Symbol PTC-2124, User Manual

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Chapter 3 Configuring TN-3270/5250
18 PTC-2124 User’s Guide
When the PTC is in suspend mode, you must press
the On/Off button to turn the PTC back on. Once
again, you are returned to the point at which you left
the application.
Backlight
The PTC’s backlight lights up the screen, making it
easy to read. The backlight can be turned on or off by
pressing the Backlight button.
To save power, the screen and backlight automatically
turn off when there has been no activity on the screen.
The duration of inactivity can be set by your
application program.
Battery power check
The PTC regularly checks the amount of power
remaining in the battery pack and the bridge battery.
Refer to the section titled "Low-
battery warning" on page 19 and
Chapter 11 for more information.
Before either battery is exhausted, the unit warns you
with a series of beeps. When you hear them, promptly
recharge the PTC’s battery pack.
Clock
The clock can be set using the MS-
DOS TIME and DATE commands. The PTC’s built-in clock keeps track of the date
(month, day, year, and day of the week) and the time
(hours, minutes, seconds, and tenths of seconds). The
clock operates continuously. How the clock is used
depends on your application program. For example,
the PTC can use the clock to show the date and time
on its screen or to time-stamp a file.
If the PTC’s battery pack and bridge battery
becomefully discharged, the date and time will be lost
and have to be re-entered.