DaySequerra iLM8 User manual
iLM8
8 Channel Intelligent Loudness Meter
User Manual
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iLM8 User Manual
Welcome
Thanks for purchasing the DaySequerra iLM8. Differences in audio levels between TV programs, or
between programs and commercials, are a constant annoyance to viewers. iLM8 permits broadcasters
to verify compliance of their desired loudness level across all audio programming and minimize viewer
complaints.
We design and build all of our DaySequerra products to be completely reliable and easy to use, so you
can concentrate on producing great sounding broadcasts, not struggling with complicated equipment or
difficult to use product manuals.
While the iLM8 has been designed to be straightforward to use, we do suggest that you spend a few
minutes familiarizing yourself with the features and operational functions that are contained in this
manual.
DaySequerra has been building broadcast quality products since 1989. The technology
developed for the iLM8, and all of our products, has evolved through a process of user
feedback, extensive listening, field-testing and careful refinement.
In the event that you encounter any technical or operational difficulties with this or any DaySequerra
product, please feel free to contact us at 856-719-9900. Our office hours are from 9 to 5 ET, Monday
Also, please remember to visit our website www.daysequerra.com for warranty registration and the
latest DaySequerra product information.
We have worked hard to ensure that your DaySequerra iLM8 will reliably serve you for years to come.
With a modular design and upgradeable firmware, your new unit is easy to install and use right out of
the box.
We sincerely hope our products help you achieve a new level of excellence in your work!
David V. Day
and the DaySequerra Team
iLM8 User Manual
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Table of Contents
All rights reserved DaySequerra Corp. Copyright 2010.
All logos and trademark used herein are the property of their respective owners.
Specifications subject to change.
iLM8 User Manual Revision B for firmware 4.01.00.
iLM8 Key Features
•
Standalone operation – no external encoder is required
•
Industry-standard ITU-R BS.1770/1 and Leq(A), Leq(B), Leq(C), Leq(M) weighted
measures along with the DTS-Neural Loudness Measure (NLM) algorithm;
simultaneous measurement for 5.1 surround and auxiliary stereo inputs
•
Robust DSP platform – no PC operating system to hang; no lengthy boot-ups
•
Easy-to-read numerical Measured and Target readouts on vacuum fluorescent display;
bar graph LED audio level meters and exclusive Mix Monitor indicators
•
Front panel headphone monitor
•
Ethernet interface for long-term logging and field software updates
•
Optional HD/SDI and Balanced Digital AES I/O
Important Safety Information 4
Service Information 4
Technical Specifications 5
Introduction 6
Measuring Loudness 7
Using iLM8 to Control Loudness 10
Installation 12
Front Panel 13
Rear Panel 14
Meter Display 16
Home Screen 17
Programming Menu 18
Menu Tree 18
Menu Functions and Descriptions 19
Faults 26
Firmware Update 27
iLM8 Remote Dashboard 28
Remote Dashboard Configuration 29
Using Remote Dashboard 31
Log Files 32
Maintaining an Accurate Clock 33
Remote Dashboard Troubleshooting 33
Warranty 35
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iLM8 User Manual
Important Safety Information
•Indoor use only. Not for use in wet or damp environments
•Maximum Relative Humidity: <80%
•Class I Equipment (grounded type)
•Electrical rating: 100-260V~50-60Hz 25W max
•Internal circuit breaker for continuous short circuit protection
•AC Mains supply voltage fluctuations are not to exceed +10% of the nominal voltage
•Operations temperature range -40°C to 70°C
•Maximum altitude: 3000m (9843ft)
•Equipment suitable for continuous operation
•Weight: 3.6kg (8lbs) equipment only; 5.4kg (12.0lbs) shipping
Important Note: Please connect your iLM8 to an uninterruptible power supply (UPS) to provide
other protection against power surges and low-voltage conditions.
