Page 6
The Aprisa SRi has an earth connection point on the top left and the top right of the
enclosure. Use the supplied M4 screws to earth the enclosure to a protection earth.
The antenna feeder cable should use grounding kits for lightning protection as specified
or supplied by the coaxial cable manufacturer to properly ground or bond the cable outer.
Warning: If the Aprisa SRi is operated in an environment where the ambient temperature exceeds 50°C, the Aprisa SRi must
be installed within a restricted access location to prevent human contact with the enclosure heatsink.
2.2. Connect the Antenna and Apply Power to the Aprisa SRi Radio
Connect the antenna to the antenna port TNC female connector. If the antenna is not available, terminate
the ‘TX / Ant’ port with a
TNC male 50 ohm terminator (10 Watts min).
Warning:
Do not directly connect the radio antenna port without attenuation of at least 40 dB. The receiver
can be damaged if signals greater than +10 dBm are applied to the antenna port.
The Aprisa SRi is operated from a DC source of voltage b10 VDC and +30 VDC (negative earth) and
consumes up to 20 Watts. External power supplies are available from 4RF as accessories (see the Aprisa SRi
User Manual).
The power connector (Molex 2 pin female) is supplied fitted to the radio. Wire your power source to the
power connector (- / +) and plug the connector into the radio. The connector screws should be fastened to
secure the connector.
Note:
The radio fuses will blow if the connected power supply is over voltage or the polarity is reversed.
Two spare fuses are located inside the enclosure
(see the ‘Spare Fuses’ section of the Aprisa SR
i User
Manual).
Turn your power source on. The radio LEDs will flash orange for one second and then the OK, MODE, AUX LEDs will light solid
green and the TX and RX LEDs will flash red. This is because the factory default Terminal Operating Mode for all Aprisa SRi
radios is set to Remote Station.
When the radio has been configured and has registered with the network, the TX and RX LEDs will be solid or flash green if the
network is operating correctly.
The Aprisa SRi radio is ready to operate.
Warning:
On link operation, RF energy is radiated from the antenna. Do not stand in front of the antenna.