Specifications

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ARq aaaa[aaa] Immediate Command
Mode: AMTOR Host: AC
_________________________________ Parameters: __________________________________
aaaa[aaa] - The distant station's 4-character or 7-character SELCALL code.
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ARQ is an immediate command that starts an AMTOR Mode A (ARQ) SELCALL (SELective
CALL) to a distant station.
To begin the Mode A (ARQ) selective call type "ARQ" followed by the other
station's SELCALL:
Example: ARQ NNML (4-character SELCALL)
or ARQ VTMFFFF (7-character SELCALL)
As soon as a <CR> is typed, your PK-900 will begin keying your transmitter on
Radio Port 1 in the three-character AMTOR ARQ burst sequence. If the distant
station receives and decodes your selective call successfully, the two AMTOR
systems synchronize and begin the Mode A (ARQ) AMTOR "handshaking" process.
See the MYSELCAL and MYIDENT commands to enter your 4- and 7- character SELCALLs.
Other AMTOR commands are ACHG, ACRRTTY, ADELAY, ALFRTTY, ARQTMO, EAS, HEREIS and
RECEIVE.
An ARQ transmission may be terminated by typing <CTRL> D.
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ARQE Immediate Command
Mode: Command Host: Ae
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ARQE is an immediate command that switches Radio Port 1 of the PK-900 into the
ARQ-E receiving mode.
ARQ-E is similar to 1-channel TDM, except that the 7-bit code is different.
Like TDM most ARQ-E stations send idle signals for long periods of time. The
PK-900 can only phase on ARQ-E signals that are idling so this is not a
problem.
The SIGNAL Identification (SIAM) mode will identify ARQ-E signals for the user.
They are identified as "TDM ARQ-E:4" or "TDM ARQ-E:8," referring to 4- and 8-
character repetition cycles used in this mode.
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