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#11
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Zaon MRX causing radio interference
jcarlyle wrote:
It was 300-400 feet off, sometimes above and sometimes below us - and we were doing a normal tow, not boxing the wake. Vents were closed (it was 35 degrees F on the ground before takeoff). Hopefully he and I will be able to fly together within the next month. I've got a Becker ATC4401 that reports the encoded altitude, so we'll be able to compare that with his MRX in real time at different separation distances and heights. Does his glider have a transponder in it? Do you know that the towplane encoder was working correctly? -- Eric Greenwell - Washington State, USA * Change "netto" to "net" to email me directly * "Transponders in Sailplanes" http://tinyurl.com/y739x4 * Sections on Mode S, TPAS, ADS-B, Flarm, more * "A Guide to Self-launching Sailplane Operation" at www.motorglider.org |
#12
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Zaon MRX causing radio interference
On Mar 24, 3:33*pm, Eric Greenwell wrote:
jcarlyle wrote: It was 300-400 feet off, sometimes above and sometimes below us - and we were doing a normal tow, not boxing the wake. Vents were closed (it was 35 degrees F on the ground before takeoff). Hopefully he and I will be able to fly together within the next month. I've got a Becker ATC4401 that reports the encoded altitude, so we'll be able to compare that with his MRX in real time at different separation distances and heights. Does his glider have a transponder in it? Do you know that the towplane encoder was working correctly? Lets play 20 questions... :-) Since the temperature was cold. Was this the first tow of the day? Any chance the transponder had just been turned on within a few minutes earlier and was still warming up? 17 more questions to go. Darryl |
#13
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Zaon MRX causing radio interference
Eric, the club G103 we were in does not have a transpondert. The
towplane encoder is working properly according to ATC. Darryl, it wasn't the first tow of the day, so yes, the encoder was warmed up. Let's ask the other 17 questions after I fly my transponder equipped glider with him and his MRX in his non-transponder equipped glider. -John On Mar 24, 6:06 pm, Darryl Ramm wrote: On Mar 24, 3:33 pm, Eric Greenwell wrote: jcarlyle wrote: It was 300-400 feet off, sometimes above and sometimes below us - and we were doing a normal tow, not boxing the wake. Vents were closed (it was 35 degrees F on the ground before takeoff). Hopefully he and I will be able to fly together within the next month. I've got a Becker ATC4401 that reports the encoded altitude, so we'll be able to compare that with his MRX in real time at different separation distances and heights. Does his glider have a transponder in it? Do you know that the towplane encoder was working correctly? Lets play 20 questions... :-) Since the temperature was cold. Was this the first tow of the day? Any chance the transponder had just been turned on within a few minutes earlier and was still warming up? 17 more questions to go. Darryl |
#14
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Zaon MRX causing radio interference
jcarlyle wrote:
On Mar 24, 6:06 pm, Darryl Ramm wrote: On Mar 24, 3:33 pm, Eric Greenwell wrote: jcarlyle wrote: It was 300-400 feet off, sometimes above and sometimes below us - and we were doing a normal tow, not boxing the wake. Vents were closed (it was 35 degrees F on the ground before takeoff). Hopefully he and I will be able to fly together within the next month. I've got a Becker ATC4401 that reports the encoded altitude, so we'll be able to compare that with his MRX in real time at different separation distances and heights. Does his glider have a transponder in it? Do you know that the towplane encoder was working correctly? Lets play 20 questions... :-) Since the temperature was cold. Was this the first tow of the day? Any chance the transponder had just been turned on within a few minutes earlier and was still warming up? Eric, the club G103 we were in does not have a transpondert. The towplane encoder is working properly according to ATC. OK, then the MRX should be using it's internal altimeter, as Darryl thought. If the encoder altitude output is a just a little erratic, you'd be able to notice while ATC might not. They would not be able to tell the difference between an unsteady climb and a slightly erratic encoder, I'm guessing. Darryl, it wasn't the first tow of the day, so yes, the encoder was warmed up. Let's ask the other 17 questions after I fly my transponder equipped glider with him and his MRX in his non-transponder equipped glider. Or, you could fly with the MRX in your glider, which would make the MRX use your encoder altitude instead of it's internal altimeter. That might tell you if the problem is the internal altimeter. -- Eric Greenwell - Washington State, USA * Change "netto" to "net" to email me directly * "Transponders in Sailplanes" http://tinyurl.com/y739x4 * Sections on Mode S, TPAS, ADS-B, Flarm, more * "A Guide to Self-launching Sailplane Operation" at www.motorglider.org |
#15
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Zaon MRX causing radio interference
On Mar 24, 1:49*pm, jcarlyle wrote:
It was 300-400 feet off, sometimes above and sometimes below us - and we were doing a normal tow, not boxing the wake. Vents were closed (it was 35 degrees F on the ground before takeoff). Hopefully he and I will be able to fly together within the next month. I've got a Becker ATC4401 that reports the encoded altitude, so we'll be able to compare that with his MRX in real time at different separation distances and heights. The MRX internal baro altitude is both displayable and adjustable. It should not require any other equipment, except an accurate altimeter set to 29.92, to determine if the problem is the MRX baro sensor. Andy |
#16
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Zaon MRX causing radio interference
Do you know if this function is available in older MRX versions? The
manual which came with my unit (bought August 2006) does not mention such a capability. I see that the latest manual on the Zaon web site does explain how to access this function, though. I'll see if my unit allows me to get to the altimeter calibration menu when I'm next at the airport. -John On Mar 26, 9:00 am, Andy wrote: The MRX internal baro altitude is both displayable and adjustable. It should not require any other equipment, except an accurate altimeter set to 29.92, to determine if the problem is the MRX baro sensor. Andy |
#17
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Zaon MRX causing radio interference
On Mar 26, 8:22*am, jcarlyle wrote:
Do you know if this function is available in older MRX versions? The manual which came with my unit (bought August 2006) does not mention such a capability. I see that the latest manual on the Zaon web site does explain how to access this function, though. I'll see if my unit allows me to get to the altimeter calibration menu when I'm next at the airport. Don't know when this feature was included. I would suspect it has always been there but maybe not documented in the user manual. I have a fairly early unit but I had it upgraded to the latest firmware last year as I needed the new function that distinguishes whether the internal baro sensor, or the host aircraft transponder, is being used for reference altitude. I had not attempted the baro calibration before the firmware update. If you have no host aircraft transponder, pressing the multifunction switch left will report the internal pressure alt being used. If you do this several times and always see the same pressure altitude it would suggest that the internal baro sensor is not erratic. If you find it is constant but not correct, then try the calibration procedure. I have found Zaon customer service to be excellent so don't hesitate to contact them if you need to. Andy |
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