47
Model Three - Operation Manual
For example, to change the display graph from a
10 dB
scale to a
5
dB
scale, press the
F
1
F
1
key three times to cycle through the steps.
You may also change the reference level of the graph. Press the
F
2
(REF)
key and then press the
__
and
keys
to increase or
decrease the reference by one digit at a time.
Press the
F
3
(UP)
key to return to the original Level screen so that
the functions of the
F
1
F
1
and
F
2
keys become
FREQ
and
MAX
.
The amplitude of the graph changes as you
change the scale and reference so that it
continues to indicate the correct level. You
must press the
F
3
(UP) key to return to the
original Level screen for the
__
and
keys
to change channels (instead of reference) again.
