Setting Functions; Function Type; Frequency - Stanford Research Systems DS360 Operating Manual And Programming Reference

3-4 Operation

Setting Functions

The following section describes how to set the parameters for the basic functions of the DS360, including
function type, frequency, amplitude, offset and function on/off.

Function Type

The DS360 output function type is selected using the [∧] up and [∨] down function
arrow keys. Press the appropriate key until the desired function LED is lit. The peak-to-
peak amplitude will remain the same between different functions. If the amplitude is
displayed in any other units, they will be adjusted to reflect a constant peak-to-peak
voltage. If the modify function is enabled and the type is incompatible with the new
function, the modify function will be changed to a legal value (the parameters will
remain unchanged).
The available functions are sinewaves, squarewaves, white noise, pink noise and two-
tones. Sinewaves and squarewaves are self explanatory. White Noise is a Gaussian
weighted distribution, filtered to 200 kHz and is flat in amplitude over that region. Pink
Noise extends from 10 Hz to 200 kHz with a -3 dB/octave amplitude response. There are
two types of 2-Tones; sine-sine 2-tones and sine-square 2-tones. To display the current
mode, press [SHIFT][T2 MODE]. To change modes, press the [>] right or [<] cursor
key, or turn the spin knob. When in 2-Tone, only one set of parameters (amplitude,
frequency) are available at a time. To toggle between displaying Tone 1 and Tone 2
parameters, press [SHIFT][T1/T2].

Frequency

To display the current output frequency, press the [FREQ] key. The frequency is
displayed in Hz or kHz, depending on which unit LED is lit. The DS360 has 6 digits of
frequency resolution or 10 mHz, whichever is greater. Any non displayed digits are
zeroed to avoid having slightly different output frequencies for a given display value.
The frequency ranges and resolution are shown in the table below.
Function
Sinewaves
Squarewaves
White Noise
Pink Noise
Sine-Sine Two-Tone
Tone1 & Tone2
Sine-Square Two-Tone
Tone1 (Sine)
Tone2 (Square)
DS360 Ultra Low Distortion Function Generator
Frequency Range of Functions
Frequency Range
0.01 Hz - 200.000 kHz
0.01 Hz - 200.000 kHz
200 kHz White Noise (fixed)
200 kHz Pink Noise (fixed)
0.01 Hz - 200.000 kHz
0.01 Hz - 200.000 kHz
0.1 Hz - 5.0 kHz
Frequency Resolution
0.01 Hz or 6 digits
0.01 Hz or 6 digits
0.01 Hz or 6 digits
0.01 Hz or 6 digits
2 digits