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Built for Australian radio

No IM₃ by name.
No interference by design.

noIM₃ reads Australia's licence register every day and feeds it straight into 94 engineering tools, so your design is checked against what is actually on air around it. When it is right, we lodge the frequency assignment under our own ACMA accreditation.

Start free → Need frequencies assigned? Explore the Platform → Open ACMA Tool

77 tools free forever, plus 14 days of Pro. Your projects save to your account. No credit card.

● 94 tools live 5,900+ real parts ACMA accredited
noim3.com/acma
ACMA Spectrum Tool: the national licence register, mapped and searchable

Where to start

Two halves of the same job

Most Australian radio projects need both: engineering that stands up in a report, and an accredited assignment to put the system on air. The same licence register feeds the tools and clears the assignment, so the work carries straight through.

The tool library: HF and microwave link planning, coverage, RF filter design, DAS, fibre, structured cabling and CCTV
Engineering

Designing a System

94 live tools across RF, electrical, comms infrastructure and network design. Every result shows its working and cites the standard it implements, so it holds up in a report with your name on it.

Browse the tools →
The live ACMA register mapped: every apparatus licence around a metropolitan area
Licensing

Assigning Frequencies

Point-to-point and point-to-area assignments, licensee and site registration. Coordinated against the live national register, then lodged with the ACMA under our own accreditation. Assignments, not advisory reports.

Request an assignment →

Accredited to assign

Our ACMA accreditation is general, so it is not limited to a particular service, band or licence type. Every assignment is coordinated and lodged by an accredited person.

Checked against other people's maths

Propagation and link modules are validated against independent implementations of the same ITU recommendations, not against ourselves. Each cites the edition it implements.

5,900+ real parts, not placeholders

34 equipment categories of actual vendor hardware, with measured antenna patterns and manufacturer datasheet figures behind the numbers.

Live Tools

The tools we use, open to you

View all 94 live tools →

These are not calculators built to fill a page. They are the tools we reach for on real jobs, which is why they show their working, cite the standard behind each number and run on actual vendor hardware rather than typical values.

ACMA Spectrum Tool screenshot

ACMA Spectrum Tool

RF Coordination & Licensing

Interactive ACMA register visualisation with advanced frequency planning algorithms. Analyse every site, forecast growth trajectories, and auto-optimise your entire frequency plan.

Open Tool →
HF Link Planner screenshot

HF Link Planner

High Frequency Radio

ITU-R P.533-14 propagation prediction with interactive ACMA site selection, MUF/LUF analysis and ranked frequency recommendations.

Open Tool →
Intermodulation Calculator screenshot

Intermodulation Calculator

Frequency Coordination

2nd, 3rd and 5th order intermod products to ITU standards. Visual spectrum analyser, system scoring and actionable frequency recommendations.

Open Tool →

RF Utilities

15 live tools

Antenna Utilities

11 live tools

Microwave Link Planning

9 live tools

Cable Utilities

7 live tools

Engineering Delivery

7 live tools

Network Design

5 live tools

Electrical System Design

5 live tools

Digital Signal Processing

5 live tools

Fiber Optic Design

5 live tools

System Capacity Design

4 live tools

Leaky Feeder Design

4 live tools

Serial Communications

4 live tools

High Frequency Radio

2 live tools

Coverage

2 live tools

Frequency Coordination

2 live tools

CCTV

2 live tools

Communication Rack Design

2 live tools

Distributed Antenna Systems

1 live tool

ACMA

1 live tool

Reference Data

1 live tool

Built to the published standards, and cited to the edition we implement

Proven in the field

On operational mine sites, MC² Engineered uses noIM₃ to validate underground frequency plans for intermodulation interference, and to generate the frequency plans that run production underground radio environments.

MC² Engineered

Underground radio & frequency planning

Reimagining the Australian Spectrum

The ACMA register, the way it should have always worked

Spending hours digging through the ACMA portal, rebuilding spreadsheets for every project, or waiting on answers about available spectrum is still the norm. That is exactly why the ACMA Spectrum Tool exists. It gives you a live, searchable view of every apparatus licence in Australia, so you can run coordination checks, build frequency plans, and understand your spectrum environment in one place.

noim3.com/acma
ACMA Spectrum Tool feature

Live ACMA Register, mapped

Every apparatus licence in Australia visualised on an interactive map. Filter by band, site, licensee, or geographic area in seconds.

