- Can you explain how to understand the signal strength in your phone?
- What is the difference between -95 dBm and -105 dBm in terms of milli watts?
Signal strength received by your phone in milli watt
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Signal strength in our cellphones can be seen in dBm. It varies depending on the received signal strength at the receiver.
We know that
-95dBm means 3.16 * 10^(-10) mW
-105dBm means 3.16 * 10^(-11) mW
It tells that, in case of -95dBm, cellphone is receiving signal with 10mW higher power compared to -105dBm.
-105dBm = 10^ -10.5 mW = 31.6 pW
Difference=284.6 pw
In the SIM card settings of our mobile handsets, we observe the received signal power levels in dBm. That is, the transmitted signal from the base station gets attenuated all through the wireless channel and gets attenuated. The received signal levels would generally be seen picowatts(pW) to femtowatts(fW).
If the signal strength is around 90 dBm to 100 dBm then it is a good signal strength. If it is around 110 dBm or more, then the signal is badly attenuated and it becomes difficult for the mobile receiver to sense these signals hence termed as ” bad network”. Here the sensitivity of the receiver plays an important role.
We usually see the signal strength on our mobile display as vertical lines ( from one vertical line to three or four lines). The “asu” parameter is calculated according to the received signal strength using some empirical formula and corresponding signal strength is displayed on the screen.
The conversion formula of dBm to watts is given as
P(dBm) = 10log(P(watts)/1milliwatt)
the base of logarithm is 10.
-95 = 10log(P1/10^(-3))
P1 = 3.16*10^(-13) watts
P1 = 316 fW
P2 = 31.6 fW
difference = 284.4 fW ( femito watts)
Cell phone signal strength is measured in decibels(dBm).Signal strengths can range from approximately -30dBm to -110dBm.The closer that number is to 0 ,the stronger the cell signal.In general anything better than -85dBm is considered as a usable signal.
.1mw = 10^(dBm/10)
for -95dBm = 316.22fW
for -105dBm =31.6fW
but -95dBm has better signal strength than -105dBm.
Difference is 284.6fW
Signal strength in mobile is measured in dBm .The close to zero the number is stronger the cell phone signal.
Close to no signal strength – -110dBm
Poor signal strength- -110dBm to -85dBm
Good signal strength- -84dBm to -65dBm.
Excellent signal strength- -64dBm to -50dBm
-95dBm in milli watts is 10^(-9.5)
-105dBm in milliwatts is 10^(-10.5)
The difference is approximately 284.6fw(femto watts)
Signal strength measured in dBm decible milliwatts. the signal strength varys logarithmic. Since dB scale logarithmic measure. it represent as minus sign of dBm because of negative value indicate less background noise. dBm express absolute power level. If the dBm closer to zero has higher signal strength.
Conversion of dbm in terms of milliwatts
1mW=10^(dbm/10)
for -95dBm = 316.22 pW
for -105dBm = 31.6 pW
we conclude that -95dBm signal has higher signal strength than -105dBm with difference of 284.6 pW
The signal strength in our mobiles is generally given in terms of dBm.
Usually signal strength greater than -85dBm is considered as good strength.
If signal strength is below -110dBm it is considered very poor strength.
In poor signal strength the UE requires more power to send the signals thus we can observe that our battery drains more in a bad network.
Difference in (mW)
The difference is approximately 284.6fw(femto watts)
Signal Strength of a mobile phone is measured in dBm. Signal strength in dBms is expressed as a negative number and ranges from -30 dBm to -110 dBm. Less the number the stronger is the signal. Signal strength is below -110dBm it is considered very poor strength.
-95dBm = 10^-9.5 mW = 316.22 fW
-105dBm = 10^ -10.5 mW = 31.6 fW
Hence we conclude that -95dBm signal has higher signal strength than -105dBm with difference of 284.6 fW
Signal strength in mobile system indicates the capability of amount of signal receiving. If the signal strength is low then the amount of signal receiving properly is very less.
