17
CR-LED Commands
5.1 LED:VOLTage 17
5.2 LED:CURRent 17
5.3 LED:RCOe 17
5.4 18
5.5 OCP[:STATe] <bool> 18
5.6 OCP:ISTart <NRf+> 18
5.7 OCP:IEND <NRf+> 18
5.8 OCP:STEP 19
5.9 OCP:DWELl <NRf+> 19
5.10 OCP:VTRig <NRf+> 19
5.11 OCP:RESult[:OCP]? 19
5.12 OCP:RESult:PMAX? 20
This chapter describes the LED analog function related commands. The user needs to set three parameters: Vo, Io, and
Rd Coe.. Where Io is the rated output current of the LED power supply under test; Vo is the forward working voltage
of the LED when the forward working current is Io, and it can be obtained from the VI curve in the LED specication.
The real load is the series connection of n LEDs, then Vo should be set to n times of the single-section parameter, or it
can be set to any value within the LED power supply output voltage range; Rd Coe. is the ratio of the series equivalent
resistance (Rd) to the total equivalent resistance (Vo/Io) of the LED load, that is, Rd Coe.= Rd/(Vo/Io). In series
applications, the Rd Coe. is only related to the selected LED’s VI curve, regardless of the number of series nodes.
5.1 LED:VOLTage
This command is used to set LED Vo.
Command Syntax LED:VOLTage <Nrf+>
Parameters 0.001 MAX
Example LED:VOLT 18
Query Syntax LED:VOLT?
Returned Parameters <NR2>
5.2 LED:CURRent
This command is used to set LED Io.
Command Syntax LED:CURRent <Nrf+>
Parameters 0 MAX
Example LED:CURR 0.35
Query Syntax LED:CURR?
Query Response <NR2>
5.3 LED:RCOe
This command is used to set LED Rd Coe..
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