Stanford DS345 30MHz Function Generator

The DS345 function generator from Stanford Research Systems is a full featured, 30MHz instrument that uses an innovative Direct Digital Synthesis (DDS) architecture. It generates many standard waveforms with excellent resolution (1µHz), and has versatile modulation capabilites including AM, FM, Burst, PM and frequency sweeps. It also generates arbitrary waveforms with a fast 40 Msamples/s update rate.

Features:

• 1µHz to 30.2MHz frequency range
• 1µHz frequency resolution
• Sine, square, ramp, triangle and noise
• Phase continuous frequency sweeps
• AM, FM, burst and phase modulation
• 16,300 point arbitrary waveforms
• 10MHz reference input
• Optional RS232 and GPIB interfaces

The DS345 function generator provides sine waves and square waves at frequencies up to 30.2MHz, and triangle and ramp waveforms up to 100kHz. The frequency resolution for all functions is 1µHz. In addition to the standard waveforms, the unit also provides a wideband (10MHz) white noise source.

Both the function output and a TTL SYNC output are available through floating, front-panel BNC connectors. Both outputs have 50 Ω output impedances and may be floated up to +/-40V relative to earth ground. The amplitude of all function outputs is adjustable from 10 mVpp to 10Vpp with 3-digit resolution, and can be displayed in Vp, Vpp, Vrms or dBm. In addition, standard TTL and ECL output levels can be selected.

Additional useful connectors are provided on the rear panel. A triger input is used to trigger arbitrary waveforms, modulation patterns, sweeps and bursts, while a TTL trigger output is provided to allow synchronisation of external devices to sweeps and bursts. A sweep output generates a 0 to 10V ramp synchronous with frequency sweeps. The sweep marker outputs allow specified portions of a frequency sweep to be highlighted on an oscilloscope.

A 10MHz read-panel input allows the DS345 to be synchronised to an external timebase. A 10MHz rear-panel output allows multiple DS345's to be phase locked.