The APM-200
Audio
Power Meter is designed
to
give you BOTH peak and
average indications
of
the
real
output
power
of
yo.ur
stereo system - under actual
operating conditions. The little
row
of
red
lights (LEDS) on the APM-200 will track
short bursts
of
music energy
that
occur
too
quickly
for
a conventional meter
to
follow. The RMS (or averaging) meters keep track
of
the rest
of
the music. This
dual system assures you
of
the highest possible fidelity,
with
the lowest possible
distortion, and
at
optimum (or desired) sound power levels.
The Graph below will help you understand the readings that PEAK and RMS
Meters provide,
as
compared with the signal.
....I
OdB
W
>
w
-10dB
....I
....I
-20dB
<t
Z
(!J
-30dB
(JJ
!
I
1
I(:)
V'
I I I I ,
I
PEAK Meter
!
~
.
I~
~
Reading
-,--
~"~
itt!~t,i
.
.r'
1'\
i ! I
1--
JRMS Meter
I : -
--t...
r
..
i'r.
~.
,1
\II
I ! \ I \
1\
-
-r
!\l \ / \
Reading
I
\/
Y
\1
I'"
V
V'
l4--
I I l
+-
,
Signal
Waveform
I I I I
---=>~
TIME
RADIO
SHACK
LIMITED WARRANTY
: This
equipment
is warranteed against
defects
for
90
days from
!
date
of
purchase.
Within
this
period,
we
will repair it
without
charge
for
parts
and
labor. Simply
bring
your
sales slip as
proof
of
purchase
date
to any Radio Shack store. Warranty does
not
cover
transportation
costs.
Nor
does
it
cover
equipment
subjected
to
misuse or
accidental
damage.
This Warranty gives you
specific
legal
rights
and you may also have
other
rights
which
vary
from
state
to
state.
We
Service
What
We
Sell
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