Specifications

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17.1 Overview
■ Spread spectrum communications device
The BHT system consists of BHT main system and the spread spectrum communications
device; the former executes user programs and the latter performs spread spectrum communi-
cations.
User programs use the logical device file (named "COM3") to control the spread spectrum
communications device.
■
Spread spectrum communications method
The BHT uses the TCP/IP protocol subset over the spread spectrum communications device.
For details about programming for spread spectrum communication, refer to Chapter 18, "TCP/
IP."
■
Configuration of spread spectrum system
Shown below is an example of the spread spectrum system configuration using the BHT. For
details, refer to the BHT User’s Manual.
Spread spectrum
communications
device
Main system
User programs
(written in BHT-BASIC)
Logical device
file
BHT with a spread spectrum wireless block
Ethernet 10BASE-T
BHT (station)
Domain: 0
Security ID: DENSO
Host computer
Access point (master)
Domain: 0
Security ID: DENSO
Channel: 1
Sub channel: 1
BHT (station)
Domain: 0
Security ID: DENSO
Roaming function
BHT (station)
Domain: 0
Security ID: DENSO
Wireless board
connection
Wireless card
connection
Access point
(master)
Domain: 0
Security ID: DENSO
Channel: 2
Sub channel: 1
BHT (station)
Domain: 0
Security ID: DENSO
7
ABC
9
GHI
8
DEF
1
STU
3
＋
YZ
2
V W X
0
ENT
4
JKL
6
P Q R
5
M N O
PWBS C SF
M1 M2
,
／
7
ABC
9
GHI
8
DEF
1
STU
3
＋
YZ
2
V W X
0
ENT
4
JKL
6
P Q R
5
M N O
PWBS C SF
M1 M2
,
／
7
ABC
9
GHI
8
DEF
1
STU
3
＋
YZ
2
V W X
0
ENT
4
JKL
6
P Q R
5
M N O
PWBS C SF
M1 M2
,
／
7
ABC
9
GHI
8
DEF
1
STU
3
＋
YZ
2
V W X
0
ENT
4
JKL
6
P Q R
5
M N O
PWBS C SF
M1 M2
,
／