User's Manual

RNU4000BS Base Station User Manual
42 Runcom Technologies Ltd.
4.4.4 Multi-sector Daisy-chained GPS Antennas
This section describes how to connect and synchronize GPS antennas for multi-sector sites
covered by a dedicated RNU4000BS unit per site (x4 Tx/Rx channels per site).
The BSs can be connected in two configurations:
• One GPS antenna can serve all the BSs
• For redundancy - each BS can operate with a dedicated GPS antenna.
4.4.4.1 Hardware Interconnections
The figure below illustrates a daisy-chain configuration for a four-sector base station site
with four RNU4000 units. Each unit has an integrated GPS module, and an internal holdover
circuit responsible for providing a 1PPS signal in case of loss of PPS source (from either the
integrated GPS unit or the PPS IN port).
Figure 28 GPS Synchronization Connection - (daisy-chain)
4.4.4.2 Configuration Parameters
For synchronization configuration and indication details description parameters refer to
“WEB GUI” section.
4.5 End-to-End Traffic Test
After the system is installed, it is recommended to perform an End to End (E2E) test to test
communication and traffic transference over the link.
In this test, a computer connected to a CPE (that is configured to operate with the BS)
sends a ping message towards the NOC (Network Operations Center) and AAA
(Authentication, Authorization and Accounting center). Receiving an answer from the
NOC/AAA side by the CPE's PC assures that the system is configured and operating
properly.
The following figure shows the end-to-end test elements.