LTE UE Category & Class Definitions

http://www.radio-electronics.com/info/cellulartelecomms/lte-long-term-evolution/ue-category-categories-classes.php

TPlink Calculator Wireless

http://www.tplink.com/be/support/calculator/#2

dBm

Reference Website
https://en.wikipedia.org/wiki/DBm



dBm (sometimes dBmW or decibel-milliwatts) is an abbreviation for the power ratio in decibels (dB) of the measured power referenced to one milliwatt (mW). It is used in radio, microwave and fiber optic networks as a convenient measure of absolute power because of its capability to express both very large and very small values in a short form. Compare dBW, which is referenced to one watt (1000 mW).

Since it is referenced to the watt, it is an absolute unit, used when measuring absolute power. By comparison, the decibel (dB) is a dimensionless unit, used for quantifying the ratio between two values, such as signal-to-noise ratio.

In audio and telephony, dBm is typically referenced relative to a 600 ohm impedance,[1] while in radio frequency work dBm is typically referenced relative to a 50 ohm impedance.


Power level

	Power	Notes
80 dBm	100 kW	Typical transmission power of FM radio station with 50-kilometre (31 mi) range
62 dBm	1.588 kW = 1,588 W	1,500 W is the maximum legal power output of a U.S. ham radio station.[3]
60 dBm	1 kW = 1,000 W	Typical combined radiated RF power of microwave oven elements
55 dBm	~300 W	Typical single-channel RF output power of a Ku-Band GEO-stationary satellite
50 dBm	100 W	Typical total thermal radiation emitted by a human body, peak at 31.5 THz (9.5 micron) Typical maximum output RF power from a ham radio HF transceiver
40 dBm	10 W	Typical PLC (Power Line Carrier) transmit power
37 dBm	5 W	Typical maximum output RF power from a handheld ham radio VHF/UHF transceiver
36 dBm	4 W	Typical maximum output power for a Citizens' band radio station (27 MHz) in many countries
33 dBm	2 W	Maximum output from a UMTS/3G mobile phone (Power class 1 mobiles) Maximum output from a GSM850/900 mobile phone
30 dBm	1 W = 1,000 mW	DCS or GSM 1,800/1,900 MHz mobile phone. EIRP IEEE 802.11a (20 MHz-wide channels) in either 5 GHz Subband 2 (5,470–5,725 MHz) provided that transmitters are also IEEE 802.11h-compliant, or U-NII-3 (5,725–5,825 MHz). The former is EU only, the latter is US only.
29 dBm	794 mW
28 dBm	631 mW
27 dBm	500 mW	Typical cellular phone transmission power Maximum output from a UMTS/3G mobile phone (Power class 2 mobiles)
26 dBm	400 mW
25 dBm	316 mW
24 dBm	251 mW	Maximum output from a UMTS/3G mobile phone (Power class 3 mobiles) 1,880–1,900 MHz DECT (250 mW per 1,728 kHz channel). EIRP for Wireless LAN IEEE 802.11a (20 MHz-wide channels) in either the 5 GHz Subband 1 (5,180–5,320 MHz) or U-NII-2 & -W ranges (5,250–5,350 MHz & 5,470–5,725 MHz respectively). The former is EU only, the latter is US only.
23 dBm	200 mW	EIRP for IEEE 802.11n Wireless LAN 40 MHz-wide (5 mW/MHz) channels in 5 GHz subband 4 (5,735–5,835 MHz, US only) or 5 GHz subband 2 (5,470–5,725 MHz, EU only). Also applies to 20 MHz-wide (10 mW/MHz) IEEE 802.11a Wireless LAN in 5 GHz Subband 1 (5,180–5,320 MHz) if also IEEE 802.11h compliant (otherwise only 3 mW/MHz → 60 mW when unable to dynamically adjust transmission power, and only 1.5 mW/MHz → 30 mW when a transmitter also cannot dynamically select frequency).
22 dBm	158 mW
21 dBm	125 mW	Maximum output from a UMTS/3G mobile phone (Power class 4 mobiles)
20 dBm	100 mW	EIRP for IEEE 802.11b/g Wireless LAN 20 MHz-wide channels in the 2.4 GHz Wi-Fi/ISM band (5 mW/MHz). Bluetooth Class 1 radio. Maximum output power from unlicensed AM transmitter per U.S. Federal Communications Commission (FCC) rules 15.219.[4]
19 dBm	79 mW
18 dBm	63 mW
17 dBm	50 mW
15 dBm	32 mW	Typical Wireless LAN transmission power in laptops
10 dBm	10 mW
7 dBm	5.0 mW	Common power level required to test the automatic gain control circuitry in an AM receiver
6 dBm	4.0 mW
5 dBm	3.2 mW
4 dBm	2.5 mW	Bluetooth Class 2 radio, 10 m range
3 dBm	2.0 mW
2 dBm	1.6 mW
1 dBm	1.3 mW
0 dBm	1.0 mW = 1,000 µW	Bluetooth standard (Class 3) radio, 1 m range
−1 dBm	794 µW
−3 dBm	501 µW
−5 dBm	316 µW
−10 dBm	100 µW	Maximum received signal power of wireless network (802.11 variants)
−20 dBm	10 µW
−30 dBm	1.0 µW = 1,000 nW
−40 dBm	100 nW
−50 dBm	10 nW
−60 dBm	1.0 nW = 1,000 pW	The Earth receives one nanowatt per square metre from a magnitude +3.5 star[5]
−70 dBm	100 pW
−73 dBm	50.12 pW	"S9" signal strength, a strong signal, on the S-meter of a typical ham or shortwave radio receiver
−80 dBm	10 pW
−100 dBm	0.1 pW	Minimum received signal power of wireless network (802.11 variants)
−111 dBm	0.008 pW = 8 fW	Thermal noise floor for commercial GPS single channel signal bandwidth (2 MHz)
−127.5 dBm	0.178 fW = 178 aW	Typical received signal power from a GPS satellite
−174 dBm	0.004 aW = 4 zW	Thermal noise floor for 1 Hz bandwidth at room temperature (20 °C)
−192.5 dBm	0.056 zW = 56 yW	Thermal noise floor for 1 Hz bandwidth in outer space (4 kelvins)
−∞ dBm	0 W	Zero power is not well-expressed in dBm (value is negative infinity)

