Answer first: mount the included high-gain Yagi high on the rooftop mast, chimney or gable, rotate its narrow beam toward the serving mast until the outside phone reading peaks, keep it at least 10 m vertically above and separated from the indoor whips, run the 10 m outdoor feed through a sealed entry to the BS donor port and the 5 m indoor feed from the MS server port to the splitter chain, plug the Yagi lead into BS and the whips into MS, power the 5V DC adapter after both antennas are connected, read the steady LED, and test data plus 3G calls across the 1000 m² space with up to 100 handsets; the job takes 10 to 15 minutes with no tools on the core install, a long rooftop reach triggers the 20 to 50 m outdoor cable upgrade, an exposed mast justifies the 18KA surge protector, and a strong outside reading funds the 4-way splitter with up to three extra indoor whips across four zones. The CW1000 suits an EE, O2, Vodafone or Three commercial premises spread over multi-floor offices, hotel rooms or warehouse bays that loses 4G data and the 3G fallback indoors; it does not carry 2G voice on Band 8 or Band 3, does not do 5G, and stays rated for 1000 m² rather than a multi-building estate.

What Comes in the CW1000 Full Kit Before You Start

Confirm the box before the first U-bolt or mast clamp. The CW1000 full kit already contains the high-gain Yagi directional aerial, the booster chassis, the 3 dBi indoor whip, the 10 m outdoor low-loss feed, the separate 5 m indoor low-loss feed, the UK 5V DC power adapter and the mounting bracket; the 20/30/40/50 m outdoor cable, the 18KA lightning surge protector and the splitter with extra whips are ordered upgrades rather than standard parts.

Tools you actually need for a commercial mount

No crimping or soldering is required for the standard install: a drill or bracket for the gable or mast clamp, a sealed entry grommet for the outdoor feed, a phone field-strength read-out for aiming the Yagi, and a spanner for the U-bolt. Keep the Yagi elements clear of roof plant, pipework and metal frames, keep both feeds coiled loosely rather than twisted, and survey the outside donor reading before choosing the cable length or splitter layout. The 70/75 dB gain recovers a faint donor that a 60/65 dB stage could not, but that recovery only reaches the four zones if the indoor whips are spread rather than clustered beside the chassis.

Step 1: Mount and Aim the Included Yagi at the Serving Mast

The Yagi is a directional panel: it focuses a narrow beam on one mast and rejects clutter from other directions, which is exactly the weak-signal capture a commercial rooftop needs. Unlike an omni, it must be pointed; aim decides the reading more than height does, and on a multi-floor building the beam path must clear rooftop plant.

Find the mast direction before you fix the clamps

Walk the roof edge or the car park with the phone on the same EE, O2, Vodafone or Three SIM used inside, note which direction the bar count and RSRP peak, and point the Yagi elements' long axis toward that bearing. On a Devon office building, a Yorkshire hotel or a Wales warehouse, customers reported the included Yagi and the high gain took a single bar to five across the whole space; that jump comes from aiming the beam at the serving tower rather than from the chassis alone. Use a compass or the phone's direction finder, and re-check the reading after rotating the panel a few degrees each way before tightening the clamp.

Mount high, clear of rooftop plant, chimneys and steelwork

Fix the Yagi on the rooftop mast, chimney stack, roof ridge or gable wall where its beam path to the mast stays clear of AC units, pipe runs, lift housings and overhead steel; a panel mounted behind a solid gable face or a duct bank sees the structure rather than the tower. Keep the elements horizontal or vertical as the radio standard requires, tighten the U-bolt, and leave enough free play to fine-aim after power-up. The narrow beam tolerates a few degrees of error but not a 30° miss, and metal screens between the panel and the tower cut the donor more than the gain can recover.

10m vertical separation between Yagi and indoor whips

Keep the Yagi at least 10 m vertically above the nearest indoor whip and on the opposite face of the building where possible. This gap, the antenna isolation, stops the whips radiating the amplified field straight back into the Yagi, which would make the chassis feed its own output and oscillate; at 70/75 dB gain, a leaky separation regenerates far faster than on a 60/65 dB unit, because the stage amplifies any self-fed leak by an extra ten decibels. On a tall hotel where 10 m between roof and ground floor is impossible, place the whips on the lower floors away from the roof face, maximise the physical gap, and keep the four antennas off the Yagi's back lobe.

