CVDW Band 3 + 1 Vehicle Booster Explained: How EE Voice, 1800MHz 4G and 2100MHz 3G Work in Cars, Vans, HGVs and Caravans UK
The Boost4U CVDW is the in-vehicle dual-band booster tuned to Band 3 at 1800 MHz and Band 1 at 2100 MHz, the vehicle equivalent of the home DW Band 3+1 series. On Band 3 the chassis amplifies the EE-family voice call and 4G LTE data layer for EE, BT Mobile, ASDA Mobile and Virgin Mobile handsets; on Band 1 it amplifies the 3G UMTS data and voice layer that reaches EE, O2, Vodafone and Three and their hosted MVNOs inside cars, SUVs, vans, HGVs, motorhomes, campervans and caravans. This deep dive explains what each frequency block carries on UK roads and motorways, how the ≥45 dB uplink and ≥50 dB downlink gain with a ≥10 dBm output and the magnetic 5 dBi omni aerial fill a 100 m² cabin for up to 15 users, which driver SIM rides which host network, how the booster copes with handover between roadside masts, what happens outside the 3G footprint, which bands the chassis deliberately does not carry, and how the CVDW compares against the other five vehicle dual-band combos and against a fixed home booster.
Answer first: two tuned blocks, two different jobs on the same roof aerial
On Band 3 (1710–1785 MHz uplink, 1805–1880 MHz downlink) the CVDW amplifies EE-hosted voice calls and 1800 MHz 4G LTE for EE, BT Mobile, ASDA Mobile, Virgin Mobile, Orange, T-Mobile and The People's Operator handsets; on Band 1 (1930–1990 MHz uplink, 2110–2180 MHz downlink) it amplifies 3G UMTS data and voice for EE, O2, Vodafone and Three and their hosted MVNOs. The ≥45/50 dB vehicle gain lifts the two donor blocks picked up by the magnetic omni, and the ≥10 dBm output spreads that recovered field through the cabin whip for up to 15 users across a 100 m² interior. Where the building or vehicle sits beyond a local 3G footprint, EE-family handsets keep circuit voice on Band 3 while non-EE SIMs rely on the host's own fallback, which this chassis cannot supply. The chassis does not tune Band 20 800 MHz rural 4G, Band 8 900 MHz legacy voice or any 5G NR layer, and it cannot help where the outside phone reads zero bars.
Band 3 at 1800 MHz: the EE-Family Voice Call and 4G Layer Across UK Roads
Band 3 occupies 1710–1785 MHz on the uplink, where handsets transmit, and 1805–1880 MHz on the downlink, where the mast transmits. In the UK this block carries the EE family's voice calls, texts and 4G LTE data, and it is the layer that keeps an EE, BT, ASDA, Virgin, Orange, T-Mobile or The People's Operator handset calling and browsing inside a car body, van metal, HGV cab or motorhome shell where the handset alone drops behind bonnet steel, roof rack, roof box, spoiler, bulkhead or party-style body panel. The CVDW roof omni collects the 1800 MHz donor, the chassis amplifies the block, and the cabin whip re-radiates it to the driver and passengers.
Why Band 3 carries both voice and 4G for the EE family
EE allocates its 1800 MHz spectrum across both circuit voice work and 4G packet data; a CVDW handset on an EE-family SIM therefore keeps a normal circuit voice call and a 4G data session on the same band stages, rather than hopping to a separate voice layer the repeater does not carry. For an EE business driver who relies on reliable calls, texts, messaging apps and light browsing through the cab, this Band 3 layer is the primary service: incoming and outgoing calls, messaging and navigation hold indoors through the dash or parcel-shelf whip after the 50 dB downlink gain amplifies the block and the 3 dBi interior whip re-radiates it through the cabin.
| Brand | Host | Band 3 service on the vehicle |
|---|---|---|
| EE | EE | Voice calls, texts and 1800 MHz 4G LTE data |
| BT Mobile | EE | Voice calls, texts and 1800 MHz 4G data |
| ASDA Mobile | EE | Voice calls, texts and 1800 MHz 4G data |
| Virgin Mobile | EE | Voice calls, texts and 1800 MHz 4G data |
| Orange, T-Mobile, The People's Operator | EE legacy family | Band 3 voice layer on legacy plans where retained |
The CVDW amplifies whatever band carrier the host sends; one serving carrier is tuned at a time, so a driver with an EE main account and an O2 or Three secondary SIM should confirm both hosts' bars are visible through the same omni position. In a shared family car or crew van, the EE-family members hold calls on Band 3 while everyone else falls back to Band 1 3G as the common cross-network layer.
