Chapter 6 ____________________________________________________________ Technical Data
CHAPTER 6
TECHNICAL DATA
This chapter provides the technical specifications.
Table 2
Telemetry Antenna RB31 Specifications
Feature Specification
Antenna
Frequency range
400 … 406 MHz
Horizontal directivity
8 dBi
Vertical directivity
-3 dBi
Polarization near horizon
Vertical
Polarization at zenith
Circular
Number of corner reflectors
6
Amplifier
Gain
20 dB typical
Noise figure
<2 dB
Power input
+10 … 12 VDC, 130 mA through RF
cable
Output impedance
50 ohms, VSWR <1.5
Telemetry range
Telemetry range with RS92-SGP
radiosonde
350 km under normal
sounding conditions
Mechanics
Connector
Coaxial 7/16
Maximum diameter
1.1 m
Height without pedestal
0.8 m
Height with pedestal
1.55 m
Weight
32 kg
Standard cable length
33 m (greater lengths possible
with low-loss cable)
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
VAISALA _______________________________________________________________________ 17
