Motorola download firmware and programming software for ASTRO Digital XTS 3000 Full-Featured Model Portable Radio. Professional GP300/GM300 Series CPS. ASTRO 25 Trunking GTR 8000 Expandable Site Subsystem (ESS). GTR 8000 Base Radios feature a linear modulation (LSM) that provides industry-leading P25 coverage in VHF, UHF, 700/800 MHz and 900 MHz.