Spectracom Corporation
Model 9289
NetClock/NTP Network Time Provider Instruction Manual
2-5
This International and US Desk Top adapter has a detachable AC power cord to an IEC
320 connector. The power adapter is shipped with a line cord compatible with AC receptacles
(NEMA 5-15R) commonly found in the United States and Canada. Alternate type line cords or
adapters may be obtained locally.
The chassis ground stud allows the NetClock chassis to be connected to an earth ground or
single point ground. Connecting the chassis to a single point ground system may be required in
some installations to ensure optimum lightning protection. An earth ground is also
recommended in installations where excessive noise on the power line degrades receiver
performance.
Rack-mount ears are provided in the ancillary kit if the NetClock will be installed in a standard
19 inch rack.
2.4
Rack Mounting
To rack-mount the unit, locate the rack-mount ears. Using the rack mounting screws provided
in the ancillary kit (refer to 1.3.1,
Inventory
), mount the ears to the sides of the unit. (If the
Netclock is to be mounted flush with the front of the rack, mount the ears to the front of the unit.)
Slide the unit into the rack and connect the ears to the rack using appropriate screws (not
provided).
2.5
GPS Antenna Installation
2.5.1 Antenna Cable for Outdoor Antenna
When using the Model 8225 GPS outdoor antenna, Spectracom recommends using LMR-400
low loss type cable for the GPS antenna cable. To simplify the installation process, Spectracom
offers GPS cable assemblies terminated with Type N Male connectors. Standard lengths are
10, 25, 50, 100, 150 and 200 feet.
If the antenna cable is purchased locally, select coax suitable for outdoor use. Consider the
cable's weather ability, temperature range, UV resistance, and attenuation characteristics.
Do not allow the antenna cable to be placed in standing water, as water may permeate through
the coax jacket over time. On flat roof installations, the coax can be suspended by cable
hangers or placed in sealed PVC conduit. Apply a weather proofing sealant or tape over all
outdoor connections.
Installation of a surge protection device in the antenna line is recommended to protect the
NetClock receiver and connected devices from lightning damage. Spectracom offers the Model
8226 Impulse Suppressor to shunt potentially damaging voltages on the antenna coax to
ground. Refer to the Model 8226 Impulse Suppressor Section for a complete description of the
Model 8226.
Summary of Contents for 9289
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