Glossary entry (derived from question below)
English term or phrase:
electromagnetic 0º
English answer:
electrical beam tilt (0º = no tilt)
Added to glossary by
Charles Davis
Dec 8, 2015 15:30
8 yrs ago
English term
Spain
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electromagnetic 0º
English
Tech/Engineering
Aerospace / Aviation / Space
Hi,
I would appreciate your help with this sentence, explaining how to express "electromagnetic".
Context is a military and civil radar, and it is explaining how to set it up. This is part of a proofreading job so, obviously there are mistakes.
"Ensure that at first the SSR antenna is set to a tilt of 0º (electromagnetic)
...
In the first step, the tilt will be adjusted in such a way that the electromagnetic 0° of the antenna can be referenced by means of the SSR elevation scale.
...
With this setting, it is ensured that the SSR antenna is tilted to 0° electromagnetically speaking."
Thanks :)
Robert
I would appreciate your help with this sentence, explaining how to express "electromagnetic".
Context is a military and civil radar, and it is explaining how to set it up. This is part of a proofreading job so, obviously there are mistakes.
"Ensure that at first the SSR antenna is set to a tilt of 0º (electromagnetic)
...
In the first step, the tilt will be adjusted in such a way that the electromagnetic 0° of the antenna can be referenced by means of the SSR elevation scale.
...
With this setting, it is ensured that the SSR antenna is tilted to 0° electromagnetically speaking."
Thanks :)
Robert
Responses
| 3 +4 | electrical beam tilt (0º = no tilt) |
Charles Davis
|
| 2 -1 | Electromagnetic North 0° |
Bashiqa
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Change log
Dec 22, 2015 04:38: Charles Davis Created KOG entry
Responses
+4
3 hrs
Selected
electrical beam tilt (0º = no tilt)
I think it's probably talking about electrical beam tilt, whereby the radio signal from a transmitter is directly downwards (or upwards, in principle, though it's practically always downwards) by electrical means, tweaking the phasing, instead of by actually tilting the antenna itself (mechanical beam tilt). Radio waves, used for radar, are electromagnetic waves, so I suppose that's why they use the word here. 0º would mean with no tilt at all from the horizontal.
https://en.wikipedia.org/wiki/Beam_tilt
"antenna electrical beam tilt: The shaping of the radiation pattern in the vertical plane of a transmitting antenna by electrical means so that maximum radiation occurs at an angle below the horizontal plane."
http://www.its.bldrdoc.gov/fs-1037/dir-003/_0315.htm
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Note added at 3 hrs (2015-12-08 18:32:28 GMT)
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Sorry: "is directED downwards" in line 1, not "is directly downwards".
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Note added at 15 hrs (2015-12-09 06:59:14 GMT)
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Hi Robert
I'm not claiming to be an expert in this area, but I think you might express these sentences as follows:
Ensure that the SSR antenna is initially set at an (electrical) tilt of 0º.
In the first step, the tilt will be adjusted in such a way that the electrical 0° of the antenna can be referenced using the SSR elevation scale.
See e.g.
"Calibration parameters [...]
Tilt: electrical 0º, mechanical 0º"
http://cordis.europa.eu/docs/projects/cnect/9/317669/080/del... (p.22)
This setting ensures that the electrical tilt of the SSR antenna is 0°.
https://en.wikipedia.org/wiki/Beam_tilt
"antenna electrical beam tilt: The shaping of the radiation pattern in the vertical plane of a transmitting antenna by electrical means so that maximum radiation occurs at an angle below the horizontal plane."
http://www.its.bldrdoc.gov/fs-1037/dir-003/_0315.htm
--------------------------------------------------
Note added at 3 hrs (2015-12-08 18:32:28 GMT)
--------------------------------------------------
Sorry: "is directED downwards" in line 1, not "is directly downwards".
--------------------------------------------------
Note added at 15 hrs (2015-12-09 06:59:14 GMT)
--------------------------------------------------
Hi Robert
I'm not claiming to be an expert in this area, but I think you might express these sentences as follows:
Ensure that the SSR antenna is initially set at an (electrical) tilt of 0º.
In the first step, the tilt will be adjusted in such a way that the electrical 0° of the antenna can be referenced using the SSR elevation scale.
See e.g.
"Calibration parameters [...]
Tilt: electrical 0º, mechanical 0º"
http://cordis.europa.eu/docs/projects/cnect/9/317669/080/del... (p.22)
This setting ensures that the electrical tilt of the SSR antenna is 0°.
Peer comment(s):
| agree |
DLyons
: Yes, I think that's it.
59 mins
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Thanks, Donal :)
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| agree |
Jennifer Levey
: Yes. The ST should say 'electrical'. But your explanation is flawed: for an aeronautical radar the operational tilt will be upwards, not downwards. Downwards tilt is used in broadcast and cell-phone networks to focus coverage on nearby earth-bound users.
6 hrs
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You're right; I had temporarily forgotten we were talking about radar. In this case it would be upward. Thanks, Robin.
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| agree |
Phong Le
5 days
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Thanks, Phong Le!
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| agree |
acetran
7 days
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Thanks, acetran :)
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4 KudoZ points awarded for this answer.
Comment: "Selected automatically based on peer agreement."
-1
4 mins
Electromagnetic North 0°
If this is in space, obviously there is no North pole, but you need some sort of reference point for alignment purposes.
Not an expert by any means, but seems a fairly logical explanation.
Not an expert by any means, but seems a fairly logical explanation.
Peer comment(s):
| neutral |
Tony M
: But the text is talking about 'elevation', so this is not the heading in a horizontal plane. / I think it's just talking about the 'zero reference' or 'origin' that has been defined as 'horizontal'.
1 min
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Possibly electromagnetic 'field'.
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| disagree |
Jennifer Levey
: SSR refers to very ordinary terrestrial radar systems; nothing here is in outer space.
9 hrs
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Discussion