MFJ-1270C/1274C MANUAL ADVANCED OPERATION
Page 92
Most HF linear mode radios are MUCH faster than VHF FM radio. A
reasonable setting for HF work is 120 milliseconds (DEAdtime set to 12). This
should work fine with virtually any HF radio stable enough to consider using on
HF packet.
ACKTIME
0 - 250 (also 10 millisecond increments)
This represents the time required to send a response frame (with no I field
appended) at the baud rate being used on the radio port.
The current 100 millisecond default is close but should be adjusted for 1200
baud work to 130 milliseconds (ACKTime set to 13).
For 300 baud HF work this parameter should be set to 520 milliseconds
(ACKTime set to 52).
SLOTS
n 0<=n<=127
This parameter determines how many sides are on the slot time dice. SLOTS
represents an n+1 sided dice the MFJ TNC "throws" before transmitting. The
SLOTS command allows any number of slots from 1 thru 127 to be defined.
SLOTS (n)
REMARKS
1 Disables
Slotting
2
4
This should be the default setting
8
Use only if the channel is VERY busy.
16
VERY VERY VERY busy !
32
You get the idea.
64
128
Might as well print it out & send it in the mail.
The value used on a particular channel should be agreed on by the channel users.
Access to the channel will be equitably distributed among all users if everybody
is using the same value for the SLotmask and DEAdtime parameters.
The idea is to pick a value large enough that the probability of two queued up
stations picking the same value is relatively small. On the other hand, the value
chosen should be small enough that most of the time, ONE of the queued up
stations will have a significant probability of picking the first available slot. In
