Table for quick conversion of dBm to volts and watts at a load of 50 ohms. Encyclopedia of radio electronics and electrical engineering
Encyclopedia of radio electronics and electrical engineering / Measuring technology
Comments on the article
It will be useful to many radio amateurs as a desktop sheet, especially those involved in the design, tuning and measurement of radio receiver equipment. Similar tables have already been printed in various literature, but an attempt was made to summarize and place everything on one sheet. I and many of my friends, having printed this table on a printer, were convinced of its usefulness.
| dBm |
V |
W |
dBm |
V |
W |
dBm |
V |
W |
dBm |
V |
W |
S meter HF dBm m V VHF dBm nV |
| +60 |
224 |
1000 |
0 |
224-3 |
1-3 |
-60 |
224-6 |
1-9 |
-120 |
224-9 |
1.0-15 |
1 -121 0.19 -141 19.9 |
| +59 |
199 |
794 |
-1 |
199-3 |
794-6 |
-61 |
199-6 |
794-12 |
-121 |
199-9 |
794-18 |
2 -115 0.4 -135 39.8 |
| +58 |
178 |
631 |
-2 |
178-3 |
631-6 |
-62 |
178-6 |
631-12 |
-122 |
178-9 |
631-18 |
3 -109 0.79 -129 79.3 |
| +57 |
158 |
501 |
-3 |
158-3 |
501-6 |
-63 |
158-6 |
501-12 |
-123 |
158-9 |
501-18 |
4 -103 1.58 -123 158 |
| +56 |
141 |
398 |
-4 |
141-3 |
398-6 |
-64 |
141-6 |
398-12 |
-124 |
141-9 |
398-18 |
5 -97 3.16 -117 320 |
| +55 |
126 |
316 |
-5 |
126-3 |
316-6 |
-65 |
126-6 |
316-12 |
-125 |
126-9 |
316-18 |
6 -91 6.3 -111 630 |
| +54 |
112 |
251 |
-6 |
112-3 |
251-6 |
-66 |
112-6 |
251-12 |
-126 |
112-9 |
251-18 |
7 -85 12.6 -105 1260 |
| +53 |
99.9 |
200 |
-7 |
99.9-3 |
200-6 |
-67 |
99.9-6 |
200-12 |
-127 |
99.9-9 |
200-18 |
8 -79 25.1 -99 2510 |
| +52 |
89.0 |
159 |
-8 |
89.0-3 |
159-6 |
-68 |
89.0-6 |
159-12 |
-128 |
89.0-9 |
159-18 |
9 -73 50.0 -93 5000 |
| +51 |
79.3 |
126 |
-9 |
79.3-3 |
126-6 |
-69 |
79.3-6 |
126-12 |
-129 |
79.3-9 |
126-18 |
µV and nV at 50 Ohm |
| +50 |
70.7 |
100 |
-10 |
70.7-3 |
100-6 |
-70 |
70.7-6 |
100-12 |
-130 |
70.7-9 |
100-18 |
|
| +49 |
63.0 |
79.4 |
-11 |
63.0-3 |
79.4-6 |
-71 |
63.0-6 |
79.4-12 |
-131 |
63.0-9 |
79.4-18 |
|
| +48 |
56.2 |
63.1 |
-12 |
56.2-3 |
63.1-6 |
-72 |
56.2-6 |
63.1-12 |
-132 |
56.2-9 |
63.1-18 |
50.0 -6 = 50.0 x 10 -6 |
| +47 |
50.0 |
50.1 |
-13 |
50.0-3 |
50.1-6 |
-73 |
50.0-6 |
50.1-12 |
-133 |
50.0-9 |
|
| +46 |
44.6 |
39.8 |
-14 |
44.6-3 |
39.8-6 |
-74 |
44.6-6 |
39.8-12 |
-134 |
44.6-9 |
