---------------------------------------------------------- Avionics-List Digest Archive --- Total Messages Posted Fri 06/03/05: 4 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 07:11 AM - Blind encoder readout (Lmar) 2. 09:33 AM - Re: Blind encoder readout (David Lloyd) 3. 11:29 AM - Re: Blind encoder readout (Joe Dubner) 4. 03:03 PM - Re: Blind encoder readout (Doug McNutt) ________________________________ Message 1 _____________________________________ Time: 07:11:46 AM PST US From: Lmar Subject: Avionics-List: Blind encoder readout --> Avionics-List message posted by: Lmar Hi, Is there as way that I could read the altitude that my encoder is transmittitng. Might I also be able to adjust the encoder to read the correct altitude. While I can usually follow directions, I do not have an understanding of avionics or electronics. Thanks, Larry ________________________________ Message 2 _____________________________________ Time: 09:33:18 AM PST US From: "David Lloyd" Subject: Re: Avionics-List: Blind encoder readout --> Avionics-List message posted by: "David Lloyd" Larry, There are several portable gadgets on the market that will read what your encoder and transponder are transmitting. I don't have the details at the moment, but, if you peruse the Flyer mags, you will probably find an ad. However, the one I have seen a lot of is around $600. So, maybe someone has one to loan you for a weekend. You just put it on the top of the panel and go fly with the transponder on. It will display what the ground radar is receiving from you. David ----- Original Message ----- From: "Lmar" Subject: Avionics-List: Blind encoder readout > --> Avionics-List message posted by: Lmar > > Hi, > > Is there as way that I could read the altitude that my encoder is > transmittitng. Might I also be able to adjust the encoder to read the > correct altitude. While I can usually follow directions, I do not have an > understanding of avionics or electronics. > > Thanks, > Larry > > > ________________________________ Message 3 _____________________________________ Time: 11:29:59 AM PST US From: Joe Dubner Subject: Re: Avionics-List: Blind encoder readout --> Avionics-List message posted by: Joe Dubner Larry, One option is to buy and assemble an Altitude Encoder Test Box Kit from RST Engineering (http://rst-engr.com/rst/catalog/altitude_encoder_and_elt.html). The nine LEDs illuminate to show the state of your encoder's output lines and can be used with a chart of altitude vs. encoder output to decode your altitude and (possibly) adjust your encoder. See http://rst-engr.com/rst/articles/kpapr98/index.html I homebrewed a version of this tester but was unable to properly adjust my old TCI piece-of-junk-suitable-only-as-a-boatanchor blind encoder. Nowadays the tester still comes in handy to verify the output of my Dynon EFIS encoder or a local buddy's ACK encoder at field elevation. And with a small suction bulb applied to the static port, I can run the altitude up as desired for further testing. -- Joe Joe Dubner, K7JD 523 Cedar Avenue Lewiston, ID 83501 cell: (208) 305-2688 http://www.nicon.org/chapter328/jd/ On 03-Jun-05 07:11 Lmar wrote: > --> Avionics-List message posted by: Lmar > > Hi, > > Is there as way that I could read the altitude that my encoder is transmittitng. Might I also be able to adjust the encoder to read the correct altitude. While I can usually follow directions, I do not have an understanding of avionics or electronics. > > Thanks, > Larry ________________________________ Message 4 _____________________________________ Time: 03:03:44 PM PST US From: Doug McNutt Subject: Re: Avionics-List: Blind encoder readout --> Avionics-List message posted by: Doug McNutt At 07:11 -0700 6/3/05, Lmar wrote: > Is there as way that I could read the altitude that my encoder is transmittitng. Might I also be able to adjust the encoder to read the correct altitude. Remember that the transponder puts out your pressure altitude. No correction for the local barometric pressure is applied in the aircraft. It's done on the ground. That means that anything you build for comparison with your altimeter will have to include the appropriate arithmetic. -- --> The best programming tool is a soldering iron <--