Denso BHT-7500S User Manual

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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