If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. |
|
|
Thread Tools | Display Modes |
#1
|
|||
|
|||
GPS intrference from Zaon PCAS ??
My GPS-NAV has been reliable until a few weeks ago with my Aero 1550
running GN2 when I started using my Zaon PCAS velcro mounted on my instrument panel cover which has it about 3-4" above the GPS-NAV. My GPS-NAV now goes into GPS wait frequently and has problems locking up to the constellation. Has anyone else had this experience? Could the oscillator in the PCAS be an interference source or its harmonics. I'll try to do some experimenting with and without it this weekend. Thanks - Carl V2b-7E |
#2
|
|||
|
|||
GPS intrference from Zaon PCAS ??
For what it's worth I use an MRX in several different gliders different GPS systems including a Cambridge 302 mounted close under where the MRX sits and I have no GPS problems. When you say 3"- 4" above the GPS Nav - do you have a model 20 or the 25 with the antenna mounted right on top? Are you sure you are not simply obscuring the signal? Other things nearby might obscure other parts of the sky and the MRX might be the final straw? Does the problem go away if the PCAS is turned off? Darryl On May 29, 7:47 pm, Carl wrote: My GPS-NAV has been reliable until a few weeks ago with my Aero 1550 running GN2 when I started using my Zaon PCAS velcro mounted on my instrument panel cover which has it about 3-4" above the GPS-NAV. My GPS-NAV now goes into GPS wait frequently and has problems locking up to the constellation. Has anyone else had this experience? Could the oscillator in the PCAS be an interference source or its harmonics. I'll try to do some experimenting with and without it this weekend. Thanks - Carl V2b-7E |
#3
|
|||
|
|||
GPS intrference from Zaon PCAS ??
Hey Carl,
Are you using the internal battery or connecting it to ships power? See previous threads here on RAS regarding interference when powering it from the ships power. Larry "Carl" wrote in message ups.com: My GPS-NAV has been reliable until a few weeks ago with my Aero 1550 running GN2 when I started using my Zaon PCAS velcro mounted on my instrument panel cover which has it about 3-4" above the GPS-NAV. My GPS-NAV now goes into GPS wait frequently and has problems locking up to the constellation. Has anyone else had this experience? Could the oscillator in the PCAS be an interference source or its harmonics. I'll try to do some experimenting with and without it this weekend. Thanks - Carl V2b-7E |
#4
|
|||
|
|||
GPS intrference from Zaon PCAS ??
I've been flying with the Zaon PCAS for over 1 year and I have never
had this problem. It is literally mounted 3-4" away from my Cambridge Model 20 on my glarehield. I do use the internal batteries to power it up. It works like a charm with no interference....Thanks - Renny On May 29, 8:47 pm, Carl wrote: My GPS-NAV has been reliable until a few weeks ago with my Aero 1550 running GN2 when I started using my Zaon PCAS velcro mounted on my instrument panel cover which has it about 3-4" above the GPS-NAV. My GPS-NAV now goes into GPS wait frequently and has problems locking up to the constellation. Has anyone else had this experience? Could the oscillator in the PCAS be an interference source or its harmonics. I'll try to do some experimenting with and without it this weekend. Thanks - Carl V2b-7E |
#5
|
|||
|
|||
GPS intrference from Zaon PCAS ??
|
#6
|
|||
|
|||
GPS intrference from Zaon PCAS ??
On May 30, 5:24 am, "01-- Zero One" wrote:
Hey Carl, Are you using the internal battery or connecting it to ships power? See previous threads here on RAS regarding interference when powering it from the ships power. If it is interference coming down the power cable, then it might be worth using a ferrite toroid to reduce the interference. The technique is quick, simple, cheap and non-invasive, but there's also a reasonable chance that the equipment already has such filters fitted internally. It will reduce both RF interference and also power spikes (the classic example being clicks on audio amplifiers caused by fridges turning on. Here's an handy example, but they are widely available. http://www.maplin.co.uk/module.aspx?ModuleNo=32799&doy=30m5#overview |
#7
|
|||
|
|||
GPS intrference from Zaon PCAS ??