If iLM8 is subjected to a strong RFI field, such as those emitted from portable two way radios,
the display may “blank out”. To restore the display without rebooting the unit, turn the rotary
encoder to activate the main menu, and then press HOME. If the keylock is enabled, you will
have to deactivate it by pressing the ENTER key followed by BACK.
Service Information
The DaySequerra iLM8 contains no user serviceable components inside the unit. Please contact
DaySequerra for repair and upgrade information. In the event that your unit needs to be returned to the
factory, contact us for a return authorization number. Please visit www.daysequerra.com and
register your new iLM8 so we can keep you informed of the latest hardware and software
updates.
The lightning flash with arrowhead symbol is intended to alert the user to the presence of un-
insulated “dangerous voltages” within the product’s enclosure that may be of a sufficient level
to cause harm.
The exclamation point within a triangle is intended
to alert the user to the presence of important
operating and maintenance instructions within the
product literature.
Exposed portions of the power supply assembly are
electrically live. To reduce risk of electric shock, the
power cord must be disconnected when the power
supply assembly is removed. For continued
protection against electric shock, a correctly wired
and grounded (earthed) three-pin power outlet must
be used. Do not use a ground-lifting adapter and
never cut the ground pin on the three-prong plug.
The ground terminal of the power plug is connected
directly to the chassis of the unit.
iLM8 User Manual
Technical Specifications
Power Consu
mption:
25W Maximum
Dimensions:
Rack Mount; 1 RU (1.75” x 19” x 10.75”)
Sample Rate:
32kHz-96kHz, 24-bit
Loudness Algorithms:
ITU-R BS.1770/1 (LKFS), DTS Neural Loudness
Measure (NLM), Leq(A), Leq(B), Leq(C), Leq(M)
Headphone Monitor:
3.5mm TRS connector, >150mW max into 32Ωload
GPIO:
DB-9 Female, 0-5V TTL opto-isolated
Regulatory:
North America: Designed to comply with FCC Class
A part 15 requirements
Europe: Designed to comply with LV Directive
73/23/EEC and EMC Directive 89/336/EEC; CE Mark
(EN 55022 Class A, EN55024); Designed for RoHS
and WEEE compliance
FCC Part 1 Regulatory Statement
This equipment has been tested and found to comply with the limits for Class A digital device pursuant
to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against
harmful interference when the equipment is operated in a commercial environment. This equipment
generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance
with the user manual, may cause interference to radio communications. Operation of this equipment in
a residential area is likely to cause interference in which case the user will be required to correct the
interference at their own expense. The user is cautioned that changes and modifications made to the
equipment without approval of the manufacturer could void the user's authority to operate this
equipment. The user should use only shielded and/or grounded cables to combat sources of
interference.
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 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.
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iLM8 User Manual
Introduction
Broadcasters need a solution to effectively measure, and ultimately control the abrupt changes in
loudness that sends viewers diving for their remote controls during commercial breaks and action
scenes. DaySequerra’s iLM8 Intelligent Loudness Meter measures perceived loudness of up to eight
channels of program audio using the industry-standard ITU-R BS.1770/1 loudness measure, along with
the DTS-Neural Loudness Measure (NLM) algorithm and the weighted intensity measures Leq(A),
Leq(B), Leq(C) and Leq(M).
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 DTS NLM 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. This proprietary algorithm
was developed by after extensive research into human hearing and perceived loudness.
The iLM8 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 uses a robust DSP-based processing platform rather
than a PC-based approach to completely avoid broadcast disruptions caused by operating system
lockups. The iLM8’s built-in high-performance headphone amplifier allows monitoring of any two user-
selected output pairs even in noisy background environments. An Ethernet interface provides long-term
logging and field software updates capability. The exclusive DaySequerra Mix Monitor provides instant
positive feedback if the audio is within target range. An optional factory-installed HD/SDI module will
allow for measurement of 8 channels of program audio from group 1 or group 2 with user specified
mappings within the group.
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 overall audience satisfaction.
