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Related Manuals for Linx TT Series
Summary of Contents for Linx TT Series
- Page 1 TT Series Remote Control and Sensor Transceiver Data Guide...
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Page 2: Table Of Contents
Theory of Operation Module Description Do not use this or any Linx product to trigger an action directly Basic Hardware Operation from the data line or RSSI lines without a protocol or encoder/ decoder to validate the data. Without validation, any signal from... -
Page 3: Description
Data Guide Antenna Selection Typical Applications 1.150" Description (29.21) Antenna Considerations The TT Series transceiver is designed for Helpful Application Notes from Linx Lot FX9nnT Lot FX9nnT reliable bi-directional, long-range remote 0.630" control and sensor applications. It consists of Model: TRM-900-TT... -
Page 4: Ordering Information
Min. Typ. Max. Units Notes Receiver Section Part Number Description TRM-900-TT 900MHz TT Series Remote Control and Sensor Transceiver Spurious Emissions Per FCC 15.109 Receiver Sensitivity –110 –111 EVM-900-TT 900MHz TT Series Evaluation Module EVAL-900-TT TT Series Basic Evaluation Kit... -
Page 5: Absolute Maximum Ratings
+5.5 activation or receipt of a valid packet. Maximum 80ms if V < 2.6V Any Input or Output Pin −0.3 + 0.3 RF Input Figure 5: TT Series Transceiver Timings Operating Temperature −40 ºC Storage Temperature −55 +125 ºC Exceeding any of the limits of this section may lead to permanent damage to the device. -
Page 6: Trm-Xxx-Tt Typical Performance Graphs
-2.00 25°C -7.00 -12.00 -17.00 TX Output Power (dBm) Figure 8: TT Series Transceiver Peak Current Consumption vs. Transmitter Output Power at 5.5V LVL_ADJ Resistance (k ) Figure 6: TT Series Transceiver Output Power vs. LVL_ADJ Resistance 85°C -40°C 85°C 25°C... - Page 7 14.5 13.5 Supply Voltage (V) TX Output Power (dBm) Figure 12: TT Series Transceiver TX Current Consumption vs. Supply Voltage at 0dBm Figure 10: TT Series Transceiver Average Current Consumption vs. Transmitter Output Power at 5.5V 13.5 85°C -40°C 22.5 -40°C...
- Page 8 90 105 120 135 150 165 180 195 210 225 240 255 -111 -101 Duty Cycle (s) RF Input Power Level (dBm) Figure 15: TT Series Transceiver Average RX Current Consumption vs. Duty Cycle Figure 17: TT Series Transceiver RSSI Voltage vs. Input Power – – –...
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Page 9: Pin Assignments
ACK_OUT from another module after sending a control message. Figure 18: TT Series Transceiver Pin Assignments (Top View) This line sets the input/output direction for status lines S4-S7. When low, the lines are Pin Descriptions outputs; when high they are inputs. -
Page 10: Theory Of Operation
When S0 is taken high on one module S0 goes high on the receiving The TT Series transceiver is designed for operation in the 902 to 928MHz module, and so forth. A line that is an input on one side needs to be set as frequency band. -
Page 11: Basic Hardware Operation
Basic Hardware Operation The following steps describe how to use the TT Series module with ANTENNA hardware only. Basic application circuits that correspond to these steps are shown in Figure 21. 100k 1. Set the C0 and C1 lines opposite on both sides. -
Page 12: Transceiver Operation
Transceiver Operation Transmit Operation The transceiver has two modes of operation: Initiating Unit (IU) that Transmit Operation is entered when any of the status line inputs go high. transmits control messages and Responding Unit (RU) that receives control During Transmit Operation, the MODE_IND line is high. The module messages. -
Page 13: The Pair Process
Permissions Mask The Pair process enables two transceivers to communicate with each The TT Series Transceiver has a Permissions Mask that is used to other. Each transceiver has a local 32-bit address that is transmitted with control which lines an IU is authorized to control. With most systems, if every packet. -
Page 14: Mode Indicator
Mode Indicator Using the RSSI Line The Mode Indicator line (MODE_IND) provides feedback about the current The module’s Received Signal Strength Indicator (RSSI) line outputs a state of the module. This line switches at different rates depending on the voltage proportional to the incoming signal strength. The RSSI Voltage vs. module’s current operation. -
Page 15: Using The Low Power Features
