# Thread: Off axis test with 35.5 Kustom vs. Decatur

1. ## Off axis test with 35.5 Kustom vs. Decatur

Test method 1) done with radar antenna pointing up in the sky and radar detector pointed up in the sky rotating radar detector towards general direction of the radar antenna 2) done with radar antenna pointed up in the sky and radar detector pointing to the general direction of the radar antenna on a horizontal axis(radar detector parallel to the ground).

V= vertical axis -[lower number the better]
H= horizontal axis - [higher number the better]
ND= no detection from radar detector

Distance from radar antenna was 645 ft. measured with a prolaser 2.

NOTE: Numbers will be in degrees.

RD....... Kustom ....... Decatur

X50........ V = ND ........ V = ND
........ H = ND ........ H = ND

RX65........ V = 50 ........ V = 60
........ H = 7-10......... H = 7-10

V1 ........ V = 60......... V = 50
.......... H = 7-10 ......... H = 15

We also found out that the RX65 when rotated to the right will not pcik up the signal at 15 deg. but picks up signal when rotated to the left at 15 deg. in a horizontal plane. This was discovered by accident during testing with the decatur and was not able to test it with the kustom radar in vertical or horizontal planes. The V1 detected decatur at 15 deg to either left or right rotation.

Conclusion: The numbers does not really make much difference in real world performance because of reflection, refraction and bounced signal.
The myth of stating that decatur is harder to detect or kustom is harder to detect is not true. All RD's tested was not able to detect both 35.5 radar systems past 15 degrees in a horizontal plane with radar antenna pointing up in the sky. Even with the decatur having the smallest antenna, detection was not affected.

The numbers are pretty much even with the V1 and RX65 in USA mode. I was not surprised to see the X50 not performing well since i have done the test before on video.

Test results also concluded that even the RX65 having the same platform as the X50 beats the X50 big time and was neck to neck with the V1 during this tests.

NOTE: The graph isn't too good and tried to correct the alignment but it did not work like i wanted it to be.

Radar units used was a Kustom Golden Eagle and Decatur Speedtrack 35.5 GHz Ka band.

Test done by 10-8 and yours truly.

2. ## Re: Off axis test with 35.5 Kustom vs. Decatur

Originally Posted by Azonehits
...We also found out that the RX65 when rotated to the right will not pick up the signal at 15 deg. but picks up signal when rotated to the left at 15 deg. in a horizontal plane...
Now, that is interesting -- very interesting indeed. What was to the right of the radar gun? Any power lines or power transformers either much further off to the right side or in the distance? Any homes with satellite dishes? Its already known that phase cancellation can and usually does occur within any radar horn off-axis. Around five years ago there was a pole mounted power transformer that always set off my RD on K band during the dead cold of winter. Nearly all of these old transformers have now been replaced throughout my county. Anyway, I'm thinking more along the lines of some type of interference.

3. 10-8 and I just discovered it by accident with the decatur unit and have no comparison. when we tested the vertical axis rotation - radar and radar detector pointing up where the radar detector was rotated to the right towards the direction of the radar unit, the RX65 detected the radar source as seen on the chart. There where no power lines or houses in the immediate area. All we can think of it was that there were trees to the left about 300 ft. away.

The purpose of the test was not the performance of different radar detectors. I can say that we really only needed one detector to find out which 35.5 radar unit is harder to detect. There is a very good chance that the RX65 pick up the kustom unit when rotated to the right(horizontal axis) because i always pointed it that way during the test a couple of times. I just probably did not take notice since the RX65 pick up the radar signal until we got to test the decatur. Maybe the GOL team can do some testing in the future.

One thing to note in this test with the radar antenna pointing up in the sky is, radar detector was detecting most likely the side lobe part of the radar source. In real world experience, you will most likely get the front lobe reflected,refracted and bounced signal and will greatly show big variances on each and every encounter.

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