Agilent Technologies 54753A Programmer's Reference Manual page 20

Command
<source>
<number>
<float_value>
Function Commands
:FUNCtion{1 | 2}:VERSus <source>[,<source>]
Defines a function for an X-versus-Y display. The first operand defines the
Y axis and the second defines the X axis. The Y-axis range and offset are
initially equal to that of the first operand and can be adjusted with the
RANGE and OFFSET commands.
{CHANnel<number> | FUNCtion<number> |
RESPonse<number> | WMEMory<number> |
<float_value>}
For channels: an integer, 1 through 4, indicating the slot in which the channel
resides, followed by an optional A or B identifying which of two possible
channels in the slot is being referenced. For functions: 1. For waveform
memories (WMEMory): 1, 2, 3, or 4. For TDR responses: 1, 2, 3, or 4.
A real number.
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