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Installation
2.5
Telemetry Module Connectors/Interface
The physical connections from the telemetry module to the “outside world” have different types of apertures through the
enclosure depending on the type. There are two type of enclosure aperture layouts.
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2.5.1
Two C One Gland
The iRIS has an industry standard SMA connector which protrudes through the bottom edge of the enclosure base.
In areas of good signal strength, a small “stubby” or omni-directional type antenna will suffice. In areas of more marginal
coverage, the antenna should an external high gain type such as a Yagi, via appropriate low-loss high frequency coaxial
cable and male SMA connector.
Figure 16 – Antenna and communications port configuration
(Two C One Gland)
Important note!
The LTE CAT-1 module employs a two antenna approach for cellular communications. They are called Main
and Diversification. The main can be used by itself, but to get better reception a second antenna can be
connected to the iRIS diversity aerial connector.
This means there is a different definition to the two SMA antenna connection when an LTE CAT-1 module is
fitted compared to 3G modules. Please see Table below.
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