3458A Datasheet, PDF (21/27 Pages) Keysight Technologies – Shattering performance barriers of speed and accuracy

Section 7: Digitizing
General Information
The Keysight 3458A supports three independent methods for signal digitizing. Each mehtod is discussed below to aid in selecting the
appropriate setup best suited to your specific application.
DCV
Standard DCV function.
This mode of digitizing allows signal acquisition at rates from 0.2 readings/sec at 28 bits resolution to 100 k read-
ings/sec at 16 bits. Arbitrary sample apertures from 500 ns to 1 sec are selectable with 100 ns resolution. Input
voltage ranges cover 100 mV to 1000 V full scale. Input bandwidth varies from 30 kHz to 150 kHz depending on the
measurement range.
DSDC
DSAC
Direct Sampling DC Coupled measurement technique.
Direct Sampling AC Coupled measurement technique.
In these modes the input is sampled through a track/hold with a fixed 2 ns aperture which yields a 16 bit resolution
result. The sample rate is selectable from 6000 sec/sample to 20 µs/sample with 100 ns resolution. Input voltage
ranges cover 10 mV peak to 1000 V peak full scale. The input bandwidth is limited to 12 MHz.
SSDC
SSAC
Sub-Sampling (Effective time sampling) DC Coupled.
Sub-Sampling (Effective time sampling) AC Coupled.
These techniques implement synchronous sub-sampling of a repetitive input signal through a track/hold with a 2 ns
sample aperture which yields a 16 bit resolution result. The effective sample rate is settable from 6000 sec/sample
to 10 ns/sample with 10 ns resolution. Sampled data can be time ordered by the instrument and output to the GPIB.
Input voltage ranges cover 10 mV peak to 1000 V peak full scale. The input bandwidth is limited to 12 MHz.
Standard DC Volts Digitizing (DCV Function)
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