Additional parameters of WiFi adapters. How to strengthen the WiFi signal using the hardware method? What is it and what is the principle of work

They have this technology as smartphones, laptops and desktop PCs, and refrigerators, televisions and other appliances. Many users use routers to connect their devices to the Internet, they can have a LAN port to connect using a cable, and Wi-Fi adapterto distribute the Internet to other devices that also have Wi-Fi technology. Unfortunately, the wireless signal propagation zone is not very large, and if there are obstacles on the way, it is generally very small. Of course, there are many standards on which the signal strength depends, and an important parameter is the number of antennas.

If you use Wi-Fi technology, but do not know what can be done to strengthen wiFi signal   then this article is for you. Here I will try to explain the hardware and software ways to improve the signal.

But before I start, I want to note one important point.

Pay attention to the location of the router. It would not be bad if it was closer to the middle of the room and the whole house, so that the signal propagated evenly and you were comfortable using the wireless network. The deterioration of the signal can be many factors. At home, these walls, and if it is also concrete, it is much worse to miss the radio waves. Any thing - from a picture, then a picture or a mirror can to some extent worsen reception of a signal. So I want you to try to locate your router so that the signal is available in all areas of the house. If possible, remove things that may interfere.

How to increase the reception of WiFi signal with the help of programs?

Many users are inexperienced leaving the default settings of the router, except that they will change the network name and password. This is not entirely correct and I will now explain why.

Frequency channels coincide with other Wi-Fi networks

If you live in an apartment building, then almost 100% probability that there is a Wi-Fi network that broadcasts on the same channel as you. This phenomenon often interrupts signal reception. In the settings of the router you need to change the channel to a free one or to the one where there are fewer other wireless networks.

See who on what channel is sitting with the help of the program inSSIDer. Download it from here and install it on a PC with a mongrel adapter.

The program window will show the found wireless network, and in the column "Channel"   the channels that they occupy are exposed. In Russia, only thirteen channels are usually used, in other countries either more or less.

We figured out the channels, then we'll start changing the settings of our router. Usually the following addresses are used for this purpose, which must be entered in the address bar of the browser: http://192.168.0.1   or http://192.168.1.1. Next you will be asked to enter your login and password, if you did not change anything, then by default it is admin (and login and password).

You need to find functions related to wireless wi-Fi networks, can be written Wireless. There will necessarily be a section Channels   (Channel), among which you can choose a number from 1 to 13.

Change the channel to free and save. After this action, you will suffer much less from interference and the signal will be more stable.

Low Router Transmitter Signal

By default, in some routers, a small transmitter power can be set. But it can be changed. All in the same router settings, find the parameter Transmission power   (Transmit Power), and set the value to 100%. Or, you need to select a value High   (High).

Of course, this function is not available on all models. Sometimes a special firmware for such models, if any, helps.

The 802.11n standard is faster

In Wi-Fi there are many standards on which a wireless network can work. The fast is, of course, the 802.11n standard, which still gives a larger coverage radius, if several antennas are used. Another thing to consider is the support of this standard by other devices, because if you switch to it, some devices will not detect your network due to a range underexposure.

In the parameters of the router, look for "Operating mode"   or "Wireless network mode", or "Wireless mode"   and switch to 802.11n. For the changes to take effect, restart the router.

Using the 5 GHz band

Using the 802.11n standard makes it possible in expensive models to use two types of band - 2.4 GHz (Used by all devices) and 5 GHz   (Not used by everyone). The 2.4 GHz band is very busy, it uses a lot of devices that surround us and it's not just wireless adapters, and even a microwave oven can create problems for us. The frequency range of 5 GHz is now practically free, therefore it is desirable to transfer all devices to it.

Improving Signal in Windows

At this point, more attention is focused on laptops. The fact is that when you set "Energy Saving" in the power settings, this can affect the power wi-Fi signal. Therefore it is better to expose "Balanced"   mode, or "High performance". Then you will receive the signal from a greater distance.

Who does not know, the power settings are in the following place: we right-click on the battery icon on the taskbar and select "Power supply" and set the necessary control scheme.

Limit the signal power and can it be removed?

It should be noted that all routers have a hard limit of 100 mW power. Of course, in Chinese stores there are adapters that can take a distance of several kilometers, but in ordinary electronics stores you will not find this. Is it possible to increase the signal power programmatically? Answer: In part you can.