Band 1 at 2100 MHz: the 3G UMTS Data and Voice Fallback for All Four MNOs
Band 1 pairs 1930–1990 MHz uplink with 2110–2180 MHz downlink. This is the 3G UMTS layer, and on the CVDW it carries data and voice for all four MNOs: EE, O2, Vodafone and Three, plus the MVNOs hosted on those networks. Its job in the vehicle is the shared reserve: an O2, Vodafone or Three handset that cannot hold a newer 4G bearer can still call, text, send a location fix or hold a low-bandwidth data session over the amplified 2100 MHz block, and an EE handset without a local 4G donor can use the same 3G reserve as a common cross-network layer.
How 3G keeps the call alive off the 4G footprint
3G UMTS supports circuit voice and packet data; an O2 or Vodafone handset on a weak rural A-road, a Three phone in a delivery yard, or an EE handset past a 4G cell edge can still call, text, open a maps session or hold a low-bandwidth data session over the amplified 2100 MHz block. On a mixed-carrier cab, staff on an O2 or Vodafone SIM, a clinic booking system tethered to an O2 handset, or a business laptop tied to a Three mobile hotspot depend on this Band 1 redundancy that a single-band Band 3 repeater cannot provide. The chassis tunes both bands together, so the main whip feeds both donors and the branch whips re-radiate the combined field over seats and zones.
2100 MHz propagation inside a moving metal cabin
The 2100 MHz band travels shorter distances and loses more energy through thick truck bodywork, concrete, party wall masonry, bar chrome, kitchen stainless steel and clinic cabinets than a lower rural band would, which is why the interior whip sits central to the main seats rather than at the far edge of the vehicle. The ≥50 dB downlink gain recovers the faint handset-side signal back toward the mast, and the ≥10 dBm output keeps the cabin field audible across the main seats; an upper or rear cargo bay that reads light on Band 1 is the reason to move that zone's whip forward or add an appropriate branch whip, not to shift the donor mast bearing.
How ≥45/50 dB Gain and ≥10 dBm Output Cover a 100 m² Cabin for 15 Users
The CVDW's radio numbers are sized for a car, van, HGV cab, SUV, motorhome or caravan interior rather than a house or office: gain, output power, noise figure, magnetic omni aerial and the 3 dBi cabin whip are matched to a compact moving cabin field rather than a fixed-building footprint.
≥45/50 dB: vehicle-grade gain matched to the car body
Gain is the chassis amplification of the faint donor signal: ≥45 dB on the uplink from handset to mast, ≥50 dB on the downlink from mast to handset. This vehicle-stage recovery matches the metal cabin shielding a driver meets on a motorway cutting, a delivery yard between steel sheds, a hospital corridor behind parked vehicles or an estate road behind high hedges; the 45/50 dB figures recover a one- or two-bar donor behind bodywork into a usable reading without pushing the stage into feedback. The ≤5 dB noise figure keeps the amplified field clear of hiss and noise, which matters for voice calls and weak data sessions.
≥10 dBm output and the magnetic omni 5 dBi aerial
The ≥10 dBm figure is the field the interior whip radiates into the cabin: balanced voice and data across driver, passengers and hotspot devices through the single whip, or through a split second whip in a larger motorhome or crew van. The magnetic omni 5 dBi donor aerial concentrates the roof pick-up toward the strongest combined Band 3 and Band 1 bearing, and the 3 dBi interior whip spreads the recovered field through the main seats; the 5 m low-loss coax keeps donor loss between roof and chassis low enough for the vehicle field to hold.
Radio summary for the driver and fleet buyer
| Parameter | CVDW figure | What it delivers on the road |
|---|---|---|
| Uplink gain | ≥45 dB | Weak handset call and data recovered back to the roadside mast |
| Downlink gain | ≥50 dB | Donor amplified to the cabin whip across seats and rear bench |
| Output power | ≥10 dBm | Balanced field for up to 15 handsets through the whip or split whips |
| Noise figure | ≤5 dB | Keeps the amplified field clear of hiss and noise |
| Users / space | 15 handsets, 100 m² cabin | Car, SUV, van, HGV cab, motorhome lounge and caravan interior |
| Outdoor aerial | Magnetic omni 5 dBi | Roof donor pick-up, no drilling, adhesive pad or screw mount for non-steel panels |
| Indoor antenna | 3 dBi whip, one in the kit | Main cabin field; extra whips join a splitter for rear zones on a strong donor |
Handover: How the Booster Copes Between Roadside Masts
A moving vehicle crosses cell boundaries constantly: motorway junctions, A-road villages, delivery roundabouts and motorway service areas each hand the call from one mast to the next. The booster amplifies the donor the omni currently sees; it does not choose the mast, hold the handover or extend the network itself. As the phone switches cells, the chassis automatic gain control rebalances the field to the new donor, and the cabin whip keeps the handsets fed through the short handover gap.
