Exalt Communications, Inc.
r-series
Installation and Management Manual
5000007 (ETSI)
45
2007-02-12 (draft)
¶
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 (MHz) 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.
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.
Changing Mode will temporarily interrupt traffic
.
The Mode setting must
match at each end
. Adjust the far-end radio first, and then the near-end radio.
Changing Mode changes the radio’s threshold, carrier-to-interference ratio, and
also may have impact on the Radio Transmit Power. A lower mode has better
threshold performance and carrier-to-interference ratio, and in some cases, higher
output power, therefore if changing to a higher mode (for example, from Mode 1
to Mode 2), there is an opportunity that
the link may be lost and unrecoverable
through GUI control. Check the available fade margin and interference profile,
and determine if the impact to RF performance is sufficient to maintain the link
and desired performance. If the link is lost due to increasing the Mode parameter,
travel to the radio location(s) may be required to reset the value.