Stanford DS335 Function Generator

3 MHz

Distributed only in Germany
This is a discontinued product
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  • Overview

Key Facts

The DS335 is a simple, low-cost, 3 MHz function generator designed for general benchtop or ATE applications.

Brief Description

Basic functions include sine, square (up to 3.1 MHz) and ramps and triangles (up to 10 kHz). You can set the frequency of any function with 1 mHz resolution.

Features Collapsed

  • Frequency output from 1 mHz to 3.1 MHz
  • Sine, square, ramp and noise output
  • 10 Vpp into 50 W, 20 Vpp into High-Z
  • Linear and log frequency sweeps

Specifications

Model/Resolution 1 mHz  Freq
Sine 3.1 MHz
Square 3.1 MHz
Ramp 10 kHz

Key Facts

The DS335 is a simple, low-cost, 3 MHz function generator designed for general benchtop or ATE applications. Based on a Direct Digital Synthesis (DDS) architecture, the DS335 includes features not normally found in function generators in this price range.

Sales region only Germany

For Stanford power supplies please see PS310, PS325, PS350.

Brief Description

A Versatile Function Generator

Basic functions include sine, square (up to 3.1 MHz) and ramps and triangles (up to 10 kHz). You can set the frequency of any function with 1 mHz resolution. Frequency accuracy is 5 ppm with the standard timebase and 2 ppm with the optional TCXO timebase. A 3.5 MHz gaussian white-noise generator is also provided.

All functions can be swept logarithmically or linearly in a phase-continuous fashion over the entire frequency range. A rear-panel SWEEP output marks the beginning of a sweep to allow synchronization of external devices. Both uni-directional and bi-directional sweeps can be selected, as well as single-shot and repetitive sweeps.

FSK Modulation

Both internal and external FSK modes allow the output frequency to be rapidly toggled between two preset values. Toggling is done either at a fixed, internal rate of up to 50 kHz, or externally via a rear-panel input.

Distortion Outputs

Outputs have the low phase noise inherent to DDS. Wideband amplifiers maintain good pulse response and provide low distortion. The result is an output capable of driving 10 Vpp into a 50 W load with only a 15 ns risetime, or 20 Vpp into a high-impedance load.

GPIB and RS-232

Both GPIB and RS-232 interfaces are available to provide complete control via an external computer. All instrument functions can be set and read via the computer interfaces.

Features & Benefits

  • Frequency output from 1 mHz to 3.1 MHz
  • Sine, square, ramp and noise output
  • 10 Vpp into 50 W, 20 Vpp into High-Z
  • Linear and log frequency sweeps
  • 1 mHz frequency resolution
  • FSK modulation
  • Optional RS-232, GPIB interfaces
  • Optional 2 ppm TCXO timebase

Specifications

Frequency Range
Freq Resolution
Sine 3.1 MHz 1 mHz
Square 3.1 MHz 1 mHz
Ramp 10 kHz 1 mHz
Triangle 10 kHz 1 mHz
Noise 3.5 MHz (Gaussian weighting)
Output
Source impedance 50 W
Grounding Output may float up to ± 40 V (AC+DC)
Amplitude
Range 50 mVpp to 10 Vpp (50 W), 100 mVpp to 20 Vpp (High Z)
Resolution 3 digits (DC offset = 0 V)
Offset ± 5 VDC (50 W), ± 10 VDC (High Z)
Offset resolution 10 mV (50 W), 20 mV (High Z)
Accuracy 0.1 dB (sine output)
Sine Wave
Spurious response <-65 dBc
Harmonic distortion DC to 20 kHz <-70 dBc
Harmonic distortion 20 kHz to 100 kHz <-60 dBc
Harmonic distortion 100 kHz to 1 MHz <-50 dBc
1 MHz to 3 MHz <-40 dBc
Phase noise <-60 dBc (30 kHz band centered on carrier)
Square Wave
Rise/Fall time (10 to 90 %) 15 ± 5 ns
Asymmetry 3 ns+1 %
Overshoot <5 %
Ramps and Triangles
Rise/Fall time (10 to 90 %) 100 ± 20 ns
Linearity ± 0.1 % of full scale
Settling Time 200 ns (0.5 % of final value)
FSK Modulation
Modes Internal, External
Max rate 50 kHz Internal
External FSK Input sampled every 25 ns
Sweeps
Type Linear and logarithmic
Type span Linear (full frequency range), log (6 decades)
Sweep rate 0.01 Hz to 1 kHz
Timebase accuracy
Standard ± 5 ppm (20 to 30 °C)
Optional TCXO, 2 ppm stability, 2 ppm aging (20 to 50 °C)
Connectors
Front panel
FUNC Function output
SYNC TTL level into 50 W
Rear panel
FSK input TTL
SWP/FSK out TTL
General
Interfaces Optional RS-232 (300 to 9600 Baud, DCE) and GPIB. All instrument functions are controllable over the interfaces.
Non-volatile Up to 9 sets of instrument settings may be stored and recalled
Dimensions 8.5 " × 3.5 " × 13 " (W × H × L)
Weight 8 lbs
Power 22 W, 100/120/220/240 VAC 50/60 Hz
Warranty One year parts and labor on any defects in material or workmanship.
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