User's Manual Part 2

05-4446A01, Rev. D Mercury Reference Manual 69
In the diagram below, one Remote is configured for static
hopping and will only associate with AP1 because they are
both using Offset 0. The hand-off configured Remote, using
its AP Locations file, may connect to AP1, AP2, or AP3. The
Remote does this by determining the Offset for each AP, then
configuring its radio.
•
Current AP (Remote only)—Shows the name of the AP that
the Remote is trying to associate with. Note that this param-
eter is read-only when
Frequency Mode is set to Hopping
w/Hand-offs.
• TDD Sync Mode (AP only)—Indicates if the Access Point’s trans-
missions should synchronize with the GPS timing. Configure
this parameter to
GPS Required when the AP is configured for
Static Hopping. TDD Sync Mode (Time-Division Duplex) is use-
ful in eliminating same-network interference for multiple-AP
installations. When enabled, all AP transmissions are synchro-
nized using GPS timing information. The result is that no AP
transmits while another is receiving, which prevents AP-to-AP
interference. Changing this parameter requires a radio reboot.
[
Free Run, GPS Required; Free Run] Note: Do not use the Prefer GPS
setting.
• Channel Selection (AP only)—Opens a submenu where you can
specify channel usage.
• External GPS PPS Signal—Indicates whether or not an external
Pulse Per Second (PPS) signal is available. The setting may be
changed by pressing the spacebar after selection of the menu
item. This allows the radio to use the proper timing scheme
when frequency hopping.
•
Advanced Control (Remote only)—Brings up a submenu (see
Figure 3-38) where additional communication parameters may
be set.
AP 1
Pattern A
Offset 0
AP 2
Pattern A
Offset 1
AP 3
Pattern A
Offset 2
RM
Static Hopping
Offset 0
RM
Hopping w/
Hand-offs