PK-232 – MBX OPERATING MANUAL
COMMAND SUMMARY
4/91
A-41
166
FRI
ck "n/n"
Default: 0/0 (0 sec.)
Mode: Packet
Host: FF
Parameters:
"n" - 0 to 250, specifying the Frame Acknowledgment timeout for Meteor Scatter
work in 10 milli-second intervals.
FRICK is a short version of FRACK, meant to be used in Packet-Radio meteor scatter work. If
FRICK is 0 (default), the FRACK timer is then in use and the unit operates as before with the retry
timer in units of whole seconds. If FRICK is 1 to 250, FRICK overrides FRACK as the unit's retry
timer, and the retry timer is in units of 10 msec. up to 2500 mode. (2.5 seconds).
Unlike FRACK, FRICK does not take into account the number of digipeaters in the connect path.
FRICK assumes there are no digipeaters being used.
Note:
Do not attempt multiple packet connections while FRICK is active (1-250). In con-
trast to FRACK, which provides one retry timer per multi-connect channel, there is
only one FRICK timer in the PK-232. Each logical channel will try to use the same
FRICK timer, causing interference to the operation of the other channels.
Due to the sporadic nature of meteor scatter work, a Master/Slave mode can be enabled in the PK-
232 with User BIT 18 (UBIT 18). When UBIT IS OFF, Frame Acknowledge operation is as in pre-
vious firmware versions.
When UBIT 18 is ON, a master/slave relationship is established in Packet-Radio connections. This
is done to reduce the possibility of simultaneous transmissions by both sides of a packet connec-
tion. In this mode, the master station sends either an I-Frame or a polling frame upon the expira-
tion of FRICK (or FRACK if FRICK = 0). The FRICK or FRACK timer then starts counting again. The
master station therefore sends packets constantly, even if all its I-frames have been acknowl-
edged. The slave station sends nothing, not even I-frames, until it receives a polling frame from
the master. A station becomes the master upon its transmission of a SABM (connect) frame; a sta-
tion becomes the slave upon its transmission of a UA (acknowledgement of the SABM) frame.
Recommended settings for this method of meteor scatter work (both stations should use these
settings):
UBIT IS ON
RETRY 0
AX25L2V2 ON (default)
MLXFRAME 1
(CHECK doesn't matter)
FRICK n
where n is large enough to allow the other station time to send the start of
an acknowledgement frame
Note:
This is an experimental mode and we welcome any comments or suggestions you
might have. Please make them in writing and direct them to the Timewave Engi-
neering Department. Thank You.
FS
peed "n"
Default: 2 (120)
Mode: FAX
Host: FS
Parameters:
"n" -
0 to 4 selects the FAX horizontal scan rate from the table below:
Содержание PK-232MBX
Страница 1: ...PK 232 MBX Operating Manual MODEL PK 232MBX DATA CONTROLLER Timewave Technology Inc...
Страница 212: ...PK 232 MXB OPERATING MANUAL SCHEMATICS B 1 212...
Страница 213: ...PK 232 MXB OPERATING MANUAL SCHEMATICS B 2 213...
Страница 214: ...PK 232MBX OPERATING MANUAL PARTS PICTORAL 4 91 C 1 214 APPENDIX C PARTS PICTORIAL DISPLAY BOARD...
Страница 222: ...PK 232 MBX OPERATING MANUAL SPECIFIC RADIO CONNECTIONS 96 1 E 6 222...
Страница 223: ...PK 232 MBX OPERATING MANUAL SPECIFIC RADIO CONNECTIONS 96 1 E 7 223...
Страница 224: ...PK 232 MBX OPERATING MANUAL SPECIFIC RADIO CONNECTIONS 96 1 E 8 224...
Страница 225: ...PK 232 MBX OPERATING MANUAL SPECIFIC RADIO CONNECTIONS 96 1 E 9 225...
Страница 226: ...PK 232 MBX OPERATING MANUAL SPECIFIC RADIO CONNECTIONS 96 1 E 10 226...