39.8-18 |
|
| +45 |
39.8 |
31.6 |
-15 |
39.8-3 |
31.6-6 |
-75 |
39.8-6 |
31.6-12 |
-135 |
39.8-9 |
31.6-18 |
|
| +44 |
35.4 |
25.1 |
-16 |
35.4-3 |
25.1-6 |
-76 |
35.4-6 |
25.1-12 |
-136 |
35.4-9 |
25.1-18 |
-3 milli |
| +43 |
31.6 |
20.0 |
-17 |
31.6-3 |
20.0-6 |
-77 |
31.6-6 |
20-12 |
-137 |
31.6-9 |
20.0-18 |
-6 micro |
| +42 |
28.2 |
15.9 |
-18 |
28.2-3 |
15.9-6 |
-78 |
28.2-6 |
15.9-12 |
-138 |
28.2-9 |
15.9-18 |
-9 nano |
| +41 |
25.1 |
12.6 |
-19 |
25.1-3 |
12.6-6 |
-79 |
25.1-6 |
12.6-12 |
-139 |
25.1-9 |
12.6-18 |
-12 pico |
| +40 |
22.4 |
10.0 |
-20 |
22.4-3 |
10.0 50.1-18 |
|
| -80 |
22.4-6 |
10-12 |
-140 |
22.4-9 |
10.0-18 |
-15 femto |
| +39 |
19.9 |
7.94 |
-21 |
19.9-3 |
7.94-6 |
-81 |
19.9-6 |
7.94-12 |
-141 |
19.9-9 |
7.94-18 |
-18 atto |
| +38 |
17.8 |
6.31 |
-22 |
17.8-3 |
6.31-6 |
-82 |
17.8-6 |
6.31-12 |
-142 |
17.8-9 |
6.31-18 |
|
| +37 |
15.8 |
5.01 |
-23 |
15.8-3 |
5.01-6 |
-83 |
15.8-6 |
5.01-12 |
-143 |
15.8-9 |
5.01-18 |
limit of sensitivity |
| +36 |
14.1 |
3.98 |
-24 |
14.1-3 |
3.98-6 |
-84 |
14.1-6 |
3.98-12 |
-144 |
14.1-9 |
3.98-18 |
500Hz band - 147dBm |
| +35 |
12.6 |
3.16 |
-25 |
12.6-3 |
3.16-6 |
-85 |
12.6-6 |
3.16-12 |
-145 |
12.6-9 |
3.16-18 |
band 2500Hz -140dBm |
| +34 |
11.2 |
2.51 |
-26 |
11.2-3 |
2.51-6 |
-86 |
11.2-6 |
2.51-12 |
-146 |
11.2-9 |
2.51-18 |
s/n=0 dB |
| +33 |
9.99 |
1.99 |
-27 |
9.99-3 |
1.99-6 |
-87 |
9.99-6 |
1.99-12 |
-147 |
9.99-9 |
1.99-18 |
|
| +32 |
8.90 |
1.58 |
-28 |
8.9-3 |
1.58-6 |
-88 |
8.9-6 |
1.58-12 |
-148 |
8.9-9 |
1.58-18 |
RX at 2500Hz s/w 10dB |
| +31 |
7.93 |
1.26 |
-29 |
7.93-3 |
1.26-6 |
-89 |
7.93-6 |
1.26-12 |
-149 |
7.93-9 |
1.26-18 |
has 0.2 µV or -121 dBm |
| +30 |
7.07 |
1.0 |
-30 |
7.07-3 |
1.0-6 |
-90 |
7.07-6 |
1.0-12 |
-150 |
7.07-9 |
1.0-18 |
at s/n 0 dB -121-10 = -131 dBm |
| +29 |
6.30 |
0.79 |
-31 |
6.3-3 |
0.79-6 |
-91 |
6.3-6 |
0.79-12 |
dBm |
V |
W |
noise figure F = |
| +28 |
5.62 |
0.63 |
-32 |
5.62-3 |
0.63-6 |
-92 |
5.62-6 |
0.63-12 |
|
|
|
-131- (-140) =9dB |
| +27 |
5.01 |
0.5 |
-33 |
5.01-3 |
0.5-6 |
-93 |
5.01-6 |
0.5-12 |
|
|
|
|
| +26 |
4.46 |
0.4 |
-34 |
4.46-3 |
0.4-6 |
-94 |
4.46-6 |
0.4-12 |
|
|
|
we have F=3 dB |
| +25 |
3.98 |
0.32 |
-35 |
3.98-3 |
0.32-6 |
-95 |
3.98-6 |
0.32-12 |
|
|
|
at 2500Hz s/n =0 dB |
| +24 |
3.54 |
0.25 |
-36 |
3.54-3 |
0.25-6 |
-96 |
3.54-6 |
0.25-12 |
|
|
