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PK-232 MBX Operating Manual - N3UJJ

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When TRFLOW is ON, the type of flow control used by the computer RECEIVING data<br />

in Transparent Mode is determined by how START and STOP are set.<br />

When TRFLOW is OFF, only "hardware" flow control (RTS, DTR) is available to the<br />

computer RECEIVING data from the <strong>PK</strong>-<strong>232</strong> in Transparent Mode.<br />

If TRFLOW is ON, and START and STOP are set to values other than zero, software<br />

flow control is enabled for the user's computer or terminal. The <strong>PK</strong>-<strong>232</strong><br />

responds to the user START and user STOP characters while remaining transparent<br />

to all other characters from the terminal.<br />

_______________________________________________________________________________<br />

TRIes "n" Default: 0<br />

Mode: Packet<br />

Host: TI<br />

_________________________________ Parameters: _________________________________<br />

"n" - 0 to 15 specifies the current RETRY level on the selected input<br />

channel.<br />

_______________________________________________________________________________<br />

TRIES retrieves (or forces) the count of "retry counter" on the data channel<br />

presently selected.<br />

If you type TRIES without an argument, the <strong>PK</strong>-<strong>232</strong> returns the current number of<br />

tries if an outstanding unacknowledged frame exists. If no outstanding<br />

unacknowledged frame exists, the <strong>PK</strong>-<strong>232</strong> returns the number of tries required to<br />

get an ACK for the previous frame.<br />

If you type TRIES with an argument the "tries" counter is forced to the entered<br />

value. Using this command to force a new count of tries is not recommended.<br />

_______________________________________________________________________________<br />

TXdelay "n"<br />

Default: 30 (300 msec.)<br />

Mode: Packet, Baudot and ASCII<br />

Host: TD<br />

_________________________________ Parameters: _________________________________<br />

"n" - 0 to 120 specifies ten-millisecond intervals.<br />

_______________________________________________________________________________<br />

The TXDELAY command tells your <strong>PK</strong>-<strong>232</strong> how long to wait before sending packet<br />

frame data after keying your transmitter's PTT line (default 300 msec).<br />

All transmitters need some amount of start-up time to put a signal on the air.<br />

The default value of 300 msec should work with almost all transceivers.<br />

In fact many of the newer transceivers can use smaller TXDELAY values. Crystal<br />

controlled transceivers can often use smaller values as well. On the other<br />

hand, tube-type transceivers and amplifiers can require a longer time to switch<br />

and may require TXDELAY to be increased. Experiment with the value to determine<br />

the shortest setting you can use in reliably in Packet.<br />

Baudot and ASCII use TXDELAY between PTT ON and the start of transmitted data.<br />

8/91 A-74<br />

From The <strong>N3UJJ</strong>.COM Document Library

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