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Addendum
Audio buzz in analog mode
The ARD9000 is popular and selling well, since its introduction to the amateur radio
market on May 2005. The supplied speaker/microphone works very well, as the
modem settings are optimized for this particular speaker/microphone.
Some of our customers have pointed out that if another microphone is used and the
audio settings not carefully adjusted, that the ARD9000 might not function correctly,
or that an audio buzz appears in analog mode.
To avoid such problems it is strongly advised to proceed as follows:
-Deactivate your transceiveris speech processor.
-If you wish to use your own speaker/microphone, you might need to adjust the MIC
IN pot on the bottom side of the ARD9000.
-Although the default ANA-OUT level should work for most transceiver types, it
might be necessary for you to adjust that level. If the level is too high, your
transceiver might overload and an audio buzz or other audio distortion might be
audible and transmitted. You can avoid this, by carefully reducing the gain with the
ANA-OUT pot.
If the above instructions are followed, then your own microphone should perform as
well as the supplied speaker/microphone.
It is not necessary to adjust the sound level pots if your unit is functioning correctly
from the beginning.
July 29, 2005
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