Specifications

_______________________________________________________________________________
MARK "n" Default: Current modem mark frequency
Mode: Command Host: Mk
_________________________________Parameters_____________________________________
"n" - 500 to 3000 specifies the transmit mark frequency in Hz.
_______________________________________________________________________________
The MARK command is used to select a non-standard mark tone transmit frequency.
The mark tone frequency range is 500 to 3000 Hz. If the MARK command is
entered without an argument ("n"), the current mark frequency is displayed.
_______________________________________________________________________________
MARsdisp ON|OFF Default: OFF
Mode: Baudot and AMTOR, RTTY Host: MW
_________________________________ Parameters: __________________________________
ON - The PK-900 translates received LTRS characters to a <CTRL-O>, and
FIGS characters to a <CTRL-N> and sends these to the terminal.
OFF - The PK-900 operates as before in Baudot and AMTOR (default).
________________________________________________________________________________
The MARSDISP command permits the Baudot and AMTOR operator to detect and display
every character including LTRS and FIGS sent by the other station. The ACRDISP
and ALFDISP may be turned off to prevent extraneous carriage-returns and
Linefeeds from being sent to the display. If this data is retransmitted,
ACRRTTY should be 0, and ALFRTTY should be OFF. The <CTRL-O> and <CTRL-N>
characters will send LTRS and FIGS respectively.
________________________________________________________________________________
MAXframe "n/n" Default: 4/4
Mode: Packet Host: MX
_________________________________ Parameters: __________________________________
"n" - 1 to 7 signifies a number of packet frames.
________________________________________________________________________________
MAXFRAME limits the number of unacknowledged packets your PK-900 permits on
the radio link for each Radio Port. It is also the number of contiguous packets
your PK-900 will send in a single transmission.
The "best" value of MAXFRAME depends on your local channel conditions. In most
cases of local VHF packet keyboard operation, the default value of MAXFRAME 4
works well. When the amount of traffic is heavy, the path in use is poor as on
HF, you are using many digipeaters, you can actually improve your throughput by
reducing MAXFRAME. When operating HF packet try setting MAXFRAME to 1.
1/93 A-61