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Front Panel Display at a Glance
Voltage and current
Displays the actual output voltage and current
measurements
Operating mode
Indicates one of the following:
OFF = the output is off
CV = the output is in constant voltage mode
CC = the output is in constant current mode
CP+ = the output is disabled by the positive power limit
CP– = the output is disabled by the negative power limit
VL+ = the output is in positive voltage limit mode
CL+/– = the output is in positive or negative current limit mode
T-on = the output is turning on
T-off = the output is turning off
OV = the output is disabled by the over-voltage protection
OV– = the output is disabled by the negative over-voltage protection
OC = the output is disabled by the over-current protection
OT = the over-temperature protection has tripped
PF = the output is disabled by a power-fail condition
P = the instrument has been paralleled with another instrument
Inh = the output is disabled by an external inhibit signal
Unr = the output is unregulated
Prot = the output is disabled by a protection condition on another unit
EDP = the output is disabled by excessive output dynamics protection
IPK+/– = the output is in positive or negative peak current limit
CSF = a current sharing fault has occurred
PSP = a primary/secondary protection has occurred
SDP = A safety disconnect system fault has occurred
UV = the output is disabled by the under-voltage protection
LOV+/– = the output voltage has exceeded a positive or negative internal limit
DOV+/– = a DUT-applied voltage has exceeded the positive or negative voltage limit
OCF+/– = the positive or negative internal current limits are exceeded - possibly due
to a DUT-applied voltage that has exceeded the positive or negative voltage limit
Voltage and current
Displays the programmed voltage and current. These settings may not match the measured
settings
output voltage or current. For example, in constant voltage operation, the output current setting
(limit) may be set to 1 A, but the actual (measured) output current must be less than 1 A for the
output to remain in constant voltage mode. If the Current limit is reached, the output will no
longer be operating in constant voltage mode, but will be in current limit mode. In this case, the
actual output voltage will now be less than the output voltage setting.
Keysight RP7900 Series Operating and Service Guide
1 Quick Reference
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