User's Manual

FreeWave Technologies Spread Spectrum Transceiver User Manual
900 MHz and 2.4 GHz
V5.0S
53
Diagram (C) shows a link with two repeaters between the master and slave. With
two repeaters there is clearly more flexibility in getting around obstacles and
greater total range is possible. Once again, it would be desirable to use external
omnidirectional antennas with the repeaters, and attaching a Yagi to the master
and slave would increase the range of the link.
When two repeaters are used there is no further degradation in the RF speed of
the link.
Master
Repeater
Repeater
Slave
(C)
In example (D) a setup is shown where a master routinely calls a number of
slaves at different times. The master is communicating with a transceiver
designated as a slave/repeater which is connected to a remote instrument in the
field. Since this instrument is placed in an elevated location, the transceiver may
also be used as a repeater when it is not used as a slave. At any time desirable
the master may call any of the slaves, establish a connection, and retrieve and
send data.
Slave /
Repeater
Slave
Master
Slave
Repeater
Slave
(D)