App-17
IM DLM5058-03EN
Appendix
App
Signal Flow of the Instrument
The signals received through the signal input terminals are first applied to the vertical control
circuit consisting of attenuators (ATT) and pre-amps (AMP). At the attenuators and pre-amps, the
input signal amplitude is adjusted according to the input coupling, probe attenuation, voltage scale
(SCALE), offset voltage, and other settings.
The adjusted input signals are then applied to the A/D converters. At the A/D converters, the voltage
levels are converted into digital data.
The digital data undergoes digital filtering as well as sampling and envelope processing at the
sample rate corresponding to the time scale setting (TIME/DIV) in the data processing circuit.
Then, the data is written in the acquisition memory. In addition, averaging and sorting of repetitive
samples are performed in the data processing circuit.
Here the data is converted into waveform display data by the data processing circuit, transferred to
the display processing circuit, and stored in the display memory.
The data stored in the display memory is displayed as waveforms on the LCD.
Appendix 3 Block Diagram
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