SL869x-V2 Family Product User Guide
1VV0301175 Rev. 9 Page 55 of 93 2021-07-15
Further details and sample code are available under NDA from Telit MT3333 I2C
Application Note.
Antenna RF Interface
9.5.1. RF-IN
The RF input (RF-IN) pin accepts GNSS signals in the range of 1561 MHz to 1606 MHz
(1573.42 to 1577.42 MHz for the SL869-V2S) at a level between -125 dBm and -165 dBm
into 50 Ohm impedance.
Note: The RF input pin is ESD sensitive.
Note: Max ± 3V DC can be applied to the RF input.
(SL869L-V2 and SL869L-V2S)
The SL869L-V2 and SL869L-V2S modules include a DC blocking capacitor.
Note: RX pins have a maximum input voltage of 3.4 V (which is lower
than the maximum for Vcc or Vbatt).
(SL869-V2 and SL869-V2S)
These modules include a preselect SAW filter. This allows them to work well with a
passive GNSS antenna. For improved performance, or if the antenna cannot be located
near the receiver, an active antenna (that is, an antenna with a built-in low noise
amplifier) can be used.
(SL869L-V2 and SL869L-V2S)
These modules include a DC blocking capacitor, additional LNA and a SAW filter. This
provides improved performance in poor signal conditions or with passive antennas. The
LNA precedes the SAW filter in the RF path.
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