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 GPIB 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 3-10.
& For more
information on dBr
and the reference
value, see the section
on Units, starting on
page 3-17.
3 Operation
Operational Overview Front Panel Controls and Connectors
ATS-1 Access User's Manual 3-5