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Measuring Loudness
Human perception of the sensation of an audio signal is properly called “loudness”. As early as 1933,
research by Fletcher and Munson showed that human hearing sensitivity is largely based upon the
frequency of the sound, as well as the sound pressure level (SPL). As humans do not hear sound using
standard measures of intensity, measuring loudness based upon SPL or the root mean square (RMS)
voltage of the electrical signal will not agree with human perception. The Fletcher/Munson Equal
Loudness Curves show the limits human sensitivity of certain frequencies, especially low frequencies
(bass) at lower sound levels (Fletcher & Munson, 1933).
Fletcher/Munson Equal Loudness Curves
In order to create a loudness measure that more accurately represents the human perception of
loudness, frequency weighting (or equalization curves) are placed ahead of power measurements. This
introduces the measures Leq(A), Leq(B), Leq(C) and Leq(M) – with ‘Leq’ attempting to relate the
‘L’oudness of an ‘eq’uivalent amount of energy in a standard signal, typically a 1 kHz sine wave. The
most current weighting standard, ITU-R BS.1770 produces results known as LKFS that are referenced
to a dB FS scale. While certain Leq(x) measures match more closely to human loudness perception
than traditional SPL or RMS measurements, there are still many broadcast content types that cannot be
measured correctly with a Leq(x) or LKFS weighting method.
For example, a narrowband signal may be perceived to sound softer than an equally intense wideband
sound, depending on the relationship between rendering level, absolute threshold and signal content.
Additionally, content with large amounts of low-frequency energy is often inaccurately measured by
BS.1770 due to heavy low-frequency roll off (see weighting curves). This measurement will often vary
from a subjective measure, especially in the short term; however this variance is acceptable in a long
term measurement, as the values are smoothed over many seconds, minutes or hours. Small
deviations between the instantaneous perception of loudness is often acceptable when using a meter
solution to measure the loudness, as the meters usually offer an audio visualization method that human
operators can use. Combined with their ears, the operator can make any decisions about any corrective
action required.
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iLM8 User Manual
Weighting Curves
To achieve a more accurate loudness measurement, the method should include critical bands in the
measurement. Critical bands describe auditory filters within the human cochlea. (J. Allen, 2010). To
illustrate this, a subject is presented with a single tone of a certain energy level, and more tones are
added with equal energy in the critical bands – the total signal energy is kept constant regardless of the
number of tones. If changing from one to two tones, the energy of each of the two tones is exactly half
of that of the single tone. While the amount of audio energy never changes, the perceived loudness
increases as the energy spectrum spreads out across more tones (Johnston, 2006).
J. Allen Cochlea Filters (2010)
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Bronwyn Jones and Emil Torick created a revised CBS loudness meter in the early 1980s that
consisted of eight filters, each covering three critical bands. This approach did prove to deliver better
subjective modeling than traditional SPL or RMS measurements (Jones & Torick, 1982).
In 2004, Nielsen and Skovenborg published an AES paper that expanded upon the ideas of critical
band loudness measures. This paper introduced a method called HEIMDAL, which separated spectra
into nine bands via an octave filter band. While the HEIMDAL multi-band model did not achieve the
complexity of cochlear modeling as shown by J. Allen, the method had the lowest error compared to
any preceding loudness models (Nielsen & Skovenborg, 2004).
Absolute Error (dB) of various loudness measures
Despite the clear benefits of critical band analysis in loudness measurement, there are very few
methods currently available to measure loudness this way in real-time for broadcast applications -- the
extra processing required to accomplish it have prevented widespread adoption. DTS Neural Loudness
Measure is the first real-time perceptual loudness measurement product available that embraces this
advanced approach to loudness measurement.
Critical band comparison between loudness measures
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iLM8 User Manual
Each Leq(x) revision results in a different level of correlation between the objective measure and
the human listener’s assessment of loudness.
