User Manual

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Problem: I can hear the audio and tune the receiver, but the audio
drops-out occasionally, and the display is very sluggish, sometimes it even
freezes.
Solution: Close all other simultaneously running programs to reduce
the burden on the CPU. If the CPU usage shows consistently more than
80%, this may indicate insufficient CPU resources for the G303 application.
(Check the CPU usage under the Setup button in the demodulator window.
The CPU resource meter is at bottom left.)
Problem: I can hear the audio and tune the receiver, but the audio is
very noisy. The background noise level displayed on the spectrum scope
appears very high.
Solution: Make sure the Attenuator is switched off. Check that your
antenna is properly connected, the connector is not loose and that the
antenna cable is not damaged. Does the noise floor drop significantly if you
disconnect the antenna? If so, then the antenna is picking up too much
ambient noise. Try to improve the antenna, or move it further away from the
PC. (Additional noise-defeating measures may be in order; see also
Appendix C – Dealing With Interference.)
Problem: Reception is obscured with a buzzing interference.
Solution: Check for the sources of interference in your surroundings:
it could be fluorescent lights, a lamp dimmer, or some other household
appliance. Your PC (especially the monitor) could be also the culprit.
Unless you can suppress the interference at the source (which is not always
possible), the only solution is to install a better antenna, preferably an
outdoor one. Computer networks are especially noisy and if your PC is
connected to one, you will almost certainly need an outdoor antenna. If the
interference level varies periodically with peaks about 30-100 kHz apart, the
most likely culprit is the monitor or the video card. Switch the monitor off - if
the interference disappears then the cause is the monitor. Modern LCD
monitors generate much lower levels of interference than CRT ones. (See
also Appendix C – Dealing With Interference.)