Specifications

301/302 User Manual

Continuous Mode

In normal continuous mode, the selected waveform is generated

continuously at the selected frequency, amplitude and offset.

Triggered Mode

In triggered mode, the Model 301/302 circuits are armed to generate

one output waveform. The trigger circuit is sensitive to transitions at

the trigger input. Select between positive or negative transitions to

trigger the instrument. You may also program the trigger level to the

desired threshold level. When triggered, the generator outputs one

waveform cycle and remains idle at the last point of the waveform.

The Model 301/302 can be armed to receive a trigger signal from a

front panel connector or from a GPIB command or from an internal,

programmable trigger generator.

The trigger signal, whether it comes from the front panel or from the

GPIB interface, has to pass through some electrical circuits. These

circuits cause a small delay known as system delay. System delay

cannot be eliminated completely. It is, however, minimized in the

Model 301/302 to approximately 100 ns maximum. System delay is a

factor that must be considered when applying a trigger signal. It

defines how long it will take from a valid trigger edge to the moment

that the output reacts.

Burst Mode

The burst mode is an extension of the triggered mode where the

Model 301/302 can be programmed to output a pre-determined

number of waveforms. The source to trigger the counted burst cycle

can be selected from a front panel connector, GPIB trigger or from the

built-in trigger generator.

Gated Mode

In gated mode, the Model 301/302 circuits are armed to generate

output waveforms as long as a gating signal is present. Unlike the

triggered mode, the gated mode is level sensitive. When the gating

signal goes low, the waveform at the output connector is first

completed and the output goes to an idle state. The idle amplitude

level, after the gating signal goes low, is the last point on the

waveform.

Output Type

The Model 301/302 can output three types of waveforms: standard

(Fixed), arbitrary (User) and sequenced waveforms. Different

waveform types may be assigned to each channel. Description of the

various waveform types that the Model 301/302 can generate is given

below.

Getting Started