Today's Message Index:
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1. 04:26 AM - Garmin GNC300XL (Dave Ford)
2. 06:35 AM - Re: Garmin GNC300XL (Dennis O'Connor)
Message 1
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--> Avionics-List message posted by: "Dave Ford" <dford@michweb.net>
I have installed this Garmin GNC300XL and everything is working but there is a
slight background noise which I don't know if there should be total silence with
no transmission or not. The slight white noise is coming from the radio and
not the Flightcom intercom. It is not as loud as the unsquelched position,
cannot be adjusted by the noise pot., squelch pot. It almost sounds as if you
are monitoring a frequency at about 1/4 volume. Turning the volume down all
the way does not eliminate this noise. Turning the radio off does eliminate the
noise. Any suggestions?
Dave Ford
Message 2
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| Subject: | Re: Garmin GNC300XL |
--> Avionics-List message posted by: "Dennis O'Connor" <doconnor@chartermi.net>
Could be a ground loop in your audio panel, or could be a noisy audio amp
stage in the Garmin... I can't tell from your description... Did you get
the radio from a local source? Can you pull it out of the rack and take it
to the dealer/whatever and have him power it up and see if it is noisy on
the bench? Does anyone you know have a Garmin in their plane where you can
plug your unit into their rack and see if it is noisy there? Or, is there a
plug on the back of the Garmin where you can put your headset without going
through the airplanes audio panel?
Denny
----- Original Message -----
From: "Dave Ford" <dford@michweb.net>
Subject: Avionics-List: Garmin GNC300XL
> --> Avionics-List message posted by: "Dave Ford" <dford@michweb.net>
>
> I have installed this Garmin GNC300XL and everything is working but there
is a slight background noise which I don't know if there should be total
silence with no transmission or not. The slight white noise is coming from
the radio and not the Flightcom intercom. It is not as loud as the
unsquelched position, cannot be adjusted by the noise pot., squelch pot. It
almost sounds as if you are monitoring a frequency at about 1/4 volume.
Turning the volume down all the way does not eliminate this noise. Turning
the radio off does eliminate the noise. Any suggestions?
>
> Dave Ford
>
>
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