциллографа введены последовательно соединенные аналого-цифровой преобразователь блок усреднени н хранени и цифроаналоговый преThis is achieved by the fact that in the proposed device, between the output of the tape recorder and the signal input of the oscilloscope, a series-connected analog-to-digital converter is inserted, the averaging block and the digital-analog preset
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU772460568A SU624286A1 (en) | 1977-03-11 | 1977-03-11 | Device for measuring and checking amplitude-frequency characteristics of tape recorders |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU772460568A SU624286A1 (en) | 1977-03-11 | 1977-03-11 | Device for measuring and checking amplitude-frequency characteristics of tape recorders |
Publications (1)
Publication Number | Publication Date |
---|---|
SU624286A1 true SU624286A1 (en) | 1978-09-15 |
Family
ID=20698654
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU772460568A SU624286A1 (en) | 1977-03-11 | 1977-03-11 | Device for measuring and checking amplitude-frequency characteristics of tape recorders |
Country Status (1)
Country | Link |
---|---|
SU (1) | SU624286A1 (en) |
-
1977
- 1977-03-11 SU SU772460568A patent/SU624286A1/en active
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