In the cities, there are basically wireless networks in places such as roadside restaurants, high-end hotels, shopping malls, and playgrounds. Of course, wireless networks in different environments are also good and bad. If you want to have a good wireless network environment, it must be inseparable with a good router. Nowadays, the router market can be said to be an eye-catcher. What high-end routers are families worth investing in?
This time selected the 4 routers in the market often appear in Aunt Zhang, give everyone some suggestions for purchase.
One. Buying routers need to pay attention to 1. Workmanship, design
An excellent router definitely contains excellent workmanship, which is manifested in shell materials, internal processes, and antennas.
A board - security advanced routing using gold version. Solder paste is more uniform, contact is better, and the cost is three times that of a typical circuit board.
B process - fully automated production line will greatly improve the overall product yield and stability, followed by manual plug-in.
C Crystal - refers to cutting slices from a piece of quartz crystal at a certain azimuth, which is equivalent to the heart of the router and provides the power for network transportation; due to the long work continuity of the router, it may sometimes last for several months. Work, on the crystal oscillator's continuous, stable output system frequency has a clear definition, the frequency error is less than 20 × 106, once it will lead to network data upload and download errors.
In addition, the influence of temperature coefficient, the router PCB itself has heat generation, the temperature is about 30-45 degrees, the natural aging rate of the crystal ten years is 3×106/year, but under the premise of continuous temperature increase, his aging rate Will exceed the design criteria, may be a few months time, the frequency of the crystal has exceeded the accuracy of the design of the circuit requirements! So some routers have been used for a year or so often problems, probably because of the above crystal.
D Shield - The metal can shield the wireless interference. If the shield is trash, it will be affected by other signals and the natural network will be unstable.
2. Internet speed, stability
This is a point that consumers can feel most intuitively, depending on the chip scheme used, the optimization and trade-offs of different manufacturers. But unfortunately the general place to buy the router can not be tried, so we can generally choose according to the brand and word of mouth, the current home is certainly the best net-ware, Asus, Linksys, the middle is the tenda, tp-link these, of course, the better The more basic the more expensive. (Yes, as well as your home's physical bandwidth, 4M's network is unable to run 100M speed)
3 through the wall capacity
The ability to pass through the wall is simply the coverage of the router, depending on whether the router's wireless amplification has PA and LAN.
The PA is a Power Amplifier amplifier, which is the signal amplification for the transmitter circuit.
LAN is a low noise amplifier and is an amplifier with a very low noise figure. Generally used as high-frequency or intermediate-frequency preamplifiers for various types of radio receivers (such as mobile phones, computers, or WiFi in iPADs), and amplifier circuits for high-sensitivity electronic detection devices simply accept signal amplification.
Therefore, in addition to the number of antennas that affect the network environment, more depends on the quality of the PA and LAN. Some merchants deliberately used the number of antennas and large memory & multi-core processors to cheat consumers who did not understand, letting them think that the more antennas, the better the wireless quality.
(The more antennas, the better the effect of passing the wall)
4. Settings
In this regard, domestic smart routers do better, newifi, polar routing, millet settings are very simple, fool operation. Of course, routers of traditional brands are basically following the steps, simplifying the setup.
5. Extended function (plug-in, LAN transmission)
LAN to watch movies, usb to connect webcam to do monitoring, there are more dialing, advertising, and so on.
Asus, Netgear, Cisco Linksys, Apple, and some rising stars tp-link, tenda, and domestic Internet routers.
three. How to choose the right one for yourself1. Low-end routers with low demand for the Internet and many environmental changes. (Of course, there are also enthusiasts renting rooms with thousands of routers, after all, the house can be rented, life can not be rented)
2. Long-term use, too lazy to toss, buy a new house, high-end routers.
IV. Recommended AC1900 Router
Because just renovated the house ~ is very concerned about the choice of router, the previous home is an airport exterme plus 2 airport express bridge, Apple figure a stable, but can not play any new tricks. Generally choose a suitable ac1900 100-150 square house is basically enough, and joint friends to do a few models of the star section of the router, the following to tell you about.
ASUS RT-AC68U
AC68U can be said that one of the earlier AC1900 routers in the world has a classic design and the late Tenda AC15 can be said to follow the Asus completely. Hardware and industry-leading, using Broadcom BCM4708 chip, dual-core Cortex-A9, L1 data cache and instruction cache are 32KB, L2 cache is 256KB, while using DDR3 memory, capacity 256MB. The wireless network part is paired with dual BCM4360, corresponding to 2.4 GHz frequency band network and 5 GHz frequency band network respectively. The BCM4360 chip supports TurboQAM technology, which can increase the theoretical network speed of the 2.4 GHz frequency band from RT-AC66U's 450 Mbps to 600 Mbps. The other is that AC68U has AiRadarbeamforming signal concentration enhancement technology, which is much larger than the coverage of ordinary ordinary routers.
