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MFJ-1278B MULTI-MODE OPERATIONAL COMMANDS
TXDelay n Mode: Pactor Default: 2 (60ms)
Parameters:
n = Actual Delay Time equals n + 10ms * 5ms
Similar to AMTOR's DELAY and packet's TXDELAY. The actual delay yielded is equal
to (10ms + (TXDELAY * 5ms ) ). If the combined TXDELAYs of both stations involved in
the link exceeds about 180ms, then shortpath connections may not work, particularly at
longer distances. If difficulty is experienced, try using the Longpath Connect ("LC")
command to connect.
TXDELAYC nnn Mode: Packet Default: 2
Parameter:
nnn 0 thru 255 in 1 ms step
The time delay between when the MFJ-1278B depresses the PTT and when it starts sending
packets is specified in terms of how long it takes to send (TXDELAYC) characters at the
current radio baud rate. TXDELAYC controls a new timer that runs after the regular
TXDELAY time has expired (see TXDELAY).
High speed radio users will find this command useful because they can select transmit delays
much smaller than the 10 ms grains in TXDELAY. For high speed use, set TXDELAY to 0
and set TXDELAYC according to the formula below:
TXDELAYC = Radio-PTT-delay-time / Time-per-character
The time-per-character as related to the radio baud rate is as follows:
Baud Rate Time-per-character
9600 .83 ms
2400 3.30 ms
1200 6.70 ms
300 26.00 ms
Examples:
1. For a 200 ms 2 meter HT at 1200 baud, TXDELAYC is: