Mobilicom ltd. MSH-10 ユーザーズマニュアル
User Manual
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7
PTP (Point-to-Point)
A PTP network is a radio link between 2 SkyHopper Pro units. The configuration (frequency and
profile) of both units must be the same with only one difference - one unit is configured as a Remote
Unit while the other unit is configured as a Controller Unit.
profile) of both units must be the same with only one difference - one unit is configured as a Remote
Unit while the other unit is configured as a Controller Unit.
The Remote Unit works with its internal clock and synchronizes the Controller Unit. After power-up,
the Remote Unit starts transmitting regardless of link status. The Controller Unit however, does not
transmit and stays in Rx mode, trying to acquire synchronization by finding a preamble
(synchronization pattern). As soon as the Controller Unit recognizes the pattern, it starts to transmit
according to its allocated time slot.
the Remote Unit starts transmitting regardless of link status. The Controller Unit however, does not
transmit and stays in Rx mode, trying to acquire synchronization by finding a preamble
(synchronization pattern). As soon as the Controller Unit recognizes the pattern, it starts to transmit
according to its allocated time slot.
The transmission bandwidth ratio is predefined as part of the profile configuration. It can be
symmetric when full duplex communications are required (50% to each unit) or asymmetric up to
10% to one unit (remote or controller) and 90% to the other unit.
symmetric when full duplex communications are required (50% to each unit) or asymmetric up to
10% to one unit (remote or controller) and 90% to the other unit.
Figure 5: Transmit frames of the remote unit and controller unit from Power Up
Note: A viewer unit acts like a Controller unit but with one major change, it does not transmit and
only receives.
Remote Unit
Controller Unit