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PK-88 OPERATING MANUAL
DWAIT
'n'
Parameters:
'n'
0 to 250 specifies default wait time in ten-millisecond intervals.
DWAIT helps avoid collisions with digipeated packets.
Unless the PK-88 is waiting to send digipeated packets, DWAIT forces the PK-88 to
pause after last hearing data on the channel, for the duration of the DWAIT (Default
Wait) time, before beginning its transmitter key-up sequence.
Wherever possible, the value of DWAIT should be agreed on by all stations in a local
area when digipeaters are used in the area. The best value will be determined by
experimenting.
DWAIT is a function of the key-up time (TXDELAY) of the digipeater stations and helps
alleviate the drastic reduction of throughput that occurs on a channel when digipeated
packets suffer collisions.
DWAIT is necessary because digipeated packets are not retried by the digipeater, but
are always restarted by the originating station. When all stations specify a default
wait time, and the right value of 'n' is chosen, the digipeater captures the frequency
every time it has data to send - digipeated packets are sent without this delay.
Recommended settings of DWAIT for different types of packet station operation are:
TYPE OF OPERATION
Digipeaters
Local keyboards
PBBSs, Hosts
File transfers
Your PK-88 always uses a DWAIT value of 0 (zero) when you digipeat someone else's
packet. If DWAIT is set to any other value, the PK-88 simply ignores it.
NOTE:
DWAIT is inoperative when PPERSIST is ON as in KISS/TCP/IP operation.
Mnemonic: DW
TIME (in ms)
0
160
320
480
5-43
Default: 16
DWAIT VALUE
0
16 (default)
32
48
COMMAND SUMMARY
PK88-125
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