Timewave PK-232MBX, Руководство по эксплуатации

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PK-232 MBX – OPERATING MANUAL PACTOR OPERATION
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The Pactor UCMD commands are:
UCMD 0: Default 3, maximum 30. This command sets the number of correct
packets in a row that must be received before generating an auto-
matic request to change from 100 to 200 baud. Also see the com-
mand PT200 in 11.7.4.
UCMD 1: Default 6, maximum 30. This command sets the number of incorrect
packets in a row that must be received before generating an auto
matic request to change from 200 to 100 baud. Also see the com-
mand PT200 in 11.7.4.
UCMD 2: Default 2, maximum 9. This command sets the number of packets
sent in a baud rate speed-up attempt.
UCMD 3: Default 5, maximum 120. This command sets the maximum number
of Memory ARQ packets that are combined to form one good packet.
When this number is exceeded, all stored packets are erased and
Memory ARQ is re-initialized.
11.8
Monitoring ARQ Pactor Contacts with PTLIST
Use the "PTLIST" command to monitor ARQ traffic flowing between two stations linked in a
Pactor ARQ contact. Your PK-232 will try to synchronize with whichever of the two linked
ARQ stations is the Information Sending Station at the moment.
Monitoring two linked Pactor ARQ stations does not provide the error correction enjoyed by
the linked stations. Since your PK-232 is not part of the 'handshake" you do not generate
the request for repeat. Your PK-232 will check for the correct CRC error check and will not
display messages with errors. Missing blocks will be designated with four error symbols. The
default error symbol is the underline (_). See the command summary for ERchar, the error
symbol.
Your PK-232 will not print a block of data if that block contains the same sequence number
as the previous block. If the "ISS" (Information Sending Station) is repeating the same
block, you won't print it twice.
11.9 Pactor MailDrop Operation
The PK-232 allows Pactor as well as Packet access to the MailDrop. Messages that originate
in Packet or AMTOR can be accessed remotely in Pactor and messages that originate from a
remote Pactor station can be accessed by Packet and AMTOR users of your MailDrop. This
section of the manual talks about basic Pactor mailbox operation. Section 11.10 will discuss
how to pass message traffic from Pactor to Packet and AMTOR and vice versa.
Make sure that you understand MailDrop Operation in chapter 5 And the basic Pactor opera-
tion described earlier in this chapter before putting your Pactor MailDrop on the air.
11.9.1 Special Operating Considerations
The Pactor MailDrop has been designed with a "Watchdog" safety feature so that it may
perform safely without constant attention. If a remote station is linked with your Pactor
MailDrop and no traffic is passed for 5 minutes, the link will drop and your transmitter will
shut off.