EVAL-***-HHTX EVAL-***-HHCP EVAL-***-HHLR WIRELESS MADE SIMPLE OEM TRANSMITTER EVALUATION KIT USERS GUIDE ORDERING INFORMATION PART DESCRIPTION EVAL-***-HHCP Compact Handheld Basic Evaluation Kit EVAL-***-HHLR Long-Range Handheld Basic Evaluation Kit EVAL-***-HHTX Full-Size Handheld Basic Evaluation Kit EVAL-***-KEY Keyfob Basic Evaluation Kit *** = 315, 418 (Standard), 433MHz = Number of buttons: 1 to 5 INTRODUCTION Linx OEM RF transmitters offer a simple, efficient, and cost-effective method of adding remote control and command capabilities to any product. The Basic Evaluation Kit is intended to give a designer all the tools necessary to correctly incorporate Linx OEM transmitters and receiver modules into a product. This guide will show how to take full advantage of the basic evaluation board that is included with the kit. The evaluation board serves several important functions: Rapid Evaluation - It allows the performance of the transmitters and receivers to be evaluated quickly in a users environment. Range Testing - Using the OEM transmitter and the included development board, a simplex transmission is generated that can be used to evaluate the range performance of the products. Design Benchmark - During the design process of your product, the kit provides a known benchmark against which the performance of your own design may be judged. Prototype Development - An on-board prototyping area is provided, which allows for additional circuitry to be placed directly on the board so that it can act as the first prototype of the product. All of the signals are available on a breakout header for easy connection to external circuitry. The kit includes 2 OEM transmitters, 2 KH2 Series receivers*, 2 PCB-mount RP-SMA connectors*, 1 development board, 1 CW Series antenna, 2 AAA batteries, and full documentation. *One part is soldered to the board one extra is for use on your first prototype board. Revised 4/5/11THEORY OF OPERATION OEM TRANSMITTER BUTTON ASSIGNMENTS OEM TRANSMITTERS Linx OEM transmitters are a great way to quickly bring a remote control product to market. They are fully assembled and certified, eliminating the need for D7 D6 design, tooling, and certification. Linx can also customize the transmitters with customer specific art, logos, or switch layouts. D3 D5 D4 The operation of the OEM transmitter is straightforward. When a button(s) is D0 D4 D2 pressed on the OEM transmitter, the states of D0 to D7 are formatted into secure D3 D2 packets by an on-board encoder IC. These encoded packets are sent to a Linx D1 transmitter that, through the antenna, conveys the data into free space. D1 D0 RECEIVER / DECODER EVALUATION BOARD The receiver board is powered by two AAA batteries. A Linx KH2 Series receiver is used for reception of the transmitted signal. This receiver provides exceptional sensitivity, allowing the transmitter and receiver to operate at distances of up to 1,000 feet (depending on TX model and signal conditions). The data recovered by the KH2 Series receiver is internally decoded. If the settings of the 10-position CMD-HHCP-*** CMD-KEY -*** DIP switch on the receiver board match the address setting of the transmitter, the CMD-HHLR-*** data lines are updated to match the state of the buttons on the OEM transmitter. To demonstrate this, one data line on the evaluation board is used to drive a LED CMD-HHTX-*** while another is used to activate a buzzer. Transistors are used as drive buffers since the KH2 receiver cannot directly source enough current for these devices. Figure 1: OEM Transmitter Button Assignments USING THE KIT RECEIVER / DECODER BOARD Attach the antenna to the board, set the address on the transmitter and on the board, turn on the power to the board, and press a button on the transmitter. SETTING THE ADDRESS 2 3 7 The Holtek encoder and decoder each have ten address lines that must match in order for the transmitter and receiver to talk to each other. If they do not match, then the decoder will ignore any transmission and take no action. 4 The address lines are tri-state, meaning that V , ground, and floating are CC 1 6 separate and valid states for the address. The OEM transmitters only make use 8 of the ground and floating states, so the receiver board is designed to match. 5 To set the address on the receiver evaluation board, note the A0 - A9 labels on the board and turn the DIP switches on or off as desired. If a switch is on, the address line is connected to ground. If it is off, then the address line is floating. The four OEM transmitters have different ways of setting their address lines. For your convenience, a brief explanation follows however, the OEM transmitter manual or Application Note AN-00300 should be referenced for complete details. 1. Battery - 3VDC (use 2 AAA style batteries only) 2. Power Switch The HHTX has an eight-position DIP switch accessed by opening the case. 3. Buzzer - D0 Switch number 8 corresponds to A0 and number 1 corresponds to A7. A8 and 4. LED - D1 A9 are floating on the transmitter and must be left off on the receiver board. 5. Prototyping Area The HHCP and HHLR utilize a ten-position DIP switch that is accessed by a 6. KH2 Series Receiver Module cover on the back of the remote. The switch numbers match the address lines 7. Reverse-Polarity SMA Antenna Connector with switch number 1 corresponding to A0 and number 10 to A9. 8. 10-Position Address DIP Switch The Keyfob has ten internal cut traces numbered 0 to 9 to match A0 to A9. If the Figure 2: OEM Basic Evaluation Kit Receiver / Decoder Board trace is intact, it is connected to ground when cut, it is floating. Page 2 Page 3