Meinberg LANTIME IMS-M500, Руководство пользователя

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6 Available GPS / GLONASS L1 Antennas
6 Available GPS / GLONASS L1 Antennas
For our combined GPS / GLONASS satellite receivers, there are two available antennas, which are designed
for different tasks or applications. Our standard accessory includes a 40 dB L1 GPS / GLONASS L1 antenna,
which is optimized for stationary operation.
For mobile applications, such as motor vehicles, ships, trains and planes we recommend the use of the RV-
76G, an active GPS / GLONASS antenna, suitable for direct mounting into an enclosure (chassis, panels, etc.).
6.1 40dB GPS-L1/GLONASS-L1/GALILEO-E1 Timing Antenna with
Integrated Lightning Protection
The GPS and GLONASS satellites are not stationary but circle round the globe in a period of about 12 hours.
They can only be received if no building is in the line-of-sight from the antenna to the satellite, so the antenna
unit must be installed in a location with a free view to the sky. The best reception is given when the antenna
has a free view of 8
◦
angular elevation above horizon. If this is not possible the antenna should be installed
with a mostly free view to the equator because of the satellite courses which are located between latitudes of
55
◦
North and 55
◦
South. If even this is not possible problems occur especially when at least four satellites for
positioning have to be found.
The active L1 timing reference antenna is specifically designed for long-lasting, trouble-free deployments for
a variety of applications. The low noise, high gain amplifier is well suited to address attenuation issues. The
proprietary quadrifiliar helix design, coupled with multistage filtering provides superior out-of-band rejection
and lower elevation pattern performance than traditional patch antennas.
• Their unique radome shape sheds water and ice, while eliminating problems associated with bird perching.
• This antenna is made of materials that fully comply with provisions stipulated by EU directives RoHS
2002/95/EC.
•
The antenna provides integrated lightning protection capability.
•
The antenna also features ESD, reverse polarity protection and transit voltage suppression.
A standard coaxial cable with 50 ohm impedance should be used to connect the antenna to the receiver. The
max. length of cable between antenna and receiver is 50 meters (H155 - Low-Loss).
See data sheet "40 dB GPS L1/GLONASSL1/GALILEO E1 Timing Antenna with Integrated Lightning Pro-
tection" (pctel_gpsl1gl.pdf) or download this document:
Active GPS/GLONASS Antenna
http://www.meinbergglobal.com/download/docs/other/pctel_gpsl1gl.pdf
LANTIME IMS-M500 Date: 9th June 2016 13