unitrunker.info

What It Is

Unitrunker 2.1 is a trunked radio decoding and monitoring tool for SDR use cases, covering protocols such as APCO P25, EDACS 4800/9600, Motorola, and MPT1327. It requires at least one supported SDR device, such as AirSpy, HackRF One, Realtek R820T/R820T2, or RTL-SDR.com V4, and runs on 64-bit Windows 8.x/10/11.

Core Capabilities

Based on its feature list, Unitrunker is not positioned as a general-purpose development tool, but as a radio protocol monitoring and analysis application. It supports automatic signal polarity, automatic protocol selection, control channel tracking, voice following, multiple SDRs, multiple VFOs, signal/voice-role VFOs, group/user/site/channel history, decoding logs, automatic log rotation and compression, plus visual, audio, and script-based alerts. The documentation also explains the Bandplan Wizard and frequency calculation methods in detail, making it suitable for users who need to derive and verify frequency plans for trunked systems. System data can be exported to Excel and XML, and RR DB downloads are supported.

Environment, Pricing, and Openness

The system requirements are clearly defined: a 64-bit multi-core Windows PC at 2.4GHz or above, .NET 4.6, 128MB of free memory, and at least 83MB of disk space. More resources are needed if monitoring multiple systems or keeping extensive logs. The main text does not clearly state the pricing, license type, whether it is open source, or supported payment methods. Legacy Remote DLL Support has been removed and replaced with a UDP mechanism; external user.js scripts are no longer supported and have been replaced by PowerShell.

Pros and Cons

Its strengths are clear protocol coverage and SDR support, along with fairly advanced history, logging, and voice-following capabilities, backed by detailed technical documentation. The limitations are also obvious: it is Windows-only, does not support Windows 7 or earlier, and cannot run in 32-bit environments. P25 Phase 1 and ProVoice audio can be decoded internally, but P25 Phase 2 audio is not supported. Compared with version 1, version 2 has a higher baseline memory requirement and increases CPU load by about 50% to 66%.

Who It’s For and Access from China

Unitrunker is suitable for SDR enthusiasts, radio monitoring users, public safety communications researchers, and technical users who need to analyze trunked system control channels, call history, and bandplans. The source text does not provide information about access from mainland China, so it is unclear whether the site can be reached directly, whether downloads are stable, or whether payment is available. If access or usage restrictions arise, similar SDR/radio decoding tools may be considered as alternatives, though this text does not name any specific alternatives.