
Chapter 17. Spread Spectrum Communication (BHT-7500S only)
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The table below shows the communications status transition as the state of the wireless com-
munications device built in the BHT-7500S changes.
If always being opened, the wireless communications device will consume much power. When
the device is not in use, therefore, close it as soon as possible.
However, it will take several seconds to open the wireless communications device and syn-
chronize it with the master for making communications ready. Frequent opening and closing of
the device will require much time, resulting in slow response. Take into account the application
purposes of user programs when programming.
When the wireless communications device is synchronized with the maser, the BHT-7500S will
display a bar on the LCD as shown below.
Spread spectrum
wireless device
Communication
Open (power on) Impossible
Checking synchronization with
master
Impossible
Synchronization complete Possible
Roaming Impossible if roaming leads to the loss of synchronization
Possible if synchronization with the master is kept
End of roaming Possible
Close (power off) Impossible
A bar will appear if the wireless
communications device is
synchronized with the maser.
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