Cell switching on motorways and A-roads
On a motorway at 70 mph the handset may cross a new cell every few kilometres; on a rural A-road the gaps between masts are longer and the donor weaker. The omni receives the nearest combined Band 3 and Band 1 bearing, the chassis amplifies it, and the gain control settles over a minute or two after each major handover. A brief drop while the phone locks onto the next mast is normal; a call that dies in every cutting, tunnel or underpass points to a donor gap the booster cannot bridge.
What the booster cannot fix in a coverage gap
Where the outside phone reads zero bars on both bands, the chassis has no donor to amplify; the call drops or the data session stalls exactly as it would without the kit. Deep cuttings, tunnels, underpasses, isolated valleys and new housing estates between masts are coverage gaps for the host network, not a repeater fault. The second whip, splitter and extension coax do not add range; they only redistribute a recovered field inside the vehicle on a strong donor.
Why antenna spacing still matters at road speed
At motorway speed the roof omni and cabin whip must still stay separated so the amplified field does not feed straight back into the donor aerial. A whip on the dash directly under the roof lead, or a chassis with the two ports reversed, can latch oscillation that appears as a flickering LED, a sudden call collapse or a feedback whistle through the cabin speaker; the same spacing rules that apply when parked apply at 70 mph, because the feedback loop does not switch off with speed.
MVNO Host Map for PCO Drivers, Van Fleet and Family SIMs
Budget and family SIMs do not all run on their own masts; most lease capacity from one of the four MNOs, and the host determines which band the SIM receives through the CVDW. Only EE-hosted brands receive the Band 3 1800 MHz call circuit indoors; every other host depends on Band 1 3G through this chassis.
| Host network | Band service on CVDW | Hosted brands to check in the vehicle |
|---|---|---|
| EE | Band 3 voice + 1800 MHz 4G, plus Band 1 3G reserve | EE, BT Mobile, ASDA Mobile, Virgin Mobile, Orange, T-Mobile, The People's Operator |
| O2 | Band 1 3G data and voice | giffgaff, Tesco Mobile, Sky Mobile, Lycamobile, Plusnet |
| Three | Band 1 3G data and voice | Smarty, iD Mobile |
| Vodafone | Band 1 3G data and voice | Lebara, Talkmobile |
| Leased fallback | Depends on the plan's current host | FreedomPop, TalkTalk and similar leased brands; confirm the host before relying on the band |
For a PCO driver, taxi operator or van fleet manager, the practical check is to read the SIM packaging or account settings for the host network, then test that host's 3G reading outside the vehicle before the journey. A giffgaff driver on O2, a Smarty driver on Three and a Lebara driver on Vodafone all rely on Band 1 indoors; an EE business account holder keeps the Band 3 call circuit, while the O2, Three or Vodafone staff and visitor SIMs have no spare Band 3 circuit channel on this model.
3G Fallback, VoLTE and What the Phone Actually Switches To
When the newer 4G bearer drops along a rural route, the phone steps to the available 3G circuit rather than disconnecting; on the CVDW that reserve is Band 1 2100 MHz for every host, with the EE family also holding Band 3 circuit voice where the 1800 MHz donor survives. Understanding this switch prevents a driver from blaming the booster for a host-side fallback.
When 4G drops, the phone steps to Band 1 rather than disconnecting
An O2, Vodafone or Three handset past a 4G cell edge falls to the 3G UMTS block for voice and low-bandwidth data; an EE-family handset keeps the Band 3 circuit call where the 1800 MHz layer survives, and uses Band 1 as the common reserve where it does not. The chassis tunes both blocks together, so the main whip feeds both donors and any branch whip re-radiates the combined field over the seats.
VoLTE where the handset and host support it
Voice over LTE carries calls as data packets over the 4G bearer where the handset, SIM plan and host support it; the CVDW amplifies the Band 3 4G layer that VoLTE rides on for EE-family handsets. Where VoLTE is unavailable or switched off, the handset falls back to circuit voice on the tuned band; non-EE hosts on this chassis have no Band 3 circuit circuit to fall onto and rely on the Band 1 3G voice channel supplied by the host.
