Amber 5500 - Page 29

Amber
model
5500
Owner’s
Manual Version
07
Programmable
Audio
Measurement
System
Section 2
2.2.14
IMD
AMPLITUDE RATIO
(requires
option
002
IMD)
In the
IMD
modes,
two
oscillators
produce
a
twin tone
signal.
The relative
amplitude
of
the
two
signals
can
be user defined
in the
SMPTE
mode. In the
CCIF
mode,
the
two
signals
are
fixed at a 1:1 or
equal
amplitude
but
in the
SMPTE/DIN
mode,
four relative
amplitudes
are
possible:
1:1,
1:2,
1:4
and
1:10. When the
SMPTE/DIN
IMD mode
is
selected,
the
1:4 ratio is
automatically
set
(the
SMPTE/DIN
standard).
A
different ratio
can
be
selected
by
using
a
SPECIAL
FUNCTION
(SPCL).
Special
Function
35
is
reserved
for
lMD ratio.
35.1 SPCL sets
a
1:1
ratio,
35.2
sets a 1:2
ratio,
35.4 sets a
1:4 ratio
and
35.10
sets
a
1:10
ratio
(special
functions do
not
require
a
prefix
key).
To
set a
ratio,
key
in the
correct numeric
code
(eg.
35.4)
and
ter-
minate
by
pushing
the
SPCL
key.
Special
Function
35.0
can
be used
to
view the
cur-
rently
set ratio.
2-27