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

Overview and Features

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