User manual

Part 6: IEEE 488.2 Command Reference
OFFSET_CONSTANT, OFCT
Description
As you change the gain, this command allows for keeping the vertical offset level indicator stationary
(when DIV is selected) or to have it move with the actual voltage level (when VOLTS is selected). The
advantage of selecting DIV is that the waveform remains on the grid as the gain is increased; whereas,
with VOLTS selected, the waveform could move off the grid.
Regardless of which is selected, the Offset value shown on the oscilloscope Channel setup dialog is always
given in volts. However, DIV is selected for the Offset Control, the offset in volts is scaled proportional to
the change in gain, thereby keeping the grid placement constant.
Command Syntax
OFFSET_CONSTANT <constant>
<constant>:= {VOLTS, DIV}
Query Syntax
OFCT?
Response Format
OFCT VOLTS
Example (GPIB)
CMD$ = "OFCT VOLTS": CALL IBWRT(SCOPE%, CMD$)
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