Nextel comm IR1200 - Manual (Page 41)

Stationary Installation
RFM-4200-5015 Rev1 33
impedance.
2 Position the antenna where it has a direct line-of-sight to the
satellite.
3 Mount the antenna according to the manufacturer’s
specifications or instructions. (Use only an approved
antenna – see list of Approved Antennas on page 31.)
NOTE: Because of the operating frequencies involved with the GPS
signal, splicing or using adapters to extend the length of the
antenna coaxial cable is not recommended and will likely prevent
the system from operating properly. We recommend that a single
length of coax without splices or adapters be used.