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Android system transplantation and debugging -------) how to modify the number of 4G signal strength grids displayed on Android phones Before modifying the displayed signal strength, let's take a look at what is dB and what is dBm? 1. dBDB is a value that represents relative
the use of the voltage ratio of both calculation, to use 20log (methyl voltage /b voltage). [Example] a power than the second power of one-fold, then 10LG (a power/b power) =10lg2=3db, that is, a power than B power of 3 DB. Conversely, if the power of a is half of the power of B, then the power of a is smaller than the power of B 3 DB. Summary: DBM is a negative number, the closer to 0 the higher the signal
power size value. In dB and DBM computing, pay attention to the basic concepts, When one DBM is used to subtract another dBm, the result is dB, for example, 30dbm-0dbm = 30db. 3. Cell phone signal strength Representation Okay, soMobile phoneThe unit of the number show
How GSM is calculated:A: This is GSM, whether the LTE should be different.ASU conversion to dbm:dbm=-113+ (2*asu)All* Get the GSM Signal strength, valid values is (0-31) as defined in TS* 27.007 8.5if (ASU else if (ASU >=) level = Signal_strength_great (4);else if (ASU >= 8) level = Signal_strength_good (3);else if (ASU >= 5) level = Signal_strength_moderate (2);
/uploadfile/2016/0311/20160311052659540. JPG "/>After the Wirelessmon software starts, the default interface is the "Profile" interface, where you can see all the wireless signals that the wireless card can search for and their information:Upper left area:Wireless information for the current connectionSSID: The SSID that is currently connected to the wireless signal;Channel: The channel occupied by the signal
Steps:1. Run first, porterrshow view port status, then ' Statsclear ' and ' slotstatsclear '2. View: Porterrshow, look at the port.3. Collection of Supportshow, Supportsave4. View Sfpshow-all can see the second-to-last line of 23 Rx power status, if larger is normalSfpshow-all:=============Port 0:=============Identifier:3 SFPConnector:7 LCtransceiver:540c402000000000 200,400,800_mb/s m5,m6 SW inter_distEncoding:1 8B10BBaud rate:85 (Units Megabaud)Length 9u:0 (units km)Length 9u:0 (Units-meters)L
#1: Find the wireless network card type information$Lspci$Lspci | grep-I Wireless$Lspci | egrep-I -- color 'wifi | WLAN | wireless' #2: Find the wireless NIC driver information$Lspci-VV-s 0C: 00.0 Example:0C: 00.0 network controller: Intel Corporation ultimate n WiFi Link 5300Subsystem: Intel Corporation device 1121Control: I/O-MEM + busmaster + speccycle-memwinv-vgasnoop-parerr-Stepping-serr + fastb2b-disintx-Status: Cap + 66 MHz-UDF-fastb2b-parerr-devsel = fast> tabort-serr-Kernel Driver i
Ecsq command parameter description for network signal strength parameters of android system, androidecsq Ecsq command parameter description:// For LTE (MT6592) // AT + ECSQ: // GSM: + ECSQ: // UMTS: + ECSQ: // LTE: + ECSQ:
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