How to Convert VHD to VDI or VDI to VHD file

reference website :http://cloudytech.blogspot.my/2012/10/how-to-convert-vhd-to-vdi-or-vdi-to-vhd.html

reference website: http://www.thewindowsclub.com/how-to-schedule-batch-file-run-automatically-windows-7

How to schedule a Batch File to run automatically in Windows 10 / 8 / 7

RECOMMENDED: Click here to fix Windows errors and optimize system performance

There are occasions where you might need to schedule to run a batch file automatically in your Windows. In this article I’ll suggest a tip on how to schedule a batch file automatically using Task Scheduler.

Schedule a Batch File to run automatically

Step 1: Create a batch file you wish to run and place it under a folder where you have enough permissions. For example under C drive.

Step 2: Click on Start and under search, type in Task and click open Task Scheduler.

Step 3: Select Create Basic Task from the Action pane on the right of the window.

Step 4: Under Create Basic Task, type in the name you like and click Next.

Step 5: From the Trigger select the option you like and click Next.

I chose Daily and clicked Next, which brought me to this screen.

Step 6: Then click on Start a Program and click Next.

Step 7: Now click on Browser and select the batch file you like to run.

Step 8: Finally, click on Finish to create the Task.

Now that we have created a Task, we have to make sure it runs with the highest privilege. Since we have UAC settings we have to make sure that when you run the file it should not fail if it does not bypass the UAC settings.

So click on Task Scheduler Library.

Then double click on the Task you just created.
Step 8: Click on Run with Highest privilege then click OK.

Congratulations!  You have successfully created a Scheduled Task to automate a batch file.

Disk2VHD scheduled backup script

reference website: http://serverfault.com/questions/722718/disk2vhd-scheduled-backup-script

REM
REM A simple backup system using disk2vhd
REM
REM version 1.3, by J.E.B., 2011-02-22
REM
REM requires 'disk2vhd.exe' to be in the path
REM

setLocal EnableDelayedExpansion

REM "DRIVES" can be one drive identifier with colon, multiple separated by spaces,
REM or asterisk for all.  
REM "DEST" can be a drive letter or a UNC.

