FUTABA FDL01TU, Instruction Manual

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3.5.2 Frequency Group Operation
The FDL01TU can operate on a
fixed frequency
or on any frequency in a set of
frequency group
.
Multiple FDL01TU systems can be use different
frequency groups
and operate in the
same area without mutual interference between the systems. When the RF environment is
relatively clean, wireless channel links can be made on a fixed, clear frequency (no
interference) by using
Grouping Method A
. In less than ideal RF environments, it is better
to use multiple frequencies method in the
frequency group
(
Grouping Method B
through
G, multi-Access function ). Since the modem searches clear frequency in the group, it
overcomes multipath fading and interference problems and establishes wireless
communications.
On the down side, wireless link establishment delays will become longer when using the
frequency group function
(
multi-access function
) because the additional time is
required for searching the channels in the group with transmitting and receiving the packet
on the both end of the modem. The average connection delay will increase and the number
of systems that can operate independently in the same area will decrease as the number of
frequencies per group increases. Select the best
grouping method for your application.
3.5.3 Grouping Methods
The
frequency grouping method
and
group number
are set using
memory register
REG06 .
Method Group Numbers
Frequencies
per Group
A 0 to 75 1
B 0 to 37 2
C 0 to 24 3
D 0 to 18 4
E 0 to 11 6
F 0 to 8 8
G 0 to 5 12
Table 3–7: Frequency Grouping Methods and Group Numbers