User Manual

6
iLM8 – Live User Manual
Environmental Preservation Efforts
This equipment has been designed and built by DaySequerra corporation to give many
years of trouble free service and is backed by our three year warranty and commitment
of providing the best customer support. When the time comes to retire your product from
service, it should be disposed of in accordance with local codes or ordinances. Do not
discard with household or commercial waste.
DaySequerra products are only to be installed in an inside location where
it is protected from inclement weather. Operate DaySequerra products in
temperature range of +5 to +40°C (105°F), with relative humidity ranging
from 5 to 85% non-condensing. Adequate cooling must be provided if
units are to be operated in high temperature locations (greater than
+40°C). Exposure to liquid and condensation must be avoided.
DaySequerra products are manufactured with the environment in mind. The directive on the restriction
of the use of certain hazardous substances in electrical and electronic equipment (2002/95/EC) restricts
the use of six specific hazardous materials in the manufacture of various types of electronic and
electrical equipment. Following this directive prevents these toxic substances from entering our
environment after disposal.
Introduction
DaySequerra’s iLM8 – Live Intelligent Loudness Monitor measures perceived loudness of up to eight
channels of program audio using the industry-standard ITU-R BS.1770-1, BS.1770-2, and BS1770-3
with Eclipse Loudness Measure algorithms. This proprietary algorithm was developed by after
extensive research into human hearing and perceived loudness.
Loudness is a perceptual property of an audio signal when it is reproduced acoustically. It is a complex
non-linear function of amplitude, frequency and bandwidth. Current audio level meters measure the
level of audio signals expressed as the amplitude of the signal - either the RMS (root mean square)
voltage of an electrical signal or the sound pressure of an acoustical signal. Neither of these
measurements, although widely accepted, provides accurate indications of how viewers will perceive
the loudness of the audio programming.
The Eclipse Loudness Measure algorithm uses a perceptual model of human hearing to more
accurately detect spectral and density differences, inter-channel relationships and temporal overlaps in
any audio content, resulting in a more accurate perceived loudness measurement over time.
The iLM8 - Live measures the perceived loudness of eight channels of program audio and displays the
results in an easy-to-read numerical format with a moving average over time, eliminating the variations
with engineers interpreting traditional VU or PPM indicators (neither of which can measure perceived
loudness).
To improve system reliability and up-time, iLM8 - Live uses a robust DSP-based processing platform
rather than the PC-based approach to completely avoid broadcast disruptions caused by operating
system lockups. The iLM8 - Live’s built-in high-performance headphone amplifier allows monitoring of
any two user-selected outputs even in noisy background environments. A set of user-definable alarms
can alert an operator of input loss, signal clipping and high or low signal levels referenced to the
desired loudness level. An Ethernet interface provides long-term logging and field software updates
capability. Whether pre-screening content at an ingest point or keeping tabs on the output of a
broadcast air-chain, iLM8 is your key to reduce viewer complaints and improve audience satisfaction.