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Belka-DSP КВ-приёмник размером почти со спичечный коробок

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Channel: Радиоканал с Алексеем Игониным

hamradio

Amateur Radio (Hobby)

радиосвязь

радиолюбительство

радиолюбители

радиостанция

рация

КВ

УКВ

QSO

transceiver

трансивер

belka-dsp

приёмник

генератор

радиостанции

belkadsp

sdr

00:00:02

disc receiver I really like how it works it

00:00:04

takes almost like a full-fledged

00:00:06

short low transceiver like radio stations

00:00:08

they are like household Chinese receivers

00:00:10

I already told you about it in detail in a

00:00:13

separate video there were a

00:00:15

lot of comments written on that video except for the

00:00:16

whining about prices then the main two

00:00:19

questions in these comments were:

00:00:21

does this receiver work with a

00:00:22

full-size antenna and what is its

00:00:24

sensitivity and the sensitivity is what I

00:00:26

want to talk about in this video we will measure

00:00:29

the sensitivity of this receiver we will evaluate the

00:00:30

sensitivity using the niro

00:00:32

taro vachegi the squirrel disk receiver has a highly

00:00:42

intelligent antenna input which allows

00:00:44

it to work with short antennas,

00:00:46

for example, with a telescope antenna, which is

00:00:48

included with this receiver to receive

00:00:50

any radio frequencies, but this does not prevent

00:00:53

us from measuring the sensitivity of the receiver using

00:00:55

usually a high-frequency generator

00:00:56

whose output impedance is all that

00:00:58

I will use a Chinese

00:01:00

high-frequency generator which I

00:01:02

also give you already told in a separate video

00:01:03

I will feed the signal from the output of this

00:01:06

generator to the input of the receiver

00:01:07

directly through the connecting

00:01:09

cable without any attenuator

00:01:11

off

00:01:12

low-frequency output of the receiver I

00:01:14

will use a splitter to connect to

00:01:16

two loads, one of them is ordinary

00:01:17

headphones on which I will listen

00:01:19

and controls how the signal from

00:01:21

the generator is heard and the second load is the input

00:01:24

of the audiorecorder, which will

00:01:25

record the sound that is heard in

00:01:27

the video, the signal is conditional -18 for you this is

00:01:32

an approximate you are windy you are full at the input of the

00:01:34

state receivers 40-meter amateur

00:01:37

band

00:01:45

this is the level of signal heard on this

00:01:46

receiver speech in single-sideband modulation it would

00:01:48

probably be intelligible, but for

00:01:51

comparison, let's see how a signal with a

00:01:53

level of one game level

00:01:55

[applause] is heard,

00:02:03

one microvolt is very loud,

00:02:05

even a meter showed something, and now

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let's listen to a very weak signal

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minus 123 dBm, this is about 0 16

00:02:11

microvolts and for for whom it would be a

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normal weak signal, however, usually the

00:02:15

noise level is much greater than this

00:02:17

value, but still give listen

00:02:23

[music]

00:02:31

such a level is already audible very weakly

00:02:33

speech in single-sideband modulation would

00:02:35

probably be poorly intelligible inaudible it

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turns out that the sensitivity of

00:02:39

this receiver is somewhere then it is in the

00:02:41

region of 0203 microvolts, or maybe you are looking for the fact

00:02:43

that you do not trust such a Chinese

00:02:45

high-frequency generator with

00:02:47

which I assessed the sensitivity, you are

00:02:49

in vain, the generators work normally, I have

00:02:51

already used it many times and

00:02:52

compared, among other things, the

00:02:54

signal level with other generators,

00:02:56

more or less corresponds sufficiently for such

00:02:58

experiments,

00:02:59

but still, if in

00:03:01

doubt, let's check the

00:03:03

sensitivity of the receiver using another

00:03:04

generator of the domestically

00:03:06

produced generator g4 151, I set it to the

00:03:09

same output signal level

00:03:10

03 microvolts and which was clearly

00:03:13

audible by the receivers and listen to it using the

00:03:15

receiver at the word generator g 451 there are no

00:03:18

such weak output signal levels

00:03:20

as 03 microvolts and therefore I had to

00:03:22

use an external divider by 20

00:03:24

decibels

00:03:25

[applause]

00:03:32

03 microvolts and you can hear the same as from a

00:03:34

Chinese generator

00:03:37

[applause]

