DCN%20Wireless%20Technology

1
DCN Wireless Technology
RS232
Control PC
DCN Wireless CCU
WAP
Interpreter Desk
Interpreter Desk
Wireless Discussion
Wireless Discussion
Interpreter Desk
Wireless Discussion
2
DCN Wireless Technology

• Based on WiFi technology (802.11g)
• The 802.11g specification is a standard for
  wireless local area networks that offers
  transmission over relatively short distances at
  up to 54 megabits per second
• 802.11g operate at radio frequencies between
  2.400 Ghz and 2.4835 GHz
• In DCN Wireless there are 3 non overlapping
  carriers available.
• Modulation method used is Orthogonal Frequency
  Division Multiplexing (OFDM)

2.412 - 2.417 - 2.422 - 2.427
- 2.432 - 2.437 - 2.442 - 2.447
- 2.452 - 2.457 - 2.462 - 2.467
- 2.472 -
0
1
2
2.400 -
2.484 -
GHz
GHz
3
Carriers Channels

• In the 2.4 GHz frequency range there are up to 13
  channels available for wireless communication.
• In DCN Wireless the following is applicable
• Carrier 0 Channel 1
• Carrier 1 Channel 6
• Carrier 2 Channel 11

Ch 1 2.412 - Ch 2 2.417 - Ch
3 2.422 - Ch 4 2.427 - Ch 5 2.432 - Ch
6 2.437 - Ch 7 2.442 - Ch 8 2.447 - Ch
9 2.452 - Ch 10 2.457 - Ch 11 2.462 - Ch
12 2.467 - Ch 13 2.472 -
0
1
2
2.400 -
2.484 -
GHz
GHz
4
Carriers Channels

• You must make sure that adjacent wireless
  computer networks do not use the same frequency
  range as the wireless network of the DCN.

Ch 1 2.412 - Ch 2 2.417 - Ch
3 2.422 - Ch 4 2.427 - Ch 5 2.432 - Ch
6 2.437 - Ch 7 2.442 - Ch 8 2.447 - Ch
9 2.452 - Ch 10 2.457 - Ch 11 2.462 - Ch
12 2.467 - Ch 13 2.472 -
0
1
2
WLAN
2.400 -
2.484 -
GHz
GHz

• In this example there is a Wireless Lan network
  which is using channel 3.
• Carriers 0 and 1 have an overlap with this
  channel. Therefore Carrier 2 must be used for DCN
  Wireless.

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Carriers Channels
Ch 1 2.412 - Ch 2 2.417 - Ch
3 2.422 - Ch 4 2.427 - Ch 5 2.432 - Ch
6 2.437 - Ch 7 2.442 - Ch 8 2.447 - Ch
9 2.452 - Ch 10 2.457 - Ch 11 2.462 - Ch
12 2.467 - Ch 13 2.472 -
0
1
2
WLAN
2.400 -
2.484 -
GHz
GHz

• In this example there is a Wireless Lan network
  which is using channel 6.
• Carriers 1 is using the same channel. Therefore
  Carriers 0 and 2 can be used for DCN Wireless.

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DCN Wireless Audio Channels

• Capacity
• Audio uplink channels 4
• Audio downlink channels 2
• Quality
• Frequency characteristics 30 Hz - 20 kHz -3dB
  at nominal level
• Harmonic distortion lt 0.5 at 1kHz at -3dB
  of the max. input level
• Signal-to-noise ratio gt 89 dBA at max.
  output level
• Crosstalk attenuation gt 85 dB at 1kHz at
  max. output level
• Dynamic range gt 85 dB

IU Instructions
7
DCN Wireless Technology

• End of section