User's Manual

Table Of Contents
166 Operation
Chapter 4 - Operation and Administration
defined in the Frequency Bands File for the frequency band selected as the
Configured ODU Frequency Band of the associated ODU (see Section 4.8.4.3).
The help text (displayed upon clicking the Tab key) reflects the limitations
imposed by these rules.
In addition, the following rules must be followed in No Diversity mode if more
than one channel is used:
1 After configuring the Downlink Frequency f1 for one of the AU's Channels,
the Downlink Frequencies for other Channels of the same AU should be
configured using increments of +/- 0.875 MHz from the defined frequency:
f1 +/-(N*0.875).
2 The Downlink Frequencies of all Channels of the same AU should belong to
the same Frequency Bands Group (see Section 4.8.5).
Admin Status: The Admin Status must be disabled to enable changes in the
Configured ODU Frequency Band of an associated ODU. If the Configured
ODU Frequency Band differs from the actual band supported by the ODU, a
mismatch trap will be sent by the AU upon trying to associate it with a
Channel and the association will be rejected.
The Admin Status of all Channels belonging to the same AU must be disabled
to enable a configuration change in the Bandwidth parameter.
If the Diversity Mode is set to Fourth Order Diversity, the Downlink (Tx)
Frequency and Admin Status of Channels 2-4 are not configurable: they are set
automatically to the same values configured for Channel 1. The Tx Power of the
ODUs associated with Channels 2-4 will be forced to the value configured for the
ODU associated with Channel 1.
If the Diversity Mode is set to Second Order Diversity, the Downlink (Tx)
Frequency and Admin Status of Channel 2 are not configurable: they are set
automatically to the same values configured for Channel 1. The Tx Power of the
ODU associated with Channel 2 will be forced to the value configured for the ODU
associated with Channel 1. Channels 3 and 4 are not used in Second Order
Diversity Mode.
The Show menu includes also the following read-only parameters:
Tx Power: The Tx Power of the Associated ODU. If the actual value differs from
the configured one, both values will be displayed (starting with the configured
value).