The lowest mean error score was achieved by the Neural Loudness Measure
Works Cited:
1. Fletcher, H. & Munson, W. A. (1933). Loudness, its Definition, Measurement, and Calculation.
2. Allen, J (2010 May 20). Nonlinear Cochlear Signal Processing.
3. Johnston, J. (2006). Loudness Tutorial.
4. Jones, B. L. & Torick, E. L. (1982). A New Loudness Indicator for Use in Broadcasting.
5. Nielsen, S. H. & Skovenborg, E. (2004). Evaluation of Different Loudness Models with Music and Speech Material.
Using iLM8 to Control Loudness
The most valuable tools in determining loudness in your program material include:
•iLM8 Intelligent Loudness Meter – Operators should position iLM8 at various places within the
signal flow to objectively verify that audio loudness levels are within tolerance. Limited operator
training is required to learn the basics of perceptual loudness measurement and management.
•A Listening Ear – No amount of metering can replace the value of active listening. Broadcasters
should use trained technicians who work in listening environments that accurately represent the
consumer’s expected environment as a final line of defense against inappropriate loudness.
When measuring live content in real-time, operators can use short-term smoothed loudness
measurements to confirm that the mix or overall program audio is adhering to broadcaster-established
guidelines or a governing body’s mandated target. However, when content is stored for playback at a
later time, an opportunity is created for non-real-time loudness measurement.
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A long term loudness measurement of an entire clip is referred to as an infinite average. To achieve the
desired loudness level, this value can be used to update the Dial Norm metadata, thus affecting the
audio’s perceived loudness when processed at the point of consumption by way of the set top box or,
more recently, digital television receiver.
Granted that not all viewers will have equipment capable of processing metadata or Dial Norm
information, it is possible to control the perceived loudness by the application a fixed-offset to the audio
content after the infinite average of an entire piece of content has been measured. While this may
sound like the ideal loudness solution, it alone will never completely address loudness complaints.
For example, imagine that a movie starts with a dramatic scene
where the first ten minutes consist of speech and sound effects
measured at -31 LKFS. The second half of the scene includes a
car chase measuring at -17 LKFS. The Dial Norm correctly
describes the entire scene as -24 LKFS, however the viewer
perceives the audio level as very low for the first half of the clip
followed by audio that is significantly louder during the second
half. While this extreme dynamic range may be acceptable in a
movie theatre, it is typically not within the typical viewer’s home
environment. The infinite average and fixed-offset approach has
no way of addressing such intra-content issues.
Another challenge that fixed-offset correction cannot solve is how loudness is perceived in the context
of playback. In this scenario, a TV program ends quietly followed by a high-energy commercial. Even if
both pieces of content are properly prepared and played back at correct infinite average levels, an
abruptly louder start to the commercial will create a jarring effect when played back immediately after
the quiet ending.
Last century’s loudness solution was a fix-all audio processor that was situated at the end of the
broadcast chain, controlling loudness by ‘squashing’ the audio and removing essential audio dynamics.
With visual feedback presented from the iLM8, a new solution has emerged that enables engineers to
measure perceived loudness correctly and take appropriate corrective action on the fly, imitating
methods used by audio mix engineers who actively ride their faders. When coupled with a proficient
listening ear, the solution is easily integrated with existing broadcasting workflows, delivering the
flexibility engineers need to adjust loudness levels in real-time, without removing any signal dynamics.
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iLM8 User Manual
Installation
Immediately upon receiving your iLM8, please make a careful inspection for any shipping damage. If
damage is found or suspected, please notify the carrier at once and then contact your dealer. iLM8 is
shipped in one carton, which contains: the iLM8 unit and an AC power cable.
We strongly encourage you to save the shipping carton and shipping materials supplied with your iLM8.
They are specially designed to properly protect your iLM8, and in the event that you need to return it for
service, only these OEM shipping materials can ensure its safe return to our factory.
We provide a limited 3-year warranty on all of our products; however, if you don’t register your unit, it is
impossible for us to contact you to notify you when important software upgrades become available.
