qam antenna

, or when there is an obstacle, the distance should not be too long. If you really need it, you can set up a relay station in the middle to bypass the obstacle. During WLAN close-range transmission, in order to obtain the maximum bandwidth, you can connect the wireless bridge to a router that supports redundant channels, so that three wireless bridges can be integrated together, in addition, the antenna height is basically unaffected. Most WLAN device

it. The following describes the test results. First said equipment: linksys54gc-cn original 2DB antenna), dell410 comes with Intel pro/wireless 2200BG wireless network card Test environment of linksys for wireless routing: the small duplex building on the second floor of my house, which is about 120 square meters ). The route is placed on the computer chassis of the Study on the second floor of my house, and all the room doors are closed. The test lo

. for the radar antenna that comes with the card Emperor (targeted antenna, I am no longer capable of spitting out the slot, the shape is not feeling, and the radiation should not be small, every time I plug in, in a short time, my head will be dizzy. Obviously, it is estimated that the 18db in the box is not that high. however, all sorts of disgusting feelings force the brain. so I changed the radar-target

December 31, 2013, Shenzhen-on World Telecommunication Day (December 31, May 17, the "2013 Shenzhen terminal Radio Frequency Technology Seminar" sponsored by microwave radio frequency network, an industry portal website focusing on microwave, RF, and wireless technology, was successfully held at the default Hotel in Bolin, Shenzhen. This seminar will focus on the hardware design and testing technical difficulties and hot spots of next-generation LTE (4G) smartphones and 802.11ac (5g WiFi) wirele

can support a wide range of wireless network adapters, we recommend using a prism 2 Chip-based network adapter, this chip can be supported by all the tools we need to use during the cracking process. Wireless NICs generally have two types of antennas: External antennas and built-in antennas. If the purchased wireless NICs do not have built-in antennas, you must purchase another one. However, the advantage of an external antenna is higher gain and bet

CDMA networks, because the system uses Code division multiple access technology, all users use the same frequency band, mutual use of unrelated PN code as a spread code to differentiate, because of this feature, the existence of the same frequency interference is inevitable; at the same time, the amount of interference depends on the number of telephone users, the system capacity also changes (that is, soft capacity). From the subjective aspect, the main reasons for the same frequency interfer

is directly output to the multipleer without the video server. C. Video Server The video server uses a large array disk to store audio and video streaming files, effectively manage the program editing process and material library, prepare program series orders, and broadcast multiple programs through the broadcast control platform. 　　　　 D. DTS The multi-channel MPEG-2 data transmission stream (SP, single-program TS) from the video server and real-time Encoding Equipment is reused as one-way t

the points, the information extraction will not be affected. The data transmission rate of OFDM is also related to the number of subcarriers. Subcarriers In the OFDM system can select modulation modes based on the channel conditions and switch between modulation modes. The principle of selection and switching is the balance between spectrum utilization and bit error rate. In general communication systems, in order to maintain a certain degree of reliability, we choose to adopt the power control

). Troubleshooting: When mixing IEEE 802.11b and IEEE 802.11g wireless devices, be sure to set the wireless AP into a mixed (MIXED) mode, which can be compatible with both IEEE 802.11b and 802.11g two modes. Wireless network connection is not 2: The wireless client is not receiving a signal failure phenomenon: After building a wireless LAN, the client is found not to receive the wireless AP signal. The wireless network has no signal. Failure Analysis: There are several possible causes fo

opportunity to enter the normal standby state, the current in the 5-20ma about a regular change (about a second swing), this time the mobile phone to answerThe receiving part is basically normal;②: If the phone boot after the current is always in the 50-100ma around irregular changes, in about 10 seconds back to 10-20ma, and then a few seconds to jump to 50-100ma around, so repeated, thenIndicates that the receiving part is not working properly.③ if the current in the boot after a motionless (n

with 300Mbps transmission speed. NW335 150M Wireless USB card NW335 is a cost-effective 150Mbps removable antenna USB card, it is widely used in the environment than ordinary USB card wider, product performance is better, is the formation of wireless LAN and extended wireless signal coverage of the excellent terminal equipment. NW352 150M 11N Wireless PCI network card (for desktop exclusive) NW352 is a high specification, strong performance of th

suspected that pilot contamination may exist, the first possibility is that there is not enough protection in pilot planning, and the other may be that the time tolerance of pilot channel of some base stations has a large deviation. For the latter, a transmitter tester can be used to test the potential base station. (Computer science) The user complained to the warning and network management reports that there is a problem with the call, and has ruled out base station and base station day feed

wall blocking between them, especially the reinforced cement wall of the load-bearing wall ). We know that in order to reduce the radiation to the human body, the power of the wireless router is generally not large, so the capacity is subject to interference from nearby electronic devices during use, therefore, when setting the placement of wireless routers, we must remember to stay away from microwave ovens, refrigerators, and other household appliances. A good

interference from nearby electronic devices during use, therefore, when setting the placement of wireless routers, we must remember to stay away from microwave ovens, refrigerators, and other household appliances. A good antenna is also an effective way to ensure the wireless transmission distance and Stability of routers. Some high-end wireless routers use dual antennas, generally, multi-antenna products

Why do we need to close the network line?The key to ensuring the security of wireless access points is to prohibit unauthorized users from accessing the network. That is to say, a secure access point is disabled for unauthorized users. Ensuring the security of wireless networks is much more difficult than ensuring the security of wired networks. Because the wired network only has a limited number of fixed access points, and the wireless network can be connected from any point in the range permit

place the antenna in a relatively large area, and the distance from the battery is also far enough. HW also requires the id not to place any gold accessories near the antenna. We can imagine that the manufacturing cost of a mobile phone with a built-in antenna is 20-25% more expensive than that of a mobile phone with an external

communication protocol operation. The MAC address is expressed in three bits, that is, eight devices can be addressable in one micro-network (the number of connected devices is actually unlimited, but only eight devices can be activated at the same time, one of them is primary, and seven are slave ). Figure 1 shows the topology of a Master/Slave Device in the micro-network. In addition, the Bluetooth system supports point-to-point communication to form a distributed network, that is, one master

power of the wireless router is generally not large, so the capacity is subject to interference from nearby electronic devices during use, therefore, when setting the placement of wireless routers, we must remember to stay away from microwave ovens, refrigerators, and other household appliances. A good antenna is also an effective way to ensure the wireless transmission distance and Stability of routers. Some high-end wireless routers use dual antenn

than ensuring the security of wired networks. Because the wired network only has a limited number of fixed access points, and the wireless network can be connected from any point in the range permitted by the antenna. Design antenna placement The first step to keep the Wireless Access Point Closed is to place the antenna correctly, so as to limit the semaphores

will not be noticed. Tips 3: Search for antennas and crack the network In this way, you need to pay a certain amount of money to purchase a "strong search antenna", but the effect is "immediate" and very effective. This kind of powerful search antenna is actually the "secondary network card" mentioned at the beginning of this article. The price of this kind of equipment is between-RMB. Its principle is ver