 This series of commands are used to select the waveform shape.
NOISe: noise
PULSe: pulse
RAMP: ramp waveform
SINusoid: sine waveform
SQUare: square waveform
ARBitrary: arbitrary waveform
 <freq>: sets the frequency of the specified waveform (this parameter is not
available for Noise waveform). By default, the unit is Hz.
<amp>: sets the amplitude of the specified waveform. By default, the unit is
Vpp.
<offset>: sets the DC offset of the specified waveform. By default, the unit is
V
DC
.
<phase>: sets the start phase of the specified waveform (this parameter is not
available for Noise waveform). By default, the unit is degree (°).
 This series of commands allow users to omit one or multiple parameters. When
all the parameters are omitted, the commands only configure the specified
function/arbitrary waveform generator channel to the specified waveform,
without modifying the corresponding parameters.
 The four parameters <freq>, <amp>, <offset>, and <phase> should be
appeared in sequence. In the command, the parameters are configured in
sequence, and you are not allowed to set the latter parameter without setting
the former one. For example, you cannot set the parameter <amp> directly by
omitting the parameter <freq>.