Media Technology Systems ION8.8 User Manual
Page 8
Page 8 of 31
Aug‐09
Peak:
The LED when illuminated indicates a high level signal is present at the device’s
input. Caution should be exercised since signals at this level are close to, or are clipping
the
amplifier.
Occasional
peaks
are
acceptable
and
let
the
operator
know
the
system
noise
and
headroom
are
optimal.
Constant
peak
indication
should
prompt
a
review
of
the
system
and
its
use
demands.
All
MTSI
products
are
designed
to
have
graceful
overload
characteristics
which
progressively,
rather
than
catastrophically
clip,
thus
significantly
improving
the
real‐world
quality
and
usability
of
the
overall
system.
Phoenix/Euro Type Connector
: Phoenix‐type 3 circuit connectors are used for audio
signal input to the amplifier channels. Input impedance is 20k Ω balanced, 10kΩ
unbalanced.
Power:
The Power LED when lit, indicates power is applied to the unit.
RS485:
An IEEE standard protocol for signal distribution.
http://en.wikipedia.org/wiki/RS‐485
Signal Present:
The LED illuminates with the presence of a low level signal at the
amplifier’s input. This is a useful feature for visually confirming signal flow to this point
in a sound system. As discussed under “
Peak
” the quality of a system’s ability to
“communicate”
the
program
material
being
transmitted
is
primarily
established
at
the
input
to
that
system.
The
signal
to
noise
and
headroom
(isolation
from
potential
clip)
of
a
system
is
established
by
the
optimum
setting
of
the
input
gain
controls.
Having
good
information
when
setting
the
input
gain
is
therefore
critical.
Being
able
to
observe
the
Signal Present
and
Peak
levels gives the operator this critical ability.
SMPS
: Switch Mode Power Supply, is a type of power supply topology, which takes the
incoming
potential
energy
from
the
A/C
power
line
and
"chops"
it
into
very
short
pulses.
SMPS
supplies
give
very
stable
and
highly
regulated
output
regardless,
generally,
of
variations
in
the
A/C
input.
Termination1
: Commonly use term for connecting input and output cables.
Termination2
: In the networked and control & monitoring amplifiers, the RS485
connector is provided with a “termination” selector switch to apply a 150Ω resistive
load
to
the
I/O.
This
is
often
used
to
“load”
the
TX/RX
driver.
Check
the
requirements
of
the
interfacing
device
and
select
the
appropriate
setting.