|
3+(-140) = -137 dBm |
| +23 |
3.16 |
0.2 |
-37 |
3.16-3 |
0.2-6 |
-97 |
3.16-6 |
0.2-12 |
|
|
|
at s/n= 10 dB |
| +22 |
2.82 |
0.16 |
-38 |
2.82-3 |
0.16-6 |
-98 |
2.82-6 |
0.16-12 |
|
|
|
-137+10 = -127dBm =99.9nV |
| +21 |
2.51 |
0.13 |
-39 |
2.51-3 |
0.13-6 |
-99 |
2.51-6 |
0.13-12 |
|
|
|
|
| +20 |
2.24 |
0.1 |
-40 |
2.24-3 |
0.1-6 |
-100 |
2.24-6 |
0.1-12 |
|
|
|
IP3=0.5(P1- Pimp3) + P1 |
| +19 |
1.99 |
79.4-3 |
-41 |
1.99-3 |
79.4-9 |
-101 |
1.99-6 |
79.4-15 |
|
|
|
P1 - power of one tone dBm |
| +18 |
1.78 |
63.1-3 |
-42 |
1.78-3 |
63.1-9 |
-102 |
1.78-6 |
63.1-15 |
|
|
|
Pimp3 - product power |
| +17 |
1.58 |
50.1-3 |
-43 |
1.58-3 |
50.1-9 |
-103 |
1.58-6 |
50.1-15 |
|
|
|
intermode dBm |
| +16 |
1.41 |
39.9-3 |
-44 |
1.41-3 |
39.9-9 |
-104 |
1.41-6 |
39.9-15 |
|
|
|
|
| +15 |
1.26 |
31.6-3 |
-45 |
1.26-3 |
31.6-9 |
-105 |
1.26-6 |
31.6-15 |
|
|
|
DB3 = 2 (IP3 - Prf) / 3 |
| +14 |
1.12 |
25.1-3 |
-46 |
1.12-3 |
25.1-9 |
-106 |
1.12-6 |
25.1-15 |
|
|
|
Prf - sensing at s/n = 0 dB in dBm |
| +13 |
0.99 |
20.0-3 |
-47 |
0.99-3 |
20.0-9 |
-107 |
0.99-6 |
20.0-15 |
|
|
|
|
| +12 |
0.89 |
15.9-3 |
-48 |
0.89-3 |
15.9-9 |
-108 |
0.89-6 |
15.9-15 |
|
|
|
respect sign +dBm or -dBM |
| +11 |
0.79 |
12.6-3 |
-49 |
0.79-3 |
12.6-9 |
-109 |
0.79-6 |
12.6-15 |
|
|
|
|
| +10 |
0.71 |
10.0-3 |
-50 |
0.71-3 |
10.0-9 |
-110 |
0.71-6 |
10.0-15 |
|
|
|
|
| +9 |
0.63 |
7.94-3 |
-51 |
0.63-3 |
7.94-9 |
-111 |
0.63-6 |
7.94-15 |
|
|
|
VWR=50ohm |
| +8 |
0.56 |
6.31-3 |
-52 |
0.56-3 |
6.31-9 |
-112 |
0.56-6 |
6.31-15 |
|
|
|
|
| +7 |
0.5 |
5.01-3 |
-53 |
0.5-3 |
5.01-9 |
-113 |
0.5-6 |
5.01-15 |
|
|
|
|
| +6 |
0.45 |
3.98-3 |
-54 |
0.45-3 |
3.98-9 |
-114 |
0.45-6 |
3.98-15 |
|
|
|
|
| +5 |
0.4 |
3.16-3 |
-55 |
0.4-3 |
3.16-9 |
-115 |
0.4-6 |
3.16-15 |
|
|
|
|
| +4 |
0.35 |
2.51-3 |
-56 |
0.35-3 |
2.51-9 |
-116 |
0.35-6 |
2.51-15 |
|
|
|
|
| +3 |
0.32 |
2.0-3 |
-57 |
0.32-3 |
2.0-9 |
-117 |
0.32-6 |
2.0-15 |
|
|
|
|
| +2 |
0.28 |
1.59-3 |
-58 |
0.28-3 |
1.59-9 |
-118 |
0.28-6 |
1.59-15 |
|
|
|
|
| +1 |
0.25 |
1.26-3 |
-59 |
0.25-3 |
1.26-9 |
-119 |
0.25-6 |
1.26-15 |
|
|
|
73 de RZ3QS |
| 0 |
0.22 |
1.0-3 |
-60 |
0.22-3 |
1.0-9 |
-120 |
0.22-6 |
1.0-15 |
|
|
|
|
| dBm |
V |
W |
dBm |
V |
W |
dBm |
V |
W |
|
|
|
|
Author: Prytkov Igor; Publication: cxem.net
See other articles Section Measuring technology.
