microHAM DXP Manual page 14

3.3 FSK DIDDLE
enables BLANK character insertion to FSK output on idle
•
NO/YES
•
Select YES. DXP will always insert BLANK character into output when output buffer is empty for
whatever reason. This keeps output data stream continuous and greatly helps the receiving decoder
since a continuous steam assures presence of 1.5 stop bits which is the only quick synchronization mark
if data is corrupted due to QSB or QRM.
3.4 FSK UOS
enables insertion of FIG shift after space followed by a number
•
NO/YES
•
YES selection recommended as it improves reliability. Valid only for FSK input from attached keyboard.
3.5 FSK ECHO
enables echo of transmitted characters on FSK port back to the computer
•
NO/YES
•
It is a novel feature not yet supported by any RTTY package. It provides exactly timed echo of
transmitted FSK data back to the logger in order to accurately and instantly control T/R switching (PTT
control). The echoed character is always sent back to computer when it is fully shifted to the radio. Tell
your digital mode application vendor about this feature.
4.1 PAPTT Tail
defines, for how long (delay) the PAPTT output will be held after PTT to radio is released
•
0-200ms
•
4.2 FS JACK
defines FOOTSWITCH jack function
•
FOOTSW/PTTIN
•
If set to FOOTSW, DXP generates both PTT and PAPTT outputs during TX. Input expects real
footswitch connected to FS jack.
If is set to PTTIN, DXP generates only PAPTT output during TX. PTT IS NOT sent to the radio in order
to avoid "stuck in TX" effect. Input expects PTT (TX GND, SEND, Key Out, Remote, etc.) output from
radio.
Set to PTTIN if you are using VOX or PTT over CAT and your amplifier keying is connected to PAPTT.
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