User Manual

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2.2 Operational Overview
The quick start demonstration presented in this chapter is referred to as the
ping pong test. The ping pong test allows an end user to easily verify
communication between two transceivers and get a feel for the quality of the
link via feedback of the flashing LEDs.
Operation involves two boards, with one designated as a master device and
the other as a slave device. The master periodically transmits packets to the
slave. If the slave receives and verifies the packet, it will flash its LEDs and
transmit an acknowledgement to the master. If the master receives and
verifies the acknowledgement, it will flash its LEDs.
In normal ping pong mode, LEDs indicate signal strength (two LEDs on
indicate high signal strength, one LED indicates low signal strength). If the
LEDs do not light, the packet or acknowledgement was not received.
2.2.1 Power Up
Insert batteries into interface boards and verify that battery supply is selected
using the jumper as shown in Figure 3-2 chapter 3.
2.2.2 Master/Slave Selection
Master device setup:
1. Press white reset button on Interface Board (See Figure 3-1 location
3) and black button on FreeStar module simultaneously.
2. Release reset button on Interface Module.
3. Wait until green LED is lit, then release button on FreeStar module
Slave device setup:
1. Press white reset button on Interface Board (See Figure 3-1 location
3) and black button on FreeStar module simultaneously.
2. Release reset button on Interface Module
3. Quickly release the button on FreeStar module (Release within 1.5
seconds of performing step 2 above).
2.2.3 Association Mode
In association mode, the red LED will flash rapidly on each board until it has
linked with the other device. At this point, the red LED will go out and the
green LED will begin to flash rapidly for approximately two seconds.
Association mode lasts up to thirty seconds after power up, so the master
and slave pair should be powered up at relatively the same time. If the
transceivers link, they will enter the ping pong mode after association mode
times out. However, if they do not link, they will not communicate and the
sequence must be repeated from the point of master/slave selection at
power up.