Operating Modes; Master; Repeater; Remote - Cal Amp Phantom II Operating Manual

Phantom II

4.0 Operating Modes

A Phantom II may be configured for any operating mode. This is very
convenient for purposes of sparing and becoming familiar with their
configuration menus.

4.1 Master

One per network, the source of synchronization for the system. The
Master controls the flow of data through the system.

4.2 Repeater

Required only if necessary to establish a radio path between a
Master and Remote(s); stores and forwards the data sent to it.
Synchronizes to Master and provides synchronization to
'downstream' units.
If a local device is attached to a Repeater's serial data port, the
Repeater will also behave as a Remote (aka Repeater/Remote).
As they are added to a radio network it is good practice to use the
values 2-17, sequentially, for Repeater Unit Addresses.
Adding one or more Repeaters within a network will HALVE the
throughput; the throughput is halved only once, i.e. it does not
decrease with the addition of more Repeaters.
If there is a 'radio (signal) path' requirement to provide Repeater
functionality, but throughput is critical, the repeating function may be
accomplished by placing two Phantom II modems at the Repeater
site in a 'back-to-back' configuration. One Phantom II would be
configured as a Remote in the 'upstream' network; the other a
Master in the 'downstream' network. Local connection between the
modems would be accomplished with a crossover cable (for the
Ethernet connection). Each modem would require its own antenna;
careful consideration should be given with respect to antenna
placement and Phantom II configuration.

4.3 Remote

Endpoint/node within a network to which a local device is attached.
Communicates with Master either directly or through one or more
Repeaters. See Sections 5.3 and 5.4 for information regarding
'Remote-to-Remote' communications.
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