Nesis III — Installation Manual
4. GNSS Antenna Installation
The following table shows approximate elapsed backup times
2
that were ob-
tained from 1.2 Ah 12 V battery for some typical configurations. Longer
elapsed time can be achieved by using a battery with larger capacity (2 Ah,
2.7 Ah, 3.4 Ah, . . . ) at the expense of weight increase.
Configuration
Time
Nesis and DAQU
37 min
Nesis, DAQU, Digi
TBD
Table 1:
Backup times achieved on a full 1.2 Ah battery at 22
◦
C. All instru-
ments running at 100% brightness.
Reducing brightness level significantly increases backup times.
4
GNSS Antenna Installation
The GNSS system in Nesis consists of two parts: the GNSS module and GNSS
antenna. The module is an integral part of the AD-AHRS-GNSS device, which
is built in the Nesis and the antenna cable connects to the back side of the
Nesis.
Standard SMA male connector is used on the antenna coaxial 50 Ω cable to
connected to the Nesis, Figure 12.
1
2
Figure 12:
GNSS antenna connection:
1
O
– SMA male connector of GNSS
antenna cable,
2
O
– SMA female connector on the Nesis back side.
For the most reliable performance, the antenna requires a clear view of the sky.
The supplied antenna shall be mounted inside the cockpit on a place, which
will give the best 360
◦
view of the sky. Top of the instrument panel, below the
windscreen is a typical place. Try to follow the following recommendations:
2
Elapsed time when equipment is running solely on the power from backup battery.
21
©
Kanardia
2018
