Phase-Lock Commands
This section describes the SCPI (Standard Commands for Programmable
Instruments) commands available to program the Phase-Lock assembly.
Refer to chapter 4 in the
HP 33120A User’s Guide for details on the
complete set of commands for the function generator.
PHASe:ADJust {<
radians>|MINimum|MAXimum}
Adjust the phase offset of the output waveform in radians. Select from
-2π radians to +2π radians. The default is 0 radians.
MIN = -2π radians.
MAX = +2π radians. [ Stored in volatile memory ]
• To specify phase in degrees instead of radians, specify “
DEG” following
the phase value as shown below:
"PHAS:ADJ -90 DEG"
• For sine, square, triangle, and ramp waveforms, 0 radians is the point
at which the waveform crosses zero volts (or the dc offset value), in a
positive-going direction. For arbitrary waveforms, 0 radians is the
first point downloaded to memory.
• This phase adjustment for phase-lock is independent of the burst
phase as set by the BM:PHAS command. See “Burst Modulation” in the
HP 33120A User’s Guide for more information on burst phase.
PHASe:ADJust?
Query the phase offset setting. Returns a value in radians.
PHASe:REFerence
Immediately set the zero-phase reference point. This command does not
change the phase offset as set with the PHAS:ADJ command, it only
changes the phase reference. This command has no query form.
Chapter 2 Remote Interface Operation
Phase-Lock Commands
18
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