Browse Prior Art Database

UNINTENTIONAL CHANGE OF VOLUME

IP.com Disclosure Number: IPCOM000009730D
Original Publication Date: 2000-Jan-01
Included in the Prior Art Database: 2002-Sep-13
Document File: 1 page(s) / 61K

Publishing Venue

Motorola

Related People

Wolfgang Brenner: AUTHOR

Abstract

This document describes the possibility to avoid via software unintentional mechanical change of volume.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 59% of the total text.

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0 M MO-LA Technical Developments

UNINTENTIONAL CHANGE OF VOLUME

by Wolfgang Brenner

ABSTRACT

  This document describes the possibility to avoid via software unintentional mechanical change of volume.

PROBLEM(S) TO BE SOLVED

  When strong vibrations occur (e.g. Mil-Std 810) the volume of the radio changes through slow tum- ing of the potentiometer.

PROPOSED SOLUTION TO THE PROBLEM(S)

Unintentional Change of Volume

  Use an endless poti (360") with switch as poten- tiometer, or a slotted disk with a photoelectric barri- er, like used in a computer mouse, under which you place a push-button on the printed circuit board used as power on/off switch.

  When a certain angle is reached with the rotary knob within a certain time (e.g. 20" in IOOmS), the supervising electronic will note that. It will change into the menu 'volume control'.

Change of Volume without Receiving Signal

  A test tone with different changing frequencies can be issued via the audio path of the radio which is equivalent to the normal receiving volume. At the same time the volume can be visualised as a bar dia- gram in the whole width of the display (if there is one), where otherwise channel and signalling data are shown.

  When the volume desired is reached you must confii this by pushing the on/off switch. The elec- tronic will confnm this by issuing a receipt tone and save the volume data at the same time in the EEP- ROM.

  After that, the radio will return to the menu pre- viously left.

Change of Volume in Rec...