ON / OFF switch
The transmitter is switched on and off with the ON / OFF switch. This also activates a connected Morse code key. The Go! button for the transmission mode in Morsechat is inactive when the transmitter is not switched on.
The ship’s transmitter has the approved frequencies, which can only be set using the switches for 500, 410, 425, 454, 468, 480 and 512 kHz – of course only after the ON switch has been pressed. The active switches are shown in bright green, the inactive ones in gray. In contrast to the main receiver, the frequencies cannot be set here via the display.
Chat / Key switch
This is used to switch between the operating modes Morse chat and Morse key. In the ‘Key’ operating mode, the oscilloscope can also be switched on at the top of the control panel to check the InSig and OutSig signals. InSig is the input signal as HOERWACHE receives it from the web browser. OutSig is the shaped square wave signal which HOERWACHE subsequently decodes and forwards to all connected stations via the Internet.
MIC rotary knob
This is used to set the microphone level if a Morse code key is connected and ‘Key’ has been selected via the chat / key selection.
The set level (signal) must be greater than the threshold value set in the oscilloscope.
POWER rotary knob (no function!)
This can be used to increase or decrease the output a little. This may give you a slightly larger range. The program has a distance and power-dependent volume control, i.e. more distant and weaker stations are poorly received.