User's Manual

Page 18 FRH-SD07TU/TB Manual
3.1 Operat ion Modes
FRH-SD07TU/TB modem can operate in one of four primary operation modes. Select the
mode that best suits your specific application. The default setting is Mode 3. Mode 1 and 2
are the modes perform on the other FRH series modem.
Mode Protocol Function
3 Modem
4 Repeater
5
packet
transmission
6 direct transmission
Modem
Table 3–1: FRH Operation Modes
3.1.1 Mode 3 – Pa cke t T ra nsmission Mode
• In Mode 3, the FRH-SD07TU/TB modem communicates in packet transmission
mode. Communication parameters are set using the memory registers.
• Mode 3 is generally used for 1:n and n:m wireless network topology and for applications
in which the volume of data is relatively small and changing the destination station
occurs frequently.
3.1.2 M ode 4 – Repeate r Mode
• In Mode 4, the FRH-SD07TU/TB modem operates as a repeater in packet
transmission mode. All modem and communication parameters are controlled through
the modem’s internal memory registers.
• Mode 4 is used to extend the effective communication range in a topology using Mode 3.
3.1.3 Mode 5 – Hea de rless Pack et Transm ission N orma l Mode
• Mode 5, a special mode in packet transmission mode, is used by no transmission
command required in Mode 3 and enable transmission only by the direct data input.
• Mode 5 is generally used for 1:n wireless network topology and for applications in
which the volume of data is relatively small and changing the destination station from
among the receiver modems occurs infrequently. Since no transmission command is
required, the development of upper layer application program becomes easier.
• The operation method of Mode 5 is quite different from that of Mode 3 and Mode 4.
For details, refer to p.118 HEADERLESS PACKET TRANSMISSION MODE
.
Rev. 050415-01.1