User Manual

To activate this function, configure the settings below:

Configure → Config 2 → External Ref. → Level

Figure 48 - External Reference Voltage Function

13.1.1 AC Couple

AC couple is selected by setting: Configure → Config 1 → Couple → AC. The reference

voltage is proportional to the Instrument voltage.

1 Vdc reference voltage = 30 Vac Instrument

NOTE: Input voltage cannot exceed 0 to 10 V in AC couple mode.

13.1.2 DC Couple

DC couple is selected by setting: Configure → Config 1 → Couple → DC. The reference

voltage is proportional to the source voltage.

±1 Vdc reference voltage = ±42 Vac source

NOTE: Input voltage cannot exceed -10 V to +10 V in DC couple mode.

This function is not supported when Configure → Config 1 → Couple → AC+DC.

13.2 Trigger In

To activate the Trigger function, follow the settings: Configure → Config 2 → External

Ref. → Level.

This instrument has a trigger input on pin 17 of the digital IO interface. Trigger_in is high

at 5 V and low at 0 V. The Instrument will respond to the falling edge of Trigger_in and