Netgear Nighthawk R7000
Appearance first looks good in the router, the two sides of the stairs hollow heat design. Configuration and AC68U and the next to say D-Link DIR-880L is basically similar, cpu relative to the other two Broadcom B4708A 800MHZ to be slightly better, using the B4709A 1GHZ. In addition, with 128M Flash ROM and 256M RAM operating memory, while the R7000's external antenna using the beam technology, for indoor wireless transmission to provide faster connection speed and better coverage. Of course, Netgear has also made some specific optimizations for games, videos, and mobile internet devices that can quickly expand wireless signals and reduce interference and blind spots.
D-Link DIR-880L
The DIR-800L configuration is also a dead-end 68U and R7000, using the Broadcom BCM4708 chip, with 128M Flash ROM and 512M RAM running memory. If you've been concerned about D-Link's routers before, 880L has abandoned the cylinder upright style that has been used for several generations, instead of lying flat. The panel uses a combination of highlight polishing (fingerprint collector) + checkered matte surface. At the same time, the previously built-in omnidirectional loop antenna design was abandoned and three paddle-type antennas were externally mounted. The price of DIR-880L is slightly cheaper in AC1900, and the firmware is relatively simple.
Linksys WRT1900AC
Cisco can be said to be a giant enterprise in the network area. Linksys was once Cisco's home sub-brand. Linksys was sold to Belkin due to the rise of low-end manufacturers. The WRT1900AC changed the design of the EA series and returned to the classic Linksys blue and black. The configuration is relatively non-mainstream compared to the previous ones. The 1.2GHz dual-core Marvell Armada MV78230 is used. The Marvell88W8864 chipset corresponds to the 2.4GHz band network and the 5GHz band network respectively. The other is with 128M Flash ROM and 256M RAM running memory, a particularly good point of the official completely open source, the system wants to brush how to brush.
The test method we used was a desktop computer, a laptop, and a tested router. The desktop computer acts as a host, and then we plug an 802.11ac usb wireless receiver into the notebook to act as a full-time receiver. The device we use is the Netgear A6210 wifi adapter, which adopts a 300m+867m speed solution and concurrent dual-band operation while working at 2.4Ghz/5Ghz to make the test more fair and just.
5G test
For these high-end AC1900 routers, 5GHZ test is very appropriate and fair, but also consider the practical skills of a router.
On the upside, in the range of 2m to 13m, WRT1900AC can be said to be a roller compaction advantage (expensive and expensive), and the other three routers can be said to be unequivocal. At a distance of 17m, the transmission rates of D-LINK, WRT, and R7000 dropped almost 35%; while the AC68U remained at a rate of about 3/4, it was very stable.
In the downside, personally feel that Nighthawk R7000 performs best, especially in the range of 2m-13m. For some enthusiasts, 2m-13m can be said to be the most commonly used distance, such as routers in the living room, TV, mobile phones and PS4 games. Machines can be used, it seems that netgear is streaming media, the game really has special optimization and enhancement, especially in the distance of 13m, the wireless speed has reached 173Mbps. ASUS’s AC68U is still balanced, with the distance gradually decreasing, 17m is the highest, D-link is falling to the end.
Router function (official firmware)
The QoS control here should focus on mentioning that although all four routers support QoS, what difference does ASUS and Netware support for dynamic QoS?
Dynamic QoS does not require manual intervention. The router will first test and determine your bandwidth and overall network environment. Next is to intelligently determine the device's priority, so that the bandwidth of each device is balanced, that is, you play the game, the wife watch TV shows no problem. (Think of a previous roommate who had a roommate who often liked to shoot movies under the Thunder. We were painfully dead when we played the game. Thanks to the nation for fighting Thunder offline.)
NETGEAR's dynamic QoS setting interface will first be tested by SpeedTest to the home network.
Of course, the functions listed above are based on the official firmware. Interested users can obtain more functions by using their own firmware, such as the famous Meilin firmware. Of course, the stability is still the best official.
Synthesis
In general, personally recommend ASUS 68U and R7000 nets , can be said to have their own characteristics, 68U can be said to be a stable user, suitable for not tossing, but also more suitable for business users. The Netgear R7000 can be said to be an age-appropriate router for entertainment, especially for the downlink, the R7000 can be said to be a monster version in the public AC1900 router. WRT1900AC, all aspects can be said to be good, but the price is high, not bad money. In D-Link's words, it is always felt that all aspects do not work, and it is not recommended to buy.
Thank you all~
APM DC Source System is designed to meet customer`s high power/voltage/current command. User can quickly and easily operate the DC Power Supply with its rotary knobs and buttons. Besides, free monitoring software for you to remote control the adjustable dc power supply.This series is applicable to multiple sectors such as electric, lighting and aviation sectors and it could be applied to enterprise's production test as well.
Some features as below:
- With accurate voltage and current measurement capability.
- Coded Knob, multifunctional keyboard.
- Standard RS232/RS485/USB/LAN communication interfaces, GPIB is optional.
- Remote sensing line voltage drop compensation.
- Equips with LIST waveform editing function.
- Use the Standard Commands for Programmable Instrumentation(SCPI) communication protocol.
- Have obtained CE certification.
600V DC Source System,DC Telecom System,DC Source,600V Dc Power Source
APM Technologies Ltd , https://www.apmpowersupply.com