User Manual

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Appendix A - Troubleshooting
Problem (G303i or G303e with serial interface option only): My PC
does have a Line input, but there is no such Line input shown in the mixer
line list in the demodulator set-up window.
Solution: The mixer line list is provided by Windows. It shows all
available mixer channels which are capable of full duplex operation. It
appears that the Line input of your sound card is not capable of full duplex
operation. This is the case with certain sound cards, most notably with
Creative Audigy 2. You will need to use the Microphone input instead. See
also the related problem below.
Problem: I have connected the receiver to the Microphone input, but
the sound is severely distorted.
Solution: You need to disable the microphone preamplifier – this is
located in the sound card control panel (note the button Advanced under
the microphone volume control). See also the problem below for another
possible cause of this problem.
Problem: I can hear the audio and tune the receiver, but the sound is
distorted.
Solution: Check if the AGC is switched on (i.e. either the Slow, Med
or Fast buttons are down – typically, the Med setting is used).
G303i or G303e with serial interface option only: Check the Input gain
in the demodulator set-up panel: it should be set just below the clipping level
(sometimes a bit lower if the sound card starts distorting before the clipping
is detected). If both settings are correct, try to reduce the sampling rate from
48000 samples/second to 44100 (also in the demodulator set-up). (Using
48000 samples/second should provide better performance if good quality
sound cards are used, but some sound cards are not able to provide good
quality sampling at this sampling rate.)