Why this vehicle kit cannot rescue a 2G-only handset or a 5G contract need
The chassis carries no Band 8 900 MHz layer, so a legacy handset expecting a 2G circuit call cannot be rescued here; it carries no 5G NR of any band, so a contract that advertises 5G speed remains on the host's 4G or 3G layer inside the vehicle. A driver choosing between boosters should match the chassis bands to the SIM hosts actually used on the route rather than buying a chassis that carries neither the host's voice layer nor its data band.
CVDW Against the Vehicle Range: Band Combos at a Glance
The CVDW is the only vehicle dual-band in the Boost4U range that pairs the EE-family voice and 1800 MHz 4G layer with the all-network 2100 MHz 3G layer. The five other vehicle combos trade those services for different bands and hosts:
| Model | Bands | Frequencies | In-vehicle service and gap |
|---|---|---|---|
| CVDW | Band 3 + Band 1 | 1800 + 2100 MHz | EE, BT, ASDA, Virgin voice calls and 1800 MHz 4G LTE, plus 3G UMTS data and voice on EE, O2, Vodafone and Three across all four MNOs |
| CVCW | Band 20 + Band 1 | 800 + 2100 MHz | O2 and Vodafone 4G plus all-network 3G; no EE voice call circuit and no EE 1800 MHz 4G layer |
| CVCD | Band 20 + Band 3 | 800 + 1800 MHz | EE, O2 and Vodafone 4G; no 3G layer and no EE voice calls |
| CVGW | Band 8 + Band 1 | 900 + 2100 MHz | General 2G voice plus 3G; no EE 1800 MHz 4G layer |
| CVGD | Band 8 + Band 3 | 900 + 1800 MHz | General voice plus EE 4G; no 3G layer |
| CVCG | Band 20 + Band 8 | 800 + 900 MHz | O2 and Vodafone 4G plus 2G voice; no 3G layer and no EE service |
An EE-family driver who also carries an O2, Vodafone or Three spare phone for data needs the CVDW; a driver who only needs O2 or Vodafone 4G data can compare the CVCW, a fleet that only browses EE, O2 and Vodafone 4G can compare the CVCD, and a driver who keeps a legacy 2G voice contract can compare the CVGW or CVCG Band 8 models. Match the band table to the SIM hosts on the actual route rather than the advertised general description on the box.
Vehicle booster versus home booster: which class fits
The home DW100 and DW200 fixed-building units are a different product class: they run from a mains adapter with a wall-mounted outdoor aerial, cover a larger fixed room, flat, office or building, and stay installed on one property. The CVDW is built for transfer between vehicles in under fifteen minutes: magnetic roof mount, 5V cigarette-lighter adapter, 5 m lead, cabin field for up to 15 users and an optional 240V AC adapter for static caravan weeks. A home owner who wants a fixed flat install should compare the DW range; a commuter, HGV driver, taxi operator, van tradesperson, SUV traveller or motorhome touring party needs the vehicle chassis.
Honest Limits: Rural 4G, Band 8, 5G, Outside Signal and the 5 m Lead
The CVDW does exactly what its two tuned bands allow; the gaps below are honest engineering boundaries rather than faults, and matching the chassis to the route prevents an expensive surprise on the first long journey.
No Band 20 800 MHz rural 4G
Band 20 at 800 MHz is the long-distance rural 4G layer used mainly by O2 and Vodafone in villages, remote farmsteads and open moorland. The CVDW chassis skips that block entirely, so a donor reading that lives only on 800 MHz cannot be amplified; a rural driver on an O2 or Vodafone 4G contract should compare the CVCW or CVCG Band 20 combos before ordering. The 1800 MHz Band 3 layer reaches town and road-edge EE-family coverage but does not substitute for the long-distance 800 MHz layer in open country.
No Band 8 900 MHz legacy voice
Band 8 at 900 MHz carries the older 2G circuit voice network in pockets of the UK; the CVDW carries no Band 8, so a legacy handset expecting that voice layer has no circuit channel here. A driver who needs general 2G voice plus a data band should compare the CVGW Band 8+1 or CVGD Band 8+3 vehicle models rather than expecting the Band 3 chassis to carry the legacy call layer.