On May 29, 7:47 pm, Carl wrote:
My GPS-NAV has been reliable until a few weeks ago with my Aero 1550 running GN2 when I started using my Zaon PCAS velcro mounted on my instrument panel cover which has it about 3-4" above the GPS-NAV. My GPS-NAV now goes into GPS wait frequently and has problems locking up to the constellation. Has anyone else had this experience? Could the oscillator in the PCAS be an interference source or its harmonics. I'll try to do some experimenting with and without it this weekend. Thanks - Carl V2b-7E Yesterday, I experienced the same problem with my newly installed Zaon working with a Cambridge 302 with GNII on my Aero 1520. The Zaon was powered from the ship's battery. The GNII indicated "GPS Wait", the Cambridge 302 showed only two GPS receive bars instead of the normal three bars, and the GNII wind calculation immediately went to about 60 kts. The Zaon was mounted on the top of the instrument panel cover just above the Cambridge 302. I'll try one of the filtering or internal battery solutions offered here and previously. Dave Discus CS -9Q |
#8
|
|||
|
|||
GPS intrference from Zaon PCAS ??
Nyal Williams
wrote: What does the Zaon do if two or more aircraft are within range? The Zaon will display the greatest threat. Should it determine that there is a new threat than the one currently displayed, "-NEW-" will be displayed for 2 seconds, followed by the new aircraft information. It follows the rule "accidents can only occur at your altitude", so it will display the aircraft with the least separation, however, vertical trend is also used to prioritize when two aircrafts are converging and both are within +-1000'. EX: If you are descending and another aircraft is below (within +-1000'), it will be the primary threat, even if another aircraft is closer in range and/or relative altitude above you and level. |
#9
|
|||
|
|||
GPS intrference from Zaon PCAS ??
, Nyal Williams wrote:
What does the Zaon do if two or more aircraft are within range? The Zaon will prioritize the threat.Should it determine that a new aircraft has become a greater threat than the one currently displayed, "-NEW-" will be displayed for 2 seconds, followed by the new aircraft information. It follows the rule that "accidents can only occur at your altitude". The aircraft with the least separation will be the primary threat, although it also uses vertical trend to prioritize when two aircrafts are converging and both are within +-1000'. EX: if you are descending and another aircraft is below within 1000', it will be the primary target, even if another aircraft is closer in range and/or relative altitude above you and level. Richard ASW19 Phoenix AZ |
#10
|
|||
|
|||
GPS intrference from Zaon PCAS ??
I do not know what the circuitry in the Zaon is like, but assuming there it
is the cause of the problem, then it would likely either be because it shielded the other unit or is putting out a signal that interferes with it. Assuming the Zaon is emitting a signal, my first thought is that it is as a result of a mix in the front end of it. That could be another transmitted signal - either by a nearby transponder or any other transmitter. That would require two signal sources, but the resultant signal could be in the band received by the gps receiver. Do some detective work. See if you can cause the signal level on the gps to change - or if the change is full time or only under certain conditions. If there is a spurious signal being emitted by the Zaon, then it could be through the power lead - and that could be attacted with ferrite beads. Colin |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
PCAS interfering with radio | John Sinclair | Soaring | 3 | March 12th 07 02:02 AM |
PCAS interfering with radio | John Sinclair | Soaring | 5 | March 9th 07 10:20 PM |
PCAS - Portable Collision Avoidance System | [email protected] | Soaring | 13 | October 14th 06 07:21 PM |
Zaon MRX testimonials requested | [email protected] | Soaring | 0 | June 27th 06 05:31 AM |
I got my Zaon XRX PCAS test flight | cpu | Products | 3 | January 27th 06 01:13 AM |