Panasonic VP-7721A Manual

4 G- 8 8-0 2 0 14. OPERATION4.1 OutlineThe functions of the VP-7721A axe based on the distortion meter thatlinks with the low-distortion oscillator as a source of measuringsignal for audio equipment. The distortion meter can operate as alevel meter and, in particular, operate as the S/N meter in theVP-7721A Descriptions on each operating procedure will appear asfollows.° Front panel (to be referred to the panel Section (Page)layout diagram at the end of this manual) . 4.2 (4-1)° Basic operation (first—time operation) ... 4.3 (4-7)° Warnings to be observed during actual measurement . 4.4 (4-21)° Distortion measurement using internal oscillator . 4.5 (4-29)0 Distortion measurement of an external source .. 4.6 (4-31)° Level measurement . 4.7 (4-32)° S/N measurement .. 4.8 (4-33)° Preset application .. 4.9 (4-34)° Remote control . 4.10 (4-34)Numbers in a circle in the panel layout diagram appear in Sections 4.2and other parts of this manual. Section 4.3 contains a description offull operation of this instrument for familiarization. Sections 4.5 andafter are written for readers who are familiar with the basic operationsin Section 4.3. Readers should review Section 4-3 and the descriptionof parts in Section 4-2 whenever necessary.jjj224.2 Description of the Front PanelSee the panel layout diagram at the end of this manual.(T) POWER switchPress this switch to turn on the VP-7721A and release it to turnoff.(?) FREQ RANGE LED 1SOne of the four LED’s lights to indicate, the selected frequencyrange. The frequency is indicated on the digital FREQUENCY/AMPLITUDE display (the units - Hz or kHz - are determined from theposition of the decimal point).4-1