Unfortunately, there is some complexity - you need a Linux distribution, for example, Kali Linux, or an equivalent - Backtrack 5r3 whose support has stopped.

The fact is that in most countries the wireless transmitter power is limited to 100 mW, but for Bolivia and some other countries this restriction is not, so in the terminal you need to enter a number of such commands:

In this example wlan0   Is the wireless adapter you are using, and 100   - output power in mW (milliwatt).

How to strengthen the WiFi signal using the hardware method?

All means are good, which means that together with software methods we will be able to achieve a stable and high signal of the transmitter. Even if the software does not work, the following methods may help.

Improvement of the signal by the modernization of antennas

To amplify the Wi-Fi signal on the Internet, I met many ways. For example, people make a directional antenna that works in all directions and for this purpose they use foil or a can of Pepsi or beer. Of course, the use of such methods is doubtful, but for someone like.

More efficient are the more powerful antennas that can be purchased at the store. You need to make sure that your antenna has a factor of 2-3 dBi, then they can be replaced with 8 dBi antennas.

Using a repeater to amplify the reception signal

These devices are called repeaters, and they can greatly increase the coverage area. The repeater connects to your wireless network and increases its scope.

Buying a more powerful Wi-Fi adapter

You can do this: if you have a laptop that does not have strong reception on the wireless adapter, replace it with a more powerful one. This applies to desktop computers. It's best to take an adapter that plugs into USB and has an antenna that you can probably replace with a more powerful one.http: //site/wp-content/uploads/2017/02/kak-usilit-signal-wifi-7-700x384.jpghttp: //site/wp-content/uploads/2017/02/kak-usilit-signal-wifi-7-150x150.jpg   2017-02-01T19: 47: 18 + 00: 00 EvilSin225Wi-Fi wi-fi, Wi-Fi standard, how to amplify the signal wifi, amplify wi-fiIt is no longer possible to count the amount of technology in which the Wi-Fi module is built-in. They have this technology as smartphones, laptops and desktop PCs, as well as refrigerators, televisions and other household appliances. Many users use routers to connect their devices to the Internet, they can have a LAN port to connect using a cable, so ...EvilSin225 Andrey Terekhov [email protected] Administrator Computer techologies

If you are referred to the question of repairing laptops, but you do not have your own equipment or repair skills - Service Center " LaptopOFF "   offers you cooperation. Despite the fact that our office is located only in Kiev, you can still cooperate with us on repairing laptops, sending them to us by the delivery service "Nova Poshta". In each case, we will be able to advise you on the possible causes   break the laptop before sending it to us and agree on the minimum repair costs.

After the correct application form, which is below, you will be able to use the following bonuses:

* discounts for spare parts (small wholesale)

* Discounts for work (from 10% to 20%)

* deferred payment for orders (purchase of spare parts or repairs of laptops).

These are the main advantages of partnership with us, but not all.

In addition, you will have the opportunity to consult us about the compatibility of spare parts, the alleged causes of laptop breakdowns, the estimated cost of repairs and the deadlines for the execution of work. Moreover, our warranty cases will be considered out of turn, and in cases of impossibility of carrying out warranty repairs, refunds of the full cost of repairs will be carried out. Our warranty stickers do not contain data about our service center, which will save you unnecessary questions. In the case of complex repairs, conditions for exclusive discounts will be considered to maintain the expediency of repair.

We draw your attention that for the correct cooperation on our partnership program and the maintenance of discounts and other bonus conditions, systematic calls are required. More detailed information you will receive after registration of you in the status of a partner.

Please fill in all the fields! Fields marked with an asterisk (*) are required. Thank you!

The warranty in our service center is not just words.

For over 8 years we have been repairing laptops and there have not been a single case that we have not fulfilled our warranty obligations to our customers (exceptions were only when our seals were broken and there were signs of outside interference that led to breakdown). It is worth noting that the warranty cases for our faults are very rare due to the fact that the quality of our work is always high, and the chips are new (in those cases when we have to use the used components we always warn about it and still give a full guarantee ).

For all the works carried out by the Service Center "NotebookOFF" a minimum of 3 months warranty is provided   (unless other conditions are specified at the stage of the repair agreement).

On the replaced chipsets of chipsets(northern and southern bridges)   or video chips - 6 months. Only new chips are used for soldering.

