User's Manual

MCW-D 50 – Trouble Shooting
50
9.1.2 MCW-D and WLAN or WiFi
Like WLAN, the MCW-D 50 system uses the same bandwidth of approx. 22 MHz for each RF channel (Low, Mid, High). This results in three
compatible RF channels in the 2.4 GHz-ISM band. These are theoretically:
Compatible channel 1: 2400 MHz - 2428 MHz (theoretical mid frequency: 2414 MHz)
Compatible channel 2: 2428 MHz - 2456 MHz (theoretical mid frequency: 2442 MHz)
Compatible channel 3: 2456 MHz - 2484 MHz (theoretical mid frequency: 2470 MHz)
The MCW-D 50 system uses RF channels (Low, Mid, High) compatible to each other. For WLAN the user has to configure compatible
RF channels.
Frequencies MCW-D 50 / WLAN
MCW-D 50 WLAN
Channel . . . . . . . . . . . . . . . . . . Centre frequency Channel . . . . . . . . . . . . . . . . . . Centre frequency
Low . . . . . . . . . . . . . . . . . . . . . . 2412 MHz 1 . . . . . . . . . . . . . . . . . . . . . . . . 2412
2 . . . . . . . . . . . . . . . . . . . . . . . . 2417
3 . . . . . . . . . . . . . . . . . . . . . . . . 2422
4 . . . . . . . . . . . . . . . . . . . . . . . . 2427
5 . . . . . . . . . . . . . . . . . . . . . . . . 2432
Mid . . . . . . . . . . . . . . . . . . . . . . 2438 MHz 6 . . . . . . . . . . . . . . . . . . . . . . . . 2437
7 . . . . . . . . . . . . . . . . . . . . . . . . 2442
8 . . . . . . . . . . . . . . . . . . . . . . . . 2447
9 . . . . . . . . . . . . . . . . . . . . . . . . 2452
10 . . . . . . . . . . . . . . . . . . . . . . . 2457
High . . . . . . . . . . . . . . . . . . . . . 2464 MHz 11 . . . . . . . . . . . . . . . . . . . . . . . 2462
12 . . . . . . . . . . . . . . . . . . . . . . . 2467
13 . . . . . . . . . . . . . . . . . . . . . . . 2472
14 . . . . . . . . . . . . . . . . . . . . . . . 2484
You can easily recognise that the individual WLAN channels overlap considerably due to their bandwidth. All neighbouring channels
(e.g. channel 1 & 2 or channel 7 & 8) cannot be used simultaneously, because they would disturb each other. Furthermore, channel 12 and
13 are not approved for the use in the USA. In general, these channels are not used either. Within the remaining frequency bands only the
WLAN channels 1, 6 and 11 can be used simultaneously.
For this reason the WLAN channels 1, 6 and 11 were selected for the RF channels Low, Mid and High used for the MCW-D 50 discussion
system. Due to this frequency compatibility the MCW-D 50 system is operated WLAN-friendly.
Due to careful frequency planning it is possible to operate one MCW-D 50-3 control unit with more than 4,000 microphone units and a
maximum of two WLAN devices nearby simultaneously.
More tips for installation
• Keep a minimum distance of approx. 5 m between WLAN devices (e.g. Router, Repeater) and the transmitting and receiving antennae of
the MCW-D 50 control unit.
• The distance between laptops with activated WLAN interface does not influence the audio transmission of the microphone units as long
as there is no active data traffic.
• We recommend using different RF channels for WLAN or WiFi and MCW-D 50 channels. The distance between the WLAN and
MCW-D 50 channels should be as large as possible.
• The channels of the MCW-D 50 discussion system can be selected with the supplied MCW-D 50 Conference Software.
9.1.3 MCW-D 50 and Bluetooth
• Bluetooth devices make use of the whole 2.4 GHz range with changing carrier frequencies (frequency hopping).
• Interferences caused by Bluetooth devices (including microwave ovens) in normal operation can be excluded due to different measures
inside the MCW-D 50 system and an advanced transmission protocol.
• It cannot be excluded, however, that an exisisting Bluetooth data traffic will be intefered by MCW-D 50.
2400 MHz Low Mid High 2484 MHz
Frequency /
MHz