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MSD Software Manual PRELIMINARY Release Chapter 8 The Signal Generator.

8 The Signal Generator.

The Tone Generator menu controls all signal generator functions. To access

this menu press [SIG GEN] in ‘Full Feature Mode’.

Please note that the level and frequency for Pulse, EBU, Pink and White Noise

Test signals are set in the [SINE] menu.

The Test Signal Generator enables a low distortion signal to be fed into the

Audio Matrix just like any other external audio signal. This means that the

Signal Generator via the Audio Matrix can be set to output a test signal on any

physical output available on a MSD model.

The Signal Generator shows up in the Input Matrix line number #53,54 (Tone)

and can be treated just like any other source. In this way it is also possible to

feed the output from the Signal Generator directly to the PPM Meter or to any

of the other functions found in the MSD. For the MSD Models with no physical

outputs it is still possible to use the Signal Generator as an internal test

generator.

The active Test Signal is indicated by the highlighted green square.

To disable the signal generator on a destination, just select another source for

that destination.

8.1 Sine Wave Test Tone Generator. 

Enter the [SINE] menu to adjust the frequency and the amplitude for any of

the available test tones. Setting the frequency and amplitude is done by the

arrow [] / [] keys. The frequency can be set in the range of 31Hz to

19952Hz in predefined steps. The amplitude adjustments (measured in dBu)

are made in steps of +/-0.1dB, but adjustment speed can be increased by a

factor ten (+/-1.0dB) by pressing the [x10] key. If active, the [x10] highlighted

with a green square.

Note for PT0660M users: It is possible to adjust the frequency and output

level using the wheeler. Pressing the wheeler determines which value to be

adjusted. The [#2] key above the wheeler will toggle the [x10] option. The

[#1] key above the wheeler will exit the sine wave setup menu.

8.2 Pulse Modulation Tone Generator. 

The PULSE function changes the sine wave signal from the first channel (#53)

from the Sine Wave Generator into a ‘pulse’ (chopped sine wave). The second

channel (#54) from the Sine Wave Generator is not affected. The ‘Pulse’ and

‘Pause’ duration times is set in milliseconds using the arrow [] / [] keys.

Single millisecond increment adjustments are made by ‘clicking’ these keys.

For greater increments, keep the key pressed down.

The amplitude of the pulse signal is adjusted in the [SINE] menu. Please refer

to section 8.1 for information on how to do this.

Note for PT0660M users: It is possible to adjust the pulse and pause timing

using the wheeler. Pressing the wheeler determines which value to be

adjusted. The [#1] key above the wheeler will exit the pulse setup menu.

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