Please take a few minutes to complete the warranty registration form on our website,
www.daysequerra.com.
Rack Mount Installation
The iLM8 chassis has four rack mounting holes and has been designed to fit in a standard 1RU space.
Plastic ‘finishing’ washers are recommended to protect the painted surface around the mounting holes.
Locate the air vents on each side of the unit, and be sure to keep them clear so the unit may have
adequate ventilation.
Power Connection
The AC power cable supplied with iLM8 must be connected from the IEC320 power entry module to an
AC mains outlet with a functional earth ground connection. For protection against electric shock and
electro-magnetic interference, do not plug the power cable into a ground lifting adapter or remove the
cable’s grounding pin. If in doubt, please consult a qualified electrician.
Please connect iLM8 to an uninterruptible power supply (UPS) to protect against power surges
and low-voltage conditions. iLM8 may be combined with other devices on the output of the UPS as
long as the total load is within the UPS’ capacity. Consult your UPS manual for details.
iLM8 will automatically power up when AC power is applied. If AC line power is lost or
momentarily interrupted, iLM8 will revert to its previous state.
iLM8 User Manual
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Front Panel
Bargraph Meters
INPUT LEVELS - Eight 10-segment multi-colored LED meters display the true-peak audio level for
each channel of the inbound audio stream.
Status
Indicators / Mix Monitor
OVER TARGET - Red LED indicator illuminates when the short term
combined average for the active input displayed on the home screen is
over the user-specified target.
ON TARGET - Green LED indicator illuminates when the short term
combined average for the active input displayed on the home screen is
within the user-specified target.
UNDER TARGET - Blue LED indicator illuminates when the short term
combined average for the active input displayed on the home screen is
under the user-specified target.
LOGGING - Green LED indicator illuminates when iLM8 has an established session with a PC running
DaySequerra iLM8 Remote Dashboard software.
Display and Controls
VACUUM FLUORESCENT DISPLAY - A multi-function display will indicate current operating status of
the unit and system menus.
ROTARY ENCODER - A stepping optical rotary encoder is used to select values or navigate the menu
system.
ENTER KEY - Used to enter a menu or confirm a selection. To enter the main system menu, simply
press ENTER while iLM8 is on the HOME screen.
HOME KEY - A press of this button will return iLM8 to the home screen or enter home screen selection
mode.
BACK KEY – This key will return to a previous menu, or if you are entering a value, exit the field and
return the value to the last programmed state. While at the home screen, pressing BACK will reset the
infinite average value for the active input displayed.
HEADPHONE JACK – Accepts any headphone or monitor that has a 3.5mm stereo mini-jack
connection. Volume control and channel pair selection are adjusted on the home screen by selecting
the headphone icon.
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iLM8 User Manual
Rear Panel
AES INPUTS - Four 75ΩBNC connectors will accept the AES3 digital audio stream. For iLM8 to work
properly, the following channel inputs must be maintained:
•1/2 - Left and Right Channel (Front)
•3/4 - Center and LFE
•5/6 – Left and Right Surround
•AUX – Left and right Auxiliary
AES OUTPUTS – Four passive 75ΩBNC connectors output the AES3 digital audio stream.
Balanced Digital AES I/O (option 01) – One transformer
Coupled 110Ωbalanced I/O connector is provided as per
AES3-1992 standard for using AES format digital audio
over 110Ωtwisted pair cable. A standard TASCAM format
DB-25 female connector is included on iLM8 and can
interface directly with your existing equipment.
HD/SDI I/O (option 02) - Two 75ΩBNC connectors handle HD/SDI I/O. One input port as well as one
passive output are present when this option is installed. Supported formats include SMPTE 259M,
SMPTE 292M, and SMPTE 424M as well as ITU-R BT.656 and ITU-R BT.601. See the HD/SDI section
of this manual for more details.
The AES-3id-1995/SMPTE 276M standard dictates a 75Ωunbalanced connection and requires proper
termination. The termination should occur at the destination of the signal (that is, on the inputs to iLM8).
