GE MDS Mercury Series, Справочное руководство

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62 Mercury Reference Manual 05-4446A01, Rev. C
•
RF Bandwidth
—View/set the radio’s RF operating bandwidth.
Radios are factory-configured for either 1.75 MHz or 3.5 MHz
maximum bandwidth. Determine the factory configuration of a
radio by viewing the “CONFIG” number on the label at the bot-
tom of the radio. 1.75 MHz units will have a Configuration
string starting with
HGA/R9N1
, and 3.5 MHz units will have a
string starting with
HGA/R9N3
.
The bandwidth setting on this menu does not necessarily have
to match the configured bandwidth of the radio, but it is limited
by it. That is, you can set a 3.5 MHz radio to either 1.75 or 3.5,
but you can only set a 1.75 MHz radio to 1.75. Note that setting
a 3.5 MHz bandwidth radio to operate at 1.75 MHz bandwidth
will cause a slight degradation of interference rejection capabil-
ity. [
1.75MHz, 3.5MHz
]
•
Hop Pattern
—Selects a pre-defined series of channels that is fol-
lowed when hopping.
•
Hop Pattern Offset
—Inserts an offset into the hop pattern that is
synchronized with the GPS. For example, if the offset is 0, then
the start of the pattern is aligned with the GPS timing. If the off-
set is 3, then the fourth hop of the pattern is aligned with the
GPS timing. All of the APs that are part of a network should use
the same pattern and each one should have its own offset.
In the diagram below, one Remote is configured for static hop-
ping and will only associate with AP1 because they are both
10 921.400000
11 923.400000
12 925.200000
13 927.000000
Table 3-1. Channel/Frequency Allocations
Channel 1.75 MHz B/W 3.5 MHz B/W