It should be noted that the warranty is provided only for the repaired hardware of the laptop (that is the part of the work that we did). This reservation is made specifically, because in some cases the software can give the same symptoms as a hardware failure, but this will not be a warranty case. This is explained easily by the fact that the duties of our service (and in the list of its services provided) include the elimination of only hardware faults. Naturally, in this case we will demonstrate the correct operation of your laptop on our software, but after that you will have to pay for the diagnostics, since the laptop was functional, but we still worked on diagnosing it. Therefore, immediately advise anyone who is going to contact us with a warranty claim, first of all, to exclude the impact of programs and operating system, and only then complain about the manifestation of the malfunction.

The warranty for spare parts in most cases also leaves 3 months   (except for hard drives, CD-ROM and matrix drives - an extended warranty for 6, 12 and 24 months can be provided for these parts). More details of the warranty period for the goods you can find out from our managers.

And finally. One of our main rules: We never abandon our customers to the mercy of fate!Even if it turns out that in the repeated failure of the user's fault and there are no claims to the quality of the work performed by us or replaced parts, we go to meet and provide exclusive discounts or do something even free of charge.

In addition, our position is that it makes no sense to do poorly, because then you have to redo it for free!And this problem only on our shoulders. First of all, this is the time of our specialists, not to mention the need to change chips, which are often quite expensive. And it's always pleasant when our client calls to us with a request to help him with something new, than with indignation about the fact that the newly renovated one does not work again.

After repair, you receive a check or an act of completed work (in the case of non-cash payment according to the invoice), which indicates which spare parts have been replaced during the repair process and what works were performed. These documents serve as confirmation that you paid the money (check or act), and we did the work. They are needed to confirm the guarantee, if something breaks again. In addition, on the case of the laptop or on the purchased part, we put our warranty sticker, which indicates the expiration date of the warranty.

In the event that during the warranty period the replaced part fails, we make a free replacement of the spare part. If for any reason a second repair is not possible - the full cost of the repair is repaid and the replaced parts are withdrawn.

We will be happy to help you! Please!

When choosing a power supply for a laptop, you should pay attention to its main characteristics:

• Input voltage (110V / 220V);
• Output voltage (V);
• Output current strength (A);
• Type of connector that plugs into the laptop.

Most power adapters make only a few manufacturers, such as LITEON, DELTA, LiShin, AcBel and FSP. Blocks under these brands are the most popular and quality.

Manufacturers of laptops, as a rule, just glue their stickers on power supplies. This is how many notebook manufacturers act: ACER, ASUS, Toshiba, Fujitsu-Siemens, HP, Compaq, DELL, LG, IRU, ROVERBOOK, MSI.

It follows that it is not always necessary to buy the original power supply of the laptop manufacturer, it is cheaper to buy the original power supply unit manufacturer.

To properly select the power supply, you need to determine the output voltage and current. These characteristics are usually indicated on the underside of the notebook.

In general, laptops have an input voltage of 15 to 20 volts. When selecting the voltage, a tolerance of 1-2 volts is allowed. When selecting the amperage, one rule applies - the output current of the power supply should not be less than that required for the notebook. The higher the current strength of the PSU (at the same voltage), the more powerful the power supply is. There is an opinion that a more powerful power supply can spoil the battery of the laptop, but this is misleading, because Ohm's law has not been canceled yet! A more powerful power supply will not spoil the laptop, while it will remain intact and will not work at the limit of its capabilities. A weaker adapter will not spoil the laptop, but it can burn itself. So you need to choose either the corresponding voltage and current strength or more powerful.

The connectors of power supplies are divided into standard ones, having two contacts (voltage and zero) and with the third intelligent output.

Power supplies with standard connector   suitable for such brands of notebooks as Acer, ASUS, MSI, GigaByte, ViewSonic, RoverBook, Toshiba, Fujitsu-Siemens, iRu. Connectors of such PSUs differ in external diameter (mostly 5 and 5.5 mm) and internal diameter (1.6 mm, 2 mm, 2.5 mm). When selecting the adapter, it is necessary that the power connector accurately matches the power socket of the laptop, otherwise you can either break the power connector of the laptop or it will burn out with bad contact. Normally, the internal contact is supplied with the supply voltage (+), the external contact - zero (-). Be careful, reversing contacts leads to burnout motherboard   laptop.

