Attenuation Select
One
of the three channel amplitude control digital/analog
converter settings may be selected for each channel. These settings
f
are:
1.
RAMP the amplitude
DAC
output
2. Maximum Attenuation
3. Minimum Attenuation
If RAMP the amplitude
DAC
output is chosen, the output signal
of the amplitude
DAC may be observed with
an
oscilloscope at the
Channel board locations shown
in
Table 3. The output will appear
as
shown
in
figure 2. If
maximum
attenuation is selected the output
of the
amplitude DAC should be +10 VDC. If
minimum
attenuation
is selected, the output of the amplitude DAC for that channel should
be
0
VDC.
Note:
If neither
RAMP
nor
MAXIMUM
attenuation is selected,
the default
·is
MINIMUM
attenuation.
The
diagnostic will ask:
RAMP AMP DAC?
If
you
press the
NO
switch then it asks
MAXIMUM ATTENUATION? If you press the NO switch then
MINIMUM
attenuation is used.
Group
Select
Each of the 12 channels may be assigned to one of the two
mixer outputs. These mixer outputs are designated Group A and
Group
B.
The final audio outputs are designated LEFT and RIGHT.
The
channels assigned to Group A can
be
panned from left to right
by
moving the Group A slider
on
the front panel of the K250. Similarly,
the channels assigned
to
Group B can be panned from left
to
right
by
moving the Group B slider
on
the front panel of the K250.
The
diagnostic will ask:
ASSIGN
TO
GROUP A?
Kurzwell
250
Service Manual, Chapter 4
4 -
25
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