SU974408A1 - Device for checking multi-channel magnetic recording playback section - Google Patents

Description

(54) DEVICE FOR MONITORING THE MULTI-CHANNEL TRACT OF MAGNETIC RECORDING-PLAYBACK

one

The invention relates to magnetic recording, in particular, to devices for monitoring a multi-channel magnetic recording-reproduction path.

. A device for controlling a multi-channel magnetic recording-reproduction path is known, in which a recording unit is connected via a key to a pulse generator, and the playback unit is connected to registers and contains subtractive Q counters 1 ..

However, in this device, obtaining a statistical evaluation of the fidelity of the recording-reproduction is fraught with considerable difficulties., 5

Closest to the present invention is a device comprising a pulse generator connected via a key to the inputs of a recording unit coupled with a magnetic recording medium. The outputs of the key 20 connected to the information inputs of the block are connected to the inputs of the subtractive counter; the switch, the latter is also connected to the input of the key and to the outputs of the code dialing block. The carrier is associated with a playback unit, the output of service information (which is connected to the registers, and the information outputs to the subtractive counters, also connected to the registers and the second dialing unit.

However, the known device does not allow to obtain with sufficient accuracy the statistical detection of the fidelity of recording information on recorders under the conditions of a large number of destabilizing factors and to make a comparative assessment of them at fixed time intervals.

The purpose of the invention is to improve the accuracy of statistical evaluation of the accuracy of the recording information.

This goal is achieved by the fact that a known device for controlling the multichannel magnetic recording-reproduction path, comprising a pulse generator, a key and a recording unit, as well as a first code dialing unit connected via a counter to a second input key, whose inputs are also connected to the counter installation input, and a playback unit connected to the inputs of the subtracting counters, the number of which is equal to the number of tracks whose setup inputs are connected to the second block of the code set, and also registers the number of tracks are equal to the number of samples and the recorder, a pulse distributor, an output OR element, a delay element, number residual decoders and autonomous elements OR by the number of registers are entered, while the control output of the playback unit is connected to the rewriting inputs of the residue decoders through the delay element to the reset inputs of the subtracting counters and through the pulse distributor to the control inputs of the registers, the outputs of each of the reading counters connected to the inputs of the corresponding decryptor of the residual numbers each the output of which is connected to the corresponding input of the autonomous element OR, while the outputs of the independent elements OR are connected through the appropriate registers to the inputs of the output element OR whose output is connected to the recorder. FIG. .1 is a functional diagram of the proposed device; FIG. 2 shows timing diagrams illustrating the operation of the device. The device contains a pulse generator 1, a key 2, a recording unit 3, magnetic media 4, as well as the first code set 5 connected through counter 6 to the second input of key 2, the outputs of which are also connected to the installation input of counter 6, and playback unit 7 . The output of the playback unit 7 is connected to the inputs of the deducting counters 8, the number of which is equal to the number of tracks of magnetic media 4, the setting inputs of which are connected to the second unit, 9 dialing codes, as well as the registers 10 whose number is equal to the number of samples, and the recorder 11 made , for example in the form of a plotter. The proposed device also includes a pulse distributor 12, an output element OR 13, a delay element 14 and a decoder 15 residual numbers consisting of comparison circuits and sensors of fixed numbers, and autonomous elements OR 16 by the number register. At the same time, the control output of the playback unit 7 is connected to the rewriting inputs of the decoders 15 residuals of the numbers through delay element 14 to the reset inputs of the subtractive counters 8 and through the distributor 12 pulses to the control inputs of the registers E. The outputs of each of the subtractive counters 8 are connected to the inputs of the corresponding de coder 15 residuals of numbers, each calculation of which is connected to the corresponding input of an autonomous element OR 16. The outputs of autonomous elements OR 16 are connected through the corresponding registers 10 to the inputs output jTa OR of the elements 13, whose output is connected to the I registrar 11. The apparatus operates as follows. In the recording system, the reference number of pulses is recorded on the information tracks of the carrier 4, and the pulses determining the duration of fixed time intervals are recorded on the service track. The pulses are generated by the key 2, which is controlled by the counter 6, the reference number from the code set block 5 is previously entered into it. Key 2 transmits pulses until reading is completed in counter 7, after which key 2 closes. The end of the first recording cycle is recorded on the service track by a pulse from the private key 2 (FIG. 2h), after which the recording cycle is repeated. When playing a magnetic tape, the playback unit 7 reads from the carrier 4 information pulses, accessing the subtractive counters 8, into which the reference number has been previously entered from the block 9 of the code set. The subtracting counters 1 to 8 are discharged by pulses coming through delay element 14 (Fig. 25) from the control output of the playback unit. Prior to the arrival of the next reset pulse, the remainder of the numbers are read from the decoder of the playback unit 7 from the decoders 15 residual numbers and each sample is fed through the corresponding autonomous elements OR 16 to the corresponding register 10. After calculating the specified number of pulses read from the backplane, the distributor 12 pulses It generates a consecutive series of read pulses (Fig. 2c) from registers 1O. The inclined pulses from the registers 10 through the output element OR 13 are fed to the recorder 11, from the output of which the final result is obtained {fP. 2d). The use of the invention allows to significantly increase

the accuracy of the statistical evaluation of the fidelity of the recording of information in the presence of a large number of destabilizing factors, and the operational analysis of registering systems.

Claims (2)

1. Collector of works of ZNIIS. M., 1964 shlp. 2, s. 65-71. 2. The copyright certificate CiCCP № 339956, cl. C 11 V 27/36, 1970 (prototype).