4.
Fit the vertical antenna on top of the tubular mast as
shown in Figure 4.
5.
Fit the helix antenna on the flange of the tube branch
as shown in Figure 4.
www.vaisala.com
Ref. M210814EN-A
0611-036
Figure 4 Connecting the Antennas
The following numbers refer to Figure 4 above:
6.
Connect the feeder antenna cable (RARC13) to the
OUT connector of the RAA111G.
7.
If you are mounting the whole antenna assembly on
top of an external mast, use the mounting sleeve of the
tubular antenna mast. The inner diameter of the sleeve
is 61.5 mm.
For instructions on connecting the antenna as a part of the
sounding system, see DigiCORA® Installation Manual.
WARNING
Always ensure that the antenna mast is connected to a
proper grounding point: a water conduit, a heating pipe or a
metal structure. Use separate cable for grounding if
necessary.
TECHNICAL DATA
Property Value
Vertical Antenna
Frequency range
400 - 406 MHz
Directivity
5 dBi
Polarization
Vertical
Horizontal pattern Omnidirectional
Helix Antenna
Frequency range
400 - 406 MHz
Gain
3dBic
Polarization
Right-hand circular
Horizontal pattern Omnidirectional
Telemetry Range
With RS92-SGP radiosonde
200 km
Amplifier
Gain
20 dB typical
Noise figure
<2 dB
Power input
+10 … 12 VDC, typically 130
mA through RF cable
Output impedance
Output impedance 50 ohms,
VSWR <1.5
Mechanics
Cable connector
Coaxial N-type male
Total height including mast
1760 mm
Inner diameter of mounting
sleeve
61.5 mm
Depth of mounting sleeve
200 mm
Distance between the
antennas
302 mm
Weight
11.4 kg with the feeder cable
6.3 kg without the cable
Standard cable length
33 m fixed
Environmental conditions
Operating temperature range -40 ... 55° C
Operating humidity range
0 … 100 % RH
Operating precipitation
Unlimited
Maximum wind speed
65 m/s
Storage temperature
-50 … +100 °C
Storage humidity
0 … 100 % RH
SPARE PARTS LIST
Part no.
Item
212167
Vertical antenna, connector N-female
215809
Helix antenna, connector N-female
RAA111G
Antenna Amplifier and Switch
DRW214802 Amplifier-to-antenna
cable
RARC13
Antenna cable, 33m
1
=
Holes in the antenna mast and branch
2 = Tubular
mast
3
=
Flange of the tube branch
