USER MANUAL · TJ1GD REMOTE X6100

CW

CW decoder with automatic signal finding, and keyboard sending with macros. Plus why the radio switches to U-DIG while transmitting.

Receiving and the decoder

1. In the CW tab switch CW on.
2. Choose the radio mode: CW (the radio's narrow filter, best reception) or U-DIG.
3. Pick a station: click (tap) its trace on the audio waterfall (0–1500 Hz). The orange band shows what the decoder reads.

• Ton … Hz – tone of the station being read (250–1400 Hz, default 600).
• Auto – the decoder looks for the strongest signal; it only jumps to a clearly stronger one (by more than 6 dB).
• Lamp – flashes with every dot and dash received.
• WPM and S/N – speed and signal-to-noise (speed shown from 7 dB S/N).
• Kopiuj – copies the text; ↺ Wyczyść i czytaj od nowa – clear and relearn the speed.

Sending from the keyboard

First: Zezwól na nadawanie in the transmit section, and your call in the FT8 panel (Mój znak, used as {MY}).

1. Type in Pisz i Enter = nadaj · Esc = stop and press Enter (or Nadaj). You can keep typing while sending – text is queued.
2. Set the speed with the WPM slider (10–40) – = odbiór takes the speed of the station you're reading.
3. Esc or the “● NADAJE – Stop” button stops at once.

Macros

{DX} is the Jego znak (his call) field; ← z odczytu fills it with the last call the decoder read. After CQ and QRZ? the decoder moves to your own tone to read the replies.

Transmit tone

• = RX … Hz (odpowiadam) – you transmit exactly on the station you read (zero-beat). Default.
• stały … Hz (CQ) – a fixed tone, e.g. a clear spot to call CQ. Change it with −50/−10/+10/+50 or by right-clicking (Shift+click; long press on the phone) the waterfall.
• słuchaj na TX – sets reception to your transmit tone.
• Poziom – transmit level (−30…0 dB); set it so ALC barely moves.

Why U-DIG when transmitting and CW when receiving?

The app sends CW as a keyed audio tone streamed to the radio over the network – like FT8. The radio's CW mode does not take external audio (it transmits only from a key plugged into the radio), so transmitting needs the digital mode U-DIG. Receiving, on the other hand, is better in CW mode with the radio's narrow CW filters.

So when the radio is in CW mode, for each over the app:

1. remembers the mode and frequency,
2. switches the radio to U-DIG and shifts the dial so the tone lands on exactly the same frequency on the air,
3. waits for the radio to confirm (up to 3 s) and only then transmits,
4. after transmitting, returns to CW on the original frequency.

If the radio does not confirm the switch, the app does not transmit and restores CW. In U-DIG nothing is switched.

How the frequency is calculated

In CW mode the radio hears a carrier at dial frequency F as a tone equal to the radio's CW pitch P. In U-DIG a tone t goes on the air at dial + t. So that the sent tone lands in the same place, the app sets the U-DIG dial to F − P.

Problems