Stanford Research DS345
Function and Arbitrary Waveform Generator, 30 MHz

Download Product Datasheet

Product Overview

RENT STANFORD RESEARCH SYSTEMS DS345 Function and Arbitrary Waveform Generator (call for availability)

The Stanford Research Systems (SRS) DS345 Function and Arbitrary Waveform Generator is a full-featured, 30 MHz instrument that uses an innovative Direct Digital Synthesis (DDS) architecture. It generates many standard waveforms with excellent frequency resolution (1 µHz), including: sine waves and square waves at frequencies up to 30.2 MHz, and triangle and ramp waveforms up to 100 kHz. In addition to the standard waveforms, the unit also provides a wideband (10 MHz) white noise source and has versatile modulation capabilities including AM, FM, Burst, PM and frequency sweeps. It also generates arbitrary waveforms with a fast 40 Msample/s update rate and 12-bit vertical resolution. A 10 MHz rear-panel input allows the DS345 to be synchronized to an external timebase. A 10 MHz rear-panel output allows multiple DS345's to be phase locked.

Features and Specifications of the SRS DS345 Function and Arbitrary Waveform Generator include:

• 1 µHz to 30.2 MHz frequency range
• 1 µHz frequency resolution
• Sine, square, ramp, triangle and noise
• Phase continuous frequency sweeps
• AM, FM, burst and phase modulation
• 16,300 point arbitrary waveforms
• 10 MHz reference input
• Optional RS-232 and GPIB interfaces
• Frequency Range:
• Sine: 
• Max Frequency:  30.2 MHz
• Resolution:  1 µHz
• Square: 
• Max Frequency:  30.2 MHz
• Resolution:  1 µHz
• Ramp: 
• Max Frequency:  100 kHz
• Resolution:  1 µHz
• Triangle: 
• Max Frequency:  100 kHz
• Resolution:  1 µHz
• Noise: 
• Max Frequency:  10 MHz
• Resolution:  (Gaussian weighting)
• Arbitrary:
• Max Frequency:  10 MHz
• Resolution:  40 MHz/n (sample rate)
• Output:
• Source Impedance:  50 O
• Grounding:  Output may float up to ±40 V (AC + DC) relative to earth ground
• Amplitude:
• Range:               0.01 to 10 Vpp (50 O), 20 Vpp (Hi-Z)
• Resolution:          3 digits (DC offset = 0 V)
• Sine Wave Accuracy (0 V DC offset):
• 5 to 10 Vpp: 
• ±0.2 dB (1 µHz to 20 MHz)
• ±0.3 dB (20 MHz to 30.2 MHz)
• 0.01 to 5 Vpp:
• ±0.4 dB(1 µHz to 20 MHz)
• ±0.5 dB (20 MHz to 30.2 MHz)
• Square Wave Accuracy:
• 5 to 10 Vpp:
• ±3 % (1 µHz to 100 kHz)
• ±6 % (100 kHz to 20 MHz)
• ±15 % (20 MHz to 30.2 MHz)
• 0.01 to 5 Vpp:
• ±5 % (1 µHz to 100 kHz)
• ±8 % (100 kHz to 20 MHz)
• ±18 % (20 MHz to 30.2 MHz)
• Triangle, Ramp, Arbitrary Accuracy:
• ±3 % (>5 Vpp)
• ±5 % (
• 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: 
• Phase Noise: 
• Sub-Harmonic: 
• Harmonic Distortion:
• • Level:
  • Level:
  • Level:
  • Level:
• Square Wave:
• Rise/Fall Time: 
• Asymmetry:  
• Overshoot:  
• Ramps, Triangle and Arbitrary Waveforms:
• Rise/Fall Time:  45 ns (10 MHz Bessel filter)
• Linearity:  ±0.5 % of full-scale output
• Settling Time: 
• 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: 
• DSB Carrier: 
• External Input:  ±5 V for 100 % modulation, 100 kO impedance, 15 kHz bandwidth
• 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 (1 µs to 500 s burst time limits)
• Trigger Generator:
• Source:  Single, Internal, External, Line
• Rate (Internal):  0.001 Hz to 10 kHz (2-digit resolution)
• External Trigger:  Positive or negative edge, TTL
• Output:  TTL level
• Standard Timebase:
• Accuracy:  ±5 ppm (20 °C 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 O
• General:
• Interfaces:  Optional RS-232 (300 to 19.2 kbaud, DCE) and GPIB with DOS based arbitrary waveform software (AWC). All instrument functions are controllable over the interfaces.
• Non-Volatile Memory:  Nine sets of instrument settings can be saved and recalled
• Power:  50 W, 100/120/220/240 VAC, 50/60 Hz

Click to see the other models of Stanford Research Function Generator