If the same Dell with all the old cables ( CAT, USB, etc ) worked without a hiss then you need to check what changed. Start with grounding. One of the cables may have lost the grounded shield. You may have rearranged your desk and the cables run closer together. Maybe you always had this but usually ran SATPC32 with the volume low. The key is "What changed since the last time it worked okay for you?" Did you change the video resolution - if so put it back temporarily. Did you change external speakers? Is it the same with both internal and external speakers. If the external ones are noisy then your amp and speakers are picking up RF.
Is the hiss on the Dell speakers or on the radio speakers? What changed there? Cables, connectors, position. If on the radio, check that CAT cable between the Dell and the Radio.
Try it without the CAT cable plugged in, the cable to your rotator controller - you are removing antennas that my be picking up RF from your video.
Load other programs, your browser, email client and whatever else you have on there to see if the noise can be duplicated like SATPC32 then you know for sure some RF from your video card if getting into the sound system.
It is a matter of removing or changing one item at a time. Don't do 2 or 3 changes at the same time because you won't know which did the fix.
Think like Sherlock Holmes and eliminate potential causes.
Good luck.
-----Original Message----- From: amsat-bb-bounces@amsat.org [mailto:amsat-bb-bounces@amsat.org] On Behalf Of Bob- W7LRD Sent: October 10, 2009 5:59 PM To: amsat-bb@amsat.org Subject: [amsat-bb] satpc32 qrn
Hello-When I start up satpc32 on my Dell computer I get this annoying qrn hiss on 2M. Any simple fixes short of moving the computer further away? It is from the computer not the monitor.
73 Bob W7LRD
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