JPH0216064U

JPH0216064U -

Info

Publication number: JPH0216064U
Application number: JP9300188U
Authority: JP
Priority date: 1988-07-15
Filing date: 1988-07-15
Publication date: 1990-02-01
Anticipated expiration: 2003-07-15
Also published as: JPH0714912Y2

Description

[Brief explanation of drawings]

第１図乃至第３図はこの考案に係るレベル装置
の実施例を示し、第１図はデジタル記録再生装置
などのレベル表示装置のブロツク図、第２図は入
力レベルとレベル表示器のレベルスケールとの関
係を示した特性図、第３図はレベル表示器の表示
図である。第４図は従来例のブロツク図である。主な番号の説明、２：ＡＤコンバータ、３：入
力側の短絡用スイツチ、４：オフセツト調整器、
５：信号処理回路、６：ＤＡコンバータ、８：ピ
ークホールド回路、９，１２：切換器、１０：第
１のレベルデータ変換回路、１１：第２のレベル
データ変換回路、１４：レベル表示器、１５：コ
ントローラ、１６：オフセツト調整用テストスイ
ツチ、１７：表示ドライブ回路、２０：レベル表
示部、２１，２２：表示バー形セグメント、２３
，２４：レベルスケール、２６：「ＴＥＳＴ」文
字表示。 1 to 3 show an embodiment of the level device according to this invention, FIG. 1 is a block diagram of a level display device such as a digital recording/reproducing device, and FIG. 2 shows an input level and a level scale of a level display device. FIG. 3 is a characteristic diagram showing the relationship between the levels and the level indicator. FIG. 4 is a block diagram of a conventional example. Explanation of the main numbers, 2: AD converter, 3: Input side short circuit switch, 4: Offset adjuster,
5: signal processing circuit, 6: DA converter, 8: peak hold circuit, 9, 12: switch, 10: first level data conversion circuit, 11: second level data conversion circuit, 14: level indicator, 15: Controller, 16: Offset adjustment test switch, 17: Display drive circuit, 20: Level display section, 21, 22: Display bar type segment, 23
, 24: Level scale, 26: "TEST" character display.

Claims

[Claims for Utility Model Registration] 1. An A/D converter having an output offset adjustment means, a peak hold circuit for peak holding this output digital signal, and a circuit for converting this peak hold level to display a predetermined level. In a level display device for a digital recording/reproducing device comprising a level data conversion circuit and a display device for displaying output data of the level data conversion circuit, the level data conversion circuit displays a level at a first level in a normal state. A data conversion circuit and the above A
A second level data conversion circuit for displaying a level during offset adjustment of the /D converter, and display means for the level display to display the offset output level, and a switch and a controller for performing offset adjustment. 1. A level display device for a digital recording/reproducing device, comprising a switch for switching between a first level data conversion circuit and a second level data conversion circuit. 2. The level display device according to claim 1, wherein the first and second level data conversion circuits are constructed from first and second ROM tables stored in program memory in a ROM. 3. The level display device according to claim 1, wherein during offset adjustment, display characters for confirming the offset adjustment operation are displayed on the level display. 4. The level display device according to claim 1, further comprising a switching means for short-circuiting the input terminals of the A/D converter, and switching means controlled by a controller during offset adjustment.