Panasonic AV-HLC100E Operating Instructions Manual

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Panasonic AV-HLC100E Operating Instructions Manual Manual pdf 33 page image

33output. Source sliders default to their 0 dB gain setting on first launch. After adding audio sources, adjustthese sliders as required.Hint: Most numeric controls in the interface can be reset to their defaults by pressing Shift while double-clicking the control knob in the interface.6.9.1 Audio HeadroomIn digital audio systems, levels exceeding ‘legal’ values are ‘clipped’ (uniformly assigned the maximumvalue). This results in audible issues that cannot be easily or fully corrected later. For this reason, it’scustomary to configure normal operating level (also referred to as the ‘alignment level’, or sometimes‘nominal level’) well below the clipping limit so that occasional excessively loud sounds (for example, loudlaughter or applause) can be accommodated without risk.This range above between nominal level and the highest possible level is referred to as ‘audio headroom’.What is considered a suitable headroom allowance varies from one locale to another, in different industryapplications, and even in individual studios. AV-HLC100’s audio calibration follows well-establishedconventions, providing 20 dB of headroom above nominal level (+4 dBu at 0 dB on the VU scale).Hint: Confusion can sometimes arise because different calibration scales are common in various audiorealms, and even for different device types and software. For example, analog mixers commonly showlevels on VU scales indexed as just described. In contrast, digital devices and editing software usuallydisplay levels in dBFS (Decibels Full Scale), with 0 dBFS – the absolute maximum signal level that canbe recorded – at the top. AV-HLC100’s VU meters have selectable calibration, allowing you to view atraditional dB VU scale or dBFS as you please (see Section 13.9.1).Whatever scale you choose, use the Gain controls in the audio Input Configuration to avoid over-modulation. The Compressor/Limiter feature (also located in the Input Configuration) is another powerfultool to help you prevent clipping – see Section 13.8.Section 6.10 NetworkingOf course, AV-HLC100 provides extensive support for NDI sources and NDI outputs across a network.Naturally this advanced feature requires your system to be connected to the network.AV-HLC100 supplies two ‘Gigabit’ network connections on its backplane. Generally, simply connecting asuitable cable from an Ethernet port on the unit’s backplate to your local network is all that is required toconnect to a local area network (LAN). In some settings, additional steps may be required. You canaccess the Windows Network and Sharing control panel to accomplish more extensive configurationtasks. If further help connecting is required, please consult your system administrator.Note: To receive NDI|HX sources, such as the output from NDI-enabled Panasonic cameras, theNewTek NDI|HX driver for Windows ® must be installed on AV-HLC100.