The +10 dB and –10 dB keys will cause the selected AMPLITUDE
parameter to increase or decrease by a factor of 10 dB.
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.
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.
When controlling jitter amplitude, the INC and DEC keys will step
through a preprogrammed set of standard values regardless of the
setting on the Setup panel.
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.
INPUT Keys
The INPUT keys select between digital and analog analyzer modes,
which channel (A or B) will be measured, and whether the input from
that channel comes from the external connectors or from an internal
path directly from the generator.
OUTPUT Keys
The OUTPUT keys select among the generator control modes and turn
each generator channel on and off.
& For more
information on the
Setup panel, see page
3-9.
& For more
information on the
Input keys, see page
3-24.
3 Operation
Operational Overview Front Panel Controls and Connectors
ATS-1 Dual Domain User's Manual 3-3
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