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5 GHz Compatibility Check in Katy, TX 77494
Before you buy a mesh system, replace a router or blame the internet company, it is worth knowing exactly which of your devices can use 5 GHz, which sub-bands each one accepts, and which of them are quietly holding the whole network to a slower standard. That inventory is the check. EVOTECH IT LLC has been a licensed, insured low-voltage contractor in west Katy for 20+ years, rated 5.0 stars, and the on-site estimate is free.
“Is it 5 GHz compatible?” is four questions wearing one coat
A box that says dual-band tells you the radio can tune somewhere in the 5 GHz range. It does not tell you which part of that range, at what channel width, under which security mode, or at what generation of the standard — and every one of those four can be the thing stopping a device from joining your network.
So a compatibility check is not a yes/no answer read off a sticker. It is a survey. We walk the house with a spectrum and client-capability tool, associate to your network, and build a row per device: the radio generation it negotiates, the sub-bands it will accept, the widest channel it will use, the security suites it advertises, and the signal it actually holds where it lives.
Most people book this for one of three reasons. They are about to spend real money on a Wi-Fi upgrade and want to know whether the hardware they own can use it. They have one stubborn device that will not join and want to know whether it ever could. Or they have a house that is fast in some rooms and useless in others and want the cause named before anyone sells them nodes.
5 GHz is four separate blocks of spectrum, and your devices do not treat them equally
In the United States the 5 GHz band is carved into blocks with different rules. Routers hop between them freely. Client devices, especially cheap ones, often do not.
| Block | Channels | Radar rules apply | Typical client support |
|---|---|---|---|
| UNII-1 | 36–48 | No | Effectively universal — if a device does 5 GHz at all, it does these |
| UNII-2A | 52–64 | Yes (DFS) | Most phones and laptops; many streamers, printers and cameras skip it |
| UNII-2C | 100–144 | Yes (DFS) | Patchy even on good hardware; some routers omit the middle of the range |
| UNII-3 | 149–165 | No | Effectively universal, and usually the least congested non-radar space |
This is the single most common cause of the complaint we hear in 77494: the network disappeared from that one device. Nothing is broken. The access point moved to a channel that device was never built to scan.
DFS: half the band your router wants to use, and the reason it keeps moving
Dynamic Frequency Selection is the rule that says Wi-Fi is a guest in spectrum that belongs to radar. An access point using a DFS channel must listen before it transmits, and if the radio believes it has detected a radar pattern it has to vacate that channel and stay off it for thirty minutes. In a metro the size of Houston — weather radar, airport radar, aviation traffic overhead — that does happen, and it is not a fault.
The user-visible symptom is strange enough that it rarely gets diagnosed correctly: the Wi-Fi drops for everyone at once for ten or twenty seconds, at unpredictable intervals, sometimes days apart. Or a set of devices vanishes permanently while phones and laptops stay online, because those devices never followed the router onto the DFS channel in the first place.
Part of the check is deciding, for your house, whether DFS is worth having on. In a dense neighbourhood it buys you clean spectrum that no neighbour is using. In a house full of budget IoT hardware it buys you a support problem. We test rather than guess — we park the radio on a DFS channel and see who follows.
Channel width, 160 MHz claims, and the client that sets the pace
Width is the other half of the throughput story. A 5 GHz radio can run 20, 40, 80 or 160 MHz wide. Wider is faster in a clean room and worse at range, because the same transmit power is spread across more spectrum and the noise floor rises with it. A device three rooms away on 80 MHz will often perform worse than the same device on 40.
The 160 MHz figure printed on router boxes deserves particular scrutiny here. A contiguous 160 MHz channel in the US has to sit across the radar-governed part of the band. So the headline number on the box quietly depends on DFS being enabled and on the client supporting it. We check whether your devices can actually negotiate it before that number influences a purchase.
We also record the generation each client negotiates — 802.11n, ac, ax — because airtime is shared. One old device holding a slow rate consumes disproportionate airtime and drags the average down for everything else on that radio. Knowing which device that is turns a vague slowness complaint into a specific, cheap decision.
WPA3, protected management frames, and the devices that stop connecting after a router swap
Security mode breaks more 5 GHz connections than radio capability does, and it does so silently. WPA3-Personal requires protected management frames. Plenty of otherwise healthy hardware — older streaming boxes, network printers, commercial AV gear, a surprising number of smart appliances — will not associate when that requirement is enforced.
Mixed WPA2/WPA3 transition mode is supposed to solve this, and mostly does, but some clients handle the mixed beacon badly and fail intermittently rather than cleanly. That intermittence is why the setting almost never gets blamed.
A pattern worth knowing: a device that worked for two years and stopped the week a new router arrived is far more likely to be a security-mode casualty than a failed radio. We check that before anybody buys a replacement.
We document what each client advertises, then recommend the least restrictive setting that still protects the network — usually by separating the legacy devices rather than weakening the whole thing.
