Model: MC-1-M (2U)
Doc. Ref. no. : - m05/om/101
Issue no. 14
Page 25 of 103
User’s Manual
Unit is equipped with internal fuse. If it is blown Up or blowing again on its
replacement, it is highly probable that either power source is incorrect or
power source connection is improper.
Internal fuse should be only replaced with same fuse type and same fuse
rating as supplied from manufacturer factory. Replacement of Fuse should be
done in unit Power OFF condition only.
6.1 GPS Antenna Installation
GPS Antenna and Cable Information
GPS Master Clock Model MC-1-M comes complete with the necessary hardware to be able to receive
GPS signals: 50-feet of RG-6 cable and a GPS antenna. The antenna cable is connected between the
female N connector on the antenna and the female BNC connector at the rear panel of the clock.
This section should help you with installing the GPS antenna and antenna cable(s) and connecting them
to the model MC-1-Mseries clocks. It should also be a source of information if you should need to trouble
shoot the antenna cable system. These clocks achieve their accuracy. By comparing and adjusting the
internal
clock
signal
to
the
incoming
GPS
signal.
6.1.1 GPS Antenna Installation
Refer steps for installation of GPS antenna and antenna cable as described below.
Selecting a GPS Antenna Site Outdoors
Select a site or antenna mounting position that...
• Is the highest point available
• Offers a full 360° view horizontally, to within 10° vertically of the horizon
• Is higher than neighboring buildings/obstructions
• Is protected from strong radio frequency (RF) and microwave transmissions
• Is set away from RF-reflective surfaces that cause multipath interference
• Is set 3 ft. (1 m) away from other GPS antennas
Avoid...
• Mounting the antenna between tall buildings or next to walls and equipment
• Cable type and cable length which runs from the antenna to the receiver that exceed the
specified length
• Patching multiple cables together to make a single cable run
• Running the cable through bulkheads and alongside high-energy cables
• Crimping or damaging the cable
Blocked signals and multipath cancellation may significantly increase GPS signals acquisition time.
Multipath Cancellation is caused by reflected signals that reach the antenna out of phase with the direct