SET DRIVES="C:"
SET DEST="F:"

REM Keep most recent 4 VHD files in DEST, delete the rest

for /f "skip=4 tokens=* delims= " %%a in ('dir/b/o-d %DEST%\*.VHD') do (
del %DEST%\%%a
)

REM Backup to VHD

C:
cd \
DISK2VHD %DRIVES% %DEST%\%COMPUTERNAME%--%date:~-10,3%%date:~-7,2%%date:~-4,4%.VHD

EXIT /B n

reference website https://techingiteasy.wordpress.com/2015/03/24/how-to-rollback-to-a-previous-version-of-windows-from-windows-10/

How to: Rollback to a previous version of Windows from Windows 10

NOTE: Please be aware the Windows.old folder located at the root of the local disk where Windows 10 is installed will be deleted after 30 days automatically. The Windows.old folder is used to facilitate the rollback. So please perform any rollback within 30 days or this option will no longer be available. Otherwise, create a backup before upgrading to Windows 10.

See links to resources about backing up by clicking the link for the respective version of Windows you are running: Windows XP, Windows Vista, Windows 7, Windows 8/8.1

Summary

Throughout the history of Windows revisions, Microsoft has included an option to uninstall the operating system when you upgrade to a newer version. My recollection of this capability goes back to Windows ME which included the option to uninstall the operating system and restore to a previous version of Windows (I was running Windows 98 SE at the time). Microsoft has supported this functionality in its NT based versions of Windows too, albeit not in a seamless way. The ability to restore a Windows 8.1 installation to Windows 7 required knowing some command line operations that in some instances didn’t guarantee the process would go according to plan. With Windows 10, it seems Microsoft has listened and has provided a welcome option to its recovery tools to make it easy to uninstall Windows 10 and go back to your previous version of Windows. This option can be handy for diagnostics purposes, trial and error or to simply go back to a previous version of Windows that works better with your PC.

Please keep in mind, this only works with Windows 7 and later. Because prior versions of Windows such as Windows Vista and Windows XP can only migrate to Windows 10 through a custom install, the command line operations remain your best choice if you do decide to go back. Also keep in mind, if you do a custom install over Windows 7 or later, the Rollback option is not available. This only works if you had done an in place upgrade from Windows 7 or later.

Start by opening Settings – Click Start > Settings or type Settings in the search bar and click it or press Windows key + i

Click Update and Security

Click Recovery then click Get started under Go back to Windows 7 or Windows 8/8.1 (depending on the previous version you running)

Here you can make multiple selections why are going back to your previous version of Windows along with additional details or you can choose just one and click Next.

As noted, any configurations made to Windows 10 since upgrading will be lost, so if you installed new programs or hardware drivers or made personal settings, those will be deleted.

Click Next

Make sure you have your password ready to sign into your old version if you had been using one. Click Next

The process can take a while depending on the amount data, applications and settings. Click Next

Click Go Back to begin the process.

Windows 10 will Restart

This will be your screen throughout the recovery process.

When the process is complete, you will be booted into your previous version of Windows environment.
If you cannot load the Windows Desktop, you can initiate a Rollback using the following method:

Log out and go to the sign in screen.
Hold down the shift key on your keyboard while clicking the Power button on the screen
Continue to hold down the shift key while clicking Restart
Continue to hold down the shift key until the Advanced Recovery Options menu appears

Click Troubleshoot

 Click Advanced options

Click Go back to the previous version of Windows

Freeware

https://en.wikipedia.org/wiki/Freeware

Failed windows 10 rollback to 7 Forum

 I go through this website

http://www.tomshardware.com/answers/id-2782431/failed-windows-rollback.html

BottleGuy

August 29, 2015 7:54:37 PM

After rolling back my windows 10 pc to 7 the screen remained black so i rebooted and windows 7 starts to load but fails. System repair fails and after my last attempt now the pc wont post and there is no display.

More about : failed windows rollback

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• Reply to BottleGuy

Ubrales

a b $ Windows 7

August 29, 2015 7:58:06 PM

Try re-installing Win 7 using the Win 7 DVD, or restore from a backup that you have.

• Reply to Ubrales

m

0

l

Larry_3

August 30, 2015 9:15:21 AM

Ubrales advised you well, but if you want to try Win 10 again, do it the same way. I hear a lot of complaints and bad vibes from people trying to upgrade. I did a clean install (on 2 different machines) and could not be happier. Burn a DVD or make a USB (better, faster). Get it here:

https://www.microsoft.com/en-us/software-download/windo...

• Reply to Larry_3