front panel displays
39
operating manual
The front display of the AV32R is a so called ‘Vacuum Fluorescent
Display’ (VFD), a technology known for excellent readability and
brightness. The average life of a VFD is well over 10 years, requir-
ing no maintenance. However, a VFD will slowly reduce its maxi-
mum brightness over time. That's why we set the
High Level
to 7
out of 10, allowing you to re-adjust its brightness during the years.
However, only those segments of a VFD which are illuminated will
become darker over time. So if you show the same information at
high brightness, e.g.
VOL -30.0
, then only those segments making
up this information will darken over time, whilst all others will stay
bright. As a result if you show another information then it will
consist of dark (=aged) and bright (=unaged) segments, giving an
uneven brightness.
This can be prevented
by configuring the display to switch off after
a few seconds, as described page 39.
aging of the
display
HINT!
GRR00892.01-AV32R OPER 3.7x 6/14/02 9:34 AM Page 39