Motorola SG4-DRT-2X Instruções de Operação descarregar pdf (Página 88)

4-16 Modules

SG4000 Installation and Operation Manual

The EPIM contains microprocessor circuitry that collects telemetry data from all modules

installed in the SG4000 modular node. When a transponder module is installed, the EPIM

serves as the primary interface to the transponder, relaying the data to a remote interface.

The EPIM board contains a 3-gang, dual-in-line-package (DIP) switch, six jumper-selectable

header switches, indicator LEDs, and a reset switch. Table 4-9 provides descriptions and

functions of these user-interface settings.

Table 4-9

EPIM board user-interface settings

Description Function

Switch S2

Controls the attenuation of the ingress control switches (ICS) when they are installed in

the return paths of the RF modules. The three-position switch is factory preset for

minimum attenuation; however, they can be switched to a –6 dB state, and for a

maximum attenuation of approximately 40 dB. The following list indicates the dip

switch and its corresponding housing port:

S2-1

RF port 1

S2-2 RF port 2

S2-3 RF port 3

S2-4 RF

port 4

S2-5 RF

port 5

S2-6

RF port 6

Note: S2-7 and S2-8 are unused.

Switch SW1 Auto

The receiver pair in lid optics slots 1 and 2 operates in a redundant mode. The default

receiver is in lid optics slot 1. Upon loss of optical input power (below –5 dBm) on the

primary receiver, the EPIM automatically switches operation to the secondary receiver

in lid optics slot 2.

Switch SW1 A

The redundant operation is overridden and the receiver in lid optics slot 1 is enabled

regardless of optical input power.

Switch SW1 B

The redundant operation is overridden and the receiver in lid optics slot 2 is enabled

regardless of optical input power.

Switch SW2 Auto

The receiver pair in lid optics slots 7 and 8 operates in a redundant mode. The default

receiver is in lid optics slot 7. Upon loss of optical input power (below –5 dBm) on the

primary receiver, the EPIM automatically switches operation to the secondary receiver

in lid optics slot 8.

Switch SW2 A

The redundant operation is overridden and the receiver in lid optics slot 7 is enabled

regardless of optical input power.

Switch SW2 B

The redundant operation is overridden and the receiver in lid optics slot 8 is enabled

regardless of optical input power.

Status LED D6

This LED blinks constantly to provide visual indication of a properly functioning EPIM

module.

ICS LED D5

This LED is on when one or more ICS switches are in the –6 dB or –40 dB state.

Reset switch

You must press the reset switch after you make any changes to the station

configuration, including changing configuration plug-ins or adding or removing

modules.

The EPIM and SIC cable must be installed:

 in all redundant receiver configurations

 when ICS operation is used

 when a status monitor transponder is installed

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