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USER'S GUIDE
4.5.4.1
LED Status and Mode Indicators
After selecting AMTOR, the PK-232 displays system status on its LEDs:
STATUS:
MODE:
Type
ARQ (SELCAL of distant
STATUS:
MODE:
These LEDs show that your transmitter is in the SEND condition, in the "phasing" part
of an ARQ selective call. Your transmitter will key on and off sending the distant sta-
tion's SELCAL. As soon as your PK-232 is synchronized with the distant station, the
LEDs change:
STATUS:
MODE:
Verify the link by typing a few <RETURN>; watch the display. Your traffic will now be-
gin to flow as you type characters. If
played as they are acknowledged by the distant station. The IDLE and TFC LEDs will
change back and forth when you pause in your typing.
EAS
If
is ON, the delay between your typing and the appearance of your characters on
the screen indicates the quality of the radio link quite accurately. The better the link be-
tween you and the distant station, the faster your typed characters will scroll across
your screen.
If your typing does not appear on your screen, the distant station is not receiving valid
data from you and the automatic error-detection and error-correction features of the
AMTOR ARQ mode begin to control the link. Depending on how band conditions affect
the link, the ERROR and RQ LEDs may light occasionally. If errors occur on the link and
the distant station sends RQ (Request for Repeat), the LEDs show:
STATUS:
MODE:
ERROR lit:
RQ lit:
If the link fails and you lose synchronization with the distant station, your PK-232 auto-
matically tries to reestablish synchronization with the distant station. The LEDs change
to show:
STATUS:
MODE:
PK232UG Rev. B 9/86
STBY lit
STBY lit
station). The LEDs change to:
SEND lit, PHASE lit
ARQ lit
SEND lit, TFC and IDLE lit alternately by data flow
ARQ lit
EAS
SEND lit, ERROR and/or RQ lit
ARQ lit
Your PK-232 has detected errors in the signals received from the dis-
tant station
Your PK-232 has received a "request for repeat" code from the distant
station
SEND lit, PHASE lit, ERROR and RQ alternately lit
ARQ lit
4-11
is set ON, your typed characters will be dis-
OPERATING MODES
64
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