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NOTES: 1. The power supply is assumed to be operating in constant voltage mode.
2. This example creates a 3-Ampere, 100-millisecond current pulse and performs a current measure-
ment during the first five milliseconds of the pulse.
list:cle
list:set:sample .0003125
list:curr 0;:list:dwell .030
list:sample:curr 16,3
list:CURR:appl level,.095,3
list:curr:apply level,.001,0
list:count 1
func:mode curr
curr 0
volt 10
outp on
curr:mode list
Meas:tran?
FIGURE B-3.
B.13 OUTPut[:STATe] COMMAND
Syntax:
Short Form: OUTP[:STAT] <boolean>
<boolean>=(0 or OFF, 1 or ON)
Description: Enables or disables the power supply output. The factory default for power-up is Local mode, the
output is on and the front panel controls affect the unit's operation; however note that the factory
default for power-up can be changed from the front panel (see PAR. 3.3.7). Upon entering Remote
mode, the output. status is not affected.
For passive loads, when OUTP OFF is executed, the programmed values of voltage and current
are saved, then voltage and current are programmed as follows: when the unit is operating as a volt-
age source, voltage is programmed to zero and current protect is programmed to a low value; when
operating as a current source, current is programmed to zero and voltage protect is programmed to a
low value. When OUTP ON is executed, the power supply output is restored to the previously saved
programmed values. The saved values of voltage and current can be viewed by VOLT? and CURR?
queries.
For active loads (inductive, capacitive, battery or other electronic loads) programming the appro-
priate settings for mode, voltage and current is recommended instead of using the OUTP OFF com-
mand. Follow the guidelines presented in Table 3-6 to understand how the unit responds to OUTP
OFF. Instead of using OUTP OFF, program the unit to current mode using the FUNC:MODE com-
mand, then program output current to zero. Related Commands: FUNC:MODE, OUTP?.
B-6
Clear list.
Establishes the sample timing. The value was determined by dividing the
sample time (0.005S) by the number of samples (16):
(0.005/16 = 0.0003125).
Establishes the list as a current list and sets dwell time for all points at 30
milliseconds.
Creates the sample of the waveform. The output level is 3 amperes and the
number of samples is 16.
Creates the initial part of the level. It is established by multiplying the time
per sample times the number of samples (16) and subtracting it from the
total time of the pulse(100 milliseconds):
[0.1 - (.0003125 x (16) ] = .0950000]
Creates the end of the current pulse.
Sets the number of loops to one. NOTE: Count MUST be set to 1 when
measuring a sample, otherwise error -100 "command error" will result.
NOTE: The following five commands execute the function:
Sets unit to constant current mode.
Sets current to 0 Amperes.
Sets voltage to 10 Volts.
Sets the output to ON.
Causes the list to be executed. Note that the four prior commands ensure
that the unit is working in current mode and has its output on before the
current pulse is sent.
After executing the list, this query returns the measured value of the sam-
ple. For example, assuming the unit output took 5 milliseconds to become 3
amperes, the returned value will be around 1.5 amperes: 1.5003E0 (1.5003
Amperes)
USING LIST COMMANDS TO MEASURE SAMPLE AT START OF PULSE
Long Form: OUTPut[:STATe] <boolean>
OUTP
BOP-1K 080709
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