Intermittent Operation

[twolimatango]

I have been running ANRB with good results for weeks now - 200+ targets but today....NOTHING.  USB light is flashing at me signal light is inactive.  Have tried everything i can think of to rectify this.  Changed Antenna from External to stock antenna, re-installed drivers and software and still the flashing USB light.  RB says Hardware connected and reports firmware status.  Totally stumped - any suggestions?  Am i looking at a dead radarbox or minimum sending it back for checking out?

[twolimatango]

Intermittent because I have had this a few times but normally clears if I unplug the box and restart

[CoastGuardJon]

Hi 2LT, if it's an intermittent fault, I would suggest the RB is AOK, if it fails - it fails big-time, and the most you'll be receiving direct is aircraft within a very few miles of you, probably 30nm radius at best.   If intermittent, far more likely to be a USB problem, try changing lead for a known good HQ one, and check that USB sockets appear to be firmly fastened to pcbs inside PC and RB.

[AirNav Support]

As CoastGuardJob says we would advise checking the USB cable first. We have sent you the return instructions if after using another cable its still the same.

[twolimatango]

Thanks - I have tried replacing the USB cable and still the same.  I'm near to W&S so will pop into Hockley today to get a their opinion.

[oldun]

hi twolima did you get any joy from w&s because mine is doing the same thanks  jeff.

[twolimatango]

hi twolima did you get any joy from w&s because mine is doing the same thanks  jeff.

Its been booked in for someone to take a look at. So.....have to wait and see.

[oldun]

ok thanks will you keep me informed please   leff

[twolimatango]

Well..........its back from W&S but.......

They replaced the F1 filter (whatever that is).  I have plugged it back in to the same setup I had before it went and I seem to have decreased range by approx 40 miles in the new polar diagram.  It has only been running an hour in fairness so i will leave it and see what happens after a few days running.  Before and after plots attached.

[twolimatango]

before repair

[bratters]

That's an interesting post 2LT.

Going back maybe two years I had a couple of filter problems and on each occasion I noticed a range difference on the return of the box  - one an improvement over standard performance, the other a detereoration.

Being non-tech I know absolutely nothing about filters however I would ask those who do whether these things are adjustable? Alternatively do they come with differing properties? Basically can a filter setting be adjusted for maximum/minimum response in any way and if so is there an optimum setting that maybe balances distance against the likelyhood of failure? Can these filters be tweaked ?

[Runway 31]

Comparing a polar diagram before and after with only an hours operation for the after shot is pretty meaningless.  How much running had it taken to get the original diagram, give it a while and then compare.

Alan

[twolimatango]

I'll give it a fair chance - a week should do it.  Happy that its working though don't get me wrong.

[twolimatango]

I'll give it a fair chance - a week should do it.  Happy that its working though don't get me wrong.

So..its been running a week and here is a combined polar diagram - one from before repair and one after, shown on the same map.  looks like I've lost a around 10 to 20% range.  I think in 'MyFlights' I am down around 25% to 30% in the number of aircraft  Was 200+ now 140 ish.  I don't know that it can be improved but I'll ask at W&S as its kind of nulled out the advantage I gained from my new antenna.