# SATEL Proof-TR9

A rugged, IP69K 1 W frequency-hopping radio modem for the license-free 902–928 MHz band in the United States and Canada.

- Product page: https://catalog.satelusa.com/products/ym6411/
- Category: Radio modems
- Status: current
- Part number: YM6411
- Manufacturer: SATEL Oy
- Image: https://catalog.satelusa.com/images/products/satel-proof.webp

## Overview

SATEL Proof-TR9 is a heavy-duty radio modem for machine control, smart farming, marine systems and other installations exposed to dirt, vibration, dust and water. The YM6411 model is intended for 902–928 MHz operation in the United States and Canada.

The radio uses frequency hopping in the license-free 900 MHz ISM band and provides a transparent RS-232 data link. Its sealed aluminum enclosure, surge-protected interfaces and additional GNSS-frequency filtering suit installations close to positioning equipment and exposed machinery.

## Highlights

- License-free 902–928 MHz ISM-band operation in the United States and Canada
- Frequency hopping with up to 1 W transmitter power
- IP67 and IP69K-rated die-cast aluminum enclosure
- Surge-protected power, data and antenna interfaces with GNSS filtering

## Specifications

### Radio

- **Frequency range:** 902–928 MHz
- **Carrier power:** 0.01–1 W, programmable
- **Spreading method:** Frequency hopping
- **Modulation:** 2-GFSK
- **Radio data speed:** Up to 115,200 bps

### Data interface

- **Interface:** RS-232 asynchronous serial
- **Serial data speed:** 4,800–115,200 bps
- **Power and data connector:** Deutsch DT04-6P-CL09

### Mechanical and electrical

- **Operating voltage:** +7–27.5 VDC
- **Dimensions:** 174 × 95 × 46 mm
- **Weight:** Less than 500 g
- **Environmental rating:** IP67 / IP69K when the mating connector is correctly assembled
- **Antenna connector:** TNC female, 50 Ω

## Compatibility

- SATELLINE-TR9

## Documents

- [Proof-TR4+ and Proof-TR9 product brochure](https://catalog.satelusa.com/documents/satel-proof-series/SATEL-Proof_TR4_TR9-03_2026.pdf) (datasheet)
- [Proof-TR4+, Proof-TR9 and Proof-TR489 user guide](https://catalog.satelusa.com/documents/satel-proof-series/SATEL-Proof-TR4_TR9_TR489_User-Guide_v3.7.pdf) (manual, version 3.7)

## Related products

- [SATEL Proof-TR4+](https://catalog.satelusa.com/products/ym6577/)
- [SATEL Proof-TR489](https://catalog.satelusa.com/products/ym6930/)