Siemens ET7 Series Spécifications télécharger pdf (Page 55)

DSB75 Development Support Board Rev. B1 Hardware Description

Strictly confidential / Released

DSB75_hd_v08 Page 55 of 94 29.09.2005

3.13 Antenna Interface

The RF signal of the GSM module is connected via the supplied RF adapter cable to the

Hirose RF jack X505 located on the DSB75. Furthermore, in order to send or receive data,

connect an external RF antenna to the SMA jack X506 which is internally connected to the

Hirose RF connector X505.

To obtain optimum send and receive performance, a steel grounding plate (at least 300mm x

300mm) should be placed underneath the antenna.

Please consider that the supplied antenna equipment has been chosen to achieve optimum

RF performance when operating the GSM module at the DSB75. Siemens does not accept

warranty claims for damage caused by inappropriate equipment connected to the antenna

connectors.

Electrical characteristics are specified in section 7.

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Siemens ET7 Series Spécifications Page 55