From the remote interface, you can set the starting phase in degrees
or radians using the UNIT:ANGL command.
From the front panel, the starting phase is always displayed in
degrees (radians are not available). If you set the starting phase in
radians from the remote interface and then return to front-panel
operation, you will see that the 81150A / 81160A converts the phase
to degrees.
For sine, and arb waveforms, 0 degrees is the point at which the
waveform crosses zero volts (or the dc offset value) in a positive
going direction. For arbitrary waveforms, 0 degrees is the first
waveform point downloaded to memory. The burst phase has no
effect on pulse, ramp, square, or noise waveforms.
The burst phase is also used in the gated burst mode. When the gate
signal goes inactive, the current waveform cycle is completed and
then the 81150A / 81160A stops. The output will remain at the
voltage level corresponding to the starting burst phase.
To set the burst phase, press the Start Phase softkey and then use the knob
or numeric keypad to enter the desired phase in degrees.