Juniper ACX7348 - Page 98

Connect an ACX7348 Router to a GNSS Antenna
IN THIS SECTION
Gain and Noise Figure (NF) Calculaon | 90
Antenna Cable Specicaons | 90
Cabling Guidelines | 93
Global Navigaon Satellite System (GNSS) capability is essenal for the Grand Master (GM) clock
funconality. The ACX7348 router supports an internal receiver. A GNSS receiver receives signals from
a navigaon satellite constellaon. The GNSS receiver gains precise phase and me informaon by
processing these signals and delivers the informaon across the network.
You must install a GNSS antenna to ensure opmal signal recepon. Juniper supports the Furuno
AU-217 antenna. For informaon about installing the AU-217 antenna, see GNSS Antenna AU-217
Installaon Procedure.
Before you connect an ACX7348 router to the external GNSS antenna:
• Understand the antenna cable specicaons. See Antenna Cable Specicaons.
• Follow the instrucons in Cabling Guidelines.
To connect an ACX7348 router to a GNSS antenna:
1. Connect one end of the LMR400 cable to the GNSS connector port (labeled GNSS) on the ACX7348
router.
2. Connect the other end of the LMR400 cable to the GNSS antenna. See Figure 46 on page 91.
Gain and Noise Figure (NF) Calculaon
To calculate the total gain and NF, see GNSS Antenna Installaon Appendix on the Furuno data
download page.
Antenna Cable Specicaons
The following topology (Figure 46 on page 91) depicts the antenna cable connecons with connector
types. Use this topology as an example to install the antenna cables.
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