# convert db to dbm

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### The meaning and benefit of the unit db (decibel), the meaning of dBm (DBMW db milli-watt)

Meaning of DBUnitdb, or decibel, is a very common unit in the field of electronics. This unit is characterized by the use of logarithms to represent the original data. 1 shell = 10 db = 10dB = 10 times times PowerFor an amplifier,power Magnification Ap = ten lg (PO/PI)voltage Magnification Au = LG (UO/UI)current Magnification Ai = LG (IO/II)For example: amplifier magnification of 40dB, indicating that its voltage amplification is 100 times times, curr

### What does DB and DBM mean ~

DBMPower Unit and P (Watt) conversion formula:DBM = 30 + 10lgp (P: Tile)First, DB is a pure counting unit: DB = 10 logX. The significance of DB is actually a simple one, that isThe number of large (followed by a long string of 0) or small (followed by a long string of 0) is briefly expressed. For example:X = 1000000000000000 (How many ?) = 10 logX = 150 dBX = 0.0

### Conversion between DB, DBm, and DBw

Decibel (decibel,db) is a ratio function that operates on dimensionless parameters: DB=˙10LOG10 (x), where x is unitless D B =˙10 l o G Ten (x), where x is unitless dB \dot = Ten log_{10} (x), \quad \text{ Where $x$ is unitless} For example, the amplifier gain is a dimensionless value, which is the ratio of output power to input power: Poutpin=gtherefore Gain i

### Analysis of DBM and DB concepts

1. DBM DBM is the absolute value of power. The formula is: 10lgp (power value/1 MW ). [Example 1] If the transmit power P is 1 MW, it is converted to dBm and then 0dbm. [Example 2] for 40 W power, the converted value in dBm unit should be: 10lg (40 W/1 MW) = 10lg (40000) = 10lg4 + 10lg10 + 10lg1000 = 46dbm. 2. DBI and

### Concept Analysis: dBm, DBI, DBD, DB, DBC, dbuv

than B's power, the following formula is used: 10lg (a power/B power)[Example 6] If the power of a is twice the power of B, then 10lg (the power of a/B) = 10lg2 = 3 dB. That is to say, the power of a is 3 dB higher than that of B.[Example 7] 8 inch M transmission loss of the 100/GSM 900 feeder is about dB.[Example 8] If the power of a is 46dbm and that of B is 4

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### "Turn" db/dbm

DB, which represents a relative value. When calculating A's power compared to b large or small number of db, can be calculated as the formula 10LG A/b. For example: A power is one-fold larger than B power, then 10lg A/b = 2 lg = 3dB, that is, the power of a is greater than the power of B 3dB; If the power of a 46dbm,b is 40dBm, it can be said that a is greater than B 6dB; if the a antenna is 12dBm, b antenn

### Convert background data from the Berkeley file DB to MySQL

mt; Next look for methods to convert existing DB to MySQL, and soon find a third-party tool mt-db-convert.cgi, the conversion between several databases supported by MT can be realized. Download the package to the mt directory of cgi-bin and run it in the browser. Enter the new MySQL database name mt, user name root, password, host name localhost, and start

### Convert background data from the Berkeley file DB to MySQL_MySQL

database testuse test; create the database mtcreate database mt; next look for methods to convert existing DB to MySQL, and soon find a third-party tool mt-db-convert.cgi, the conversion between several databases supported by MT can be realized. Download the package to the mt directory of cgi-bin and run it in the browser. enter the new MySQL database name mt, u

### Caffe Study Notes (10) Convert image data to db (Leveldb/lmdb) file

In the practical application of deep learning, we often use the original data is a picture file, such as Jpg,jpeg,png,tif, and may be the size of the picture is not consistent. The type of data that is often used in Caffe is Lmdb or leveldb, so a problem arises: how can I convert from the original picture file to a db (Leveldb/lmdb) file that can run in Caffe?In Caffe, the author provides us with such a fil

### customerized convert from field type to DB field ' s type

@LastModifiedDate@Convert (converter = localdatetime2timestampconverter. class) @Slf4j Public class Localdatetime2timestampconverter implementsattributeconverterLocalDateTime, timestamp> { @OverridePublic Timestamp converttodatabasecolumn(LocalDateTime ld) { return ld = = null ? null : new Timestamp (ld.todatetime (). Getmillis ()); }@OverridePublic LocalDateTime converttoentityattribute(Timestamp ts) { if (ts! = null) { try { ret

### How big is the MB/GB/TB/PB/EB/ZB/YB/NB/DB/CB storage space? How to convert?

, pronounced "Y-byte"There are also legends.1NiB (Nonabyte) =1024yib, which is 2 of 90 square bytes1DiB (Doggabyte) =1024nib, which is 2 of 100 square bytes1CiB (Corydonbyte) =1024dib, which is 2 of 110 square bytesNote: A lot of information on the Internet has the nib and Dib reversed. NB is not the largest, more than NB is the db, haha! And the bigger is CB.We must see Icech above is not the title of the Mb/gb/tb/pb/eb/zb/yb, and the middle are adde

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