Gnss Antenna Requirements - Teli LE910C1-NA Design Manual

LE910Cx HW User Guide
Note: If Rx Diversity is not used/connected, perfectly disable the
Diversity functionality using the AT#RXDIV command (refer to Ref 1:
LE920x4/LE910Cx AT Command User Guide) and connect the
Diversity pad F1 to a 50 Ohm termination or floating

GNSS Antenna Requirements

LE910Cx supports an active antenna.
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: 80502ST10950A_LE910Cx AT_Commands_Reference_Guide
document must be referred to install passive or active GNSS ANT
configuration by customer.
Note: If the GNSS is not used/connected, please disable the GNSS
functionality perfectly using the AT$GPSP command (refer to Ref 1:
LE920x4/LE910Cx AT Command User Guide) and connect the GNSS
pad R9 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)
Note: It is recommended to add a DC block to the customer's GPS
application to prevent damage to the LE910Cx module due to
unwanted DC voltage.
1VV0301298 Rev. 33 Page 63 of 128
Not Subject to NDA
2021-06-29