Using the Low Power Features Power Level vs. Resistor Value The Power Down (POWER_DOWN) line can be used to completely power Power Power down the transceiver module without the need for an external switch. Power Resistor Level (dBm) Resistor Level (dBm) Resistor Level... -
Page 16: Receiver Duty Cycle
It also increases the time from activating the IU to getting a response from the RU. Please see Reference Guide RG-00103: the TT Series Command Data Interface for details on configuring the receiver duty cycle. The duty cycle is controlled by the Duty Cycle serial command through the Command Data Interface. -
Page 17: The Command Data Interface
Receive the entire control message serially instead of needing to monitor individual status lines. Get the IU address for logging access The TT Series transceiver has a serial Command Data Interface (CDI) attempts. that offers the option to configure and control the transceiver through software instead of through hardware. -
Page 18: Frequency Hopping
OUT. This improves the reliability of the system. Event Flags Event flags that are used with the Interrupt Mask. Figure 28: TT Series Transceiver Command Data Interface Commands and Parameters – – – –... -
Page 19: Usage Guidelines For Fcc Compliance
Usage Guidelines for FCC Compliance Information to the user The TT Series module is provided with an FCC and Industry Canada The following information must be included in the product’s user manual. Modular Certification. This certification shows that the module meets the... - Page 20 * Also available in 100mm and 200mm cable length Conformément à la réglementation d’Industrie Canada, le présent émetteur Figure 30: TT Series Approved Antennas radio peut fonctionner avec une antenne d’un type et d’un gain maximal (ou inférieur) approuvé pour l’émetteur par Industrie Canada. Dans le but de réduire les risques de brouillage radioélectrique à...
- Page 21 Typical Applications Figure 31 and Figure 32 show circuits using the TT Series transceiver. ANTENNA ANTENNA ANTENNA ANTENNA 100k 100k 100k ACK_EN ACK_EN MODE_IND MODE_IND 100k 100k ACK_EN ACK_EN PAIR PAIR 100k 100k MODE_IND MODE_IND 100k LVL_ADJ ACK_OUT LVL_ADJ ACK_OUT...
- Page 22 Figure 34 which address in depth key areas link are critically dependent upon the of RF design and application of Linx products. These applications notes are antenna. While adequate antenna available online at www.linxtechnologies.com or by contacting Linx.
- Page 23 Comparing your own design with a Linx evaluation board can help to determine if and at 0.045" what level design-specific interference is present.
- Page 24 This is a critical factor, especially short or couple to traces on the product’s circuit board. in high-frequency products like Linx RF modules, because the trace leading to the module’s antenna can effectively contribute to the length The Pad Layout section shows a typical PCB footprint for the module.
- Page 25 Washability Figure 39: Absolute Maximum Solder Times Automated Assembly The modules are wash-resistant, but are not hermetically sealed. Linx recommends wash-free manufacturing; however, the modules can be For high-volume assembly, the modules are generally auto-placed. subjected to a wash cycle provided that a drying time is allowed prior The modules have been designed to maintain compatibility with reflow to applying electrical power to the modules.
- Page 26 General Antenna Rules plane as possible in proximity to the base of the antenna. In cases where the antenna is remotely located or the antenna is not in close The following general rules should help in maximizing antenna performance. proximity to a circuit board, ground plane or grounded metal case, a metal plate may be used to maximize the antenna’s performance.
- Page 27 There are hundreds of antenna styles and variations that can be employed directly on a product’s PCB (Figure 47). This with Linx RF modules. Following is a brief discussion of the styles most makes it the most cost-effective of antenna commonly utilized.
- Page 28 Email: labinfo@fcc.gov and certification process. Here at Linx, our desire is not only to expedite the design process, but also to assist you in achieving a clear idea of what is...
- Page 29 Under no circumstances shall any user be conveyed any license or right to the use or ownership of such items. ©2018 Linx Technologies. All rights reserved. The stylized Linx logo, Wireless Made Simple, WiSE, CipherLinx and the stylized CL logo are trademarks of Linx Technologies.
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