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dlm46007(at)cox.net
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 Posted: Sat Dec 29, 2007 5:05 am Post subject: XRX CAS system |
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I just returned both XRXs that I was sent. The first system had a power issue such that it rebooted itself about o dozen times over about 6 hours of usage. These occurred using four different power sources, two alternator sources which should have been 13VDC+ , two batteries, and two different power cords. I called the factory and they indicated that the unit should be returned for warranty service. The replacement unit was immediately sent from Marv Golden and it reset once on battery power and once on the alternator. I came to the conclusion that the problem was probably a voltage drop on the very small wire size used in the power cord; it is the same cord as supplied for the MRX which uses about 20% of the XRX power. I believe the reset problem can be fixed by Zaon using a properly sized power plug.
Some observations during use (5 flights)
Traffic was definitely easier to spot given the suggested bearing to the traffic.
Identification of traffic below where the transponder antenna was shielded by the target airframe, made traffic alerted late or not at all.
The second XRX also had the problem of identifying my aircraft transponder as target traffic and display 0.0 NM 0 FT with the ALERT. This can be fixed by the factory as it was on my MRX several years ago. My transponder antenna was clean at the time.
The compass should definitabely be calibrated. Calibration can take place in smooth air using the autopilot on GPS track of 000. It gives the "God's eye view" proper orientation.
LCD display is more difficult to see (than MRX LED) with sunglasses and in bright light
traffic distances differ between the MRX and XRX; visually the XRX seem to be a little more accurate. The MRX seemed to show slightly larger distances.
Although the XRX will display on a GRT and other EFIS, I did not try because I did not have the extra serial port required. Note however the display is either not both. The traffic displayed on the EFIS is not duplicated on the XRX; the XRX display shows a standard message identifying the EFIS.
In summary the XRX is an improvement on the MRX, just not a three times the price improvement. I will continue to use the MRX to "wake me up" and keep my eyes outside. Hope this helps some in their decision making. Now if they ever come up with an economical GDL solution!!!
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