Chroma 6430 - 6.5 Command Reference

Programmable AC Source 6430/6420/6415 User‘s Manual
(1) FREQ 120;VOLT 110 <PMT> will set the frequency to 120Hz and voltage to 110
Volt. Note that FREQ 120 does not change the header path to FREQ:CW.
(2) VOLT:LEV 110;RANG 150 <PMT> will set the rms output voltage to 110 Volt and
the output voltage range to 150V range.
6.5 Execution Order
The AC source executes program messages according to the order received. Program message
units are executed in the order of reception except coupled commands. The execution of
coupled commands are deferred until program message terminator is received. A coupled
command sets the parameters which are affected by the setting of other commands. Problems
will arise, because the prior state of the AC source may affect the response to the programming of
a coupled parameter.
For example, assuming the current output voltage range is 150V, and a new state is desired with
output voltage range of 300V as well as amplitude of 220V. If the commands
VOLTage 220<PMT>
VOLTage:RANGe 300<PMT>
are sent, a data out of range error will occur. Such an error can be avoided by reversing the
order, or sending the commands in one program message. For the above case, the program
message
VOLTage 220;VOLTage:RANGe 300<PMT>
can be sent without making a mistake.
The following commands are coupled:VOLTage,VOLTage:RANGe, VOLTage:RANGe:AUTO,
VOLTage: LIMit, VOLT:EPRogram.
6.6 The Commands of the AC Source
6.6.1 Command Tree Table
MEASure|FETCh
[:SCALar]
:CURRent
:AC? Returns the output AC rms current
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