DE910 Series Hardware User Guide
1vv0300951 Rev.9 – 2015-05-11
Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights
Reserved. Page 40 of 77
6.2.
Antenna Diversity Requirements
This product includes an input for a second RX antenna to improve the radio sensitivity. The
function is called Antenna Diversity.
CDMA Antenna Diversity Requirements
Frequency range
Depending frequency band(s) provided by the network operator,
the customer must use the most suitable antenna for that/those
band(s)
Bandwidth
70 MHz in CDMA BC0
140 MHz in CDMA BC1
Impedance
50 Ohm
When using the Telit DE910, since there’s no antenna connector on the module, the antenna
must be connected to the DE910 antenna pad (F1) by means of a transmission line
implemented on the PCB.
In the case that the antenna is not directly connected at the antenna pad of DE910, then a PCB
line is required.
NOTE:
If the RX Diversity is not used/connected, disable the Diversity functionality using the
AT#CRXD command and leave the pad F1 unconnected. Please refer to the AT command
User Guide in detail.
WARNING:
Consider a mechanical design and a low-capacitance ESD protection device to protect DE910
or customer specific requirements from ESD event to Antenna port (F1).
