Access Hub - Strange Signal Strength??

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  • Updated 3 months ago
I'm experimenting with my new Access hub and noticed that signal strength continually varies from 0 to 4 based on the IP screen details.  (It climbs from 0 to 4 and then gradually drops back to 0 and then repeats the cycle).  This cycle occurs over about a 10 minute time frame.

So, I decided to try some different orientations.  I laid the unit on it's side with the top pointing in the general direction of the 5 in 1 (125' away) and signal strength is rock solid at 4. (no deviation)

 Why is reception so much better when it's on it's side??
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davefr

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Posted 3 months ago

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John Z

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Interference from your WiFi router?
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davefr

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No, the deviation cycles occurred in numerous vertical sites far away from the router. (and any other electronic devices).  Now it's the closest it's ever been to my WiFi router (about 4') and rock solid when on it's side???????
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John Z

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OK, that takes the prize for Strangest Result. What sort of surface is it resting on? Metal? Non-metal?
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davefr

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wood shelf
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John Z

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SMH. Does it seem to need to point to the sensor, or is it just happy to lay on its side?
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davefr

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It's "happiest" on it's side and pointing toward the 5N1.

I just rotated it 180 degrees and laid it on it's side so it's pointing away from the 5N1 and the signal strength quickly dropped from 4 to 3 and then down to 1 over a few minutes time.

I put it back so it's pointing towards the 5N1 and it's back to 4 and staying that way.

It's almost like this thing's antenna wants to be horizontal and aimed towards the sensor????
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George D. Nincehelser

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There is an "axial-mode" for helical antennas, but the dimensions of the antenna wouldn't seem effective for this frequency.

Weird.
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John Z

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Yup, weird. For a short tightly wound vertical helix, a quarter wave vertical is a reasonable approximation. Both are dead, when pointed end on. I am kind of stuck on the idea that davefr has a noise source somewhere that he has nulled out with this unconventional orientation.
(Edited)
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John Z

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The antenna in the 5n1 is vertically polarized. In theory you should get best results when Access matches that by standing upright Further, when you point the top of Access at the 5n1, you are presenting the Access antenna "end on", which minimizes signal.

My head spins at how screwed up backwards that is in relation to theory.

But then, radio can sometimes be weird.