If the loop-through BNC connectors are not feeding additional equipment, terminate each of these with
a standard 75Ωterminator. Like other inputs, HD/SDI signal should also be terminated.
iLM8 User Manual
1
GPIO – A Female DB-9 connection that allows iLM8 to be monitored or controlled externally. Opto-
isolated inputs will be triggered by a voltage of 5VDC.
DB-9 Female Port
on iLM8 Rear Panel
Output 1: Relay 1 is Normally Open. Upon an AES lock loss failure, this relay will close. When
the failure is remedied, the relay will open.
Output 2: Relay 2 is Normally Open. Upon a hardware failure (i.e. Internal Communications
Failure), the relay will close. When the failure is remedied, the relay will open.
Input 1: Momentary voltage detected on this port will cause iLM8 to reset the infinite average for
the surround inputs. As long as the voltage is present, iLM8 will hold the infinite average value
in a reset state. This allows for pause and reset of the infinite average on one GPI line.
Input 2: Momentary voltage detected on this port will cause iLM8 to reset the infinite average for
the auxiliary input. As long as the voltage is present, iLM8 will hold the infinite average value in
a reset state. This allows for pause and reset of the infinite average on one GPI line.
Input 3: Momentary voltage detected on this port will cause iLM8 to toggle pause of the infinite
average for the surround input.
Input 4: Momentary voltage detected on this port will cause iLM8 to toggle pause of the infinite
average for the auxiliary input.
NETWORK - Used for logging or to update iLM8’s firmware. To connect directly to a PC without use of
a network switch or hub, a crossover cable is required. Firmware updating is accomplished via UDP
Port 44600. Please refer to the iLM8 Remote Dashboard section of this manual for more details on
logging, or the Firmware Update section of this manual for the update procedure.
PSU 1 - IEC320 port to connect to AC Mains. The internal power supply is auto switching and will work
on 120VAC-60Hz or 240VAC-50Hz electrical power systems with a maximum total current draw of 25W
(>.25A 120VAC or >.15A 240VAC).
Please connect iLM8 to a properly grounded uninterruptible power supply (UPS) to protect
against power surges and low-voltage conditions. iLM8 may be combined with other devices on the
output of the UPS as long as the total load is within the UPS’ capacity. Consult your UPS manual for
details.
Pin Signal
1 Output Relay 1 N.O.
2 Relay 1 Common
3 Optical Input 1
4 Optical Input 2
5 Optical Input
Common
6 Output Relay 2 N.O.
7 Relay 2 Common
8 Optical Input 3
9 Optical Input 4
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iLM8 User Manual
HD/SDI
iLM8 can use an optional factory-installed HD/SDI I/O module to measure audio directly embedded into
an SDI stream without any additional required equipment.
The HD/SDI module contains 3 Gb/s SDI technology and will auto-detect the signal, whether SD, HD or
HD 3Gb/s format. Audio will be automatically extracted from popular video standards such as: NTSC
525/29.97, PAL 625/25, 1080i/59.94, 1080i/50, 1080PsF/23.98, 1080PsF24, 720p/59.94 and 720p/50.
The sample rate of extracted audio is converted to 48 kHz, 24 bit resolution regardless of the source
material and is available as AES audio at iLM8’s output jacks.
Meter Display
Metering display iLM8
INPUT LEVELS – LED display shows current true-peak amplitude of input signal from
-60dB to 0dB across all active channels. Unused channels will not light the display. The Meters are
updated every 20ms.
