Meinberg IMS-GNM181, Руководство по установке

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6 System Installation
Antenna splitter option
Several receivers can be connected to one antenna via the antenna splitter. Make sure, that the total length of
a route going from the antenna via the splitter to the receiver, does not exceed the maximum cable length. The
splitter can be installed at any position between antenna or, if used, the surge protector and receiver.
Receiver
Antenna splitter
Antenna
GNSS
GNSS
In
Out 3
Out 1
Out 2
Out 4
Route AB = 65 m (H155) - Total length „OK“
Route AC = 110 m (H155) - max. total length exceeded
A
B
C
Compensation the signal propagation time of the antenna cable
The receiving satellite signal is delayed by the used coaxial cable. The connected receiver must compen-
sate the signal propagation time of the antenna cable, therefore you need to enter the length of the antenna
cable in meters or the compensation time in nanoseconds into the settings of your receiver.
Antenna Cable Length (m):
Cable Delay Usage
RG58U 5 ns/m for GPS180 and GNS-UC
H155 4 ns/m for GNS180 and GNM
By entering the cable length (from antenna to receiver), the system calculates the delay time and compen-
sates it automatically.The default value of 20 m is preconfigured at delivery.
For other coaxial cable types please use the option "by delay" . The delay must be calculated by yourself
by using the information in the data sheet of the respective coaxial cable.
IMS-GNM181 Setup Guide Date: 25th February 2020 17