Download 4 - Advanced Audio

Overview : AMPLITUDE Controls
Operation
AMPLITUDE Controls
The AMPLITUDE controls allow control of amplitude-based
parameters. Exactly which parameter is controlled by the
AMPLITUDE controls depends on which panel is displayed, and what
parameters are selected.
For example, in the Main panel, the AMPLITUDE controls adjust the
amplitude of the generator. In the Sweep panel, if an amplitude-based
measurement function is selected, the AMPLITUDE controls adjust the
top and bottom amplitude values of the sweep.
The +10 dB and –10 dB keys will cause the selected AMPLITUDE
parameter to increase or decrease by a factor of 10 dB.
If the 1.00 dB/ISO option is selected, the behavior of the INC and DEC
keys depends on the selected units. If the units are decibels, the INC
and DEC keys will adjust the value by 1 dB steps. If the units are
linear, the keys will adjust the value in ISO steps. ISO standard
amplitude steps go in the sequence 1.00, 1.25, 1.60, 2.00, 2.50, 3.15,
4.00, 5.00, 6.30, 8.00, 10.00. These same steps are used with other
powers of 10 to give values of 10.0, 12.5, etc.
The AMPLITUDE knob can be turned clockwise or counterclockwise
for fine adjustment of the AMPLITUDE parameter. The knob controls
amplitude with resolution of 0.0065 dB. One full rotation will change
the amplitude by about 36% or 2.7 dB. This may be different for
other parameters besides amplitude.
Portable One Plus Access User's Manual
4-7
4 Operation
& For more
information on
the Setup panel,
see page 4-8.
The INC and DEC keys will increment or decrement the AMPLITUDE
parameter by a certain step size. The user can program the step size,
choosing either a specific linear step size, a specific decibel step size, or
‘1.00 dB/ISO’. This setting is made on the Setup panel. Pressing the
lower right Soft key in this panel will select between 1.00 dB/ISO, a
specific volt value, and a specific decibel value. When a specific value
is selected, the AMPLITUDE controls can be used to adjust the step
value.