Display Mode - Loudness Sum Instrument

| General Description
| Instrument Description
| Control Bar - left (upper) section: Loudness Sum instrument functions
| Control Bar - right (lower) section

General Description

In display mode, the TouchMonitor shows the instruments and their layout defined in the currently loaded preset.

Touching the screen area of an instrument will put this instrument into focus. This is recognized by a colored frame instead of a grey one. The frame color conforms to the identifier set for the group the focused instrument belongs to.

The Control Bar positioned at the lower screen edge contains several keys. It is displayed permanently if the "Control Bar" option in the "General" section of the "System" menu is set to "permanent". Otherwise, it will be displayed temporarily after touching the screen.

The Control Bar has two sections. The left (upper) section shows the specific keys defined for the focused instrument. This makes it very fast to access a specific function of one of the instruments on screen – just touch the instrument and select the desired function.

Please note:
The specific keys that are displayed in the left (upper) Control Bar section can be defined individually for each instrument. To do this, touch the "Edit Instrument" key and select the "Configure Keys" option in the menu. The default value for each key can be set in the menu as well.

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Instrument Description

The Loudness Sum instrument is only available after one of the loudness modes or Custom was selected for the audio group the instrument is in. According to the selected standard or to the customer specific settings, it shows the combined total loudness consisting of the summed single channels of a signal. This instrument shows up to three bargraphs representing measurements with individual integration time constants. For stereo sources, the L and R channels are summed. For 5.1 sources, the five main channels (5.0) are used for the measurement.
The bargraphs available in the Loudness Sum instrument show the following:

• | M (Momentary): |  | Summed momentary loudness measurements of the individual channels using an integration time of 400 ms.
• | S (Shortterm): |  | Summed loudness measurement using an integration time of 3 s and a sliding window.
• | I (Integrated): |  | Overall program loudness between start and end points that are entered manually. Use the Start, Stop and Reset buttons to execute this measurement.

The three bargraphs representing these loudness measurements can be activated or disabled individually.
Two different scale types are available for loudness measurements:

• | Absolute scale in LKFS or LUFS (depending on the loudness standard selected).
• | Relative scale in LU.

On the relative scale, 0 LU corresponds to their target level defined in the selected loudness standard. In EBU R128, the target level is –23 LUFS. In ATSC A/85, the target level is –24 LKFS. –23 LUFS is identical to –23 LKFS. In order to conform to the individual loudness standard used, the measured program should read the „Integrated“ target level of this standard. Using EBU R128, it should read 0 LU on a relative scale or –23 LUFS on an absolute scale.
The parameters used for the loudness measurement as well as the channel weighting levels are displayed resp. set using the "Loudness" key in the "Audio Group" menu.

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Control Bar - left (upper) section: Loudness Sum instrument functions

With the Loudness Sum instrument in focus, the left (upper) section of the Control Bar may contain any or all of the keys described below.

Please note:
Using the "Configure Keys" option in the Loudness Sum Menu, any key available for the Loudness Sum instrument may be removed from the Control Bar. Only keys set to "On" (default) in the Control Bar section of the "Loudness Sum Key Settings" menu are available in normal display mode with the Loudness Sum instrument in focus.

Please note:
If more than six keys have been activated, they will be placed on two layers. To toggle between the layers, please use key "More" being displayed on each layer.

• Start
This key is used to start the loudness measurement.

• Stop
This key is used to stop the loudness measurement.

• Reset Loudness
This key is used to reset the loudness summing bargraphs.

• Start + R (pulse)
This key is used to start the loudness measurement with a preciding reset. Use the "Stop" or "Pause" key to stop or halt the measurement.

• Start + R (envel)
This key is used to start the loudness measurement for as long as the key is pressed with a preciding reset. To stop the measurement just release the key.

Please note:
This functionality is only available through the GPI port. The on-screen key cannot emulate a latched condition.

• Pause
This key is used to halt the loudness measurement.

• Reset Peakhold
This key is used to reset the peakhold display of the loudness summing bargraphs.

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Control Bar - right (lower) section

The right (lower) section of the Control Bar always contains the following four keys:

• Edit Instrument
This key is used to directly access the menu parameters of the focused instrument. Any edits in the menu are saved to the current preset using the "Save" key.

• Load Preset
This key is used to load one of the presets stored in the unit’s internal memory or on an USB storage medium connected to one of the USB ports.

• Menu
This key is used to enter the Main Menu. This is the starting point for global system configuration, licence handling and preset management.

• Help
This key is used to enter the onscreen help for normal display mode (this text). Depending on the focused instrument, the help page will also describe the individual keys of this instrument.

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