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Chapter 3. Communications Operations of the BHT
Chapter 3
Communications Operations of the BHT
This chapter describes the communications operations of the BHT-7500/7500S/7500W—
the spread-spectrum communication (for BHT-7500S/7500W only), IR communication,
RS-232C interface specifications, the basic communications specifications, and the
communications protocols—for data transfer with the host computer or other devices.
3.1 Spread-Spectrum Communication (BHT-7500S/7500W only)............................ 124
3.1.1 Notes for Wireless Operations ...................................................................... 124
3.1.2 RF-Related Parameters................................................................................... 124
3.2 Infrared Communication ....................................................................................... 126
3.3 RS-232C Interface Specifications.......................................................................... 127
[ 1 ] Interface Connector and Pin Assignment ............................................. 127
[ 2 ] Interface Cable Connection .................................................................... 128
3.4 Basic Communications Specifications and Parameters ..................................... 129
3.4.1 Basic Communications Specifications.......................................................... 129
3.4.2 Communications Parameters ........................................................................ 131
3.5 Communications Protocols................................................................................... 132
3.5.1 BHT-protocol ................................................................................................... 132
[ 1 ] Overview .................................................................................................. 132
[ 2 ] Control Characters .................................................................................. 133
[ 3 ] Basic Format of Transmission Messages.............................................. 135
[ 4 ] Text Format.............................................................................................. 136
3.5.2 BHT-Ir Protocol................................................................................................ 138
[ 1 ] Overview .................................................................................................. 138
[ 2 ] Control Characters .................................................................................. 139
[ 3 ] Basic Format of Transmission Messages.............................................. 141
[ 4 ] Text Format.............................................................................................. 142