Specifications

Operation 3-5
DS360 Ultra Low Distortion Function Generator
If the function is set to White Noise or Pink Noise the character of the noise is fixed,
unless a modification function is active. The frequency is not adjustable and displays
“noise”.
The frequency of both Tone1 and Tone 2 may be set. For Sine-Sine 2-Tones, both
frequencies are set the same as for normal sines, as is Tone1 for Sine-Square 2-Tones.
The squarewave in sine-square two-tones has limited frequency range and resolution. It
can be set from 0.1 Hz to 5.0 kHz with 2 digits of resolution (i.e. 4.9 kHz or 110 Hz, not
104 Hz).
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 0.001 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 in Vpp, Vrms, dBm, dBV and dB from a relative value. The current units are
indicated by the LEDs at the right of the display. dBm is defined as dB relative to 1 mW
of power into the selected source impedance. dBV is defined as dB relative to 1 Vrms
into the selected source impedance. (See the section on setting impedance and output
configuration for more detail).The amplitude resolution is 4 digits or 1 µV, whichever is
greater for Vpp and Vrms. For dBm, dB and dBV it is 3 digits or 0.1 dB, whichever is
greater.
The units of the amplitude display may be changed between Vpp, Vrms, dBm and dBV
without changing the amplitude by pressing the corresponding units key. When the
DS360 is switched from one function to another, the peak-to-peak amplitude remains the
same, but the values for other units will change to reflect the new function. To change
the amplitude, type a new value on the keypad, followed by the appropriate units (Vrms,
Vpp, dBm, dBV) key. Or use the spin knob to modify the current value. If the DS360s
attenuator setting changes, the output will briefly go to zero as the amplitude is changed.
2-Tone Amplitude
The amplitudes of Tone1 and Tone2 are maintained separately from the other function
amplitudes (i.e. when changing from another function to 2-Tone, the amplitudes will be
the last 2-Tone amplitudes set, not the value of the previous function). In addition to the
amplitude limits shown below, the amplitudes of Tone1 and Tone2 cannot differ by more
than 1:1000 or: