wireless interference

"LT" hath wroth:

The definition if interference is usually "anything exept my radios".

1. Other 802.11b/g wireless devices and hot spots.
2. 2.4GHz cordless phones (various modulation types).
3. High speed point to point links that use proprietary protocols.
4. Microwave ovens.
5. RF excited sulfur lamps by Fusion Lighting (defunct). |
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   Wireless video extensions for security cameras and X10 systems.
6. Wireless mouse and keyboard (mostly using Wireless USB from Cypress semiconductor). |
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   Bluetooth
7. Zigbee
8. Microwave fruit dryers, plastics preheaters, and moisture removers.
9. ISM (Industrial, scientific, medical) devices used in research.
10. Low speed 2.4GHz data links. For example: |
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    WiMax on 2.4 and 5.6GHz. (Clearwire, NextNet)
11. Karlnet protocol based WISP (wireless internet service provider).
12. Ham radio.
13. VoIP 2.4GHz Wi-Fi phones.
14. 2.4GHz vehicle navigation systems.
15. Service distribution from some fiber to the pole providers.
16. Wi-fi connected games. |
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    Digital camera wireless picture transfers.
17. Buses and trains that operated moving wireless hot spots.

Yikes, thanks for the list Jeff, as usual your contribution to this NG is extreme and most helpful. Couple of questions....

- How can I tell if a keyboard/mouse uses the Cypress semi? I'm looking into a Logitech KB/ laser mouse combo.

- I'm buying 900mHz wireless headphones, they're OK right? Thanks LT

"LT" hath wroth:

The driver will have "Cypress Wireless USB" listed in the device list. The chips will look something like this:

will have CYxxxxx as the part numbers. If you can get the FCC ID number off the device, you can look it up on the FCCID database and check the inside photos.

However, I wouldn't worry (much) about interference from WirelessUSB devices (i.e. mice and keyboards). The AFH algorith used in Bluetooth

1.2 and 2.0 is also used for Wireless USB. See the description at:

USB listens before selecting a channel and moves if it hears garbage from 802.11 or Bluetooth.

Yep. No interference to 2.4GHz.

yes*

yes*

big yes

Thomas

*if working in the 2.4GHz area.

Jeff Liebermann wrote in news: snipped-for-privacy@4ax.com:

Clearwire !! Wow. And don't believe the press releases from the owner.