Description, Features, Data guide – Linx Technologies TRM-xxx-TT User Manual

Page 3: Tt series remote control and sensor transceiver

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Description

The TT Series transceiver is designed for
reliable bi-directional, long-range remote
control and sensor applications. It consists of
a highly optimized Frequency Hopping Spread
Spectrum (FHSS) RF transceiver and integrated
remote control transcoder. The FHSS system
allows higher power and, therefore, longer
range than narrowband radios. The transceiver
has obtained modular approval for the United States and Canada.

Eight status lines can be set up in any combination of inputs and outputs
for the transfer of button or contact states. A selectable acknowledgement
indicates that the transmission was successfully received. Operating in the
902 to 928MHz frequency band, the module achieves a typical sensitivity of
–112dBm. The base version is capable of generating +12.5dBm transmitter
output power and achieves a range of over 2 miles (3.2 kilometers) line of
site in typical environments with 0dB gain antennas. A high power version
outputs +23.5dBm achieving up to 8 miles (12.8km).

Primary settings are hardware-selectable, which eliminates the need for an
external microcontroller or other digital interface. For advanced features,
optional software configuration is provided by a UART interface; however,
no programming is required for basic operation. Housed in a compact
reflow-compatible SMD package, the transceiver requires no external RF
components except an antenna.

Features

• FCC and Canada pre-certified
• 2 mile (3.2km) or 8 mile (12.8km)

line of sight range

• Highly efficient power use
• Programmable receiver duty cycle
• No programming/tuning required

• 8 status lines, 2 byte data input
• Bi-directional remote control
• Selectable acknowledgements
• 2

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possible addresses

• Serial interface for optional

software operation

TT Series Remote Control
and Sensor Transceiver

Data Guide

Figure 1: Package Dimensions

Revised 3/18/2015

0.131"

(3.33)

0.630"

(16.00)

1.150"

(29.21)

1

1

Model: TRM-900-TT

Model: TRM-900-TT

Lot FX9nnT

Lot FX9nnT

FCC ID: OJMTRM900TTA

FCC ID: OJMTRM900TTA

IC: 5840A-TRM900TTA

IC: 5840A-TRM900TTA

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Additional Testing Requirements

33

Information to the user

34

Product Labeling

34

FCC RF Exposure Statement

34

Antenna Selection

36

Typical Applications

38

Antenna Considerations

39

Helpful Application Notes from Linx

40

Interference Considerations

41

Pad Layout

41

Board Layout Guidelines

43

Microstrip Details

44

Production Guidelines

44

Hand Assembly

44

Automated Assembly

46

General Antenna Rules

48

Common Antenna Styles

50

Regulatory Considerations

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