What a west Katy house physically does to a 5 GHz signal
77494 is dominated by two-storey brick homes on the larger side of suburban — Cinco Ranch, Seven Meadows, Firethorne, Grand Lakes — and the construction fights this band in specific, predictable ways.
- Radiant barrier decking and foil-faced insulation. The foil layer that keeps Katy attics survivable in August is also an effective reflector. Signal between floors often travels through the stairwell opening rather than through the ceiling.
- Tile, stone and the kitchen island. Stone and tile-over-cement-board attenuate hard. A router sitting in the kitchen frequently serves the front of the house well and the back of it poorly.
- The structured panel in the wrong place. Builders put the media panel where the cable entry was convenient — a laundry alcove or the garage wall. In a 3,500 square foot plan that is rarely the centre of the coverage problem.
- Neighbour density. On a standard Cinco Ranch lot we routinely see a dozen or more 2.4 GHz networks overlapping. 5 GHz is quieter, which is exactly why a device that cannot use it suffers most.
- Low-E glass to the patio. The coating that keeps the sun out also blocks the outdoor camera or the pool controller on the far side of it.
What is in your hand when we leave
The check produces a document, not an opinion. It lists:
- Every associated device, named, with its negotiated generation, band capability and DFS behaviour
- Measured signal and noise at the locations that matter to you — the office, the upstairs game room, the patio
- A channel and width plan for your specific neighbour environment, on both bands
- A short, blunt list: which devices should stay on 2.4 GHz permanently, which are worth replacing, and which are fine
- If new hardware is genuinely warranted, what it has to support — stated as requirements, not brand names
Often the honest outcome is that no purchase is needed: a band plan, a fixed channel and one relocated access point solve it. We would rather tell you that than sell you equipment you did not need.
What moves the number on a compatibility check
The visit is free and the quote is itemised; none of it gets priced over the phone. What changes it:
- How many devices. A twelve-device house and a fifty-device house are different days of work.
- Square footage and storeys. Measurements are taken per location, and a two-storey plan with a casita has more of them.
- Whether we test DFS behaviour. Parking the radio and watching who follows takes time, and it is optional.
- Existing documentation. If nobody knows what is in the structured panel, tracing it is part of the job.
- Whether you want remediation on the same visit — re-channelling, splitting SSIDs, relocating an access point — or the report alone.
Related services
Frequently asked questions
My laptop shows a full-strength 5 GHz connection but downloads slower than on 2.4 GHz. Is that even possible?
Yes, and it is common. The bars indicate received signal, not signal-to-noise ratio or negotiated rate. At range a 5 GHz link will drop to a low modulation rate while still showing strong, and an 80 MHz channel makes that worse rather than better. Part of the check is recording the negotiated rate where you actually use the device.
Do I need to replace my router, or my devices?
That is precisely the question the check exists to answer, and we do not have an answer before doing it. In 77494 the most common finding is neither — a fixed channel, the right width and one access point moved out of a closet resolves it. When hardware genuinely is the limit, we say which device and why, in writing.
What is DFS, in one paragraph, for a homeowner?
Certain 5 GHz channels are shared with radar systems. A router using them must monitor for radar and immediately leave the channel if it thinks it hears any, staying off it for half an hour. That gives you cleaner spectrum in a crowded neighbourhood, at the cost of occasional brief drops and of leaving behind any device that cannot scan those channels.
Is Wi-Fi 6E or Wi-Fi 7 worth it for a Katy house this size?
Only if you own clients that can use 6 GHz, and today most households own one or two at most. The 6 GHz band is genuinely clean and genuinely short-range, so it rewards a wired access point in the right room and punishes a single router at one end of a long plan. We will tell you honestly whether your device list justifies it yet.
Can you do this without me handing over my Wi-Fi password?
Some of the survey — spectrum, neighbour occupancy, interference — needs no credentials at all. The client inventory does require association or access to the router’s client list, and you are welcome to type the password yourself and change it afterwards. We do not retain network credentials.
Several devices dropped off the night a new router was installed. Where do we start?
With the security mode and the channel, before anything else. A router swap changes both, and the two together account for most sudden multi-device disappearances. If the devices concerned are smart plugs, cameras or thermostats, the cause is usually a band and onboarding problem rather than a 5 GHz capability one — that is the troubleshooting path covered on our Cypress smart-device page.
Will adding mesh nodes fix a two-storey coverage problem?
Sometimes, and less often than advertised. A node with only a wireless link back to the router spends half its airtime relaying, so a badly placed node can measurably reduce throughput. In houses of this size the reliable fix is a wired run to a properly placed access point, which is why a compatibility check and a cabling conversation usually happen together.
Book a free 5 GHz compatibility check in Katy 77494
Tell us the rooms that misbehave and roughly how many connected devices live in the house. We bring the tools, build the inventory and leave you the plan. Call (832) 359-2425 or use /contact/.
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