Using A Test Signal (Generator/Oscillator) - Roland VM-C7100 Owner's Manual

Chapter 9 Using the Spectrum Analyzer

Using a test signal (generator/oscillator)

By playing reference signals into an acoustic space—such as a concert hall or control
room—and analyzing them, you can determine the frequency characteristics of the
space. For this purpose, the built-in analyzer has a noise generator/test oscillator.
You can select the type of waveform to be generated—pink noise, white noise, or
sine wave at a specified frequency.
Selecting and generating a reference signal
1. Press [ANALYZER/OSC/GEN].
This calls up the ANALYZER screen's VIEW page.
2. Press [F4] to select the desired type of reference signal.
PINK:
WHITE:
SINE:
3. Turn the V5 knob (OSCILLATOR BAND) to select a sine-wave frequency.
This setting applies only to a sine-wave reference signal.
4. Press [F6] (ON) to turn on the reference signal.
5. Turn the V6 knob (LEVEL) to set the reference signal's level.
fig.09-04
Fine-tuning of the sine wave frequency
1. Switch to the GEN/OSC page.
From the VIEW page above, press [PAGE DOWN] several times.
2. Use CURSOR [UP] or [DOWN] to cursor to SINE WAVE FREQ in the
middle of the display.
The V1 knob (BAND) serves the same purpose as the V5 knob on the VIEW page.
You can also use the V2 knob (REF) to select a frequency in finer Hz increments.
3. Select the sine wave frequency.
Press either [F1] (BAND) or [F2] (REF) to determine at which frequency reference
signals are generated.
fig.09-05
186
Noise in which all frequencies are produced at a equal level on
display.
Noise in which all frequencies are produced at a perceptually equal
level.
Sine wave containing only the specified frequency.
Generator (p. 237)
Oscillator (p. 241)
If you don't hear the
reference signal, check
generator/oscillator's
OUTPUT ASSIGN setting
(p. 187).
You can also select the
desired signal type from
here by using CURSOR
[UP] to set WAVEFORM to
pink noise, white noise or
sine wave.