No 5G layer of any band
No current indoor or vehicle repeater in this family supports 5G NR; the CVDW amplifies the EE-family 4G layer on Band 3 and the 3G layer on Band 1, and a 5G contract inside the vehicle stays on whichever 4G or 3G bearer the host hands the phone. Buyers looking for 5G speed should check host 5G coverage outdoors and consider a native 5G network solution rather than this repeater class.
It needs outside signal, and it cannot create a donor
The repeater amplifies an existing weak donor: the outside phone must read at least one bar on the tuned bands at the roof position before the chassis can help. In a zero-bar dead zone, a tunnel, a deep cutting or a basement-level parking area, the booster has nothing to amplify and cannot manufacture a signal from the handset's own transmitter. A zero-bar reading inside the cabin with no donor outside means the vehicle should move to a stronger bearing before the install is judged a fault.
The 5 m fixed lead and large HGVs
The kit supplies a fixed 5 m low-loss coax; that reaches the cab in a saloon, SUV, van and motorhome, but a long-wheelbase HGV, horsebox compartment or separate trailer caravan may need a matched seller-supplied extension coax. A poorly spliced extension adds loss and a water-entry point, so use matched connectors and seal any external joint; a second interior whip in a rear sleeping cabin follows the same strong-donor rule as a home split install.
Regulatory marks: Ofcom licence-exempt, UKCA, CE and RoHS
The CVDW sits in the Ofcom licence-exempt mobile repeater class for indoor and vehicle use, aligned with the Ofcom Technical Standard for Mobile Repeaters, and carries UKCA, CE and RoHS conformity marks. The chassis must not be re-tuned, opened or paired with a different aerial; installation spacing between donor and server stages keeps the amplified cabin field from feeding back onto the macro masts. The kit carries a 365-day money-back guarantee and lifetime technical support.
The Bottom Line
The aerial read: the CVDW fills a specific gap in the vehicle range — it is the magnetic, cigarette-lighter, transferable chassis for an EE-family driver who needs the 1800 MHz call and 4G layer kept alive through a metal cabin, with a 2100 MHz 3G reserve for O2, Vodafone and Three passengers on the same roof omni. The ≥45/50 dB gain and ≥10 dBm output are sized for a 100 m² cabin and 15 handsets, not a house or office; Band 3 belongs to the EE host map, Band 1 belongs to all four hosts, and the chassis leaves rural 800 MHz 4G, Band 8 voice and every 5G NR layer to the other combos. Match the bands to the SIM hosts on the route, read the outside donor before fitting, and keep the donor and server aerials separated on every transfer between vehicles.
Frequently Asked Questions
Which two frequency blocks form the CVDW vehicle system, and what service does each carry on UK roads?
Band 3 at 1710–1785 MHz uplink and 1805–1880 MHz downlink carries the EE-family voice calls and 1800 MHz 4G LTE for EE, BT Mobile, ASDA Mobile and Virgin Mobile handsets; Band 1 at 1930–1990 MHz uplink and 2110–2180 MHz downlink carries 3G UMTS data and voice for EE, O2, Vodafone and Three and their hosted MVNOs. The roof omni collects both donors, the ≥45/50 dB chassis amplifies them, and the cabin whip spreads the combined field to driver and passengers.
Why does the 1800 MHz layer keep EE-family calls and 4G sessions alive through a metal car cabin that blocks the handset alone?
A vehicle roof, bonnet, bulkhead, roof box and spoiler shield the small handset radio; the magnetic roof omni sits above that shielding and reads a stronger donor, the ≥50 dB downlink gain lifts the 1800 MHz block past the bodywork loss, and the 3 dBi whip re-radiates the recovered signal into the cab. EE allocates 1800 MHz across both circuit voice and 4G packet data, so the same Band 3 stages carry the call and the data session rather than a separate voice layer the chassis does not tune.
Which 3G reserve keeps an O2, Vodafone or Three phone calling and browsing when the newer packet data layer fades on a rural A-road, and which handsets share that reserve?
Band 1 2100 MHz carries 3G UMTS circuit voice and packet data for all four hosts, so an O2, Vodafone or Three handset off a 4G cell edge can still call, text, send a location fix or hold a low-bandwidth maps and browser session through the amplified block. A giffgaff, Tesco or Sky handset on O2, a Smarty or iD handset on Three, and a Lebara or Talkmobile handset on Vodafone all depend on this Band 1 reserve indoors; the chassis does not give them a Band 3 1800 MHz circuit channel.
