SATEL-TR4+ Radio Module

SKU: YM74x0-1 Categories: ,


SATEL-TR4+ is a UHF data radio transceiver module in a lightweight single PCB. It features Satel’s highest data rates available in an integratable module, allowing up up 14.4kbps with FEC on a 12.5 kHz channel or 28.8kbps with 25 kHz channels. For sensitive applications, industry standard AES 128-bit encryption is available. This small, light module is designed to be integrated into a host device, for instance for transfer of GNSS correction data in a land surveying rover or RTK base station.

Compatibility spans a wide variety of SATEL modems with the 3AS/EASy protocol, with additional compatibility modes allowing for inter-operation with other radios including Leica, Topcon, Pacific Crest, Trimble, and others.

The SATEL-TR4+ is designed to be flexible. The following items can be customized:

  • Mechanical fastening and its type
  • Interface and antenna connector types
  • Shape of the PCB (for large orders only)

A receive only module is available as the M3-R4+.

Please contact us to learn more about customization options.

Additional information

Frequency Range

403 to 473 MHz

Tuning Range

70 MHz

Carrier Power

10 mW to 1 W

Receiver Sensitvity

up to -115 dBm, depending on modulation and error correction (see product brochure)



Data Interface Speed

up to 115200 bps

Electrical Interface


Packet Throughput

up to 28.8kbps (25kHz channel), 14.4kbps (12.5kHz channel)

Interface Connector

1.27 mm pitch socket

Antenna Connector

HIROSE U.FL compatible type (adapter cables available for TNC, SMA, MCX, MMCX etc.)


AES 128-bit (optional)

Operating Voltage

3.8 – 5.5 VDC

Power Consumption

0.89W RX, up to 4.8W Tx, 0.3W sleep

Operating Temperature Range

-30 °C to +70 °C

Size (H x W x D)

57 x 36 x 6.9mm



YM7470: SATEL-TR4+ with AES128 encryption support

YM7475: SATEL-TR4+ without AES128 encryption support

YM7480: SATEL-TR4+ with AES128 encryption support, DTE connector at TOP

YM7485: SATEL-TR4+ without AES128 encryption support, DTE connector at TOP

SATEL TR4+ Datasheet

Integration Guide: User Guides/Manuals