L - Left (AES Input 1/2) Ls - Left Surround (AES Input 5/6)
R - Right (AES Input 1/2) Rs - Right Surround (AES Input 5/6)
C - Center (AES Input 3/4) Aux-L - Auxiliary Left (AES AUX Input)
LFE - Low Frequency (AES Input 3/4) Aux-R - Auxiliary Right (AES AUX Input)
Note: “7.1 Back” channel meters are reserved for a future software version. Presently iLM8 does not
measure 7.1 surround.
iLM8 User Manual
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Home Screen
Home Screen on iLM8
iLM8 has been designed with ease of use in mind. Most of the common settings are available for
modification right on the home screen. While the unit is at this screen, press the HOME key to invoke
the home screen selection mode; a selection box will appear. Turn the rotary encoder to move the box
to the desired field to be changed and press the ENTER key to modify the value. Rotating the encoder
again will cycle through the available options. Press ENTER again to confirm selection, or BACK to
revert the setting to the last saved value. Pressing the HOME or BACK keys exits the home screen
selection mode.
1. The current short term combined average value is displayed in a large font, rounded to the
next whole number.
2. Indicates which input measurements are being displayed (surround our AUX) on the entire
screen. Pressing ENTER will change between the 5.1 Surround and AUX Stereo input
display. The loudness measure and short averaging time are displayed here.
3. Shows the user-set target reference value for the selected input display. Pressing ENTER
will allow for target level adjustment.
4. The calculated Infinite Average or True Peak (standard peak for NLM) for the selected input.
5. Indicates if the Infinite Average or the True/Standard Peak is being displayed in field four.
Press ENTER to toggle.
6. Headphone adjustment icon. Pressing ENTER while will display the HEADPHONE
VOLUME/MONITOR CONFIGURATION menu.
7. Pause / Resume Infinite Average icon. Selecting this icon will toggle pause or resume for
the Infinite Average for only the selected display input.
8. Reset Infinite Average icon. Selecting this icon will reset the Infinite Average calculation for
the selected display input only.
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iLM8 User Manual
Programming Menu
If AC line power is lost or momentarily interrupted, iLM8 will revert to its previous state.
To enter the programming menu, turn the selection knob in any direction while at the HOME screen.
The ENTER key will enter the selected sub menu or enter the value selection mode for the selected
option. A press of the BACK key will navigate to the previous menu level or will revert the current value
to its last stored state.
Menu Tree
Visual Map of iLM8 Menu System
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Menu Functions and Descriptions
Main Menu Screen Display
The main menu display shown on iLM8 when first entering the menu is demonstrated above. To enter
the main menu, press the ENTER key from the home screen while the unit is unlocked. From the main
menu screen you may navigate to the desired sub-menu by pressing ENTER.
System Menu
System Menu Screen Display
Navigating to SYSTEM MENU from the main menu will allow adjustment of I/O audio handling, network
settings, diagnostics, alarm settings or information on the unit.
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iLM8 User Manual
I/O Menu
I/O Menu Screen Display
The I/O Menu will allow you to tailor iLM8 to suit your specific application.
Audio Input: Navigates to the audio input configuration sub-menu.
Clock Source: Defines where iLM8 gets the timing signal to sync its internal clock.
a. Internal: iLM8’s internal clock. Define using Sync Source.
b. 1/2: iLM8 will get timing from the 1/2 BNC Input. (Default)
c. 3/4: iLM8 will get timing from the 3/4 BNC Input.
d. 5/6: iLM8 will get timing from the 5/6 BNC Input.
e. AUX: iLM8 will get timing from the AUX BNC Input.
Sample Rate: If Clock Source is set to internal, defines what sample rate frequency iLM8 will use.
(32.0, 44.1, 48.0, 88.2 or 96.0 kHz)
Audio Input Menu
Audio Input Menu Screen Display
NOTE: Unless your iLM8 has the factory-installed HD/SDI I/O or Balanced Digital AES I/O modules
installed, your screen will differ from that above.
Audio Source: Determines which set of physical inputs iLM8 will use to receive audio. Only the
installed options will be available; only one input type may be used at a time:
•AES Inputs: Audio input is from the BNC AES input jacks. (Default)
•HD/SDI Inputs 1-8: Audio input is from the HD/SDI input jack, embedded audio channels 1-8.
Other DaySequerra Monitor manuals
