User Manual

9
Table 1. U519 Scanner LED Meanings
through the PC’s serial port. For more information on making this
connection, refer to page 13.
The upper right connector is the 25-pin test connector. For more
information on this connector, refer to Chapter 6.
LED Color Status
Power ON Red ON = scanner is turned on
and receiving power from
external power supply
Activity/Error Yellow Flicker = scanner detects tag
information.
Constant Flickering with no tag
in the scanning field =
(a) Noisy environment or
possible interference,
resulting in diminished tag
reading.
(b) Loose cable or bad
connector
Transmit On Green On = Scanner is transmitting
RF signals.
U519 FCC rewrite 2-22-01.p65 2/22/2001, 2:43 PM9