Introduction
dB is denoted for Decibel. dB is a ratio of input signal level to the output signal level. It is used for RF devices like Splitters and amplifiers . Input Signal level defined as mV µV nV but these units are having large magnitude. We need to use short units.
These short units are defined as dBm dBmV dBuV.
Thus there are two kind of voltages. First is Source Voltage and second is Potential Difference. This potential difference is also called the Voltage Difference.
dBm
dBm gives the signal in miliwatt. This units is used for RF devices which are having resistance of 50 ohm.
dBmV
dBmV gives ths signal in milivolt. This units is used for 75 ohm devices. This device can be Television Receiver. Because this TV receiver have the resistance of 75 ohm.
dBuV
dBuV gives the signal in microvolt. This is very small unit. It is measured in decibel with respect to 1 MicroVolt accross 50 Ohm resistance.
Conversion Of dBm dBmV dBuV
dBm dBmV dBuV Conversion for different system is mentioned below,
For 50 Ω system,
dBmV = dBm + 47 dB
dBV = dBm – 13 dB
dBuV = dBm + 107 dB
For 75 Ω system,
dBmV = dBm + 48.75 dB
dBV = dBm – 11.25 dB
dBuV = dBm + 108.75 dB
Conversion Table dBm dBmV dBuV
dBuV | dBmV | uV |
0 | -60 | 1 |
1 | -59 | 1.11 |
2 | -58 | 1.25 |
3 | -57 | 1.41 |
4 | -56 | 1.58 |
5 | -55 | 1.77 |
6 | -54 | 1.99 |
7 | -53 | 2.23 |
8 | -52 | 2.51 |
9 | -51 | 2.81 |
10 | -50 | 3.16 |
11 | -49 | 3.54 |
12 | -48 | 3.98 |
13 | -47 | 4.47 |
14 | -46 | 5.01 |
15 | -45 | 5.62 |
16 | -44 | 6.31 |
17 | -43 | 7.07 |
18 | -42 | 7.94 |
19 | -41 | 8.93 |
dBuV | dBmV | uV |
20 | -40 | 10 |
21 | -39 | 11.22 |
22 | -38 | 12.5 |
23 | -37 | 14.13 |
24 | -36 | 15.85 |
25 | -35 | 17.78 |
26 | -34 | 19.95 |
27 | -33 | 22.39 |
28 | -32 | 25.12 |
29 | -31 | 28.18 |
30 | -30 | 31.62 |
31 | -29 | 35.48 |
32 | -28 | 39.81 |
33 | -27 | 44.67 |
34 | -26 | 50.12 |
35 | -25 | 56.23 |
36 | -24 | 63.1 |
37 | -23 | 70.79 |
38 | -22 | 79.43 |
39 | -21 | 89.13 |
dBuV | dBmV | uV |
40 | -20 | 100 |
41 | -19 | 112.2 |
42 | -18 | 125.9 |
43 | -17 | 141.3 |
44 | -16 | 158.5 |
45 | -15 | 177.7 |
46 | -14 | 199.5 |
47 | -13 | 223.9 |
48 | -12 | 251.2 |
49 | -11 | 281.8 |
50 | -10 | 316.2 |
51 | -9 | 354.8 |
52 | -8 | 398.1 |
53 | -7 | 446.7 |
54 | -6 | 501.2 |
55 | -5 | 562.3 |
56 | -4 | 631 |
57 | -3 | 707.9 |
58 | -2 | 794.3 |
59 | -1 | 891.3 |
dBuV | dBmV | mV |
60 | 0 | 1 |
61 | 1 | 1.12 |
62 | 2 | 1.25 |
63 | 3 | 1.41 |
64 | 4 | 1.58 |
65 | 5 | 1.77 |
66 | 6 | 1.99 |
67 | 7 | 2.23 |
68 | 8 | 2.51 |
69 | 9 | 2.81 |
70 | 10 | 3.16 |
71 | 11 | 3.54 |
72 | 12 | 3.98 |
73 | 13 | 4.46 |
74 | 14 | 5.01 |
75 | 15 | 5.62 |
76 | 16 | 6.31 |
77 | 17 | 7.07 |
78 | 18 | 7.94 |
79 | 19 | 8.91 |
dBuV | dBmV | mV |
80 | 20 | 10 |
81 | 21 | 11.22 |
82 | 22 | 12.59 |
83 | 23 | 14.13 |
84 | 24 | 15.85 |
85 | 25 | 17.78 |
86 | 26 | 19.95 |
87 | 27 | 22.39 |
88 | 28 | 25.12 |
89 | 29 | 28.18 |
90 | 30 | 31.62 |
91 | 31 | 35.48 |
92 | 32 | 39.81 |
93 | 33 | 44.67 |
94 | 34 | 50.12 |
95 | 35 | 56.23 |
96 | 36 | 63.1 |
97 | 37 | 707.9 |
98 | 38 | 79.43 |
99 | 39 | 89.13 |
dBuV | dBmV | mV |
100 | 40 | 100 |
101 | 41 | 112.2 |
102 | 42 | 125.9 |
103 | 43 | 141.3 |
104 | 44 | 158.5 |
105 | 45 | 177.8 |
106 | 46 | 199.5 |
107 | 47 | 223.9 |
108 | 48 | 251.2 |
109 | 49 | 281.8 |
110 | 50 | 316.2 |
111 | 51 | 354.8 |
112 | 52 | 397.1 |
113 | 53 | 446.7 |
114 | 54 | 501.2 |
115 | 55 | 562.3 |
116 | 56 | 631 |
117 | 57 | 707.9 |
118 | 58 | 794.3 |
119 | 59 | 891.3 |
dBuV | dBmV | Volts |
120 | 60 | 1 |
121 | 61 | 1.12 |
122 | 62 | 1.25 |
123 | 63 | 1.41 |
124 | 64 | 1.58 |
125 | 65 | 1.77 |
126 | 66 | 1.99 |
127 | 67 | 2.23 |
128 | 68 | 2.51 |
129 | 69 | 2.81 |
130 | 70 | 3.16 |
131 | 71 | 3.51 |
132 | 72 | 3.98 |
133 | 73 | 4.46 |
134 | 74 | 5.01 |
135 | 75 | 5.62 |
136 | 76 | 6.31 |
137 | 77 | 7.07 |
138 | 78 | 7.94 |
139 | 79 | 8.91 |
140 | 80 | 10 |
This is all about the dBm dBmV dBuV And Conversion Table Of dBm dBmV dBuV.