KEPCO BOP-GL 1KW, Руководство оператора

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B-26
BOP-1KW-GL 111315
FIGURE B-9. USING LIST:WAIT COMMANDS TO CONTROL GENERATION OF A WAVEFORM MEASURED BY
MULTIPLE EXTERNAL DEVICES USING THE LOW-GOING LEADING EDGE OF AN EXTERNAL PULSE
B.86 [SOURce:]VOLTage[:LEVel][:IMMediate][:AMPlitude] COMMAND
VOLT
Syntax: Short Form: [SOUR:]VOLT[:LEV][:IMM][:AMP] <exp_value>
Long Form: [SOURce:]VOLTage[:LEVel][:IMMediate][:AMPlitude] <exp_value>
<exp_value> = digits with decimal point and Exponent, e.g., 2.71E1 for 27.1
Description: Sets programmed voltage level at power supply output. This command programs output voltage
to a specific value; actual output voltage will depend on load conditions. If the value exceeds the max-
imum for the model being programmed, error message -222,”Data out of range” is posted in output
queue. When sent to a unit operating in current mode, this command also sets positive and negative
protections (VOLT:PROT) to the same value. (See example, Figure B-1.)
NOTES: 1. The power supply is assumed to be operating in constant voltage mode.
2. The WAIT commands provide a method to synchronize multiple instruments to a common con-
trol pulse. This example assumes BOP and a number of switching DVMs are connected to a
Unit Under Test (UUT). The DVMs are programmed to wait 1 millisecond after a low-going
edge is received from the host computer, then take a few measurements. The same low-going
edge is applied to the Trigger Input (pin 3 of the BOP Trigger Port); the negative-going edge of
this pulse will cause the BOP to increment the output to the next level. Thus, each time the host
computer issues a positive pulse, the BOP increments and the DVMs take measurements on
the trailing (negative-going) edge of the positive pulse. The positive pulse can be very short
(less than 2 microseconds) with this functionality.
3. The explanation below shows how each step of the list functions once the list is entered and
VOLT:MODE LIST (the last step) is executed.
LIST:CLE Clears the list.
LIST:VOLT:APPLY LEVEL,.001,0 Establishes the list as a voltage list, output set to 0V.
LIST:DWELL:POINTS? Returns 10. (Wait of 33 milliseconds uses 10 points.)
LIST:WAIT:LEDGE 0 Maintains output at 0V, waits for Input trigger to have a high to low
edge before proceeding.
--- Host computer issues high pulse. Input Trigger goes low at trailing (negative-going) edge of
pulse from host commuter and List proceeds to next point. One millisecond after pulse issued,
DVM takes measurements.
LIST:DWELL:POINTS? Returns the current point location (3). (Used for list:repeat.)
LIST:REPEAT 9,10,1.1,2.2,3.3,4.4,5.5,6.6,7.7
Repeats step 9 and 10 (list:volt:apply lev and list:wait:ledge),
except each pair is set to the voltage specified in the array. This
adds 14 points to the list and sets the output values of each pair to
be 1.1V, 2.2V, 3.3V, 4.4V, 5.5V, 6.6V and 7.7V.
LIST:COUNT 2 Implements the waveform through two loops of the data.
CURR 5;:OUTP ON Set output on, output current to 5A.
VOLT:MODE LIST Executes the above list. At each high-to-low transition of the Trigger
Port input, the BOP increases its output voltage in 1.1 volt incre-
ments. The duration of each increment is not controlled by the inter-
nal clock of the BOP, but instead by the high-to-low edge of the
pulse from the host computer.