SU1520583A1 - Method of setting the mode of line magnetic recording by rotary heads - Google Patents

Abstract

The invention relates to the accumulation of information and can be used to set the mode of line magnetic recording by rotating heads. The purpose of the invention is to accelerate the installation process of the line magnetic recording mode without reducing the accuracy of the installation. Each rotating head records a pilot signal in the presence of a high-frequency bias varying in current level, as well as a bias current signal level. In the process of reproducing the pilot signal, at the maximum value of the reproduced pilot signal for each rotating head, the bias current level signal is remembered, which is used to set the high frequency bias current level for the next recording mode of each rotary head.

Description

The invention relates to the field of accumulation of information, in particular, to methods for setting the mode of line magnetic recording by rotating heads.

The aim of the invention is to accelerate the process of setting the line magnetic recording mode without reducing the accuracy of the installation.

The drawing shows one of the possible variants of the device for carrying out the method of setting the mode of the lowercase magnetic recording by rotating heads.

The device contains a controlled shaper 1 of high-frequency magnetization current connected by an output to the first input of node 2 of a horizontal magnetic recording-reproducing rotating heads, which is connected by a second input to an input bus

3 calibration signal and connected by other inputs to the source outputs

4 signal bias current level. The outputs of the source 4 signal of the bias current level are connected to the inputs of the switch 5, which is soy. There are other inputs to the outputs of the block 6 for storing the reproduced bias current level signal for each rotating head. The unit 6 for storing the reproduced signal of the current level of the magnetized dp of each rotating head is connected to a control input to the output of the driver 7 of the signal max.

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The value of the reproduced control signal and is connected by information inputs to the outputs of the reproduced signal of the current magnetised by the node 2 of the horizontal magnetic recording-reproduction by rotating heads. This input of the 7 of the maximum value of the reproduced control signal is connected to the output of the reproduced control signal of the node 2 by the horizontal Magnetic recording. rotating heads, and the controlled driver 1 of the high-frequency bias current is connected n high-frequency bias current level control inputs with switch outputs 5.

The setting of the mode of lowercase magnetic recording by rotating heads according to the proposed method is as follows.

By means of the horizontal magnetic recording-reproduction node 2, the rotating heads pre-record the pilot signal received on the input bus 3 of the pilot signal. In this case, the pilot signal recording mode is changed by each rotating head due to the change; the high-frequency bias current level determined by the high frequency bias current driver 1 controlled by the driver / the high frequency bias current controlled by the driver modifies the high frequency bias current level according to the bias current level signal received through the switch 5 from the source 4 signal of the external synchronizer line; In the process of changing the control signal recording mode, each rotating head uses a horizontal magnetic recording-reproduction node 2 rotating heads to also record the bias current level signal supplied from source 4 of the bias current level signal to each rotary head.

By means of the node 2 of the lowercase magnetic recording-reproduction, the rotating heads reproduce the control signal and the signal of the bias current level recorded at the preliminary

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Recording In the process of reproducing the pilot signal, the reproduced signal of the bias current level is memorized at the maximum value of the reproduced pilot signal. The storage of the reproduced bias current level signal is provided by the unit 6, which stores the reproduced bias current level signal for each rotating head according to the signal of the maximum reproduced control signal generated for each rotating head by the driver 7. the maximum value of the reproduced I control signal. According to the bias current level signal at the maximum reproduced control signal from the outputs of the reproducing unit 6, the reproducing signal of the bias current level for each rotating head, the high frequency bias current level is set at the recording mode setting for each rotating head. The high-frequency bias current level is set for each rotating head by the high-frequency bias current I driver when the reproducing unit 6 has a negative bias current level signal for each rotating head through the switch 5.

The use of the invention makes it possible to significantly speed up the process of setting the line magnetic recording mode by rotating heads without reducing the installation accuracy.

Claims (1)

Invention Formula The method of setting the line magnetic recording mode by rotating heads by changing the control signal recording mode by each rotating head, reproducing the control signal and setting the subsequent lock mode for each rotating head according to the maximum level of the reproduced control signal, which in order to accelerate the mode setting line magnetic recording without reducing the accuracy of the installation, when changing the mode the pilot signal recordings of each rotating head produce a change in its high-frequency bias current level and record the bias current level signal, and in the process of reproducing the control signal, at a maximum value of the reproduced control signal, for each rotating head, the reproduced bias current level signal is memorized current level of high-frequency bias when setting the subsequent recording mode of each rotating head ki