JPS5931767B2 - Head-type magnetic recording and reproducing device for both recording and reproducing purposes - Google Patents

Head-type magnetic recording and reproducing device for both recording and reproducing purposes

Info

Publication number
JPS5931767B2
JPS5931767B2 JP15456276A JP15456276A JPS5931767B2 JP S5931767 B2 JPS5931767 B2 JP S5931767B2 JP 15456276 A JP15456276 A JP 15456276A JP 15456276 A JP15456276 A JP 15456276A JP S5931767 B2 JPS5931767 B2 JP S5931767B2
Authority
JP
Japan
Prior art keywords
recording
signal
oscillator
level
head
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
JP15456276A
Other languages
Japanese (ja)
Other versions
JPS5377606A (en
Inventor
満 花島
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sony Corp
Original Assignee
Sony Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sony Corp filed Critical Sony Corp
Priority to JP15456276A priority Critical patent/JPS5931767B2/en
Publication of JPS5377606A publication Critical patent/JPS5377606A/en
Publication of JPS5931767B2 publication Critical patent/JPS5931767B2/en
Expired legal-status Critical Current

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  • Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)

Description

【発明の詳細な説明】 テープレコーダ(磁気記録再生装置)で録音、再生を行
う場合に、磁気テープの感度のばらつきを補正するため
に、所定レベルのトーン信号を録音、再生し、再生出力
のレベルが所定の値となるように録音レベルを調整する
ことが行なわれている。
[Detailed Description of the Invention] When performing recording and playback with a tape recorder (magnetic recording and playback device), in order to correct variations in the sensitivity of the magnetic tape, a tone signal of a predetermined level is recorded and played back, and the playback output is adjusted. The recording level is adjusted so that the level becomes a predetermined value.

この場合に、使用するテープレコーダがモニタヘッドを
有する3ヘッド形の装置であれば、録音しながら同時に
再生することができるので、上述のような調整を一時に
行うことができる。
In this case, if the tape recorder used is a three-head device having a monitor head, it is possible to simultaneously record and playback, so that the above-mentioned adjustments can be made at the same time.

ところが、録音、再生ヘッドが兼用の2ヘッド形の装置
の場合には、一旦録音を行い、その後テープを巻戻して
録音した部分を再生し、再生レベルの大小によつて録音
レベルを調節し、この状態で再び録音を行い、その後再
びテープを巻戻して2度目に録音した部分を再生し、こ
の再生レベルの大小によつて再び録音レベルを調節し、
この操作を繰り返して調整点に追い込んでいかねばなら
ず、調整に時間がかかると共に、最終的に完全な調整を
行うことが困難である。
However, in the case of a two-head device that serves as both a recording and playback head, the tape is first recorded, then the tape is rewound and the recorded portion is played back, and the recording level is adjusted depending on the playback level. Record again in this state, then rewind the tape again and play the second recorded part, adjust the recording level again depending on the level of this playback,
This operation must be repeated to reach the adjustment point, which takes time and makes it difficult to achieve complete adjustment in the end.

本発明はこのような点にかんがみ、2ヘッド形のテープ
レコーダにおいても、容易に録音レベルの調整が行える
ようにしたものである。
In view of these points, the present invention is designed to allow easy adjustment of the recording level even in a two-head tape recorder.

以下、図面を参照しながら、本発明の一実施例について
説明しよう。
Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

第1図において、1は記録信号が供給される入力端子で
、この端子1からの信号が、切換スイッチ2の音声信号
側接点A、可変抵抗器3、記録アンプ4、記録・再生切
換スイッチ5の記録側接点Rを通じて記録−再生兼用ヘ
ッド6に供給され、テープTに記録される。
In FIG. 1, 1 is an input terminal to which a recording signal is supplied, and the signal from this terminal 1 is transmitted to the audio signal side contact A of the changeover switch 2, the variable resistor 3, the recording amplifier 4, and the recording/playback changeover switch 5. The signal is supplied to the recording/reproducing head 6 through the recording side contact R, and is recorded on the tape T.

そして、このヘッド6からの信号がスイッチ5の再生側
接点P、再生アンプ8を通じて出力端子9に供給される
。また、11はトーン信号の発振器で、この発振器11
からの信号がスイッチ2のトーン側接点Tに供給される
と共に、可変抵抗器3に連動し、これと逆の特性を有す
る可変抵抗器12を通じて切換スイッチ13のソース側
接点sに供給され、またアンプ8からの信号がスイッチ
13の再生信号側接点Pに供給され、このスイッチ13
からの信号がアンプ14を通じてメータ15に供給され
る。
The signal from this head 6 is supplied to the output terminal 9 through the reproduction side contact P of the switch 5 and the reproduction amplifier 8. Further, 11 is a tone signal oscillator, and this oscillator 11
A signal from the switch 2 is supplied to the tone side contact T of the switch 2, and is also supplied to the source side contact s of the changeover switch 13 through a variable resistor 12 which is linked to the variable resistor 3 and has the opposite characteristics. The signal from the amplifier 8 is supplied to the playback signal side contact P of the switch 13, and this switch 13
A signal from the meter 15 is supplied to the meter 15 through the amplifier 14.

