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.
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