ICP DAS USA SST-2450 user manual Applications, Peer to Peer

4.Applications

4.1.Peer to Peer

There are three types of peer to peer operational modes to choose from. The following table outlines the settings information and limitations.

Mode	Description:
	In this mode, the SST-2450 can accept and transmit any signal from the
	device. This mode works by using a sample and rebuild. The SST module
	samples the input signal then converts it into a wave signal technique before
	transmitting it to another SST module. When the other SST module receives
	the wave signal, it transforms the signal back into the original format. The
1	sample rate used is 32kb per second, so the device can’t accept higher
	speed signals. The maximum signal speed is less than 9600 bps. Any data
	format may be need in this mode.
	Setting Limitative: Baud Rate must be 9600bps or below; Full-duplex;
	Asynchronous; One SST-2450 is the Master the other is the Slave.
	This mode simulates the Full-duplex mode. The device can transmit and
	receive signals at the same frequency. The RF processor uses the timer
	controller to simulate Full-duplex. Initially, the module that has been set as
	the master is in transmission mode. After 4ms, it switches to receive mode.
	The slave module is inverse to thus. For example if the master is in
	transmission mode but a signal need to be transmitted by the slave at the
2	same time; the slave will store the signal in it’s buffer and will transmit once
	the master is in the receive mode. In Mode 2, the RF signal will be
	processed by the 8051 CPU so requires the fixed data format to be either N,
	8,1 or E, 8,1.
	Setting Limitative: Full-duplex; Synchronous; One SST-2450 is the Master
	and the other is the Slave.
	This mode simulates the Half-duplex mode. One device will respond when it
	receive a command from another device. This is the only mode which
3	supports a SST-2450 network (refer to page 13). This mode is also requires
	a fixed data format to be either N, 8,1 or E, 8,1.
	Setting Limitative: Half-duplex; Synchronous; Both SST-2450s are slaves.
	Refer to chapter 5 for further setting argument information.

SST-2450 Wireless Modem User’s Manual Ver1.5, Feb /2003, OMH-030-10,---7