Telit Wireless Solutions LE910C1-AP - Hardware Commands; Powering On the Module; Module Initialization and Activation

LE910Cx mPCIe Hardware Design Guide
1VV0301510 Rev. 13 Page 49 of 73 2021-07-07
Not Subject to NDA
Item
Value
The bands supported by each variant of the xE910Cx module
family are provided in Section Product Variants and Frequency
Bands
Impedance
50 ohm
VSWR recommended
≤ 2:1 (limit to fulfill all regulatory requirements)
Table 24: Antenna Diversity Requirements
7.3.4. GNSS Antenna Requirements
LE910Cx modules supports an active antenna. LNA BIAS provided by onboard 3V, 100mA
Linear Regulator. Follow LE9x0 AT Command User Guide 80407ST10116A to control
GPS_LNA_EN (pin 48).
It is recommended to use antennas as follow:
• An external active antenna (17dB typ. Gain, GPS only)
• An external active antenna plus GNSS pre-filter (17dB typ. Gain)
Note
: If Rx Diversity is not used/connected, perfectly disable the
Diversity functionality using the AT+XRXDIV command (refer to
80490ST10778A LE920x4/LE910Cx AT Command User Guide) and
connect the Diversity ANT Connector to a 50 Ohm termination or
floating.
Note
: The external GNSS pre-filter is required for the GLONASS
application.
The GNSS pre-filter must meet the following requirements:
Source and load impedance = 50 Ohm
• Insertion loss (1575.42–1576.42 MHz) = 1.4 dB (Max)
• Insertion loss (1565.42–1585.42 MHz) = 2.0 dB (Max)
• Insertion loss (1597.5515–1605.886 MHz) = 2.0 dB (Max)