GE MDS Mercury Series, Справочное руководство

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05-4446A01, Rev. C Mercury Reference Manual 7
gasket seal in the center of the radio case.
APs have a black gasket,
while Remote units have a yellow gasket.
In addition to gasket color, a label on the top of each radio identifies it
as an AP or Remote unit. If the label shows an
–A
suffix, it is an AP. If
it shows a
–R
suffix, it is a Remote.
1.2.2 GE MDS P23 Protected Network (Redundant)
Configuration
For mission-critical applications, a Protected Network Station is also
offered. This unit incorporates two Access Points, two power supplies,
and a switchover logic board that automatically selects between Trans-
ceiver A and Transceiver B as the active radio. Figure 1-2 shows the
protected chassis. For system-level information on this product, refer to
MDS publication 05-4161A01.
Invisible place holder
Figure 1-2. MDS P23 Protected Network Station
(incorporates two transceivers, with automatic switchover)
1.2.3 External GPS PPS Option
The External GPS Precise Positioning Service (PPS) option allows for
an external GPS device to provide the PPS input to the Mercury. This is
useful in installations where multiple radios require GPS timing. This
option prevents each Mercury from requiring its own GPS antenna.
Refer to the electrical specifications in the
External GPS PPS Option
section on Page 164 . This option is only available in hardware revision
1.0.2 or later.
1.3 APPLICATIONS
The following sections provide illustrations of typical transceiver instal-
lations. This is an overview only. A Network Administrator should be
involved in all installation planning activities.