How to synchronise between two SMUs; SMU1- Souce pulsing current to LED, SMU2- measure PD current when LED is On.

[Samaritan_828]

Hi all, I'm new in Labview and am working on a project to source a pulsing current to an LED and measure the PD current when the LED is on. Setup with 2x PXie-4139. Need help on how to synchronise between the two SMUs. Thanks. 

SMU1 - Souce pulsing current 

SMU2 - Source reverse bias voltage to PD and measure the current when LED is on. 

[santo_13]

Could you please share a signal diagram depicting the relationship between signals and timing?

I am trying to see if you need a reasonable or tight synchronization.

In the meantime, please do check out the Pulse Current example,

[Samaritan_828]

SMU1 - pulsing current source of 40mA with PW:50us, Period:25ms.

SMU source V and measure the PD current when LED is on.