B Rear-panel connectors
The following sections describe the connectors on the rear-panel of the PolaRx5S.
B.1 MAIN (TNC)
Connect an active GNSS antenna to this connector. The resultant gain at the connector
(antenna gain minus cable losses) must be in the range 15 to 50dB.
By default, the receiver provides a 5V DC supply on the MA
I
N connector to feed the antenna.
Other voltages can be supplied through pin ANT_EXT of the
I
N connector on the front panel
(see Appendix A.6). The maximum supported current is 200mA.
Never inject a DC voltage into the MA
I
N connector as it may damage the receiver. When
using a splitter to distribute the antenna signal to several receivers, make sure that no more
than one output of the splitter passes DC. Use DC-blocks otherwise.
B.2 PPS OUT (BNC)
xPPS output (5V, output impedance 50-
Ω
). The rate and polarity of the xPPS output signal
can be speci
fi
ed by the
setPPSParameters
command or on the Web
I
nterface The pulse
duration is 5ms.
B.3 REF OUT (BNC)
The REF OUT connector provides a 10 MHz output signal synchronized with the frequency of
the internal receiver clock.
I
t is a sinusoidal signal with unloaded peak-to-peak amplitude of
1.1V and output impedance of 50
Ω
.
Note that the REF OUT signal can be turned o
ff
with the
setREFOUTMode
command. See
also Section 2.1.1
B.4 WiFi (SMA)
Connector for the WiFi antenna.
94
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