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Remote Operation 79
the test query are described in Table 5-9. This test cannot be done from the front panel. To instruct the power supply to
carry out a self-test, send the following query and address the supply to talk:
TEST?
Calibration Mode Query. To be able to calibrate your power supply, the calibration mode (CMODE) must be turned on
(See Appendix A for a detailed description of the calibration procedure). To find out if the CMODE is on or off, send the
following query over the GP-IB and address the supply to talk:
CMODE?
The supply will respond with a ’’1" which indicates that CMODE is on or a "0" which indicates that CMODE is off.
DCPON. The DCPON command sets the state of all outputs at power-on. You can specify if the outputs wake up enabled
or disabled when the unit is turned on. To enable all outputs at turn-on send:
DCPON 1
To disable all outputs at turn-on send:
DCPON 0
Note that these commands set the output voltage to zero and the output current to a slightly positive value when the
OUTPUT OFF command is issued. Therefore, the constant voltage feedback loop is active and the outputs are in constant
voltage mode when programmed “OFF”.
Starting with firmware revision A.00.04 and later, two additional commands let you set the output current to a slightly
negative value when the OUPUT OFF command is issued, causing the outputs to be in constant current mode when
programmed “OFF”. The benefit of being in constant current mode when the output is off is that if the load impedance and
the voltage and current settings are such that the unit is forced into constant current mode at turn on, then the current
feedback loop will be active during the transition to OUTPUT ON, and there will be no output current overshoot due to
mode crossover.
To enable all outputs in constant current mode at turn on send: DCPON 2
To disable all outputs in constant current mode at turn-on send: DCPON 3