control. If no buttons are pressed for two hours, the ‘screen saver’ will
be invoked, and the display will darken to preserve the useful lifetime
of the display. Pressing any key will turn it on again (but will not
execute that key’s function).
dBr Zero Key
The dBr Zero key is used to set the internal dBr reference value to the
value of the current measurement. When saving and recalling setups,
it provides some additional soft key functions.
GPIB Status Indicators
When the instrument is controlled via the IEEE-488 bus (GPIB), these
three front-panel LEDs indicate the GIB status as follows:
.
ADDR– Indicates that the instrument is talk addressed or listen
addressed by the controller.
.
REM– Indicates that the instrument has been addressed and is
in remote state or has received the Local Lockout command,
locking out any control from the front panel.
.
SRQ– Indicates that the instrument has asserted a service
request (an SRQ line interrupt) to the controller.
CONTRAST Control
The CONTRAST control adjusts the brightness and viewing angle of
the liquid crystal display. If you are having trouble reading the display,
adjust this knob until the letters and numbers are easily distinguishable
from the background.
To invert the display so that the background is dark and the characters
are light, refer to the Setup Panel section, page 3-9.
MONITOR Operation
The ATS-1 Dual Domain has a built-in monitor for audible monitoring
of signals, either with stereo headphones or through a built-in speaker
that receives the combined A and B channels.
To use stereo headphones, plug them into the MONITOR jack. To use
monophonic headphones, a special stereo-to-mono headphone
& For more
information on dBr
and the reference
value, see the section
on Units, starting on
page 3-26.
3 Operation
Operational Overview Front Panel Controls and Connectors
ATS-1 Dual Domain User's Manual 3-5
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