Owners Manual R4 0 New [verified] — Hytera Mt680 Tetra Mobile Terminal

The manual is ruthless here: For UHF (380-430 MHz) models, the antenna requires a ground plane of at least 30 cm radius. The R4.0 new version includes a troubleshooting flow chart for "High VSWR" errors, noting that modern thin-film antennas often fail this spec.

The control head can be separated from the main unit for installation in confined spaces. 4. Basic Operation & Controls 2-in-1 Knob: hytera mt680 tetra mobile terminal owners manual r4 0 new