Stanford Research DS360
Ultra-Low Distortion Function Generator, 1 Hz - 200 kHz

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Product Overview

RENT STANFORD RESEARCH SYSTEMS DS360 Ultra-Low Distortion Function Generator (call for availability)

The Stanford Research Systems (SRS) DS360 Ultra-Low Distortion Function Generator offers the performance of a low distortion analog source combined with the precision of direct digital synthesis (DDS) making it the ideal source for audio frequency applications.

Unlike conventional RC oscillators, the SRS DS360 Ultra-Low Distortion Function Generator uses digital signal processing and a precision 20-bit D/A converter to provide ultra low distortion over the audio frequency range. With its DDS architecture the SRS DS360 Generator has the features and flexibility of a contemporary synthesized function generator. Careful shielding and board layout keep the output noise to a minimum, making the SRS DS360 Generator the instrument of choice for audio research and development, manufacturing, and automated testing.

The SRS DS360 Generator is designed for bench-top use as well as automated testing. All functions and parameters are easily set using the front-panel keypad and spin knob. A wide variety of amplitude units can be selected. Front-panel outputs and dual banana jacks assure compatibility with any system. The SRS DS360 Generator is fully computer programmable, which is a feature seldom found in low-distortion sources. All instrument functions can be controlled or queried through the computer interfaces.

Features and Specifications of the SRS DS360 Ultra-Low Distortion Function Generator include:

• 10 mHz to 200 kHz frequency range
• Sine, square, white and pink noise
• 20 µVpp to 40 Vpp output range
• Linear and log frequency sweeps
• 25 ppm frequency accuracy
• Balanced and unbalanced outputs
• RS-232 and GPIB interface
• Waveforms:
• Sine: 
• Frequency Range:  0.01 Hz to 200.000 kHz
• Square: 
• Frequency Range:  0.01 Hz to 200 kHz
• Rise Time:  1.3 µs
• Even Harmonics:  < -60 dBc (to 20 kHz)
• White Noise: 
• Bandwidth:  DC to 200 kHz
• Flatness: 
• Crest Factor:  11 dB
• Pink Noise: 
• Bandwidth:  10 Hz to 200 kHz
• Flatness:  < 3.0 dB, 20 Hz to 20 kHz (measured using 1/3 octave analysis)
• Crest Factor:  12 dB
• Bandwidth Limited Noise: 
• Bandwidth:  100 Hz, 200 Hz, 400 Hz, 800 Hz, 1.6 kHz, 3.2 kHz, 6.4 kHz, 12.8 kHz, 25.6 kHz, 51.2 kHz, 102.4 kHz
• Center Frequency:  0 Hz to 200.0 kHz (200 Hz increments)
• Flatness (in band): 
• Crest Factor:
• • Baseband:  12 dB (0 Hz center frequency)
  • Non-Baseband:  15 dB
• Two-Tone:
• Type:  Sine-sine, sine-square
• Sine Frequency:  0.01 Hz to 200 kHz
• Square Frequency:  0.1 Hz to 5 kHz
• Square Resolution:  2 digits
• SFDR:  >90 dB
• Sine or Square Burst:
• On Cycles:  1/2, 1 to 65534 cycles
• Repetition Rate:  1 to 65535 cycles
• Triggering:  Internal, external, single-shot, externally gated
• Off Level:  0.0 % to 100.0 % (of on level)
• Off Resolution:  0.1 %
• Max Off Attenuation: 
• -90 dBc (1 kHz)
• -70 dBc (10 kHz)
• -50 dBc (100 kHz)
• White or Pink Noise Burst:
• On time:  10 µs to 599.9 s         
• Repetition Time:  20 µs to 600 s
• Triggering:  Internal, external, single-shot, externally gated
• Off Level:  0.0 % to 100.0 % (of on level)
• Resolution:  0.1 %
• Sine or Square Sweep:
• Type:  Linear or logarithmic
• Range:  0.01 Hz to 200.000 kHz
• Rate:  0.1 Hz to 3.1 kHz
• Resolution:  2 digits
• Flatness:  ±0.1 dB (1 %)
• Frequency:
• Resolution:  6 digits or 10 mHz (whichever is greater)
• Accuracy:  25 ppm (0.0025 %) + 4 mHz (20 °C to 40 °C)
• Amplitude:
• Unbalanced Outputs:
• 5.0 µVpp to 14.4 Vpp (50 O load)
• 5.0 µVpp to 20.0 Vpp (600 O load)
• 10.0 µVpp to 40.0 Vpp (Hi-Z load)
• Balanced Outputs:
• 10 µVpp to 28.8 Vpp (50 O load)
• 10 µVpp to 28.8 Vpp (150 O load)
• 10 µVpp to 40.0 Vpp (600 O load)
• 20 µVpp to 80.0 Vpp (Hi-Z load)
• Resolution:  4 digits or 1 µV, whichever is greater (Vpp or Vrms), 0.1 dB (dBm or dBV)
• Accuracy:  ±0.1 dB (1 %)
• Noise (Broadband):
• (for a 1 kHz sine wave into Hi-Z load)
• Offset:
• Unbalanced Output:
• 0 to ±7.4 VDC (50 O load)
• 0 to ±10.0 VDC (600 O load)
• 0 to ±20.0 VDC (Hi-Z load)
• Balanced Output:  Not active
• Resolution:  3 digits
• Accuracy (all except pink noise):
• 1 % ± 25 mV (Vp+offset > 0.63 V)
• 1 % ± 2.5 mV (0.63 V > Vp+offset > 0.063 V)
• 1 % ± 250 µV (63 mV > Vp+offset > 6.3 mV)
• 1 % ± 50 µV (Vp+offset < 6.3 mV)
• Accuracy (pink noise):
• 1 % ± 200 mV (Vp+offset > 0.63 V)
• 1 % ± 20 mV (0.63 V > Vp+offset > 0.063 V)
• 1 % ± 2 mV (63 mV > Vp+offset > 6.3 mV)
• 1 % ± 200 µV (Vp+offset < 6.3 mV)
• Outputs:
• Configuration:  Balanced and unbalanced
• Connectors:  Floating BNCs, banana plugs and XLR jack
• Source Impedance: 
• Balanced:
• 50 O ± 3 %
• 150 O± 2 %
• 600 O ± 1 %
• Hi-Z (50 O ± 3 %)
• Unbalanced: 
• 50 O ± 3 %
• 600 O ± 1 %
• Hi-Z (25 O ± 1 O)
• Floating Voltage:  ±40 VDC (max)
• Other Outputs:
• Sync:  TTL level (same frequency and phase as output)
• Burst Out:  TTL pulse marks burst (TTL high for ON time)
• Trigger/Gate In: TTL pulse starts sweep or burst TTL high activates gated burst
• Sweep:  TTL pulse marks beginning of sweep
• General:
• Computer Interfaces:  GPIB and RS-232. All instrument functions can be controlled.
• Power:  50 W, 100/120/220/240 VAC, 50/60 Hz

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