Maico MA 53 Operating Instructions Manual

Contents

Maico MA 53 Operating Instructions Manual Manual pdf 12 page image

Operating Instructions MA 53Geba_MA53_e_13a.doc 10 851 430/3 11/11selected. The frequency is changed with up , → and down ,  buttonsfor both channels together. The design of the MA 53 makes it easy to controllevel, signal presentation and frequency with one hand.3.3.1 Using the keyboard of the MA 53All main functions of the MA 53 aredirectly accessable by pressing a singlebutton. Not frequently used procedureslike the calibration of the speech sourceor the level step selection are hidden as a“second level function”. To select thisfunction just press the addressed buttonmore than two seconds. A user menu forthe customization of the MA 53 isavailable for advanced users (see chapter8).Following is the description of the mainandsecond level functions of eachbutton: left (blue) channel frequency up: change to next higher frequency left (blue) channel frequency down: change to next lower frequency left (blue) talk over microphone: switches on the talk over microphoneas long as the button is pressed. The level can be adjusted with theknobs  or ↕. The actual value is displayed in dBHL at the lower centerof the LCD-display . left (blue) channel receiver selector: changes the receiver from AC toBC or FF or INSERT (if option assembled). The lighted LED above showsthe current selection.2nd level: selects test mode HL, UCL, MCL for selected receiver FM - modulation (warble tone): changes test signal from pure tone towarble tone.2nd. Level: to enter the user menu press button during power on. left (blue) channel signal selector: changes the test signal from puretone to tape/CD or microphone or noise or switches the channel off.2nd. Level: Calibration of tape/CD or live voice microphone pulse tone: enables pulsing of pure tone or warble tone.2nd. Level: enter pulse tone menu: ABLB, DLI and SISI Test stim mode: changes the signal presentation from presenter tointerrupter mode.2nd. Level: enables interlock function. Pressing left  or right ↔ signalpresentation bar affects both channels.Picture 7 MA 53 keyboard