BLUETOOTH
B548 42
SM
4.5 BLUETOOTH
4.5.1 SPECIFICATIONS
Bluetooth wireless provides radio links between mobile computers, mobile phones
and other portable handheld devices.
Bluetooth contains the following features.
•
Cheaper compared to the IEEE802.11b wireless LAN.
•
Many protocols for infrared transmission (IrDA) can be used with Bluetooth.
•
A Bluetooth device can connect to other Bluetooth devices without any settings.
Standard applied:
Bluetooth 1.1 (Bluetooth Special Interest Group)
Data transfer rates:
1 Mbps
Bandwidth:
2.4GHz
Frequency
Hopping Spread Spectrum (FHSS)
Piconet
. Bluetooth devices communicate with each other device in the ad hoc
mode. This network is called a "Piconet”. A Piconet may contain a maximum of 8
Bluetooth devices.
There is one master device and seven slave devices in a Piconet. The master
device controls the hopping frequency and timing, as well as storing the ID codes
of the slave devices. The master and slave devices can be swapped. Once the
master device leaves the Piconet, a slave device becomes the new master.
Machines with the Bluetooth option become potential slave devices to connect to
the PC.
FHSS (Frequency Hopping Spread Spectrum).
The Bluetooth device divides
2402 to 2480 MHz into 79 channels of 1 MHz width, and changes the channel 1600
times per second. If other devices in the LAN are using the same radio band,
Bluetooth can avoid interference from the other devices.
G081D925.WMF
Time
Channel 1
Channel 2
Channel 3
F
requency
Содержание B079
Страница 1: ...B079 B082 SERVICE MANUAL 001634MIU RICOH GROUP COMPANIES ...
Страница 2: ......
Страница 3: ...B079 B082 SERVICE MANUAL RICOH GROUP COMPANIES ...
Страница 4: ......
Страница 5: ...B079 B082 SERVICE MANUAL 001634MIU ...
Страница 6: ......
Страница 8: ......
Страница 10: ......
Страница 12: ......
Страница 26: ......
Страница 28: ......
Страница 29: ...INSTALLATION ...
Страница 30: ......
Страница 101: ...PREVENTIVE MAINTENANCE ...
Страница 102: ......
Страница 107: ...REPLACEMENT AND ADJUSTMENT ...
Страница 108: ......
Страница 196: ......
Страница 197: ...TROUBLESHOOTING ...
Страница 198: ......
Страница 221: ...Trouble shooting SERVICE CALL CONDITIONS SM 4 23 B079 B082 INTENTIONALLY LEFT BLANK ...
Страница 225: ...SERVICE TABLES ...
Страница 226: ......
Страница 330: ......
Страница 331: ...DETAILED SECTION DESCRIPTIONS ...
Страница 332: ......
Страница 436: ......
Страница 437: ...SPECIFICATIONS ...
Страница 438: ......
Страница 448: ......
Страница 449: ...BOOKLET FINISHER B546 ...
Страница 450: ......
Страница 497: ...AUTO REVERSE DOCUMENT FEEDER B541 ...
Страница 498: ......
Страница 525: ...LARGE CAPACITY TRAY B543 ...
Страница 526: ......
Страница 528: ......
Страница 543: ...PAPER TRAY UNIT B542 ...
Страница 544: ......
Страница 546: ......
Страница 565: ...1 BIN TRAY B544 ...
Страница 566: ......
Страница 568: ......
Страница 576: ......
Страница 577: ...1000 SHEET FINISHER B408 ...
Страница 578: ......
Страница 580: ......
Страница 605: ...TWO TRAY FINISHER B545 ...
Страница 606: ......
Страница 643: ...BRIDGE UNIT B538 ...
Страница 651: ...PRINTER OPTION B548 ...
Страница 652: ......
Страница 703: ...FAX OPTION B547 ...
Страница 704: ......
Страница 708: ......
Страница 851: ...TECHNICAL SERVICE BULLETINS ...
Страница 853: ...BRIDGE UNIT B538 ...
Страница 908: ...Trouble shooting SERVICE CALL CONDITIONS SM 4 23 B079 B082 INTENTIONALLY LEFT BLANK ...
Страница 941: ...FIRMWARE HISTORY ...