Sirio Antenne CX 4m series User manual

CX 4m seriesCX 4m series
CX 4m seriesCX 4m series
CX 4m series
VHF Base Station Antennas 68...88 MHzVHF Base Station Antennas 68...88 MHz
VHF Base Station Antennas 68...88 MHzVHF Base Station Antennas 68...88 MHz
VHF Base Station Antennas 68...88 MHz
Installation ManualInstallation Manual
Installation ManualInstallation Manual
Installation Manual
BCopyright SIRIO antenne - Technical Data are subjected to change - Printed in ITALY - Rev. 09/04/2008 - Cod. ID075
HI-QUALITY ANTENNAS MADE IN ITALY
NOTE:
 Lis the lenght indicated in the above pictures.
 It is recommended to use the curves just as a guide. Fine-tuning by using an SWR-Meter.
TYPICAL TUNING DIAGRAMS

DESCRIPTION
3/4 λ VHF antenna for base station service made of high quality materials to get the best
performance and the maximun efficiency. It is completely manufactured with aluminium tubes
and nylon for its great robustness and it is supplied with a solid steel bracket for an easy and safe
installation. Its Gamma Match feed makes it earthed for a perfect protection against the static
discharges. Simple and strong, it is particularly recommended for a professional use.
SPECIFICATIONS
Electrical Data
Type : 3/4 λCoax. J-Pole
Frequency Range : CX 4-68 from 68 to 73 MHz tunable by diagram
: CX 4-73 from 73 to 78 MHz tunable by diagram
: CX 4-78 from 78 to 83 MHz tunable by diagram
: CX 4-83 from 83 to 88 MHz tunable by diagram
Impedance : 50 ΩUnbalanced
Radiation (H-plane) : 360oOmnidirectional
Radiation (E-plane) : Beamwidth at -3 dB = 60o
Radiation angle deg. : 3o
Polarization : Vertical
Gain : 2 dBd - 4.15 dBi
Bandwidth @ SWR 1.5 : CX 4-68 ≥1.7 MHz @ 68 MHz
: CX 4-73 ≥2.0 MHz @ 73 MHz
: CX 4-78 ≥2.5 MHz @ 78 MHz
: CX 4-83 ≥2.5 MHz @ 83 MHz
SWR @ res. freq. : ≤1.2
Max Power : 500 Watts
Feed System / Position : Gamma Match / Base
Connector : UHF Female
Mechanical Data
Materials : Nylon, Brass, Steel, Aluminium
Wind Load / Resistance : 97 N at 150 Km/h / 150 Km/h
Wind Surface : 0.08 m2
Height (approx.) : from 2700 to 3360 mm
Weight (approx.) : 1900 gr
Mounting Mast : ∅35-42 mm
ID075
HI-QUALITY ANTENNAS MADE IN ITALY
MOUNTING INSTRUCTIONS
Correct mounting on mast Wrong mounting on mast
HARDWARE PARTS LIST
Qty Descriptions
n.2 M6x160 U-bolts
n.4 M6 Flat washer
n.4 M6 Lock washer
n.4 M6 Hex nut
n.1 M4x4 Hexagon socket set screw
n.1 2mm Exagonal key
n.1 ∅10mm PVC cap
See tuning diagrams next
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