So, we can see that for -105dBm, we are getting 10 times less power than -95dBm.
The signal strength is measured in decibels i.e. dBm. The range of signal strength varies from -30 dBm to -110 dBm. -85 dBm or better than that is considered as a decent signal strength for Cell phone.
The formula for Conversion of dBm to watt is given as,
P(W) = 1W ⋅ 10(P(dBm) / 10) / 1000 = 10((P(dBm)– 30) / 10)
P1(W) = 1W ⋅ 10(-95 / 10) / 1000 = 10((-95– 30) / 10)
P1(W) = 10-12.5
P2(W) = 1W ⋅ 10(-105/ 10) / 1000 = 10((-105– 30) / 10)
P2(W) = 10-13.5
P1(W) – P2(W) = 10-12.5 – 10-13.5
P1(W) – P2(W) = 10-12.5 {1 – 0.1}
P1(W) – P2(W) = 284.6 x 10-12 mW
The signal strength of phone is measured in terms of dBm.dBm stands for decibels per milliwatt.
If the number is closer to zero, then the signal is said to be strong.
Signal of greater than -70 dBm is considered an excellent signal in all networks.poor signal will be -100 dBm or worse in 3G networks and -110 dBm or worse in 4G networks.
The formula for calculating dBm measurement is 10 x log (signal strength per milliwatts). Measurement of signal strength is in dBm and is the most accurate measurement available.
Therefore according to above formula
(-95) =10log(p1 in milli watt ) p1 in milliwatt = 10^(-9.5) p1=316.23*10^(-15)watt
Similarly p2 in milliwatt =10^(-10.5) P2=31.623*10^(-15) watt
Difference between the power is p1-p2=284.6*10^(-15) watt. That is 284.6 femto watt.
Our cell phone signal strength is measured in decibels i.e. dBm. Signal strength has the range from approximately -30 dBm to -110 dBm. In general, anything better than -85 dBm is considered a usable signal.
The closer to zero the dBm reading is, the stronger the cell phone signal.
Conversion of dBm to watts :
P(dBm) = 10log(P(watts)/1milliwatt) ; here the base of log is 10.
-95dBm = 10^-9.5 mW = 316.22 fW
-105dBm = 10^ -10.5 mW = 31.6 fW
let P1 = 316.22 fW
& P2 = 31.6 fW
Hence we conclude that -95dBm signal has higher signal strength than -105dBm with difference = 284.4 fW ( femito watts)
The signal strength on a mobile phone is typically measured in decibels (dBm) and is an indication of the power level of the wireless signal. A higher decibel value indicates a stronger signal, while a lower decibel value indicates a weaker signal.
It is worth noting that the dBm values can vary depending on the network technology. For example, -70 dBm is considered to be a strong signal for 4G LTE, but it is considered weak for 5G.
Generally, signal strengths below -100 dBm indicate poor coverage while signal strengths above -50 dBm indicate good coverage.
dBm is a dimensionless unit and is used to express the ratio of a power level relative to 1 milliwatt (mW). The dBm scale is based on the decibel (dB) unit, which is used to express the ratio of two values such as two power levels.
Formula to convert watt into dBm
dBm = 10 * log10(Power in watts)
1mW=10^(dbm/10)
for -95dBm = 316.22 pW
for -105dBm = 31.6 pW
so -95dBm has strong signal strength than -105dBm.
Difference is 284.6fW
The signal strength of a cell phone is measured in decibels i.e. dBm. Signal strengths can vary from -30 dBm to -110 dBm. As the number goes lower towards zero, the stronger the cell signal will be and higher the number , the weaker the cell signal . In general, anything better than -85 decibels is considered a usable signal.
The conversion formula from dBm to watts is given as
P(-95dBm) = 10^-9.5 mW = 316.22 fW
P(-105dBm )= 10^ -10.5 mW = 31.6 fW
The difference between the powers is 284.6fw(femto watts).
Hence, -95dBm has a stronger signal strength than -105dBm.