From blueprint to reality: the power of coverage verification testing.

Once a Land Mobile Radio (LMR) site for the Public Safety Network (PSN) is constructed and its infrastructure is ready, a crucial step begins - coverage verification testing (CVT). 

With the expertise of TSNZ’s engineers and technology partner, Broadtech, every site is thoroughly tested to ensure it meets its coverage expectations.  

Before construction, TSNZ uses advanced prediction tools to analyse the terrain, topography, and vegetation to estimate coverage. Equipment at the site is then switched on, and Broadtech progresses to the drive-test phase, a real-world check to validate coverage predictions.  

To test those coverage predictions in the field, engineers at Tait Systems create a ‘model map drive package’. These packages include detailed drive routes with pinpointed waypoints selected to test signal performance across varied conditions and directions.  

Broadtech technicians then hit the road using Skodas – the same type driven by NZ Police - packed with specialised equipment to measure and assess coverage in the field.

Depending on the complexity of the landscape and the amount of data to be collected, some drive tests can wrap up in two days, while others stretch to 10 days.  

Trusted vendor Broadtech carrying out CVT drive testing in South Canterbury.

TSNZ caught up with Brett Thomson, Project Engineer at Broadtech, who said: 

“At first glance, it might seem like a long drive. And yes, our drive teams cover hundreds of kilometres. But as well as that, there’s deep analysis: interpreting data, understanding what we’re testing, and recognising early signs of potential issues. “ 

“We’re in constant contact with Tait Systems throughout the process. It's a hands-on, collaborative effort.”

The drive may be long, but every kilometre counts towards delivering reliable coverage where it’s needed most.