Explanation of Signal strength in dBm and ASU
If we use the signal status facility on android smartphones or other signal status information software, we encounter signal strength information like this: Signal Strength -105 dBm 4 asu. The dBm unit is something that we may have heard many times before, for asu it may be a bit foreign to us, especially me at first. Because I haven't found an article in Indonesian that explains this matter. Don't imagine that asu is Javanese for dog!!! 😀 .
Okay later we will discuss one by one. for those who don't know how to check the signal strength on an android cellphone can be seen in the previous article: How to easily find out the operator's signal strength on Android phones .
dBm (sometimes dB mW or decibel-milliwatt) is an abbreviation for power ratio in decibels (dB) referenced to milliwatt (mW) units. This unit is commonly used in radio, microwave and fiber optic networks. For numbers with a minus sign (-) in front, the larger the value, the smaller the signal strength.
For example:
-100 dBm is smaller than - 78 dBm,
(-78 dBm signals are stronger or better than -100 dBm.)Read Also: Easy and Fast IP Setting with Netsetman
Arbitrary Strength Unit (ASU) is a value in interger proportional to the received signal strength measured by the Cell Phone device.
In GSM Networks, the formula for calculating signal strength in dBm is:
dBm = 2 × ASU - 113,
ASU in the number range of 0..31 and 99 (for unknown or undetected signals).
Example: On smartphone information Signal Strength -105 dBm 4 asu
dBm= 2 x 4 - 113 = -105 dBm
ASU in the number range of 0..31 and 99 (for unknown or undetected signals).
Example: On smartphone information Signal Strength -105 dBm 4 asu
dBm= 2 x 4 - 113 = -105 dBm
In UMTS Networks, the formula for calculating signal strength in dBm is as follows:
dBm = ASU - 116,
ASU in the range of -5..91 and 255 (for unknown or undetected signals).
Example: On smartphone information Signal Strength -96 dBm 10 asu
dBm= 2 x 10 - 116 = -96 dBm
ASU in the range of -5..91 and 255 (for unknown or undetected signals).
Example: On smartphone information Signal Strength -96 dBm 10 asu
dBm= 2 x 10 - 116 = -96 dBm
In LTE Networks, the formula for calculating signal strength is in dBm:
The valid numerical range of ASU is from 0 to 97. For the range of 1 to 96, ASU is mapped to
(ASU - 141) ≤ dBm < (ASU - 140).
The number 0 is mapped to RSRP below -140 dBm and the number 97 is mapped to RSRP above -44 dBm.
Conclusion:
So here it can be concluded that the higher the dBm number (in minus numbers), the weaker the signal, while the higher the ASU value, the stronger the signal. Example: the number -101 dBm is weaker than -87 dBm, the number 10 ASU is stronger than 4 ASU. Hopefully this article can help you understand what is dBm and ASU. Thank you!!!
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Makansih gan ilmnya, so the good thing is a little dBm minus and high ASU 😀
Want to ask, gan, I plan to buy an antenna for mifi, in the description there is "real gain : 10dBm", now my signal at home is 2 bars (lte) ... Now if for example you get 10 dBm after using the antenna, that 10 dBm will affect how much do you think? Thanks
in theory, it will increase by 10 dBm from the original signal. for example, the original signal of -100 dbm will turn into -90 dbm. But in reality it will be influenced by many things, ranging from media blocking and interference from other devices. That's what I know..if there is something wrong, please correct me!!!
Okay, really good to add insight...
Gan if -80 dbm 60 asu kira2 have ane how gan, because ngaco tuh gan 2×60-113 = -7 gan and slow signal gan!!! Then how to cure it how gan?
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The science is steady 8 thumbs up
Mntap his knowledge gan,, if the maximum speed in dbm what is it?
judging from the type of network, if I see -80 dBm 60 ASU this must be in the LTE network so the calculation uses calculating
(ASU - 141) ≤ dBm < (ASU - 140)
(60 - 141) ≤ dBm < (60 - 140)
(-81) ≤ dBm < (-80)
hope it helps