Step 2: Route the 10m Outdoor and 5m Indoor Feeds, Choose a Longer Outdoor Cable

The Yagi connects to the chassis by the included 10 m outdoor low-loss coax, and the whip connects by the separate 5 m indoor feed; keeping the two runs separate avoids a single long shared length and lets each match its own distance. Every metre spends signal, so route the shortest practical path and avoid sharp bends that compress the shield.

Sealed entry and tidy routing for both feeds

Pass the 10 m outdoor coax through a sealed grommet or a small angled drill hole with a drip loop below the entry so rain runs away rather than down the wire. The 5 m indoor feed runs from the chassis MS port to the first whip inside; keep both feeds clear of mains wiring, TV aerial coax and metal ducting, which can inject noise, and avoid tight coils beside the chassis where the bundle distorts the field. Terminate both connectors firmly; a loose BS connection is the most common dark-LED cause on a commercial install.

When the 20/30/40/50m outdoor upgrade applies

Where the Yagi mount sits more than 10 m from the proposed chassis room, order the 20, 30, 40 or 50 m outdoor cable upgrade instead of splicing the standard lead; a spliced joint adds mismatch and water risk, and a longer low-loss run preserves the signal better than a join. One Vodafone customer in Wales took the 50 m roof run to reach the chassis room and reported the signal went solid across the warehouse afterwards. The 5 m indoor feed stays as supplied between chassis and first whip; when you add the second, third and fourth antennas, the extra runs come from the splitter branches, not from extending the BS lead.

Step 3: Chassis Placement and the BS versus MS Ports

The compact chassis sits in a comms cupboard, server room, under-counter space or on a shelf in the covered space, kept ventilated and away from direct heat. The two ports are labelled, and swapping them inverts the loop and causes oscillation, so match lead to port on the first attempt.

Why a port swap loops fastest at 70/75dB gain

If the Yagi feed plugs into MS and the whip into BS, the interior whips radiate straight back into the directional panel, the chassis feeds its own output, and automatic gain control drives the 70/75 dB stage toward oscillation until the LED flickers and the zones drop. The higher gain means a swapped pair feeds back harder than a lower-gain box; the fix is to swap the two leads. Once BS carries the mast donor and MS carries the indoor whips, the two sides face opposite environments and the loop stays open. Keep each whip upright on a shelf or stand, not pressed against the Yagi feed, a steel cabinet or a concrete pillar.

Where the whips radiate best across 1000m²

The 3 dBi whip radiates the amplified field across the open-plan floors, hotel corridors, warehouse bays and reception; place the first whip centrally rather than tucked behind a filing cabinet, where furniture and shelving mask the reach. Coverage is rated to 1000 m² for an office building, hotel, warehouse or business unit, and the 20 dBm field spreads across the zones; a far bay that reads light is the reason to add a second, third or fourth antenna through the splitter rather than moving the whip endlessly.

Step 4: 5V DC Power, Power-On Order and the LEDs

The chassis runs from the included UK adapter converting AC 100-240V to DC 5V, and the order matters: mount and connect both antennas before powering on, so the gain stage does not latch into a self-fed loop the moment it wakes.

Correct power-on sequence and fine-aim after boot

First the Yagi is fixed and aimed and the 10 m feed reaches the BS port; second the 5 m indoor feed connects the MS port to the whip or splitter chain; only then the 5V DC adapter receives mains power. Powering up before the MS side is connected lets the chassis radiate into an open port and can trigger oscillation. Wait ten seconds after power, then fine-rotate the Yagi a few degrees while a helper watches the phone reading at the whips, and lock the clamp at the peak before commissioning the rest of the zones.

Reading the status LEDs on a commercial install

A steady bright LED on the chassis confirms both Band 20 and Band 1 are locked and the gain stage has settled; a flickering or climbing pattern points to oscillation, a port swap or an overloaded donor, while a permanently dark LED with power present means a loose BS lead, a blown adapter fuse or a Yagi aimed at sky rather than a mast. As the outside signal swings with weather and traffic, the LED may dim momentarily as the gain rebalances, which is normal; keep the adapter earthed and add the 18KA surge protector where lightning exposure on the roof mast justifies it.

The 18KA surge protector on the rooftop mast run

For a tall rooftop mast, an exposed gable or a rural warehouse prone to storms, the optional 18KA lightning surge protector sits on the outdoor coax between the Yagi and the chassis, diverting a static or lightning spike away from the indoor electronics. It does not improve signal and is not required on a sheltered mid-wall install, but it protects the long outdoor run and the chassis where the panel stands highest on an exposed commercial roof.

