About trigger

Hello
I am trying to use the trigger input for TTL signals to synchronize STG 4004 with a NI data acquisition system. The problem is that the logic state of 1 of STG4004 is between 2V and 3.3V, while the digital output of the NIsystem is a 5V TTL signal. I wonder if I can contact two instruments directly, or coild you please give some advices on contacting them. Thank you.

Am I getting this right, you want to use the Trigger In of the STG, and deliver a TTL of 5V to it? If so, that's no problem, the Trigger In will accept 5V. It's only that the Sync Out channels of the STG produce 3.3V TTL pulses.

Regards Frank