Timewave PK-900, Operating Manual

Page: 199 / 392

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AUdelay "n/n" Default: 2/2 (20 msec.)
Mode: Baudot, ASCII, FEC, FAX, PACTOR and Packet Host: AQ
_________________________________ Parameters: __________________________________
"n" - 0 - 120 specifies in units of 10 msec. intervals, the delay between
PTT going active and the start of the transmit AFSK audio tones on
each PK-900 Radio Port.
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In some applications it may be desirable to create a delay from the time that
the radio PTT line is keyed and the time that audio is produced from the
PK-900. Most notably, on HF when an amplifier is used, arcing of the
amplifier relay contacts may occur if drive to the amplifier is applied before
the contacts have closed. If arcing occurs, increase AUDELAY for that Radio
Port slowly until the arcing stops.
In VHF or UHF FM operation, some synthesized transceivers may produce
undesirable spurious emissions, if audio and PTT are applied at the same time.
These emissions may be reduced by setting AUDELAY to roughly 1/2 of TXDELAY.
Please note that AUDELAY must always be less than TXDELAY. It is advisable that
AUDELAY be set lower than TXDELAY by a setting of 10. For example, you have
determined that a TXDELAY of 20 works well for your transceiver. Subtracting 10
from 20 yields 10, which is the recommended setting for AUDELAY. If a setting
of AUDELAY of 10 is too short, then set both TXDELAY and AUDELAY higher.
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AUTOBaud ON|OFF Default: OFF
Mode: Command Host: Ab
_________________________________ Parameters: __________________________________
ON - Autobaud Routine always present at Power-ON or RESTART.
OFF - Autobaud Routine active at Power-ON only if battery jumper is removed.
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When AUTOBAUD is OFF (default), the unit performs the autobaud function only
when powering ON or after a RESET. When AUTOBAUD is ON, the PK-900 performs
the autobaud routine EVERY time it is powered ON, and EVERY time the RESTART
command is entered. The stored parameters (e.g. MYCALL) are saved if the
battery jumper is connected. The unit displays the autobaud message at the same
rate as the last setting of TBAUD. AUTOBAUD ON is helpful when moving the unit
from one computer to another, where the terminal data rates are different.
In the autobaud routine, only one asterisk (*) is needed to set the terminal
speed TBAUD. The autobaud routine detects 110, 300, 600, 1200, 2400, 4800 and
9600 baud, at either 7 bits even parity, or 8 bits no parity.
3/93 A-21