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The Videotek CMN-LA Loudness Analyzer from Imagine Communications is an audio monitoring device that measures loudness and true peak measurements according to the ITU-R BS.1770-3 standard with five times oversampling. Built-in modes offer quick setup to ARIB TR-B32, ATSC A/85 or EBU R 128 recommendations. Up to five days of loudness data are stored internally and easily retrieved through the USB port or internal web server. Metering of up to 16 channels simultaneously makes for rapid alignment checks.
The CMN-LA has an integrated TC Electronic loudness radar meter which shows loudness on short-terms meters, graphs covering periods from one minute to 24 hours, and numeric display of the long-term center of gravity (average loudness) and consistency (loudness range). The flexible display of the CMN-LA presents data in a format most useful for the job at hand. Use the integrated TC Electronic loudness radar meter during production, the audio status display during program ingest, and the combination of loudness and true peak meters, numeric display and trend chart for master control monitoring. The chart data can be exported for compliance reporting. Adjustable audio output delay compensates for video monitor processing in critical evaluation suites.
The basic CMN-LA unit operates with 3G/HD/SD-SDI embedded audio sources, with a hardware option for eight AES inputs, four AES outputs and eight analog outputs. The analog outputs are meant to drive high impedance loads. The CMN-LA also includes internal speakers and a front-panel headphone jack for source confirmation. A mixdown mode can be applied to the headphone output when using discreet sources. The mixdown parameters are taken from VANC medatada if present, otherwise internal menu settings are used.
The CMN-LA loudness analyzer has a short mounting depth which makes it ideal for use in a QC monitoring rack or on the meter bridge of an audio console.
Loudness measurement to ITU-R BS.1770-3
True peak measurement to ITU-R BS.1770-3 with five times oversampling
Integrated TC Electronic loudness radar display
Trend chart of levels (15 seconds to 24 hours)
Export values to a PC
Audio status display of clips, mutes, average, high and low levels