NF DP420LS Instruction Manual page 56

3. Press the [Osc] soft-key and select [2:Source].
4. In the displayed selection box, select the desired signal source.
 Operation procedures by using shortcuts
1. +
Press the SHIFT key to enter the shift state (the SHIFT LED illuminates). When you press the 7
key of the numeric keypad during the shift state, the AC/DC mode is switched in the following
order: AC, ACDC, DC, AC. Some modes may be skipped and cannot be selected depending on
the signal source.
DP420LS/DP480LS
Switching the AC/DC mode
3.4 Using the Continuous Function
37