Algorithmic frequency planning

Advanced algorithms calculate predictions for every single site, factoring in forecasted network growth and the full ACMA allocation plan across all bands.

Continuous compliance recalculation

The moment any selection fails a compliance check the entire frequency plan automatically recalculates. No gaps, no manual overrides, no missed conflicts.

Optimised for the future, not just today

Every viable frequency plan is ranked against current and projected conditions. Your selections are compliant today and built to withstand network growth.

Open the ACMA Tool →

And when the plan is right, we lodge it

Anyone can publish a calculator. Far fewer can complete the frequency assignment and lodge the apparatus licence application that follows. Our accreditation is general, so it is not limited to a particular service, band or licence type.

Fixed links

Point-to-Point Service

Fixed links coordinated end to end. We assign the frequency, check it against the surrounding licences and lodge the application.

Land mobile · area

Point-to-Area Service

Land mobile and area coverage assignments, coordinated against the live register so the assignment holds up once the system is on air.

Licensee setup

Licensee Registration

New licensees registered with the ACMA, so the licence can be issued in the right name from the start.

Site register

Site Registration

Transmitter sites registered against the national site register, ready for the licences that will sit on them.

Request a licence assignment → Search the register

From the blog

Technical articles and insights

View all articles →
Duplexer, Cavity Filter, Combiner or Multicoupler? What Each One Actually Does
RF Engineering

Duplexer, Cavity Filter, Combiner or Multicoupler? What Each One Actually Does

Four devices sit between a radio and a shared antenna, they look similar in a rack, and buying the wrong one is expensive. This guide explains what each actually does: why filter selection is decided by fractional separation rather than the gap in megahertz, why a duplexer's rejection comes overwhelmingly from a tuned transmission null rather than from its filter skirt, why a hybrid combiner throws away three quarters of your transmit power on four channels while a cavity combiner costs a fraction of a decibel, and why fitting a receive multicoupler can leave a receiver deafer than connecting it straight to the antenna. Includes measured figures from five duplexer legs, catalogue data from 441 real parts, practical selection rules and an FAQ.

Read article →
P25 vs DMR vs TETRA: Which Digital Radio Standard Should You Actually Choose?
RF Engineering

P25 vs DMR vs TETRA: Which Digital Radio Standard Should You Actually Choose?

On the nominal air interface calculation, P25 Phase 2, DMR Tier III and TETRA all land on one voice path per 6.25 kHz of carrier bandwidth. What actually separates them is how those voice paths land on whole RF carriers, and that decides how many transmitters you combine, how many transmit frequencies you licence, and what the ACMA charges you every year. This guide works the carrier and spectrum maths for each standard, prices the annual licence tax that follows from the choice under a clearly stated duplex access model, explains why a high density site and a remote site favour different technologies, sets out what Australia actually runs and where, and shows why receiver sensitivity figures cannot be compared across the three datasheets.

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How Much Does a Radio Licence Cost in Australia? What the ACMA Actually Charges
Compliance

How Much Does a Radio Licence Cost in Australia? What the ACMA Actually Charges

A single UHF land mobile licence in a high density area carries an annual ACMA tax of $2,062, and the identical licence in a remote area carries $44. That is not a typo, and it is not a discount you apply for. This is a full breakdown of what the ACMA charges for an apparatus licence, worked from the current fee schedule: the difference between the annual tax and the one off administrative charge, why a duplex repeater is charged on two spectrum accesses, the four density areas and what they do to the rate, the five inputs that move the number for a given licence type, and the $940 that an accredited person's frequency assignment certificate saves on a two frequency licence. Includes worked examples, the calculation order that trips people up, and a short FAQ.

Read article →

Start with the register already loaded

Create an account and you are working in minutes. 77 tools are free forever on a Standard account, every new account gets 14 days of full Pro to try the rest, and your projects save to your account so the work is still there next week.

Pick up where you left off, or open the register and check what is on air around your site.

Start free → Explore the platform → Get in touch

No credit card required. Cancel any time. Need a licence assignment? Talk to us →