124
Using a Surge Arrester
A.2
Installation
A.2.1
Mounting Location
Location is a key consideration when installing the Model AS0094500. Mount as close as possible to a good
earth ground, such as a grounding rod or station ground grid. The shorter the path between the arrester
and the earth ground, the more effectively and reliably it will bypass the induced voltages.
A.2.2
Ground Connection
The Model AS0094500 can be grounded in two ways: (1) via the ground-wire screw connection, or (2) by
hard mounting directly to a grounded metal surface.
If grounding via the ground-wire screw connection, use the largest possible gauge wire, with the shortest
possible ground path. Hole diameter allows up to 8 AWG wire (0.129 in or 3.26 mm). Alternately, the
AS0094500 could be mounted directly to a well-grounded plate within the facility.
A.2.3
Antenna and Clock Connections
The AS0094500 is labeled to indicate which terminals should be connected to the GNSS receiver and to the
GNSS antenna. Use only a low-loss, tri-shield or quad-shield 75 Ω coaxial cable – RG-6 or RG-11 are the
preferred cable types. RG-59, or other similar types of coaxial cable, should be avoided due to greater signal
loss and poorer shielding at the GNSS frequency (1.575 42 GHz).
A.2.4
Weather Sealing the Connections
To protect from weather, use only type F connectors with appropriate sealing features.
Typically this
includes an o-ring in the male connector that seats against the face of the female connector on the surge
arrester. Also, crimped connectors frequently include a silicone gel flooding compound, which enhances the
ability of the connection to withstand the rain and humid conditions. To better seal the entire connection,
cover the joint with GE Silicone II compound.
Use the proper crimping tool if using crimp-on connectors. Improper tools may not guarantee a strong
and sufficiently grounded connector resulting in poor cable performance and GNSS reception. Consider
purchasing RF cables of various standard and custom lengths manufactured by Arbiter Systems.
A.3
Physical Dimensions
Overall:
59 mm
×
38 mm
×
18 mm (2.32 in
×
1.49 in
×
0.71 in) L
×
W
×
H
Mounting Hole Dim:
50 mm
×
15 mm (1.969 in
×
0.594 in)
Mounting Hole Dia:
4 mm (0.157 in)
F Connector Dim:
24 mm, center to center
Weight:
48.2 g (1.7 oz)
A.3.1
Suggested Mounting
Figure A.2 illustrates the recommended mounting of the AS0094500 with the F-connectors facing downward.
Install drip loops in the cables to reduce the likelihood of moisture penetrating the device.
Содержание 1201B
Страница 4: ...iv ...
Страница 153: ...B 7 Four Fiber Optic Outputs 135 Figure B 4 Jumper Locations ...
Страница 155: ...B 8 8 Channel High Drive IRIG B Amplifier 137 Figure B 5 8 High Drive Outputs Jumper Locations ...
Страница 171: ...B 10 Four Additional Outputs and Dry Contacts 25 50 Vdc 153 Figure B 7 Option Connector Signal Locations ...
Страница 222: ...Appendix E Statement of Compliance The following page is a statement of compliance that includes Model 1201B and 1201C ...