26
Model Three - Operation Manual
LCD Contrast
This selection determines the LCD contrast on the Model Three
display.
All signal levels below -40 dBmV (+20 dB
μμμμμ
V)
are displayed with lighter shade digits in all
measurement modes to indicate they are low
signal levels.
Shutdown Time
This selection sets the automatic shutdown timer.
Press the
F
1
F
1
key (or use the
__
and
keys) to change the
shutdown time. The selected time is displayed in the window near the
bottom of the display screen. You can select
ON
(always on until
manually turned off), or
3, 5, 10,
or
30
minutes (the Model Three shuts
itself off when there has been no Model Three activity for the selected
time interval).
A caution screen appears 20 seconds prior to automatic shutdown as
shown below.
This screen counts down the remaining time until shutdown and
displays the shutdown time setting.
Press the
__
key to darken the contrast and the
key
to brighten.
