So who is to blame for all of this? Airgo to its credit pushed for spectrum efficiency among the 802.11n standards body as long as it could and tried to lead by example while everyone else was spectrum hogging. While these products are aimed at the home market, they're also sometimes used in a small office environment and these radio jamming characteristics are intermittent (when data is being sent) and difficult to track down. This is a serious problem in the city where town homes and condominiums are right next to each other and it's even a problem for businesses which primarily uses 802.11 b/g. What's crazy is that these products are FCC legal and are being sold on store shelves today. The other products from Broadcom and Marvel weren't quite as devastating to the neighbors, but the damage is still severe. While Airgo's third generation product achieves record breaking throughput, it annihilates any legacy 802.11 b/g product in the vicinity and effectively shuts them down.
I finally got them to admit that there are no such guarantees for actual 802.11n compatibility. When I asked Broadcom's representative if they were guaranteeing future compatibility with 802.11n in writing, I couldn't really get a straight answer and was told that their Draft G product was eventually compatible with 802.11g and that they are using a flexible design that can change if the 802.11n draft standard changes. Broadcom and Atheros feeling the heat from relative newcomer Airgo have put their fiercely competitive past behind them though I'm not sure if this will help if they can't post good throughput versus range numbers against Airgo. Broadcom announced that their Draft N products will interoperate at high speeds with Atheros Draft N products, but the Atheros based products weren't available for testing yet at the time of the review. While the Draft N and Pre N products technically work with each other, it would seem that most of them don't interoperate at the higher speeds. In the second set of tests examining interoperability and interference characteristics on neighboring 802.11g Access Points, the results are alarming. One could also easily quadruple the range on a Cisco Access Point with the right kind of high-powered antenna but that wouldn't be a fair measurement on how good the radio and chipset design is. Note: The results showing the Cisco business-grade 802.11g gear performing so well on range may not be a good test of chipset efficiency since it can use 100 mW of transmit power which may be higher than the consumer gear tested. What the first set of tests reveals is that Airgo's product still beats the "Draft N" competition from Broadcom and Marvell hands down with their third generation MIMO product in range and throughput. Earlier this month, Tim ran a battery of tests on these wannabe 802.11n Wi-Fi products to see if they lived up to the kind of throughput and range being promised by the Wi-Fi vendors.
Our friend Tim Higgins has been at it again testing so called "Draft N" and "Pre N" Wi-Fi gear ( implied compatibility with 802.11n) and he has some very interesting results about the interoperability and interference characteristics of these products. Ok that's not an actual advertisement, but it might as well be one. Also this jammer has no harm to human health.Do you ever get frustrated with your neighbor hogging all the Internet bandwidth on the block? Tired of your neighbor using his Wi-Fi gear on channel 1, 6, or 11 (that's all the possible choices) on the 2.4 GHz spectrum? Well now's your chance to get even! Introducing Draft N and Pre-N Wi-Fi! They might not interoperate at high speeds with each other but they're FCC legal and they're guaranteed to shut your neighbor down or your money back! In the meanwhile, the jammer won’t interfere with other electronic equipment’s operation, thus the safety can be guaranteed. It can cut off WiFi signals within a radius of 1-15 meters(about 10-200 ㎡)， and the jamming range can be adjusted according to given occasions. Facing the continuous development of WIFI standard, this signal jammer is especially designed based on the actual WIFI situation. This WiFi jammer adopts advanced technology. PS: This WiFi signal jammer can only jam router WiFi signals, and doesn’t apply to drones/UAVs 2.4G 5.8G frequencies.
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