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ArcLight Hub User’s Guide
Component Operating Procedures
Rev. 001 1081006 5-93
5.24 70L-band Up Converter
5.24.1 Overview
The 70L-band Up Converter converts 70 MHz signals transmitted by
the FLM for Teleport RF processing. The unit provides additional gain to
bring receive signals to an appropriate level and provides filtering to
reduce the dynamic range of the received signal. The unit is 1U high
and fits in a 19” rack. It supports an L-band input range between 950
and 2150 MHz. There is programmable cable slope compensation and
gain adjustment is in 0.2 dB steps from 15 to 45 dB.
The unit uses an on-board microcontroller that can be controlled by a
front panel keyboard (Figure 5-63) or through the RS-232 or remote
RS-422/485 interface over the Ethernet on the rear panel (Figure 5-64).
Figure 5-63. Front Panel, Up/Down Converter.
Figure 5-64. Rear Panel, Up/Down Converter.
5.24.1.1 FRONT PANEL OPERATIONS
A Liquid Crystal Display (LCD) and Light Emitting Diode (LED)
indicators have been organized such that important information is
available at a glance. The keyboard is divided into functional groups to
allow an operator to easily change any parameter from the front panel.
The green “POWER” LED is lit when power is on.
The red “STATUS” LED indicates an active alarm. The “STATUS” LED
lights amber when no alarms are active but alarms have been recorded
in the log. This LED does not light when no alarms are active and the
log has been cleared.
The green “REMOTE” LED is lit when the unit is under remote control
and is off while the unit is under local control.