4. LED’s
4
LED's
Figure 8: The PTC-IIIusb front
The
SCS
PTC-IIIusb is equipped with 7 dual-colour LED´s to display the most essential status
information and a blue single-colour LED to show Bluetooth activity. The meaning of the
LED´s is explained as follows. Described from left to right.
USB LED:
This LED is on the very left side. It indicates traffic on the USB port by flashing red and green.
Bluetooth LED
This LED is the second from left. It indicates traffic via the Bluetooth connection with flashing
blue.
TFC/ERR:
This LED is lit green (Traffic) when the system transfers data and the channel is in good
condition.
In STBY condition (but not in Listen mode) it serves as channel busy indication and is lit when
the channel is occupied.
In Packet-Radio it serves as Carrier-Detect (CD) indication.
When it is lit red or orange (
Error
or
Request
condition), a data or control packet contains
corrupted or repeated data, and the data will not be displayed.
P3/P2/P1:
This LED shows the PACTOR-mode when connected or in LISTEN-mode. PACTOR is
abbreviated with the letter “P” here. When lighting green, the unit is operating in P3 mode
(PACTOR-III). In P1 mode it is lighting red and in P2 mode it is lighting orange.
QUAL:
In unconnected/STBY state (e. g. while receiving RTTY, PACTOR Unproto, etc.):
See below (Lock/Tune).
In connected State (PACTOR):
This LED displays the on the air connection
quality
by changing colour between red, orange
and green. Dim red means the poorest condition, bright green shows the best possible link
condition. The transition from
poor
to
best
has the following steps: very dim red -> dim red ->
red-> orange -> very dim green -> dim green -> green.
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