SL869x-V2 Family Product User Guide
1VV0301175 Rev. 9 Page 50 of 93 2021-07-15
9.3.2. Logic Levels - Outputs
Table 27: Logic Levels: TX and 1PPS
Table 28: Logic Levels: ANT_ON
9.3.3. Antenna Related Signals
9.3.3.1. VCC-RF (Active Antenna Supply Voltage)
If an active antenna or external LNA is used, an external bias-T is required to provide
voltage to it.
(SL869-V2 and SL869-V2S only)
Note: A DC blocking capacitor is also required to prevent out-of-
range DC voltage from being applied to RF-IN except for SL869L-V2
and SL869L-V2S modules (which include a DC blocking capacitor).
9.3.3.2. ANT-ON (SL869L-V2 and SL869L-V2S only)
Antenna on (ANT-ON) is an output logic level to control the power supplied to an external
LNA or active antenna (for example, using an external FET switch connected from VCC-
RF to a bias-T).
When logic high, the external antenna or LNA should be active; when logic low the
external antenna should be powered down. Since this pin is internally connected to the
TCXO supply, it should be free of noise and loading should be minimal.
This signal is not available on the SL869-V2 or SL869-V2S.
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