The CTA88 chip is a simple encoder/decoder for use with ISM/SRD band telecommand modules. It permits a simple, one way wireless link to be established, for simple remote control applications, with a minimum of effort and no customer software input. These TX and RX application boards are designed to allow easy evaluation of the CTA88 device in elementary jobs. They provide a simple 8 channel implementations of remote control, using either LMT/LMR or BiM footprint wireless radio modules. ■ 8 bit address and 8 bit data select switches ■ 8 relays to control mains powered devices rated up to 8A, 250VAC/30VDC ■ Visual indication of valid code received and active relays ■ RF module range testing ■ 8 Push buttons for momentary control of relays ■ Momentary, Latched outputs ■ Dynamic relay state changes ■ Setup is simple as Plug-and-Play ■ RF Remote Control Demonstration Kit Contents The CTA88 application kit is supplied with the following contents: ■ 2 CTA88-000-DIL or 1 CTA88H (500mW) Encoder board ■ 1 CTA88 Decoder board ■ 1 Radiometrix Transmitter module (ordered separately) ■ 1 Radiometrix Receiver module (ordered separately) ■ 1/4-wavelength monopole or helical antennas ■ 8 Jumper Links ■ External power supply or 12 V DC power adaptor Radiometrix Ltd CTA88 application board manual

Common features: Radiometrix Ltd CTA88 application board manual page 2

TX application board jumpers and DIP switches The TX encoder board has 4 jumpers and 2 DIPswitches. The jumpers are used to select the number of operating modes featured in the board while the 4 way and 8 way DIP switches are used for frequency channels selection and address selection respectively. Assumed the board is held "long side horizontal" with the RF and power connectors at the top Radiometrix Ltd CTA88 application board manual page 3

TX application board DIP switches The TX application board features an 8 way (S1) and a 4way (S2) DIP switches. The optional 4 way DIP switch which is used for parallel frequency channel select is only required when our multi channel LM series radios like LMT1 / LMT2 s are used. The 8-way DIP switch is used to set an 8 bit (256 combinations) unit address. CTA88 RX Application board Radiometrix Ltd CTA88 application board manual page 4

RX application board DIP switches The RX application board features a 4 way (S2) and an 8 way (S1) DIP switches. The optional 4 way DIP switch which is used for parallel frequency channel select is only required when our multi channel LM series radios like LMR1 / LMR2 s are used. The 8 way Dip switch is used to set an 8 bit (256) unit address. Operating modes Device operation is set up by a 3 bit word, on the C0-C2 jumpers. This is JP12 on both the TX and the RX boards. Which modes to use? The CTA88 have a variety of operating modes. These are better understood by relating them to different applications:...

4. Monitoring infrequent events (such as door open/shut): Use transmitter in periodic transmit (101, to keep channel occupancy and power usage low), and receiver on 010 (3 second timeout), 011 (hold last burst) or 110 (serial data output, to a PC or data logging device). In this mode the transmit duty cycle is less than 10% on average, and the variable delay between bursts permits same channel operation of several CTA88 links with minimum transmit collisions 5. Send burst on trigger event: Set transmitter to mode 000 (off) and use C0 line high as a 'strobe' line. A pulse between 100µs and 25ms...

CTA88 application boards: customisation options Radiometrix Ltd CTA88 application board manual page 7

Figure 5: Schematic of CTA88 Encoder application board for BiM / LMT Transmitter CTA88 application board manual

Figure 6: CTA88 BiM / LMR Receiver Decoder application board Schematic CTA88 application board manual

Figure 7: Schematic of CTA88H Encoder application board for AFS2 Amplifier, LMT2 Transmitter

Figure 8: CTA88H Encoder application board for AFS2 Amplifier, LMT2 Transmitter

Figure 10: CTA88 Encoder application board SHX1T/ UHX1T/ FPX3T Transmitter

Figure 11: Schematic of CTA88 Decoder application board for SHX1R / UHX1R / FPX3R Receiver

Figure 12: CTA88 Decoder application board for SHX1R / UHX1R / FPX3R Receiver

Copyright notice This product data sheet is the original work and copyrighted property of Radiometrix Ltd. Reproduction in whole or in part must give clear acknowledgement to the copyright owner. Limitation of liability The information furnished by Radiometrix Ltd is believed to be accurate and reliable. Radiometrix Ltd reserves the right to make changes or improvements in the design, specification or manufacture of its subassembly products without notice. Radiometrix Ltd does not assume any liability arising from the application or use of any product or circuit described herein, nor for any...