Model 9289
Spectracom Corporation
NetClock/NTP Network Time Provider Instruction Manual
2-8
MOUNTING
HOLE PATTERN
SINGLE POINT GROUNDING
PANEL OR BULKHEAD
.0625 inch (15.88mm)
DIAMETER
.203 inch (5.16mm)
DIAMETER
INSTALL "O" RING
Figure 2-3: Model 8226 Impulse Suppressor
Refer to the Model 8226 Manual for proper installation.
2.5.5 Model 8227 GPS Inline Amplifier
An inline amplifier is required whenever GPS antenna cable lengths cause greater than 12 dB
attenuation. Using Spectracom CAL7xxx coax, an amplifier is needed whenever antenna cable
lengths exceed 200 feet.
The Model 8227 GPS Inline Amplifier, shown in Figure 2-3, extends the maximum cable length
to 600 feet. The Model 8227 provides 20 dB of gain and is powered by the NetClock receiver.
Figure 2-4: Model 8227 Inline Amplifier
Two LMR-400 field-installable N type connectors are provided with the Model 8227 to splice in
the amplifier 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 8227 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.
A five foot N type connector cable is also supplied with the Model 8227 to allow it to be installed
after the Model 8226 surge suppressor. The Model 8227 should always be installed after the
surge suppressor to prevent lightning or surge damage to the preamp.
Refer to the Model 8227 Manual for proper installation.
Summary of Contents for 9289
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