00:03:41

and at a level of 1 microvolt there is no difference between the

00:03:43

generators either

00:03:45

the beat with a meter is about the same

00:03:47

show now let's evaluate the

00:03:49

sensitivity of the receiver at the very

00:03:50

top to in the frequency range 29

00:03:53

600

00:03:59

03 microvolts is heard approximately the same as

00:04:01

at 7 megahertz but still a little

00:04:03

weaker

00:04:06

[applause] the

00:04:10

lower operating frequency of the receiver

00:04:12

is stated by the developer 3 splines and hertz,

00:04:14

but in reality the indicator is set to

00:04:16

a value less than 3 layers megahertz, let's

00:04:19

first estimate the sensitivity at three and a

00:04:21

half at the lower operating state and

00:04:23

then see how

00:04:24

the sensitivity drops by lowering the frequency

00:04:30

[applause]

00:04:37

by three and a half megahertz, our 03

00:04:39

microvolts are heard perfectly just like

00:04:41

at 7 hertz maybe even a little

00:04:43

better it seemed to me, but at 1 and 8

00:04:45

megahertz and a signal with this level is

00:04:47

not received by this receiver at all, they are

00:04:49

not detected at all,

00:04:51

look

00:05:01

now I will increase the signal level to 10

00:05:04

microvolts, it will be audible by the receiver

00:05:06

at least somehow but this does not mean that the

00:05:07

sensitivity of the receiver is 10

00:05:09

microvolts on this range at 160

00:05:11

meters when working with a short antenna, that

00:05:14

is, when using the receiver input

00:05:15

as highly as possible, 4 thousand will be even worse

00:05:18

because this band filter,

00:05:20

which cuts off our sensitivity to

00:05:22

this in the range, it does not provide the

00:05:24

transmission of high input impedance

00:05:26

is at the end of the receiver, so the

00:05:28

real sensitivity at 160 meters

00:05:31

on a short antenna will be even worse when a

00:05:33

full-size antenna is turned on; yes, there

00:05:35

will be such an example of sensitivity as

00:05:36

we see now with the generator, it is an

00:05:38

Anton box, it will be even worse, look at 10

00:05:40

microvolts

00:05:41

at 160 meters range

00:05:44

[ applause]

00:05:48

and at the end of our measurement,

00:05:50

sensitivity, or rather an estimate of the

00:05:52

sensitivity of the protein disc receiver, let

00:05:53

's see how it receives a signal with a

00:05:56

level of 03 microvolts and at a frequency of 2,900,

00:05:59

maybe someone is interested in this cleanliness, it

00:06:00

will be possible to listen to the sensitivity

00:06:01

there is already weaker than 3 spline megahertz,

00:06:04

but still it is still acceptable for

00:06:05

receiving signals from real signals from

00:06:08

the air to a telescopic antenna box,

00:06:11

listen to the state 2,900 signal level 03

00:06:14

micro ultra let

00:06:23

's finish measuring the

00:06:25

sensitivity of the receiver I want to

00:06:27

tell you again that I really like how

00:06:28

this receiver works, I have had

00:06:31

many different radio equipment what

00:06:32

to compare with, so I compare the

00:06:34

reception quality of this receiver with a normal one with

00:06:36

good

00:06:37

card quality transfers, for example,

00:06:39

listening to Chinese household receivers with the

00:06:41

ability to receive in I don’t like, I

00:06:44

won’t listen to them, but I listen to this receiver

00:06:46

with pleasure

00:06:47

under various circumstances and carry them

00:06:49

on headphones in which everyone can clearly

00:06:51

hear very clearly on a speaker somewhere in

00:06:53

the forest and in the city I really like how

00:06:55

this receiver works; you

00:06:57

can also watch a separate review about this receiver

00:06:59

on my channel, but for now that’s all

00:07:01

thanks for watching this video,

00:07:03

listen to the broadcast using different

00:07:05

receivers, watch my video,

00:07:07

like, subscribe to the channel,

00:07:09

VKontakte group, Alexey Ivonin was here,

00:07:12

goodbye

Description:

Обзор приёмника: https://www.youtube.com/watch?v=omwOunqYqk4 Ссылки на генератор: http://ali.pub/2z7mmw http://ali.pub/301q6e Заказать приемник можно на http://psmdpro.meximas.com/belka/ через форму обратной связи (значок с конвертом). Обзор китайского ВЧ-генератора: https://www.youtube.com/watch?v=B8N-NaRLTfM Приёмник BELKA-DSP Диапазон частот: 3.5 МГц - 30 МГц. Оцифровка 48 кГц 24 бит Все виды модуляции: CW, SSB, AM, FM В видео показано определение чувствительности приёмника в разных диапазонах частот с помощью ВЧ-генератора. Спасибо за просмотры и подписку! Для помощи каналу и благодарностей: ЯндекДеньги: 410017381931812 PayPal: [email protected] Пишите комментарии, подписывайтесь на мой канал, не пропустите новые видеоролики. Группа ВКонтакте: https://vk.com/igoninalexey Instagram: https://www.facebook.com/unsupportedbrowser

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