この装置において、基準となるテープを用いて可変抵抗
器3を中央位置としたときに、適正な録音レベルとなり
、メータ15が0を指すようにアンプ4、8、14の利
得及び発振器11の出力レベルをあらかじめ設定してお
く。次に調整を行なう場合には、まずスイッチ2を接点
Tに切換え、スイッチ5を接点Rに切換え、可変抵抗器
3を中央位置とした状態で発振器11からのトーン信号
を充分長い時間録音する。
In this device, when the variable resistor 3 is set at the center position using a reference tape, the appropriate recording level is obtained, and the gains of the amplifiers 4, 8, 14 and the output of the oscillator 11 are set so that the meter 15 points to 0. Set the level in advance. When making the next adjustment, first switch 2 to contact T, switch 5 to contact R, and record the tone signal from oscillator 11 for a sufficiently long time with variable resistor 3 in the center position.

その後、テープ7を巻戻し、スイツチ5を接点Pに切換
え、再生される信号をスイツチ13の接点Pを通じてメ
ータ15に供給する。この状態でスイツチ13を接点S
に切換えて発振器11からの信号をメータ15に供給す
る。
Thereafter, the tape 7 is rewound, the switch 5 is switched to the contact P, and the reproduced signal is supplied to the meter 15 through the contact P of the switch 13. In this state, switch 13 is connected to contact S.
and supplies the signal from the oscillator 11 to the meter 15.

ここで、発振器11からは録音時のレベルの信号が出力
されている。従つてこのようにスイツチ13を切換ると
、テープ7において録音・再生でレベルが変動した分だ
けメータ15の指針が変化する。そこで、この指針が一
致するように可変抵抗器12を調整する。このようにす
ると、例えばテープ7の録音・再生でαの減衰を生じて
いたとすると、スイツチ13を接点Pに接続した状態で
メータ15の指針は一αを小している。
Here, the oscillator 11 outputs a signal at the recording level. Therefore, when the switch 13 is changed in this manner, the pointer of the meter 15 changes by the amount that the level of the tape 7 changes during recording and playback. Therefore, the variable resistor 12 is adjusted so that these guidelines match. In this way, for example, if an attenuation of α occurs during recording and reproduction of the tape 7, the pointer of the meter 15 will be one α smaller with the switch 13 connected to the contact P.

これに対し、スイツチ13を接点Sに接続すると、発振
器11からは可変抵抗器12が中央位置においてメータ
15が0を指示する信号が供結されている。そこで、こ
の指針が一致するように可変抵抗器12を調整すると、
この可変抵抗器において、発振器11からの信号がα減
衰されることになる。
On the other hand, when the switch 13 is connected to the contact S, a signal is connected from the oscillator 11 indicating that the meter 15 indicates 0 when the variable resistor 12 is at the center position. Therefore, when adjusting the variable resistor 12 so that these guidelines match,
In this variable resistor, the signal from the oscillator 11 is attenuated by α.

ここで、可変抵抗器12と3とは逆に変化するように連
動されている。このため、土述のように可変抵抗器12
をα減衰するように調整すると、可変抵抗器3及びアン
ブ4においては、ゲインがα上昇するように調整が行わ
れることになる。従つて、この調整を行つた状態で記録
を行うと、ヘツド6に供給される信号は、レベルがα上
昇されており、この信号を録音・再生することにより、
再生時には、テープTのばらつきにかかわらず、所定の
レベルで再生を行うことができる。こうして、テープ感
度のばらつきの補正を行うことができるわけであるが、
本発明によれば、一回記録を行い、これを一回再生する
だけで調整を行うことができるので、極めて容易に調整
を行うことができる。
Here, the variable resistors 12 and 3 are linked to change in opposite directions. For this reason, as mentioned above, the variable resistor 12
When the gain is adjusted to be attenuated by α, the variable resistor 3 and amplifier 4 are adjusted to increase the gain by α. Therefore, when recording is performed with this adjustment made, the level of the signal supplied to the head 6 will be increased by α, and by recording and playing back this signal,
During reproduction, reproduction can be performed at a predetermined level regardless of variations in the tape T. In this way, it is possible to correct for variations in tape sensitivity, but
According to the present invention, adjustment can be made by recording once and reproducing it once, so adjustment can be made extremely easily.

また、メータ15の指針が一致するように調整を行うの
で、調整点ではメータ15の針が靜止することになり、
調整が容易であると共に、極めて正確な調整を行うこと
ができる。
In addition, since adjustment is made so that the needles of the meter 15 match, the needles of the meter 15 will stop at the adjustment point.
Adjustment is easy and extremely accurate adjustment can be made.

