Specifications

User Manual 301/302

Selecting the Trigger

Level

The trigger level command sets the threshold level at the trigger input

connector. Trigger level is adjustable from -10 V to +10 V with up to 4

digits of resolution. Trigger level resolution is always 10 mV. Use the

following command to set the trigger level for the trigger signal:

TRIGger:LEVel <value>

This sets the trigger level for the signal, which is applied at the TRIG

IN connector. The default value is 1.6 V so there is no need to modify

this value if you apply a TTL level signal to the trigger input.

The query:

TRIGger:LEVel?

queries the trigger level and returns a value in Volts.

In WaveWiz, enter the required trigger level in Volts in the data entry

box marked Trigger Level (v) on the Trigger Tab (see Figure 3.12).

Using the Soft

Trigger

The soft trigger command allows you to write a program that can

trigger the 301/302 directly from within your application. To use the

soft trigger command, place the instrument in TRIG:SOUR EXT mode.

Soft triggers are ignored in internal or external modes. Use the

following SCPI commands to trigger the instrument:

TRIGger

The IEEE-STD-488.2 common command *TRG has the same effect.

Use either command to trigger the Model 301/302 in Trigger, Burst or

Triggered Sequence Advance modes.

In WaveWiz a soft trigger is implemented by clicking on the

button on the Trigger tab.

Enabling the SYNC

Output

For safety reasons, the SYNC output default setting is OFF. Disable or

enable the SYNC output using the following command:

OUTPut:SYNC {OFF | ON}

When the SYNC output state is programmed to ON, the SYNC output

connector generates signals, which are triggered by signals selected

using the SYNC:SOUR command. In the OFF position, the SYNC

connector has no output. It is connected electrically to internal circuitry

at all times therefore, be careful not to apply voltage to the SYNC

Configuring The Instrument