Method and apparatus for providing bandwidth extension and channel match for oscilloscopes

Apparatus, comprising:

• a signal acquisition device, having a plurality of channels for acquiring respective signals under test (SUT) and generating therefrom respective streams of acquired samples;
• a plurality of digital filters, each of said digital filters associated with a respective channel, for filtering respective acquired SUT samples;
• and
• a controller, for generating a display signal suitable for use by a display device, said display signal representing waveform imagery associated with at least one of said digitally filtered SUT sample streams, wherein said controller, in a first mode of operation, causes said digital filters to operate in a manner tending to equalize gain parameters of said plurality of channels.

A method, comprising:

• acquiring an analog signal under test (SUT);
• generating therefrom, a stream of acquired samples having associated with it a first bandwidth defining a nominal pass band;
• digitally filtering said acquired SUT samples for imparting a gain equalization function to said acquired SUT samples within a spectral region including and extending beyond said first bandwidth, wherein said spectral region including and extending beyond said nominal passband is defined by a second bandwidth;
• and
• generating a display signal suitable for use by a display device, said display signal representing waveform imagery associated with said gain equalized SUT.

In a signal acquisition device, having a plurality of channels for acquiring a respective plurality of analog signals under test (SUT), a method, comprising:

• generating from said acquired plurality of SUTs, respective streams of acquired samples;
• selectively imparting a channel matching function to said acquired SUTs;
• and
• generating a display signal suitable for use by a display device, said display signal representing waveform imagery associated with at least one of said digitally filtered SUT sample streams, wherein, in a first mode of operation, said digital filters operate in a manner tending to equalize gain parameters of said plurality of channels.