Source Mode Operation 
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reverse phase and multi-channel, which can be selected by the user through the 
panel menu. 
Under the reverse mode, the rated voltage will be extended to 200%. 
The multi-channel function allows users to test 3 independent DUT at the same 
time without adding additional hardware configuration. 
The operation steps are as follows. 
1.  Press [Shift] +    (System) enter to system menu. 
2.  Under the Source setting interface, touch the screen or rotate the knob to 
select the Phase and set the power supply phase mode. 
Single Phase 
Under the single phase, the power supply works as a single phase power supply. 
the output mode can be set to AC/DC/ACDC/DCAC. 
Three Phase 
Under the three phase mode, the power supply works as a three phase power 
supply. the output mode can be set to AC/ACDC. 
Reverse Phase 
Under  the  reverse  phase,  the  power  supply  works  as  a  single  phase  power 
supply, and the rated voltage will be extended to 200%. For example, AC power 
supply rated voltage is 350V, under the reverse phase mode, the reted output 
voltage is 700V. And the output mode can be set to AC/DC/ACDC/DCAC. 
Multi-channel 
Under the Multi-channel phase, the power supply works as a single phase power 
supply and have three channels. 
The  multi-channel  function  of  the  IT7900  series  allows  users  to  test  3 
independent  DUTs  at  the  same  time  without  adding  additional  hardware 
configuration. In the traditional solution, the user needs to configure 3 AC power 
supplies; and one IT7900 device can meet multi-channel testing requirements. 
Under  multi-channel  mode,  parameters  of  each  channel  can  be  set   
independently. The output mode can be set to AC/DC/ACDC/DCAC. 
5.3 Select the Output Mode 
The IT7900P series has four output modes: AC, DC, AC+DC, DC+AC. It not only 
provides  pure  AC/DC  output,  but  also  can  use  AC+DC  and  DC+AC  output 
modes to realize "AC output plus DC bias" And "DC output waveform with ripple", 
which cover a wider range of applications. 
The output mode can be select in the system menu. 
1.  Press [Shift] +    (System) enter to system menu. 
2.  Under the Source setting interface, touch the screen or rotate the knob to 
select the [Output couple mode] and set the output mode. 
5.3.1 AC Output Mode 
If the output mode select to AC Mode, the instrument will  simulate AC power