ETRX2HR-PA Telegesis Ltd, ETRX2HR-PA Datasheet - Page 26

• Manufacturer Part Number: ETRX2HR-PA
• Description: MODULE
• Manufacturer: Telegesis Ltd

Specifications of ETRX2HR-PA

• Module Applications: AMR, Building Automation, Wireless Sensor Network, M2M Industrial Controls
• Mcu Supported Families: EM250
• Processor Type: EM250
• Wireless Protocol: IEEE 802.15.4
• Data Rate: 250Kbps
• Module Interface: I2C, SPI, UART
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

ETRX2PA
15.1 Example carrier board
Since the RF performance of the module with the on board antenna is strongly dependent on the
proper location of the module on its carrier board, Figure 10 shows the reference carrier board
which was used during testing by Telegesis.
Figure 10: Reference Board
For best performance it is recommended to locate the antenna towards the corner of the carrier
board and to respect the recommended keep-out areas as described in section 12.
Finally to provide a good reference ground to the on board antenna, the carrier board should have
a ground plane spanning no less than 60 x 50mm. In many cases a smaller ground plane will
suffice, but a degradation in radio performance could be the result.
©2009 Telegesis (UK) Ltd
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ETRX2PA Product Manual (Rev 1.07)