O
UTDOOR ENCLOSURE TYPE
MINI
HANDBOOK
11
2.5
Antennas
A range of GPS antennas are available that are compatible with the ODE-MINI. A selection are shown below.
70005
GPS marine active antenna, 5 dBi plus 28 dB amplifier.
70040
GPS active antenna, 3.5 dBi plus 50 dB amplifier.
2.6
Termination of RF Connections
The main enclosure terminates the RF input/output via N-Type female connections located on its baseplate.
N-Type connectors are available in both 50 and 75 ohm variants. 50 ohm N-Types are used in the majority of
applications, though if 75 ohm connectors are fitted, you MUST ensure that both halves are the same
impedance; mating dissimilar connectors will cause permanent physical damage.
RF inputs and outputs should not be exposed to DC voltage levels in excess of ±36 V.
Absolute maximum no damage RF input level is nom13 dBm
(some units may tolerate more power, please see module handbook).
Some transmitter modules are pre-configured to have a DC voltage present on the RF input connector to
power low noise amplifiers and similar equipment. All receiver modules will create up to 2 V peak DC
transient fro
m the RF output at start up into a 50Ω load (approximately 5 V into a 1 MΩ load). This may cause
failure in some very sensitive equipment.
70005, 33 dBi
Gain antenna
70040, 53.5 dBi
Gain antenna
