Fldigi and signalink setup windows 10 full#

You should try the the above adjustments at different audio frequencies. You will appreciate this the first time that you are working a weak PSK DX station and someone blasts through and captures your AGC. You should always use the minimum power necessary to maintain good comms, remember that even if you are clean at 100 W you signal will be so strong among the QRP signals that it will overpower the AGC on many receivers that are working another digital station within the same SSB bandwidth that you are on. All digital signals that fldigi generates will be limited to this peak-to-peak voltage. You can use any level below this and be assured that your output signal will be clean. You can use the fldigi transmit attenuator to make small adjustments in the output power to compensate for variations in the SSB transmit filter. You are now transmitting at maximum output power without distortion. Reduce the Mixer audio output until the ALC is disabled. That will probably be at about 30 watts output if the transceiver is rated at 100 watts.

Slowly bring up the Mixer audio output level until your rig's ALC just starts to function (a light blinking or a meter showing this condition). Set the fldigi transmit attenuator to -3 dB (control to the left of the AFC button)Įnable the 'Tune' mode in fldigi.

Fldigi and signalink setup windows 10 full#

Set the operating system audio output mixer control to about 10% of full scale output. Make sure your transceiver's speech compression control is OFF On my Icom 7100 and Yaesu FT991A that is 100 watts. If available, set the transceiver power level control for maximum power output. I recommend starting out with a dummy load, but an 'off hour' for a band might work just as well if you do not have a dummy load. Here is the way to set up your transceiver for a clean signal. But you absolutely cannot tolerate that with the digital modes. In fact, that is what an analog RF compressor does, overdrive and then subsequent filtering. A little overdrive on a voice channel can be tolerated to a degree. Every modern SSB transmitter uses some automatic level control ALC for preventing overdrive for SSB voice. None will exceed this value, even the simultaneous multi-tone modes like Throb. The peak amplitude of this signal is the peak amplitude of every modem signal generated by fldigi. The 'TUNE' button generates a continuous single frequency audio signal at the exact frequency to which the waterfall cursor has been set. You can set up your computer / transceiver for good solid performance without excessive drive. There is absolutely no reason for a transceiver driven by fldigi to exhibit this type of performance. Too often you see an overdriven signals on the digital sub-bands multiple audio sidebands on PSK, splatter from overdriven MFSK and RTTY. The last step is usually needed to insure that the settings are not lost when the operating system is closed and restarted. The waterfall palette used is 'default.pal', and the received signal is about 20 dB above the noise floor.Īpply and save the changes. The three signal views should be similar to this with the level/range controls set to -20 and 70 respectively. Remember that changing the WF/FFT/SIG level and range controls DOES NOT effect the decoder signal path.

You can then proceed to adjust the waterfall/fft appearance when you have the audio Rx level adjusted correctly. The colors can be set to suit the users' color vision. The default settings will be good for most users. The transition levels can be adjusted on the 'Signal Level' configuration panel. RED - signals too high, danger of decode errors YELLOW - signals level high, but still OK

The diamond indicator to the left of the fldigi AFC button will be colored as follows: The peak signals do should not exceed the upper/lower gray lines on the display. Make sure that the input gain controls are not set too hot. Then set the transceiver to an active portion of the digital band 14.070 MHz for PSK or 14.074 MHz for JT type digital signals. Adjust the audio path gain transceiver audio, external audio codec gain, and operating system gain for a noise level that is about -50 dB on the VU meter. Set your transceiver to a portion of the band with no signals 14.065 MHz might suffice. If your sound card a/d (also referred to as codec) is functioning correctly there should be no signal offset and the signal will be centered vertically about the x-axis.