Splitter Expansion: Four Indoor Antennas Across Zones and Floors

The CW1000 page states, verbatim, "Expandable coverage by adding indoor antenna, splitter, cable if the outside signal is strong." That condition matters: a weak donor cannot afford split loss, and only a strong outside reading funds a four-antenna layout.

How the 4-way splitter reaches four zones on 1000m²

When the aimed Yagi reads strong, fit a 4-way splitter on the MS side after the chassis, run extra indoor cables to a second whip in the reception or open-plan area, a third on the next floor or corridor, and a fourth in the warehouse bay or hotel wing, and balance the four branches. Each division spends radiated power, but the 20 dBm output and the 70/75 dB gain have the headroom to feed four antennas across the space; the second, third and fourth whips only reach their zones while the donor stays strong. Keep every whip separated from the Yagi and from each other so none feeds the next, and measure each zone before committing the extra cables.

When not to split to four

A donor between -100 and -112 dBm already strains a single whip even with the higher gain, and dividing the field four ways produces four lighter readings rather than four solid ones; in that case improve the Yagi aim first, check the roof position, or step to a dedicated multi-access point indoor system rather than dividing a weak signal four times. Splitting is an expansion of a strong baseline, never a rescue for a faint donor.

The 100-User Test: 4G Data and 3G Calls Across 1000m²

The CW1000 supports up to 100 simultaneous handsets across 1000 m²; the acceptance test checks that the open-plan floors, hotel corridors, warehouse bays, reception and meeting rooms all hold a 4G session and a 3G call at once rather than one phone beside the whip.

How to stage the acceptance test

Place mixed handsets on EE, O2, Vodafone, Three, giffgaff, Tesco, Sky, Smarty and Lebara SIMs across the zones, floors, desks, reception and warehouse; start a data session on one group and a voice call on another, hold both for a minute, then walk the reading around the space. Record the bar count before fitting, after fitting near the whip, and after fitting at the far bay or corridor; a Devon office that went from one bar to five on EE across all 1000 m², a Yorkshire hotel whose guest calls stopped dropping on every floor, and a Cornwall office whose video calls held for 100 users match the reported pattern. With 100 users in an office, hotel or warehouse, stagger sessions so the gain stage balances the load rather than piling every handset on one whip.

Expected coverage by commercial space

CW1000 Against the Range: Ten Decibels More Gain, Four Antennas

The Boost4U range splits by tuned band, gain, output, area and users, and choosing the wrong model leaves either a service gap or unused budget.

The CW500 repeats the same Band 20+1 services at a 20 dBm output but on 60/65 dB gain for 500 m² and 50 users with three indoor antennas; the CW1000 keeps the bands and output but adds ten decibels of gain, about ten times the faint-donor recovery, spreads over 1000 m² for 100 handsets, and supports four antennas through the 4-way splitter. The CG1000 keeps O2/Vodafone 4G plus a 2G circuit call but leaves the all-network 3G layer absent; the CD1000 keeps 4G families but carries neither 3G fallback nor a dedicated call band. Pick CW1000 for 3G redundancy across EE, O2, Vodafone and Three across a multi-floor commercial premises.

Troubleshooting: Oscillation, No Signal and the LED Read-Out

Oscillation: looped field and flickering LED

The symptom is a flickering or climbing LED, a reading strong beside the whip but a step away falling, and dropped sessions despite power. Causes are a BS/MS port swap, a whip too close to the Yagi feed, a fourth whip placed in the Yagi's back lobe, or insufficient 10 m isolation letting the high-gain chassis feed itself. Fix the ports, increase the separation, space the four whips around the zones, and let gain settle rather than driving into the loop.

No signal at all: dark LED, loose leads, or Yagi in the sky

A dark LED with the adapter live points to a loose BS connector, a blown adapter fuse, or the Yagi aimed at sky or a roof unit rather than the serving mast. Reseat both connectors, try another socket, rotate the panel a few degrees while a helper watches the phone, and verify a reading exists outside first; if the phone reads zero on the roof, the booster cannot recover a block absent from the tower.

Weak far bay, dead valley and mains noise

A lighter bay comes from the whips clustered on one floor; spread them central across zones, or split to a second, third or fourth antenna only on a strong donor. A dead valley below the decode floor needs a better mast bearing or a fixed multi-array system rather than another whip indoors. Hum following the mains points to the outdoor coax running beside the power loom; separate the feed and re-check.

Article Keywords

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