Two-pin types are the power supplies of SONY and SAMSUNG, although they have a central pin, the supply voltage is output to it, and the external contact is zero.

Connectors with three leads are mainly used in the products of DELL and HP.

DELL power supplies have three outputs: + 19V, zero and information (central pin). When the power supply is connected, the notebook reads its power. If the power of the PSU is less than necessary, the laptop will disconnect the charging of the battery.

Exactly the same connector has HP / Compaq power supplies, also the central pin is used to determine the power of the power adapter, but these connectors are electrically incompatible.

Power supplies for laptop DELL and HP are not compatible!

There is one more point to pay attention to. Now power supplies for laptops are sold almost in a bread shop. A variety of proposals amazes imagination, and from the names of firms of manufacturers - the language is plaited.

In addition to the above characteristics, there is one more - QUALITY!

Take the two DELL power supplies.

One of them is the original DELL, the other is not original, they do not have any external differences, and it's very difficult for a non-specialist to distinguish the original from a fake. The specialist can also distinguish the original power supply from the unoriginal weight and quality of the plastic. Differences in weight can easily be explained if you disassemble power supplies.

The original power supply is completely covered by the screen.

In addition, the non-original PSU simplifies the circuit, often there is no protection circuit and additional filters, instead of the elements there are jumpers, and the quality of the soldering simply surprises.

Than such purchase threatens - if will carry, that anything! If you are unlucky, then repair your laptop.

The same filling   many chinese   power supplies of unknown manufacturers. A lot of universal power units are sold with a bunch of voltage switches, reverse polarity and a bunch of connectors and questionable quality.

Qualitative universal power supply units are produced only by serious manufacturers: FSP, LiteOn, AcBel, (manufacturer FSP).

A good power supply for a laptop, it's like quality gasoline for your car, the higher its quality, the less likely a breakdown.

Additional settings for WiFi adapters

To set additional parameters for wireless adapters, select "Properties" wireless adapter   In Device Manager, click the Advanced tab.
  To view the property value, click the property name in the Properties list. The property value is displayed in the Value box. To change the value, click the Value list or type a new value (for different properties, the options vary).
NOTE:   Some properties may not be available for your Wireless Network Adapter model.

802.11h d
With the 802.11h d property, you can configure advanced wireless control of the WLAN card, performed by the associated access point. Controls are enabled when the 802.11h d property is set to "Free 11h", "Free 11h d" or "Strict 11h". If you select "Strict 11h", the Wireless Network Adapter only communicates with access points that support IEEE 802.11h protocols while working in regions that have special radio restrictions. If you select "Free 11h", the WLAN card does not limit communication based on the support for the IEEE 802.11h access point. If you select "Free 11h d", the wireless adapter does not restrict communication based on the support for the IEEE 802.11h access point or IEEE 802.11d.
Values:
  Disabled (default)
  Free 11h
  Free 11h d
  Strict 11h

Afterburner
  Afterburner is Broadcom's high-performance native implementation with higher bandwidth added to wireless products compatible with IEEE 802.11g.
Values:
  Disabled (default). Disabling Afterburner.
  Allowed Afterburner Resolution

Antenna spacing
  Antenna diversity is a function provided in most of the LAN equipment, equipped with two antennas - the main antenna and the additional one. If the parameter "Auto" is set, the antenna diversity monitors the signal of each antenna and automatically switches it to the one with which it is stronger.
Values:
  Auto (default).

Range Preferences
  The "Range Selection" property is only available on dual-band Wireless Network Adapter models. When using the "Range Selection" property, the user can specify the range that corresponds to the IEEE 802.11 standard for roaming. In this case, the wireless client will be able to establish communication with another access point taking into account the selected range, even if the signal of the access point with which the connection is currently established is strong enough to maintain communication.
Values:
  No (default). Roaming without considering the frequency range of available access points.
  802.11a (5 GHz band)
  802.11g / b (2.4 GHz band)

Bluetooth Connectivity
  Bluetooth connectivity enables a universal I / O suppression protocol between IEEE 802.11 media access control (MAC) and an external Bluetooth signal to minimize interference. Interaction with Bluetooth Permitted by default.
Values:
  Allow (default)
  Deny

