Instrument Configuration
3
Keysight U8903A User’s Guide
75
The Ranging circuit conditions the signal to as close to the full scale of the
analog-to-digital converter (ADC) as possible, optimizing the measurement
dynamic range. The 24-bit ADC then converts the analog signal to its digital form
and sends it to the digital signal processor (DSP). Inside the DSP, the digital signal
may optionally pass through a combination of up to three digital filters, one each
from the low pass, high pass, and weighting filter groups before sending it to the
measurement section.
Signal generation
The DSP generates all the required waveforms, except for square wave, digitally.
The digital waveform data is streamed realtime into the 24-bit digital-to-analog
converter (DAC) where it is converted to voltage and sent to the output
conditioning block to be amplified or attenuated to the required amplitude.
Finally, the waveform is routed through either the Balanced (XLR) or Unbalanced
(BNC) output signal connectors to the unit-under-test (UUT).
Summary of Contents for U8903A
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