Read and write useful comments on this article.
<< Back
Latest news of science and technology, new electronics:
Machine for thinning flowers in gardens
02.05.2024
In modern agriculture, technological progress is developing aimed at increasing the efficiency of plant care processes. The innovative Florix flower thinning machine was presented in Italy, designed to optimize the harvesting stage. This tool is equipped with mobile arms, allowing it to be easily adapted to the needs of the garden. The operator can adjust the speed of the thin wires by controlling them from the tractor cab using a joystick. This approach significantly increases the efficiency of the flower thinning process, providing the possibility of individual adjustment to the specific conditions of the garden, as well as the variety and type of fruit grown in it. After testing the Florix machine for two years on various types of fruit, the results were very encouraging. Farmers such as Filiberto Montanari, who has used a Florix machine for several years, have reported a significant reduction in the time and labor required to thin flowers.
... >>
Advanced Infrared Microscope
02.05.2024
Microscopes play an important role in scientific research, allowing scientists to delve into structures and processes invisible to the eye. However, various microscopy methods have their limitations, and among them was the limitation of resolution when using the infrared range. But the latest achievements of Japanese researchers from the University of Tokyo open up new prospects for studying the microworld. Scientists from the University of Tokyo have unveiled a new microscope that will revolutionize the capabilities of infrared microscopy. This advanced instrument allows you to see the internal structures of living bacteria with amazing clarity on the nanometer scale. Typically, mid-infrared microscopes are limited by low resolution, but the latest development from Japanese researchers overcomes these limitations. According to scientists, the developed microscope allows creating images with a resolution of up to 120 nanometers, which is 30 times higher than the resolution of traditional microscopes. ... >>
Air trap for insects
01.05.2024
Agriculture is one of the key sectors of the economy, and pest control is an integral part of this process. A team of scientists from the Indian Council of Agricultural Research-Central Potato Research Institute (ICAR-CPRI), Shimla, has come up with an innovative solution to this problem - a wind-powered insect air trap. This device addresses the shortcomings of traditional pest control methods by providing real-time insect population data. The trap is powered entirely by wind energy, making it an environmentally friendly solution that requires no power. Its unique design allows monitoring of both harmful and beneficial insects, providing a complete overview of the population in any agricultural area. “By assessing target pests at the right time, we can take necessary measures to control both pests and diseases,” says Kapil ... >>
| Random news from the Archive Canon Dual Lens for VR Content Capturing
11.10.2021
The Japanese manufacturer of photographic equipment Canon has announced an unusual lens for branded cameras of the EOS R series. This is a double fisheye lens with a focal length of 5,2 mm and aperture of f/2.8. The device is designed for shooting materials in VR mode. The manufacturer positions the lens as a premium level L optics.
It is the world's first digital interchangeable lens that can capture 180° stereoscopic images and project them onto a single camera sensor. The Oculus Quest 2 headset should be the target device for playing content captured with this lens.
The best shooting mode with this device will be video in 8K resolution. This format is supported by the EOS R5. The developers have already released firmware update 1.5.0, as well as the Premiere Pro plug-in and a separate file conversion application called EOS VR Utility.
The lens will hit the market for $1999, while the EOS R5 will be available for $3899.
|
Other interesting news:
▪ Intel will teach TVs to recognize people
▪ High speed motor driver IRMCK201/203
▪ Planet with three suns
▪ The range of an electric car depends on the temperature outside
▪ Battery Power System for NB-IoT Wireless LTE Module
News feed of science and technology, new electronics
Interesting materials of the Free Technical Library:
▪ section of the Electrician website. PTE. Article selection
▪ article Phedre. Famous aphorisms
▪ article How high is the seventh heaven? Detailed answer
▪ article The driver of the rolling unit in the production of wallpaper. Standard instruction on labor protection
▪ article Noise suppression surge protector. Encyclopedia of radio electronics and electrical engineering
▪ article at the end. Focus Secret
Leave your comment on this article:
All languages of this page
Home page | Library | Articles | Website map | Site Reviews
www.diagram.com.ua
2000-2024
Arabic
Bengali
Chinese
English
French
German
Hebrew
Hindi
Italian
Japanese
Korean
Malay
Polish
Portuguese
Spanish
Turkish
Ukrainian
Vietnamese