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MSD Software Manual PRELIMINARY Release Chapter 9 Utility Functions.

9 Utility Functions.

From the [UTILITY] menu four special functions are available. DMU-1630

Digital Audio Peak Meter, The Graphic LEQM, The session Log and a DCF-77

Radio Controlled Clock. Please note that the utility functions only support up to

8 input channels.

9.1.1 DMU-1630 Digital Audio Peak Meter. 

The MSD has included the DMU-1630 scale. The DMU-30 scale is a Digital

True-Peak scale with a range of -60dB to 0dB.

Just like any other scale selected from the [SCALE] menu the DMU-1630

scale offers [PEAK], [DUAL], [HOLD] and [RESET]. The DMU-30’s

[RESET] function is equal to the [CLEAR] function used by any of the 7

internal scales in the [METER] menu. Please refer section 9.2, 9.3 and 9.4 for

a description of these functions.

By pressing the [FINE] key the resolution of the DMU-1630 scale can be

reduced by a factor of ten for accuracy. If selected, the scale now has a range

of -6.0dB to 0.0dB. If disabled, a yellow line on DMU-1630 scale will indicate

the full scale level for the [FINE] mode. Because of the high resolution LCD

display used on the MSD, the actual scale resolution is VERY high. Far better

than the original DMU-30’s 0.1dB.

In [FINE] mode a yellow indicator can in either the top or bottom of the PPM

window indicate if a channel is in overload or underload.

Please see section 11.2 for information on how to change the reference-level

for the [FINE] mode.

The FINE mode differentiates from the standard DMU-2 scale by the capability

of setting the Reference level. The standard DMU-2 scale reference level is

fixed on digital full-scale.

The OVERS function will count the number of times the input samples reached

‘Digital Full-Scale’. To Clear and restart this counter press the [CLEAR] key.

9.1.2 Setting Reference and Overs for the DMU-1630 Scale.



Setting the DMU-1630 reference-level and OVERS-Reference count is

considered a critical setting and can therefore only be done when the MSD

Write-Protection are disabled. Please see section 3.4 on how to disable the

MSD Write-Protection.

When the MSD Write-Protection are disabled the [DMU1630] key in the

[UTILITY] menu will now access the DMU-1630 Setup menu instead of the

standard DMU-1630 menu.

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