User's Manual

Exalt Communications Inc.
EX-2.4i Installation and Maintenance Manual
Page 15
MAN-002400, Revision 001
2005-12-01
Yellow = Link and/or Status are in a yellow state
Red = Link and/or Status are in a red state
Off = System is not properly powered/system failure
Table 4-2: Indicators
4.1.3 Control Overview
There is only one external control on the EX-2.4i, a button labeled “RMT” (Remote). This button
allows the user to easily and quickly evaluate the status of the remote end radio. Press and hold
the button and, while held, all local end status LEDs (Link, Status, T1/E1, DS3) represent the
status of the LEDs on the remote end radio. In addition, the RSL Voltage also represents the
voltage that is present at the remote end.
When the amber LED that is embedded in the RMT is flashing, this is an alert that the remote
end has an alarm condition, and the button should be pressed to determine the alarm conditions.
When the RMT button is pressed and held, and all local LEDs flash, there is no far end
information available. This indicates that the remote radio is either not powered, is booting, or is
not linked in the direction towards the local radio, or the local radio is receiving excessive errors
in this direction. It could also indicate a serious failure of the local or remote radio. Examining
local end LEDs (when this button is not pressed) in combination with the remote end information
(from a technician located at the far end, and/or when the button is pressed) can aid in
troubleshooting analysis.
4.2 Applying Power
The radio requires a DC power source within specifications, as stated. The DC may be provided
from a DC battery source, central lab/rack supply or from Exalt’s AC adaptor (sold separately).
4.2.1 Terminating the RF Connector
Before applying power, the device’s RF connector must be properly terminated into a 50-ohm
load. If this is not performed, the radio may be damaged by simply applying power. Also, there
are human safety factors to consider regarding potentially harmful RF radiation.
There are a few simple means to accommodate this proper termination:
• Connect a 50-ohm coaxial termination device to the RF port of the radio. The termination
needs to be rated to 1W (or more). Example(s) include:
o Broadwave Technologies P/N 552-200-002, or similar
• Connect the complete transmission system. That is, the RF cabling including the antenna.
The cabled antenna provides a proper termination for the RF output.