BSS mode
The BSS mode is used to restrict the IEEE 802.11b / g band to only the IEEE 802.11b mode. The BSS mode is applicable to networks configured for access points.
Values:
  Default (default)
  802.11b Only

Off radio with a wired connection.
  If this option is set to "Enabled" when the computer is connected to the Ethernet port and in case of a good connection, the computer automatically turns off the IEEE 802.11 radio. This will save the IP address allocation, reduce the security risk, resolve the routing problems of the dual interface and extend the battery life.
Values:
  Disabled (default)
  Allowed

IBSS mode enabled
  You must enable this property to use the Dell Wireless WLAN Card utility or the wizard wireless connection   to create an ad-hoc network or connect to it. For security reasons, the network administrator may request that this property be turned off.
Values:
  Enabled (default)
  Turned off

Protection mode IBSS 54g (tm)
  The mechanism for setting a prefix for each OFDM data frame with a request for sending / clearing for sending (RTS / CTS) a sequence of dialing frames from the keyboard (CCK). The duration fields of RTS and CTS frames should allow the IEEE 802.11b node to correctly set its NAV and avoid conflicts with successive OFDM frames. In accordance with the requirements of Wi-Fi (r), the protection mechanism is automatically enabled whenever the IEEE 802.11b STA is connected to the BSS. If there are no IEEE 802.11b compliant STA, then no protection mechanism is used and full performance of IEEE 802.11g is achieved.
Values:
  Auto
  Disabled

IBSS mode
  The IBSS mode is used to establish the type of connection for an ad hoc network. The parameters can be:
Values:
  802.11b mode (default). Communication only with IEEE 802.11b networks with the highest transmission speed. This also excludes IEEE 802.11g networks.
  Mode 802.11g Communication only with IEEE 802.11g networks with the highest transmission speed.

Access Point Compatibility Mode
  The implementation of earlier access points may have deviations from IEEE 802.11 standards. Setting this property for Better compatibility allows the Wireless Network Adapter to improve communication with such access points, but at the expense of performance loss. The default setting is Best Performance.
Values:
  Best Performance (default)
  Best compatibility

Managed MAC address
A locally-managed MAC address is used to replace the MAC address of the Wireless Network Adapter utility. A locally managed MAC address is a user-defined MAC address used in place of the MAC address originally assigned network adapter. Each network adapter must have its own MAC address. A locally-managed address is a 12-digit hexadecimal value.
Values:
  Value. Assigns a unique host address to the adapter.
  Not available (default). Use the adapter address assigned by the manufacturer.

The corresponding assigned ranges and exceptions for the locally managed address are as follows:
  The range is from 00: 00: 00: 00: 00: 01 to FF: FF: FF: FF: FF: FD
  Do not use a multicast address (least significant bit of high byte = 1).
  Do not use only zeros in the address, or only "F".

Minimum power consumption
  When this property is enabled, it allows the wireless client either to turn off the radio or not to scan if there is no connection to the wireless client network or in the IDLE state of the computer.
Values:
  Enabled (default)
  Turned off

PLCP header
  The PLCP header is used to specify the header type for CCK speeds. The type can be Long or Auto (short / long).
Values:
  Auto (short / long) (default)
  A long

Power Saving Mode
  The "Power Saving Mode" property is used to transfer the wireless client computer to the power saving mode of IEEE 802.11. When the "Energy Saving Mode" property is turned on, the radio device is periodically turned off to conserve energy. When the radio device is in power saving mode, the received packets are stored at the access point until the radio device is turned on. The "Fast" option provides full bandwidth while saving energy.
Values:
  Fast (default)
  Enabled
  Turned off

Broadcast on / off
  If the value of this property is set to "Disabled", then the radio is off. Sometimes it is necessary to temporarily turn off the radio to comply with restrictions that prohibit the spread of radio signals, for example on board commercial air transport during take-off or landing. Changing the value to "Enabled" again turns the radio on. Some computers may have different, more convenient way   turn the radio on and off. To find out if such functions exist in your computer, refer to the computer's instruction manual.
Values:
  Enabled (default)
  Disabled

Speed
This property allows you to specify the speed (in Mb / s) with which the data is transmitted. Possible values ​​are: 1; 2; 5.5; 6; 9; eleven; 18; 24; 36; 48 and 54. The default is "Optimal speed". This parameter automatically adjusts the transmission speed to the optimum, based on the capabilities of other wireless clients and access points.