なお、上述の説明では、スイツチ13を手動で切換える
ようにしたが、適当な低周波数の非安定マルチバイブレ
ータ等を用いて、自動的に切換えるようにしてもよい。
In the above description, the switch 13 is manually switched, but it may be automatically switched using an appropriate low frequency unstable multivibrator or the like.

この場合に、スイツチ13の切換時の、信号の位相によ
り、過渡的なレベル変動が発生するおそれがあり、その
ため、再生信号の位相に応じて発振器11の出力信号の
位相を制御する必要がある。さらに、第2図に示すよう
に、再生信号と発振器11からの信号とをそれぞれ検波
回路21,22に供給して直流信号とし、これらの直流
信号を比較回路23に供給して、再生信号のレベルが大
のとき、再生信号のレベルが小のとき及び一致したとき
に対応する信号を得、この信号を表示装置24に供給し
て、可変抵抗器3,12のつまみを回すべき方向を示す
矢印24R,24L及び一致したことを示す点24Aを
表示するようにしてもよい。
In this case, there is a risk that transient level fluctuations may occur depending on the phase of the signal when the switch 13 is switched, so it is necessary to control the phase of the output signal of the oscillator 11 according to the phase of the reproduced signal. . Furthermore, as shown in FIG. 2, the reproduced signal and the signal from the oscillator 11 are supplied to detection circuits 21 and 22, respectively, to convert them into DC signals, and these DC signals are supplied to a comparator circuit 23, which converts the reproduced signal into a DC signal. When the level is high, a corresponding signal is obtained when the level of the reproduced signal is low and when they match, and this signal is supplied to the display device 24 to indicate the direction in which the knobs of the variable resistors 3 and 12 should be turned. Arrows 24R, 24L and a point 24A indicating a match may be displayed.

また、可変抵抗器3,12を無接点化し、土述の比較回
路23からの信号により、自動調整するようにしてもよ
い。
Alternatively, the variable resistors 3 and 12 may be made contactless and automatically adjusted based on the signal from the comparison circuit 23 described above.

さらに、発振器11の発振周波数を可変し、周波数特性
、イコライザ特性等の調整を行うこともできる。
Furthermore, the oscillation frequency of the oscillator 11 can be varied to adjust frequency characteristics, equalizer characteristics, etc.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は本発明の一例の系統図、第2図は他の例の系統
図である。 3,12は可変抵抗器、4,8はアンプ、11は発振器
、15はメータである。
FIG. 1 is a system diagram of one example of the present invention, and FIG. 2 is a system diagram of another example. 3 and 12 are variable resistors, 4 and 8 are amplifiers, 11 is an oscillator, and 15 is a meter.

Claims (1)

【特許請求の範囲】[Claims] 1 発振器を有し、この発振器からの信号を所定のゲイ
ンの記録アンプを通じて記録し、この記録信号を再生し
、この再生信号と上記発振器からの信号とのレベルを比
較し、これらのレベルが所定の関係になるように、上記
発振器からの信号のレベルを調整すると共に、この調整
に連動して、上記記録アンプのゲインを上記発振器から
の信号のレベルの調整と逆の関係になるように調整し、
記録レベルを調整するようにした録音再生兼用ヘッド形
磁気記録再生装置。
1 has an oscillator, records the signal from this oscillator through a recording amplifier with a predetermined gain, reproduces this recorded signal, compares the levels of this reproduced signal and the signal from the oscillator, and determines whether these levels are at a predetermined level. Adjust the level of the signal from the oscillator so that the relationship is as follows, and in conjunction with this adjustment, adjust the gain of the recording amplifier so that it has an inverse relationship to the adjustment of the level of the signal from the oscillator. death,
A head-type magnetic recording and reproducing device that can be used for both recording and reproducing purposes, with the ability to adjust the recording level.
JP15456276A 1976-12-21 1976-12-21 Head-type magnetic recording and reproducing device for both recording and reproducing purposes Expired JPS5931767B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15456276A JPS5931767B2 (en) 1976-12-21 1976-12-21 Head-type magnetic recording and reproducing device for both recording and reproducing purposes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15456276A JPS5931767B2 (en) 1976-12-21 1976-12-21 Head-type magnetic recording and reproducing device for both recording and reproducing purposes

Publications (2)

Publication Number Publication Date
JPS5377606A JPS5377606A (en) 1978-07-10
JPS5931767B2 true JPS5931767B2 (en) 1984-08-04

Family

ID=15586948

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15456276A Expired JPS5931767B2 (en) 1976-12-21 1976-12-21 Head-type magnetic recording and reproducing device for both recording and reproducing purposes

Country Status (1)

Country Link
JP (1) JPS5931767B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5783325A (en) * 1980-11-14 1982-05-25 Nikken Kogyo Kk Manufacturing method of casting scissors

Also Published As

Publication number Publication date
JPS5377606A (en) 1978-07-10

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