User's Manual

Radio Activity S.r.l. 15 / 44
station). At the same time the DSP synchronizes the internal time and clock on the defined source (e.g.: GPS
receiver).
See the main paragraph “Frontal Panel” for the table explaining the meaning of these led during the regular
functioning.
Note: Special version or customized SW may differ in indications.
3.2.5 Maintenance status
See the “IP discover procedure” described in a following paragraph to enter into the maintenance status and
the related led signaling.
3.3 Rear panel
The following picture shows the rear panel of KAIROS.
In the rear panel there are (up to) 7 connectors:
∞ RX diversity/main – female SMA-type connector. They are the input of the diversity/main channels
of the receiver. they are ground referred to discharge eventual static voltage, 50 Ohm of RF
impedance. Don’t apply continuous voltage to these inputs.
∞ TX – female SMA-type connector. It is the output of the transmitter. It is ground referred, 50 Ohm of
RF impedance. Don’t activate the transmitter without a proper load (50 Ohm) at this connector.
∞ GPS Antenna – female SMA-type connector (optional). A 5Vcc @ max 100mA is superimposed into
this connector to supply an external amplified GPS antenna. See the antenna details in the related
paragraph.
∞ I/O interface - 25 pin D-SUB. This connector holds a 12Vdc power supply, the balanced audio
interfaces, alarm I/O and some signals useful to interface KAIROS with external devices. For further
information about the use of these I/O see the related paragraph.