How many storeys or how large a basement before one repeater antenna stops being enough? Link-budget limits and a decision rule for Singapore.

Ask for the acceptance criterion, uplink and downlink budgets, IMDA licensing and re-test terms before you appoint a BDA/DAS contractor.

Does DMR need a different DAS than analogue? The passive layout is the same; the survey, uplink margin and acceptance test change. Engineer's guide.

Does a DAS backbone cable need to be fire-rated in Singapore? An RF engineer explains 2-hour survivability, riser routing and what to specify.

Steel racking and stacked stock create radio shadows in warehouses. Learn why open floors don't, how deep the dead zones go, and how to fix them.

Can a hospital two-way radio interfere with medical equipment? An RF engineer explains safe distances, power levels and DAS as the fix.

What does an in-building BDA/DAS cost to run after install? An RF engineer breaks down maintenance, batteries, re-tests and licence fees.

What fade margin should an in-building two-way radio DAS use? An RF engineer explains why -95 dBm alone fails and when 10 or 15 dB is needed.

What should you budget per square foot for an in-building radio BDA/DAS in Singapore? An RF engineer explains the cost drivers and why sq ft misleads.

Does a Singapore petrochemical or O&G plant need IECEx-rated DAS equipment? An RF engineer explains hazardous-area zones, barriers and antenna placement.

PoC/LTE or a UHF repeater/DAS for construction site dead zones in Singapore? An RF engineer compares coverage, cost and IMDA licensing.

How to keep two-way radio working in tunnels and deep MRT excavation sites in Singapore — leaky feeder, repeater placement and confined-space rules.

How a Singapore airport or transport terminal gets reliable two-way radio coverage — frequency band, DAS antenna spacing and dB figures from an RF engineer.

Singapore does not require building owners to make FM emergency broadcasts reach basements. What Parliament decided, and what actually covers you.

Section 20 of Singapore's Telecommunications Act lets IMDA direct an owner to provide radio-communication facilities — and what it does not cover.

The 30-floor walkie-talkie repeater rule is a sales figure, not an engineering threshold. The dB arithmetic, and what actually decides it on a Singapore site.

Rooftop or mid-level for a repeater antenna in a multi-storey building? The link budget runs out after 5-9 concrete slabs. An RF engineer explains.

IMDA's licence threshold for walkie-talkies in Singapore is a minimum of 2 sets, not a maximum of 5. Here is what actually moves you up a licence tier.

How to measure a building's RF noise floor in dB, and the reading at which filtering beats adding gain. Test method, thresholds and what it costs in coverage.

Voting receivers only fix the uplink. When satellite receivers beat an in-building DAS, when they fail, and what IMDA licensing adds in Singapore.