- This topic has 11 replies, 1 voice, and was last updated 3 years, 10 months ago by
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Posts
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1)
Why do they have provided two options for tilt in antenna, ie
Electrical & Mechanical2)
What will happen if we have different degrees of tilt for mechanical & electrical at an antenna? say 2 degree for mechanical and 4 degree for electrical.
3)
What is the standard practice in industry for tilts (electrical & mechanical) to achieve the objective of
a) Coverage
b) Capacity
c) indoor coverage
4)
How can we check the values if tilt for mechanical and electrical for an antenna?
5)
How does remote electrical tilt work? Any special antenna?
Regards
MKT
Hi MKT…
1)One basic reason for diffrent tilts is, bcoz Electrical tilt is having less backlobe nd sidelobe as compared to mechanical tilt.
so in electrical tilt reduces the interference.2)There is no such standard practise followed…but wat i have seen is that 2 deg of electrical is default.
3)values of tilt can be seen physically….for electrical tilt we had a nobe at the bottom of the antenna….nd mechanical tilt is given at the upper end of the antenna….where a clamp is move to adjaust the tilt.
MKT,
I have written the formula to compute the tilt based on the cell range you need to achieve. Check the related post.http://www.erlang.com/forum/erlang/thread.htx?thread=4196
Standard practise in urban environment : 6 to 8 degrees tilt.
Electrical vs. mechanical : easier to set up, easier to modify, backlobe is tilted as much as the front lobe, less visual impact, remote adjustment possible.
So it is good to buy antennas with default 8 degrees electrical downtilt.
If mech and elect are put together (this is oftenly done), you just sum both tilts. 4+2 = 6 degrees of effective downtilt.
So if 8 degrees elec tilt is too much, you can always apply some uptilt. This will further reduce the backlode 🙂
Regards,Pix
why do mechanical and electrical tilt
how to prepare positive stop 7&8 connectors
can anybody provide me the formula for mechanical tilt(somewhat based on tan or tan inverse).
go there.. in the address bar, replace the 4202 by 4196.
thread=4196
please give me answer of above question
Hi,
What is the above question ?plese help me to get answer for the followings
1)One basic reason for diffrent tilts is, bcoz Electrical tilt is having less backlobe nd sidelobe as compared to mechanical tilt.
so in electrical tilt reduces the interference.2)There is no such standard practise followed…but wat i have seen is that 2 deg of electrical is default.
3)values of tilt can be seen physically….for electrical tilt we had a nobe at the bottom of the antenna….nd mechanical tilt is given at the upper end of the antenna….where a clamp is move to adjaust the tilt.
MKT – 28 Jul 2008
1)
Why do they have provided two options for tilt in antenna, ie
Electrical & Mechanical2)
What will happen if we have different degrees of tilt for mechanical & electrical at an antenna? say 2 degree for mechanical and 4 degree for electrical.
3)
What is the standard practice in industry for tilts (electrical & mechanical) to achieve the objective of
a) Coverage
b) Capacity
c) indoor coverage
4)
How can we check the values if tilt for mechanical and electrical for an antenna?
5)
How does remote electrical tilt work? Any special antenna?
Regards
I wonder if anybody can help with an Electrical down tilt formula I require to adjust the cable lengths on the phasing harnesses as a factor for 2 or 4 stack dipole arrays when the required degrees down tilt is known and the frequency is known.
How does el. tilt works ?
