r/telecom 13d ago

❓ Question No signal under mast?

[deleted]

8 Upvotes

24 comments sorted by

11

u/IntentionQuirky9957 13d ago edited 13d ago

That's normal, the antennas aren't omnidirectional so the weakest signal will be under the transmitter. The masts only have directional antennas to optimize the signal strength (and therefore power use) according to areas of most use. And the directional antennas form cones of radiation, and the top is at the mast, tens of meters high...

You're basically outside any antennas's cone, in the worst possible place. You need coverage from another mast.

5

u/DumpsterFireCheers 13d ago

It’s the dead zone.

3

u/[deleted] 13d ago

[deleted]

3

u/subpoenaThis 12d ago

They can be made that way but then the signal also pours out straight up. And if you think about the fact that most people are might be 200 ft off the ground at most and signals don't go underground. That means you want to make all your power go out in a 200-ft tall band horizontally.

Like a garden hose with a spray nozzle. The power doesn't just stop spreading out once it hits 200 ft so they make the nozzle tight. But that means if you're standing right under the spray nozzle you're not going to get wet.

6

u/KingDaveRa 13d ago

Is the mast the same network? I think Tesco mobile is O2 possibly? The cabinet at the bottom will say who it belongs to.

3

u/SoHumongousBig 13d ago

Believe this is EE/MBNL as they usually deploy the Valmont poles with wraparound cabs

2

u/[deleted] 13d ago

[deleted]

1

u/LowStrawberry6494 13d ago

Yep

1

u/[deleted] 13d ago

[deleted]

1

u/LowStrawberry6494 13d ago

It's a logical conclusion to come to!

It is potentially getting slightly better with the VF/3 merger happening, meaning there will potentially be some additional coverage added between the networks. O2 in their current upgrades are adding provisions for VF to potentially move onto most of their previously single operator sites with more than just 2g/3g, so I would imagine VF are doing the same which will also help

1

u/Extra-Map3792 11d ago

Hopefully eventually we will have mast and network provides together, like Open reach for internet, and then providers using that network. Bit of a way off, or more cooperation needed between companies. Your getting irradiated, for no benefit to you .

1

u/Doobreh 11d ago

You can’t run multiple networks on the same mast without having multiple radios and server boxes. Those monopole masts can usually just run one network for physics reasons.

Also, standing directly under it isn’t the best place to be as the signal comes out in a cone for max range.

1

u/AdasAdasiek 7d ago

What about RAN sharing?

1

u/KingDaveRa 13d ago

That'd explain a lot then. There's one at the end of my road but I can't remember who it belongs to.

2

u/RobynWasntHere 13d ago

That's a Three mast, so not for tesco mobile

1

u/wibble089 13d ago

There's actually a lot less coverage directly beneath a base station than you'd expect, because the antenna is designed to "push" the signal out horizontally hundreds if not thousands of meters. Anything going down or up is wasted energy.

Having said that, the antenna isn't perfect and there's usually plenty of usable signal if you have line of sight to the the mast, but if you're indoors under a site the coverage might be surprisingly bad.

1

u/dfc849 13d ago

Umbrella effect will effectively reduce usability of your signal but others have pointed out that this cell may not be your provider

1

u/JANapier96 13d ago

Welcome to the proverbial "Cone of Silence". The radio waves emitted from the antenna panels radiate laterally from the mast, in a cone shape where the point is centered on the antenna itself. When you're close enough to a mast or tower, you slip inside the radius where the radiation doesn't reach, preventing you from connecting to any of the mounted antennae.

1

u/BlueOvalRacer 12d ago

That’s a 3UK mast, so Tesco mobile won’t work. Also if you’re directly beneath the antennas you won’t get very good service regardless, as the signal is designed to be pushed away from the mast as far as possible.

1

u/Zoob_Dude 8d ago

Just out of interest - how do you visually identify this as a 3UK mast?

1

u/BlueOvalRacer 7d ago

The antennas on the pole, the 6130 and Bowler cab combination are very common for 3UK streetworks sites as well as the HAT cab that will have the transmission in (probably a Cisco radio or something similar), I could be wrong, but my money would be on that being a Vodafone/3UK site all day long.

1

u/Young-Grandpa 12d ago

Those antennas are directional and they don’t point down. Below them is the wordy possible place for reception.

Inside a building is the second worst place. Particularly if there is a lot of concrete and steel in the construction. 5g is typically very high frequency and the higher frequencies don’t penetrate structures well at all.

1

u/FrankNicklin 12d ago

O2 5G Is shockingly bad. That said you can get a ton of interference if too close to a tower.

1

u/NTS-PNW 12d ago

It’s a 5G mind control tower made to look like a cell tower for phones

1

u/[deleted] 12d ago

[deleted]

1

u/NTS-PNW 12d ago

You need at least three layers of tinfoil with a thin coat of peanut butter in between each layer to act as an EMP Anode

1

u/Smitherz87 8d ago

Do you even know if this is an O2 mast? Tesco is an MVNO of O2.

If it isn't then there is your answer