Spectracom Corporation
Model 9289
NetClock/NTP Network Time Provider Instruction Manual
2-7
Model 8225
Install impulse
suppressor between
the antenna and the
amplifier whenever
possible.
5 Foot Cable Included
Model
8226
Model
8227
NetClock
450
′
Minimum, 700
′
Maximum
(24 dB Minimum, 37 dB Maximum)
300
′
Maximum
(LMR 400)
16 dB Maximum
400
′
Maximum
(LMR 400)
21 dB Maximum
Figure 2-2: Cabling with Inline Amplifier
2.5.3 Model 8224 GPS Splitter
The GPS Antenna Splitter, Model 8224, is designed for use with an existing antenna/cable
setup. It eliminates the need and expense for a second antenna/cable run when two
synchronization systems are desirable. The Model 8224 should be installed indoors.
2.5.4 Model 8226 Impulse Suppressor
Spectracom recommends the use of an inline coaxial protector for all products with an outside
antenna. Spectracom offers the Model 8226, Impulse Suppressor, to protect the receiver from
damaging voltages occurring on the antenna coax. Voltages exceeding the impulse suppresser
trip point are shunted to the system ground. The Model 8226 is designed to withstand multiple
surges.
Two LMR-400 field-installable N type connectors are provided with the Model 8226 to splice in
the surge suppressor wherever it must be placed. However, the recommended method to avoid
having to cut the antenna cable is to determine the desired location of the Model 8226 ahead of
time and then order two lengths of pre-terminated cables instead of just one long cable that
spans the entire distance between the antenna and the NetClock.
Mount the suppressor indoors, preferably where the coax enters the building. Install the
suppressor on a grounding panel or bulkhead as shown in Figure 2-3.
Spectracom offers a grounding kit that includes grounding cable, clamps, mounting bracket and
ground plane. The Spectracom Part Number for this kit is 8226-0002-0600. Contact our Sales
department for additional information.
Summary of Contents for 9289
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