Stanford DS345 Function & Arbitrary Waveform Generator

Distributed only in Germany
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Key Facts

The DS345 is a full featured 30 MHz synthesized function generator. Using an innovative Direct Digital Synthesis (DDS) architecture, the DS345 provides outputs of high spectral purity, outstanding frequency and phase agility, and remarkably versatile modulation and arbitrary waveform capability.

Features Collapsed

  • Frequency output from 1 mHz to 30.2 MHz
  • 16,300 point arbitrary waveforms
  • Sine, square, ramp and noise output
  • 10 Vpp output into 50 W

Specifications

Model/Resolution 1 mHz  Freq
Sine 30.2 MHz
Square 30.2 MHz
Ramp 100 kHz

Key Facts

The DS345 is a full featured 30 MHz synthesized function generator. Using an innovative Direct Digital Synthesis (DDS) architecture, the DS345 provides outputs of high spectral purity, outstanding frequency and phase agility, and remarkably versatile modulation and arbitrary waveform capability. The standard waveforms - sine, square, ramp and triangle, are all available with 1 mHz frequency resolution. You can generate sine and square waves up to 30.2 MHz or ramps and triangles up to 100 kHz. All functions can be swept over their full frequency range both linearly and logarithmically. There is even a wideband 10 MHz white noise source. With direct digital synthesis, frequency changes are fast (only 25 ns) and are made with no loss of phase continuity.

Sales region only Germany

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

Features & Benefits

  • Frequency output from 1 mHz to 30.2 MHz
  • 16,300 point arbitrary waveforms
  • Sine, square, ramp and noise output
  • 10 Vpp output into 50 W
  • Phase continuous frequency sweeps
  • 1 mHz frequency resolution
  • AM, FM and phase modulation
  • Optional RS-232 and GPIB interfaces

Specifications

Frequency Range
Freq Resolution
Sine 30.2 MHz 1 mHz
Square 30.2 MHz 1 mHz
Ramp 100 kHz 1 mHz
Triangle 100 kHz 1 mHz
Noise 10 MHz (Gaussian weighting)
Arbitrary 10 MHz 40 MHz/n sample rate
Output
Source impedance 50 W
Grounding Output may float up to ± 40 V (AC + DC) relative to earth ground.
Amplitude
Range 0.01 to 10 Vpp (50 W ), 20 Vpp (Hi-Z)
Resolution 3 digits (DC offset = 0 V)
Sine wave accuracy
(0V DC Offset)
1 mHz-100 kHz 100 kHz-20 MHz 20 MHz-30.2 MHz
5 to 10 Vpp ± 0.2 dB ± 0.2 dB ± 0.3 dB
0.01 to 5 Vpp ± 0.4 dB ± 0.4 dB ± 0.5 dB
Square Wave Accuracy
1 mHz-100 kHz 100 kHz-20 MHz 20 MHz-30.2 MHz
5 to 10 Vpp ± 3 % ± 6 % ± 12 %
0.01 to 5 Vpp ± 5 % ± 8 % ± 15 %
Triangle, Ramp, Arbitrary Accuracy
± 3 % (>5 Vpp)
± 5 % (<5 Vpp)
DC Offset
Range ± 5 V (limited such that |VAC peak| + |VDC| <5 V)
Resolution 3 digits (VAC = 0)
Accuracy 1.5 % of setting + 0.2 mV (DC only)
± 0.8 mV to ± 80 mV depending on AC and DC settings
Sine Wave
Spurious components <-55 dBc (non-harmonic)
Phase Noise <-50 dBc in a 30 KHz band centered on the carrier, exclusive of discrete spurious signals
Subharmonic <-50 dBc
Harmonic distortion Harmonically related signals will be less than:
Level Frequency Range
<-55 dBc DC to 100 kHz
<-45 dBc 0.1 to 1 MHz
<-35 dBc 1 to 10 MHz
<-25 dBc 10 to 30 MHz
Square Wave
Rise/Fall time <15 nS (10 to 90 %), at full output
Asymmetry <1 % of period + 4 nS
Overshoot <5 % of peak to peak amplitude at full output
Ramps, Triangle and Arbitrary Waveforms
Rise/Fall time 35 ns (10 MHz Bessel filter)
Linearity ± 0.5 % of full scale output
Settling time <1 ms to settle within 0.1 % of final value at full output
Arbitrary Waveforms
Sample rate 40 MHz/N, N = 1 to 234-1
Memory length 8 to 16,300 points
Resolution 12 bits (0.025 % of full scale)
Phase
Range ± 7199.999 ° with respect to arbitrary starting phase
Resolution 0.001 °
Amplitude Modulation
Source Internal (sine, square, triangle, or ramp) or External
Depth 0 to 100 % AM or DSBSC
Rate 0.001 Hz to 10 kHz internal, 15 kHz max external
Distortion <-35 dB at 1 kHz, 80 % depth
DSB carrier <-35 dB typical at 1 kHz modulation rate (DSBSC)
External input ± 5 V for 100 % modulation, 100 kW impedance, 15 kHz BW
Frequency Modulation
Source Internal (sine, square, triangle, ramp or arbitrary)
Rate 0.001 Hz to 10 kHz
Span 1 mHz to 30.2 MHz (100 kHz for triangle, ramp)
Phase Modulation
Source Internal (sine, square, triangle, ramp)
Rate 0.001 Hz to 10 kHz
Span ± 7199.999 °
Frequency Sweep
Type Linear or Log, phase continuous
Waveform Up, down, up-down, single sweep
Time 0.001 s to 1000 s
Span 1 mHz to 30.2 MHz (to 100 kHz for triangle, ramp)
Markers Two markers may be set at any sweep point (TTL output)
Sweep output 0 to 10 V linear ramp signal, synchronized to sweep
Burst Modulation
Waveform Any waveform except noise may be burst modulated
Frequency Sine, square to 1 MHz; triangle, ramp to 100 kHz; arbitrary to 40 MHz sample rate
Count 1 to 30,000 cycles/burst (1ms to 500 s burst time limits)
Trigger Generator
Source Single, Internal, External, Line
Rate 0.001 Hz to 10 kHz internal (2 digit resolution)
External Positive or negative edge, TTL input
Output TTL output
Standard Timebase
Accuracy ± 5 ppm (20 to 30 °C)
Aging 5 ppm/year
Input 10 MHz/N ± 2 ppm. N = 1 to 8. 1 Vpp minimum input level
Output 10 MHz, >1 Vpp sine into 50 W
Optional Timebase
Type Ovenized AT-cut oscillator
Stability <0.01 ppm, 20 to 60 °C
Aging <0.001 ppm/day
Allan variance (1 s) <5x10-11
General
Interfaces Optional RS-232 (300 to 9600 Baud, DCE) and GPIB with DOS based
Arbitrary Waveform Software. All instrument functions are controllable over the interfaces.
Dimensions 8.5 " × 3.5 " × 13 " (W × H × L)
Weight 10 lbs
Power 50 W, 100/120/220/240 VAC, 50/60 Hz
Warranty One year parts and labor on any defects in material and workmanship.
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