US 5,396,618 A · Self-diagnosing method for digital signal processing system

Abstract

A method of self-diagnosis in a digital signal processing system. The digital signal processing system comprises a digital signal processing apparatus which includes a plurality of electronic components for processing signals in a plurality of channels. An output of the digital signal processing apparatus is coupled to an input of the digital signal processing apparatus. A central processing unit causes one after another of the electronic components to generate a predetermined signal while the other electronic parts are in a condition for passing the predetermined signal therethrough. The CPU then checks whether or not the output of the digital signal processing apparatus is correct. When the output of the digital signal processing apparatus is not correct, the central processing unit outputs a unique reference number for the electronic component from which the predetermined signal was then generated. The reference number for the electronic component is visually indicated on a bar graph meter.

Claims13

Dependent claims

A method of performing a self-diagnosis in a digital signal processing system which includes a digital signal processing apparatus, the digital signal processing apparatus having plural input ports which correspond to respective signal processing channels of the apparatus, and an output port from which the apparatus outputs processed signals, the method comprising the steps of:

repeatedly generating a test signal within said digital signal processing apparatus,
selectively connecting said output port of said digital signal processing apparatus in sequence to said plural input ports of said digital signal processing apparatus and transmitting the test signal from said output port of said digital signal processing to said selected input port of said digital signal processing apparatus by way of a diagnosis loop provided between said output and input ports of said digital signal processing apparatus to effect a loop test of said digital signal processing apparatus;
processing data representative of a result of the test;
indicating the processed data on an indicator;
and
when the result of the test represents an error condition in an electronic component of said digital signal processing apparatus, providing to said indicator a reference number corresponding to said electronic component so that the reference number is indicated on said indicator.

3 more elements

A digital signal processing system having a self-diagnosing function, comprising:

a digital signal processing apparatus including a plurality of signal channels each made up of a plurality of electronic components for processing signals within the respective channel, each of said electronic components having a unique reference number;
means for coupling an output of said digital signal processing apparatus to an input of said digital signal processing apparatus;
control means for causing one after another of said electronic components to generate a predetermined signal while the other electronic components are in a condition for passing the predetermined signal therethrough, determining whether or not the output of said digital signal processing apparatus is correct and when the output of said digital signal processing apparatus is not correct, outputting the reference number of the electronic component which then generated the predetermined signal;
and
means for visually indicating the reference number of the electronic component.

2 more elements

Dependencies are inferred from the claim text.

Self-diagnosing method for digital signal processing system

Life of this patent

Self-diagnosing method for digital signal processing system

Life of this patent

Abstract

Claims13