Speed ​​(802.11a)
  This property allows you to specify the speed (in Mb / s) with which data is transmitted for IEEE 802.11a operations. Possible values ​​are: 6; 9; 12; 18; 24; 36; 48 and 54. By default, the "Optimal speed" is set.
  NOTE The value of this property is set to the maximum performance by default. Therefore, users of home networks are not advised to change this value. Changes can only be made by network administrators or technicians with experience with wireless LANs.

Speed ​​(802.11b / g)
  This property allows you to specify the speed (in Mb / s) with which data is transmitted for IEEE 802.11b / g operations. Possible values ​​are: 1; 2; 5.5; 6; 9; eleven; 18; 24; 36; 48 and 54. The default is "Optimal speed".
  NOTE The value of this property is set to the maximum performance by default. Therefore, users of home networks are not advised to change this value. Changes can only be made by network administrators or technicians with experience with wireless LANs.

Disable ranges
  This feature is only available on those Wireless Network Adapter models that have dual-band compatibility.
Values:
  No (default)
  Disable 802.11g / b
  Disable 802.11a

Fragmentation threshold
Maximum size   in bytes, in which packets are fragmented and transmitted one fragment per unit of time instead of transmitting the entire packet at once. The available values ​​are in the range from 256 to 2346. The default value is 2346.

Roaming solution
  Signal intensity values ​​that determine when the Wireless Network Adapter utility starts scanning in search of other access points.
Values:
  Default setting (default). 75 dB
  Bandwidth 65 dB
  By distance 85 dB

Roaming Trends
  This property configures the roaming limits for the Wireless Network Adapter utility.
Values:
  Moderate (default). Roaming for access points amplifies the signal by at least 20 dB compared to the current access point.
  Aggressive. Roaming for access points amplifies the signal by at least 10 dB compared to the current access point.
  Restrained. Roaming for access points amplifies the signal by at least 30 dB compared to the current access point.

RTS threshold
If the number of frames in the data packet is close to the threshold or beyond the RTS threshold, the send / clear request to send the handshaking confirmation is turned on before sending the data packet. The default value is 2347. The range is from 0 to 2347.

Auto-update SSID
  When using the wireless network wizard or the wireless network connection setup tool to connect to a wireless network, all networks to which connections are available are displayed in the "Preferred network connections"On the Wireless Networks tab of the Dell Wireless WLAN Card utility. Each time the computer starts, it automatically attempts to connect to the network listed at the top of the list. If the network enters the range, a connection is made. If the value is out of range, the computer attempts to connect to the next network in the list and continues this procedure until it finds a suitable network. Preferred networks in the list can be moved up or down.

If the "Auto-Update SSID" property is disabled, you can manually disable the automatic connection to the network and connect to any network, regardless of its location in the list (see "Utility Management Tools"). If the Auto-Update SSID property is enabled, you can not manually disable the auto-connect process.
Values:
  Disabled (default)
  Enabled

WMM
  Wi-Fi Multimedia (WMM (tm)). The WMM property provides quality of service for audio, video and voice applications through a wireless network by setting priorities for content flows and optimizing the way bandwidth is allocated to competing applications.
Values:
  Auto (default). If the WMM property is set to Auto, when the wireless client is connected to an access point and the option "Unscheduled transition to power save mode" is turned on for this point, the wireless client will be able to enter the power saving mode.
  Enabled. The wireless client goes into power save mode for WMM connections, regardless of whether the option of an unplanned transition to power saving mode for the access point is on or off.
  Turned off. The wireless client does not have a WMM connection.

Channel number WZC IBSS
  The "WZC IBSS Channel Number" property selects the Independent Base Service (IBSS) setup channel number for operation at a time when wireless networks will be managed by the WZC. The default value is 11.

Ethernet under WZC control
  If the property "Ethernet controlled by WZC" is enabled, then the service is enabled wireless settings (WZC) to manage 802.1x connections for Ethernet devices on the computer.
Values:
  Disabled (default)
  Enabled

XPress Technology (TM)
  Xpress ™ technology is a proprietary packet-frame technology that allows you to increase performance by redistributing data so that you can send it to any frame. Xpress ™ technology is disabled by default.
Values:
  Disabled (default). Disable Xpress ™ technology.
  Enabling Xpress ™ technology.

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