FLDIGI Users Manual  3.22
Configure ARQ/KISS I/O

Table of Contents

ARQ/KISS IO Configuration Panel

Locked IO Configuration Panel

I/O Configuration

I/O configuration panel as seen above allows the user to select one of the IO interfaces. Each of the two interface options are used for different purpose(s). ARQ is selected when the user requires the use of the FLDIGI suite of programs (FLARQ, FLMSG, FLAMP, etc). The KISS interface is used with Ax25/ARQ networking software. Currently the only software tested and verified to work with FLDIGI's KISS interface is BPQ32. See Using BPQ32 with FLDIGI

Any changes to the IP Address and/or port numbers requires FLDIGI restart.


ARQ IO Panel Options

To select ARQ I/O, mouse click on the [ ] Enable ARQ check box. If the checkbox is grayed out, this indicated the panel is locked. Deselect the [ ] Lock checkbox to gain access.

The ARQ section of the configuration panel allow the user to set the IP address and port number. Pressing the [Default] button set the fields to their startup values. In order for communications to occur both FLDIGI and the FLDIGI suite of program must be assign the same IP address and port number if the programs are used on the same computer. If the program are running on different machines then the IP Address must be set accordingly while maintaining the same port number. The IP Address entered is the destination Address for the recipiente program/host computer.


KISS IO Panel Options

To select KISS I/O, mouse click on the [ ] Enable KISS check box.

Setting and configuring IP address and ports numbers are described in the ARQ section.

Dual Port

Since the data exchange protocol is based on UDP/IP (connectionless) loopback issues can arise if the two programs are hosted on the same machine. By allowing more then one port number. The loopback condition can be avoided. Both programs must support dual port for proper communications.


Selecting this option enables Carrier Sense Multiple Access. Basically in conjunction with KPSQL it monitors for busy signals. When the frequency is clear a small variable delay is initiated preventing the transmitter from transmitting. This variance allows other CSMA stations time to monitor the frequency in an attempt to prevent/limit packet collisions. Only available when KISS I/O selected.

Ax25 Decoding

If the data received is using Ax25 protocol enabling this option translates the protocol into human readable form. Only available when KISS I/O selected.

When actived, only valid ax25 data will be displayed to the receive panel. No un-squelched random characters will be seen.

Busy Channel

Busy Channel when enabled and with the properly set threshold of the KPSQL squelch. Frequencies that are intermittently present within the bandwidth of the modem will inhibit the transmitter for the specified duration. This is a useful feature to prevent your station from capitalizing the frequency, allowing casual users to continue without interruptions from "BBS/Email" type operation.

To prevent your station from transmitting between the grap of the RSID and the data stream. Enable Busy Channel with a 1~2 second inhibit period.

KPSQL Attenuation.

Reduces the sensitivity of the KPSQL squelch. Useful when a direct audio card to audio card connection.

KPSQL monitors for differences in the signal strength within the bandpass of the modem. Making it tolerant to AGC variations from the radio.

Modem Selection Kiss I/O

Use of the KISS I/O places a limit on the number of available modems. These modems support 8 bit transfers. The slowest of these modems have been omitted and generally comprise of the BPSK, 8PSK, MFSK, THOR, Contestia, Olivia and MT63 at various baud rates. Any attempt to select a modem not supported FLDIGI will ignore the request. If you are unsure, open the event log under the Help menu and note a message indicating that particular modem is not supported.

Invalid Modem for KISS I/O


XMLRPC IO Panel Options

Setting and configuring IP address and ports numbers are described in the ARQ section.

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