Selecting External Analog Control
The analog interface board (option AC68ALGU) supports two external analog programming methods, EXT-AC and
EXT-DC.
EXT-AC
In EXT-AC mode, the unit exhibits variable AC gain controlled by an external DC signal. The only part of the Settings
field that is functional is the frequency, as shown below.
EXT-DC
In EXT-DC mode, the unit acts as a DC-coupled power amplifier. The Settings field is not functional; it simply reads
EXT-DC, as shown below.
Range Selection with EXT-AC and EXT-DC
In EXT-AC and EXT-DC modes, you may choose the low or high range, but not autoranging. If autoranging is
selected before the instrument enters EXT-AC or EXT-DC mode, the present range is retained.
Keysight AC6800 Series Operating and Service Guide
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