Vaisala CG31 Technical data

Vaisala Portable Antenna Set CG31

Features and beneﬁts

▪ ▪

The Vaisala Portable Antenna Set CG31 is a portable antenna designed to be used with GPS wind-nding systems. The antenna set consists of a Helix UHF antenna with antenna amplier and GPS antenna on a tripod. The antenna set is painted green as standard. One person can handle and assemble the antenna set.

The CG31 receives radiosonde signals in 400 MHz meteorological UHF band.

The tripod and the antennas fold compactly for transportation. The transport case is made of polypropene and equipped with wheels for ease of transportation. The transport case also holds an equipment bag, which contains foot pads, pegs and a hammer.

www.vaisala.com

Easy set up with captive parts

Long telemetry range - 150 km with RS92-SGP

Vaisala portable antenna CG31 is easy to set up and is well suited for portable installations.

Technical data

UHF Antenna

Type Full-wave Quadriﬁlar Helix Frequency range 400 … 406 MHz Gain (Elevation angle 25°) 3.5 dBic Polarization Right-Hand Circular Horizontal pattern Omnidirectional

Telemetry range

With RS92-SGP radiosonde 150 km

Ampliﬁer

Gain 20 dB typical Noise ﬁgure <2 dB Power input +10 … 12 VDC,

typically 130 mA through RF cable

Output impedance 50 ohms, VSWR <1.5

GPS Antenna

Primary power + 5 volts DC (± 10%) Power consumption 22 mA, 0.11 watts (nominal) Output impedance 50 Ohms Frequency L1 (1575 MHz) Polarization Right-Hand Circular

Polarization (RHCP) VSWR 2:1 Axial ratio 2 dB at zenith, 10 dB above 10° elevation Gain 35 dB (nominal) Noise 2.75 dB (nominal) Pass-band width 50 MHz Azimuth coverage 360° (omni-directional) Elevation coverage 0° to 90° elevation

(hemispherical)

Mechanics

Connector

UHF Antenna Coaxial N-type female

GPS Antenna Coaxial TNC-type female Diameter Footprint 1133 mm Total height assembled 1695 mm Weight

With cables 10.5 kg

With accessories and transport case 23 kg Transportation case dimensions 1380 x 355 x 385 mm Standard cable length 20 m

Environmental conditions

Operating temperature range -40 ... +55 ºC Operation humidity range 0 ... 100 %RH Operating precipitation Unlimited Maximum wind speed 65 m/s Storage temperature -50 ... +71 ºC Storage humidity 0 ... 100 %RH

For more information, visit www.vaisala.com or contact us at sales@vaisala.com

This material is subject to copyright protection, with all copyrights retained by Vaisala and its individual partners. All rights reserved. Any logos and/or product names are trademarks of Vaisala or its individual partners. The reproduction, transfer, distribution or storage of information contained in this brochure in any form without the prior written consent of Vaisala is strictly prohibited. All speciﬁcations — technical included — are subject to change without notice.