John: Absolutely all major events would be well advised to scan not only for "interference" from outside sources, but transmitters whose signal is not so narrow band as it should be. As well as guys who swear they are on channel 18, but really are on 56 because they forgot to switch modules. Once you scan with a "real" scanner such as the Aero Spectra unit, you become immediately aware of what the reality is in radio frequency bleed over. Now, this is different from harmonic third order interference caused by several transmitters reflecting signals in a small area. What we found in Elmira at our aerotows is the worst offenders for splatter were radios equipped with after market rubber ducky antennas. We ended up banning them from being used. Other offenders were older FM systems which had not been to a shop for tune up in their lifetime. The aero spectra allows the analyzing of a very few channels and not only tells you the bleed over, but the strength of the signal. I am going to buy another one now before they are not available.
Endless Mountain Models http://www.scalesoaring.com email: [EMAIL PROTECTED] > -----Original Message----- > From: John Erickson [mailto:[EMAIL PROTECTED] > Sent: Monday, May 23, 2005 2:31 PM > To: Tom Kallevang; John Derstine; [EMAIL PROTECTED]; Soaring List > Subject: "Splatter" > > This idea of a "clean" transmitter is an interesting problem. I know this > list has a lot of radio professionals. Can a transmitter "leak" the > signal? > I know I've experienced this in some big hand launch contests when you > have > 12 radios on at the same time. I've had hits when I know no one is one my > channel. > > If it's true, shouldn't a transmitter frequency check be required at the > start of any large contest? > > JE > -- > Erickson Architects > John R. Erickson, AIA > > > > From: Tom Kallevang <[EMAIL PROTECTED]> > > Date: Mon, 23 May 2005 10:43:21 -0700 (PDT) > > To: John Derstine <[EMAIL PROTECTED]>, [EMAIL PROTECTED], > [email protected] > > Subject: REply: [RCSE] Had a chance to try the Freq Checker this weekend > > > > This would be a huge > > loss to the the R/C community, as you can actually eyeball if a Tx is > > clean or not without a scope and an advanced degree. RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off. Email sent from web based email such as Hotmail and AOL are generally NOT in text format
