Key facts
- Brand
- Topcon
- Model
- GR-3
- Industry
- Industrial
- Documents
- 2
- Languages
- EN
- Last added
- 2026-10-04
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Topcon GR-3 Digital UHF Radio Addendum
This addendum provides detailed instructions for configuring the Digital UHF radio modem on the Topcon GR-3 receiver, covering Base/Rover setups in PDL and Simplex modes as well as GSM modem configuration. It also includes safety notices, required PC setup, and software tools such as Modem‑TPS.
Additional sections cover troubleshooting tips and comprehensive specifications for the modem’s transmitter, receiver, and general parameters, helping users optimize performance and resolve common issues.
All Topcon GR-3 documents by type
Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
Questions answered in these manuals
What PC requirements are needed to configure the GR-3 Digital UHF radio modem?
A PC running Windows 98 or newer, Modem‑TPS version 2.2p0 or newer, and a serial cable or Bluetooth connection are required.
What is the default protocol setting for the GR-3 Digital UHF radio modem?
The default protocol is PDL with End‑of‑Transmission (EOT).