Series 2280 Precision DC Power Supply Reference Manual  Table of contents 
:TRACe[n]:TRIGger:CURRent[:LEVel] .................................................................................. 7-144 
:TRACe[n]:TRIGger:CURRent:STATe .................................................................................. 7-145 
:TRACe[n]:TRIGger:OCCur? ................................................................................................. 7-146 
:TRACe[n]:TRIGger:OFFSet ................................................................................................. 7-146 
:TRACe[n]:TRIGger:VOLTage:DIRection .............................................................................. 7-147 
:TRACe[n]:TRIGger:VOLTage[:LEVel] .................................................................................. 7-147 
:TRACe[n]:TRIGger:VOLTage:STATe .................................................................................. 7-148 
TRIGger subsystem ......................................................................................................... 7-149 
:TRIGger[:SEQuence[n]]:COUNt ........................................................................................... 7-149 
:TRIGger[:SEQuence[n]]:SAMPle:COUNt ............................................................................. 7-150 
:TRIGger[:SEQuence[n]]:SOURce ........................................................................................ 7-151 
  Troubleshooting guide ............................................................................................ 8-1 
Introduction .......................................................................................................................... 8-1 
Contacting support ............................................................................................................... 8-1 
What to do if the power supply does not turn on ................................................................. 8-2 
LAN troubleshooting suggestions ........................................................................................ 8-3 
Error summary ..................................................................................................................... 8-4 
  Next steps ................................................................................................................. 9-1 
Additional Series 2280 information ...................................................................................... 9-1 
  Maintenance ............................................................................................................. A-1 
Introduction .......................................................................................................................... A-1 
Line fuse replacement .......................................................................................................... A-1 
Upgrading the firmware ........................................................................................................ A-2 
From the front panel .................................................................................................................. A-3 
Perform DIN VDE 701 test ................................................................................................... A-4 
Cleaning the front-panel display .......................................................................................... A-4 
  Verification ............................................................................................................... B-1 
Overview .............................................................................................................................. B-1 
Test record ........................................................................................................................... B-2 
DC voltage setting accuracy with remote sense ........................................................................ B-3 
DC voltage setting accuracy without remote sense ................................................................... B-4 
DC voltage readback accuracy with remote sense ................................................................... B-5 
DC voltage readback accuracy without remote sense .............................................................. B-6 
DC voltage load regulation ........................................................................................................ B-7 
DC overvoltage protection ......................................................................................................... B-8 
DC current accuracy ................................................................................................................. B-9 
DC current readback accuracy ................................................................................................ B-10 
DC voltage line regulation ....................................................................................................... B-13 
DC current line regulation........................................................................................................ B-14 
DC current load regulation ...................................................................................................... B-14 
DC overcurrent protection ....................................................................................................... B-15 
Voltage noise at 20 MHz ......................................................................................................... B-16