Amber 5500 - Page 15

Amber model
5500
Owner’s Manual Version
07
Another
example:
assume a value
of
0.46
V
was
stored
as
a reference and the
current
measured value is
3.6
V. If the
RELATIVE
key
is
pushed,
a
reading
of
783%
will be
dis-
played
as the ratio of
0.46
to
3.6.
That
is,
the
new measured
value is
783%
of the
stored
reference. This
could be
easily
converted
to
a
dB
figure by selecting
a
log
units
display.
Push and hold the
SHIFT
key
and
push
the
UNITS
key
to
see
+17.88
dB.
Setting
the relative
mode and
storing
the
current
measured value as
the reference can
Programmable
Audio
Measurement
System
Section 2
also be
accomplished
as a
single operation.
The shifted mode
of the
RELATIVE
key
ac-
complishes
this. To
set,
push
and hold the
SHIFT
key
and then the
RELATIVE
key.
The
display
will now
change
to
0.0
dB or
100%
and all
future
readings
will be
relative
to this
current
value.
Note:
A
separate
reference
is
maintained in
memory
for
both
DISTORTION
and LEVEL
measurements. The
DISTORTION
reference
is
stored as a
ratio and the
LEVEL reference
as an
absolute
value.
2-13