TEK-NTS03-G+-Manual-v3.-012022
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4.
BACK PANEL – INPUTS AND OUTPUTS
Ant: Antenna Connector (SMA Connector)
The “ANT” antenna input provides an interface for an external active antenna.
The antenna should be connected using a high quality, low-loss 50
Ω coaxial
cable. The center conductor supplies 5 VDC (100 mA max) to power an active
antenna.
Care should be taken to ensure that the connector is not cross threaded when
attaching the antenna lead-in cable. The connector should be tightened firmly by
hand only. Do NOT over-tighten! Ensure the antenna SMA male connector center pin
is straight before plugging in.
Antenna Cable Considerations
The NTS 03-G+ antenna port expects a signal with a gain of at least 15 dB, and no more than 35
dB, with 20 - 35 dB being the optimal gain range.
All antenna cables will introduce some signal loss in the antenna installation system, which will
be dependent on cable length. The total gain of the antenna installation should fall within the
ranges specified below. The total gain is calculated by the gain of the antenna (Tekron supplied
antenna provides 40 dB gain) minus the antenna cable loss.
Figure 16 Recommended antenna cable loss range
Note
: The above figures are based on an average GNSS signal strength of -130 dBm at sea level,
and assumes that the Tekron supplied antenna is used.