Specifications

o Type <CTRL-F> to break the link and send your Morse ID.
Your PK-900 sends your call sign in Morse code, and then shuts
off your transmitter.
o Type <CTRL-C> to return to Command Mode, then type "R" to break
the link.
The "R" command breaks the ARQ link immediately and returns your
system to AMTOR Standby. This can be used as an "Emergency
Shutdown" if you need to take your transmitter off the air, but
it does not shut down the other station and should not be used.
7.3.6 LCD Status and Mode Indicator
The front panel LCD display provides mode and status information at a
glance. This is especially useful in AMTOR operation. The following
describe typical Status indications you will see.
Type "ARQ (SELCALL of distant station)." The Status changes to:
MODE: TOR ARQ PHASE
RADIO 1: TX on
This shows 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 station's SELCALL. As soon as your
PK-900 is synchronized with the distant station, the Status
changes to:
MODE: TOR ARQ TFC
RADIO 1s: TX on
Verify the link by typing a few <Enter>s; watch the display. Your
traffic will now begin to flow as you type characters. If EAS is set
ON, your typed characters are displayed as they are acknowledged by
the distant station. The Status will change back and forth from IDLE
and TFC whenever your typing pauses.
If errors occur on the link and the distant station sends REQUEST
(request for Repeat), the Status will show:
MODE: TOR ARQ ERROR and/or REQUEST
RADIO 1: TX on
ERROR: Your PK-900 has detected errors in the signals
received from the distant station
REQUEST: Your PK-900 has received a "request for repeat"
code from the distant station
If the link fails and you lose synchronization with the distant
station your PK-900 automatically tries to re-establish
synchronization with the distant station. The Status changes to show:
MODE: AMTOR ARQ PHASE
RADIO 1: TX on
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