How do the 45/50 dB vehicle gain and 10 dBm output compare with a home booster, and what do they deliver inside a 100 m² cabin?
The ≥45 dB uplink and ≥50 dB downlink gain are sized to recover a one- or two-bar donor behind vehicle metal, truck bodywork or roadside shielding, while the ≤5 dB noise figure keeps the voice path clear; the ≥10 dBm output feeds the cabin whip for up to 15 handsets across a 100 m² car, van, HGV cab, SUV, motorhome or caravan interior. These are cabin figures, not room or office figures: the fixed home DW units use mains power, wall-mounted outdoor aerials and larger fixed-building footprints, whereas the CVDW transfers between vehicles on a 5V cigarette-lighter adapter.
Which driver SIM brands ride the EE host and keep the 1800 MHz call circuit, and which O2, Three or Vodafone hosted brands rely on Band 1 3G in the vehicle?
EE, BT Mobile, ASDA Mobile, Virgin Mobile, Orange, T-Mobile and The People's Operator sit on the EE host and keep the Band 3 voice and 1800 MHz 4G layer; giffgaff, Tesco Mobile, Sky Mobile, Lycamobile and Plusnet sit on O2, Smarty and iD Mobile sit on Three, and Lebara and Talkmobile sit on Vodafone. FreedomPop, TalkTalk and similar leased brands depend on the plan's current fallback host. The O2, Three and Vodafone hosted brands have no Band 3 call circuit on this chassis and use Band 1 3G indoors.
Outside the local 3G cell along a rural route, which EE-leased handsets keep placing calls, and which non-EE driver SIM loses its spare circuit channel?
EE, BT, ASDA and Virgin handsets keep the ordinary circuit voice call on the tuned 1800 MHz Band 3 block even where the surrounding district has no 3G cell, because that circuit voice rides the same Band 3 layer the chassis amplifies. An O2, Vodafone or Three driver or passenger loses its spare circuit channel on this model, since Band 1 is the only voice block those hosts receive here; the handset then falls back on the host's own network reserve, which the repeater cannot supply.
With VoLTE disabled on an EE-family handset, which 1800 MHz circuit block keeps the voice call between cabin whip and roof omni, and which other hosts have no matching block indoors?
With VoLTE switched off, the EE-family call rides the Band 3 1800 MHz circuit voice block between whip and roof omni; the chassis amplifies that same block for the conversation. Non-EE hosts do not share this Band 3 circuit channel on the CVDW: an O2, Vodafone or Three handset must use its Band 1 3G voice channel, and where that host has no local 3G donor the handset falls back on the network reserve outside the repeater's reach.
The CVDW leaves out three service bands: the rural 800 MHz data layer, the 900 MHz old call layer and the 5G NR network; which other in-car combo should a buyer look at for each missing service?
The chassis tunes no Band 20 800 MHz rural data, no Band 8 900 MHz old call and no 5G NR in any band; a donor reading that lives only on 800 MHz points to the CVCW or CVCG in-car combos, a legacy 2G circuit call points to the CVGW or CVGD Band 8 variants, and no current in-car repeater in this family supports 5G. The chassis also cannot assist where the outside phone reads zero bars on the tuned bands.
What minimum external donor strength must the roof aerial collect before the booster helps, and why can a zero-bar dead zone not be rescued?
The outside handset should read at least one bar on Band 3 for the EE-family service or Band 1 for the all-network 3G reserve before the install can be judged useful; the repeater amplifies that weak donor and cannot create a signal from the handset's own transmitter. In a zero-bar cutting, tunnel, underpass, isolated valley or basement car park the chassis has nothing to amplify, so the call drops or the data stalls exactly as it would without the kit; moving to a stronger roadside bearing is the first fix.
Which UK licence condition and certification marks cover this in-car amplifier, and how far apart must the roof omni and cabin whip sit to keep the two stages from feeding back?
The CVDW sits in the Ofcom licence-exempt mobile repeater class for indoor and vehicle use, aligned with the Ofcom Technical Standard for Mobile Repeaters, and carries UKCA, CE and RoHS conformity marks. Mutual feedback between donor and server stages is stopped by the maximum physical separation between the magnetic roof omni and the interior whip, correct BS donor and MS server port connection, separate lead routing, and the automatic gain control that balances the field as handsets move between seats; an over-close whip or reversed port can latch oscillation on every vehicle transfer.
Learn More: CVDW Guides & Comparisons
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Band 3+1: EE Voice, 1800 4G & 2100 3G Explained
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Article Keywords
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