User Manual

Exalt Communications, Inc.
Exalt i-Series Installation and Management Guide
5000001 65
2007-06-25
¶ Do not adjust the Radio Transmit Power parameter to a value higher than is
legally allowed.
¶ Do not adjust the Radio Transmit Power parameter lower than the link budget and
fade margin can afford.
The link may be lost and unrecoverable through GUI control. If the link is lost
due to reduction of Radio Transmit Power, travel to the radio location(s) may be
required to reset the value.
• Set the Bandwidth parameter to the designed level. The value of this is determined in
the design/engineering stage. The Bandwidth parameter must also match at both ends
of the link. In conjunction with the Mode parameter, the Bandwidth parameter
directly relates to the capacity, latency, and the number of TDM circuits supported.
The transmitter and receiver bandwidth are modified using this parameter, making it
critical that it be set with respect to the local RF noise and interference profile, and/or
in relation to any multi-link network design.
Note: Changing Bandwidth will temporarily interrupt traffic. The
Bandwidth parameter must match at each end. Adjust the far-end radio
first, and then the near-end radio. Changing Bandwidth changes the
radio’s threshold. A narrower bandwidth has better threshold performance
and improved interference immunity, therefore if changing to a wider
bandwidth, there is an opportunity that the link may be lost and
unrecoverable through GUI control. Check the available fade margin and
interference profile to determine if the impact to threshold and increased
bandwidth is acceptable to maintain the link and the desired performance.
If the link is lost due to increasing the Bandwidth parameter, travel to the
radio location(s) may be required to reset the value.
• Set the Mode parameter to the designed selection. The value of this setting is
determined in the design/engineering stage. The Mode parameter must match at both
ends of the link. In conjunction with the Bandwidth parameter, the Mode parameter
setting directly relates to the capacity of the system, as well as critical RF parameters,
including receiver threshold, carrier-to-interference ratio, and in some cases,
maximum radio transmit power.