Amplitude - Stanford Research Systems DS360 Operating Manual And Programming Reference

Frequency Range of Functions vs Sampling Frequency
Function
Sinewaves
Two-Tones
(Tone1 & Tone2)
The frequency of both Tone1 and Tone 2 may be set in the same manner as for normal
sines. To toggle between displaying Tone 1 and Tone 2 parameters, press
[SHIFT][T1/T2].
To set the frequency of a function, type the new value on the keypad and complete the
entry with the appropriate units (Hz, kHz). Or change the frequency by using the spin
knob. If too high a value is entered, the DS360 will beep and display "Range Err". If a
value less than 0.01 Hz is entered, the frequency is set to 0.01 Hz.
For output frequency settings only, the spin knob increment can set to a value other than
the normal single digit increment (set by the [>] right and [<] left cursor keys). To display
the step size mode, press [SHIFT][FSTEP ENA]. To toggle between the normal and the
special step size mode, turn the spin knob or press either of the cursor keys. To display
the current special step size, press the [SHIFT] [F STEP] keys. To set the special step
size, type a new value and complete the entry with the appropriate units (Hz, kHz). The
spin knob cannot be used to enter the step size.

Amplitude

To display the current amplitude, press the [AMPL] key. The amplitude may be set and
displayed only in % (percent) of full scale, since volts or other units have no meaning in
the digital format. The current units (%) will be indicated by the LED at the right of the
display. The amplitude resolution is 0.00001%, with a range of 0 to 100.00000%. To
change the amplitude, type a new value on the keypad, followed by [%]. Or use the spin
knob to modify the current value. The amplitude for the digital output is maintained
separately from those of the analog output functions, so that when changing between
digital and analog modes, the previous digital amplitude values will be recalled.
2-Tone Amplitude
The amplitudes of Tone1 and Tone2 are maintained separately from the sine amplitude
(i.e. when changing from another function to 2-Tone, the amplitudes will be the last 2-
Tone amplitudes set, not the amplitude value of the sine). The amplitude limits for 2 tone
are a function of the sum of the two amplitudes. {i.e. 0 ≤ (Amp1 + Amp2) ≤ 100 %}
Digital Sampling Frequency
The digital sampling frequency can be set to three values: 48.0 kHz, 44.1 kHz and 32.0
kHz. These correspond to frequencies commonly used for digital audio tape, compact
disks and computer digital audio applications.
To display the current sampling frequency, press [SHIFT] [DIG FREQ]. The message
"digF" will be displayed, followed by the sampling frequency in kHz. To change
sampling frequency, turn the spin knob to the left or right.
48 kHz
0.01 Hz - 20.0 kHz
0.01 Hz - 20.0 kHz
DS360 Ultra Low Distortion Function Generator
44.1 kHz
0.01 Hz - 20.0 kHz
0.01 Hz - 20.0 kHz
Digital Output
32 kHz
0.01 Hz - 14.5 kHz
0.01 Hz - 14.5 kHz
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