You can easily build such a keying circuit two simple circuits are shownin The 'standard' way of keying FSK from MMTTY is using a separate serial SignaLink does not supply such a keying output, i.e. You will need some other means of providing the FSK keying signal. Plus TNC had a separate FSK keying output, but if you are not using the TNC, You can control PTT (TX/RX switching) viaĬAT, but it is not possible to key FSK via the CAT serial port. Input to a radio in FSK mode must be in the form of an on-off keying signal When your rig is in FSK mode it does not accept audio input the modulation I am keying the rig via CAT and just using the interface to get audio to the rig.ĪA6YQ comments below-Original Message. The narrower filters are not centered around the mark and space indicator lines in WW. It appears that unless I set the rig up in RTTY mode only the wide filter is usable. If I switch the settings to LSB Digital I can apparently key the rig, but hear no tones in my speaker. With WW set up to put the rig in RTTY mode I can key the rig and hear the audio but only get a carrier. I cannot seem to find a WW setup that works properly. I am using a Tigertronics Signalink USB interface for keying the transmitter via the 6-pin data port. The TNC alway gave me intermittent problems so I decide to switch to WinWarbler's MTTY engine for transmit.

Until recently I ran RTTY on my Icom 746Pro with a Kantronics KAM PLUS TNC set up for FSK keying. I was having this trouble a week or two ago and still haven't resolved the problem. The narrow filters are notĪvailable in AFSK (LSB_Data) modes. What am I doing wrong?That is the nature of Icom transceivers. Narrower filters are not centered around the mark and space The rig up in RTTY mode only the wide filter is usable. If I switch the settings to LSB Digital I can apparently key the The FSK signal is a KEYED (contacts open/closed or TTL High/Low) Has a dedicated 'RTTY' mode it is FSK which requires a FSK signal. Remember, except for the Elecraft K2 and Kenwood TS-440 the if a rig In the PKT (normally LSB) or DATA (newer rigs like the FT-8x7, 450,

With Yaesu transceivers Signalink requires operation USB (REV) - not RTTY which is FSK and requires a separate FSK (shift) With Icom, Kenwood and TenTec transceivers that means LSB (normal) or If you are going to use Signalink USB, you must operate RTTY as AFSK. No other tones.Signalink USB is not a RTTY (FSK) interface it is *ONLY* a soundcard. Up to put the rig in RTTY mode I can key the rig and hear the audioīut only get a carrier.

Signalink with mtty