Эксперт Электроникс - Expert Electronics - Тема: S3 signal without Antenna (1/1)

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This category was created to discuss various questions and topics regarding ExpertSDR3 operation.

ТЕМА: S3 signal without Antenna

Signal without Antenna 03 Авг 2022 16:29 #1

XV9BPO Вне сайта Сообщений: 12	Hi guys, Just wondering. Is it normal that even without antenna the signal does not go below S3 or around -111.7dbm ? I am using ESDR3 0.12.1 Thanks for your help
	Последнее редактирование: 03 Авг 2022 16:30 от XV9BPO. Администратор запретил публиковать записи гостям.

Signal without Antenna 03 Авг 2022 18:53 #2

N8SDR
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XV9BPO пишет:

Hi guys,

Just wondering.
Is it normal that even without antenna the signal does not go below S3 or around -111.7dbm ?
I am using ESDR3 0.12.1
Thanks for your help

YES, a true direct sampling SDR will always have / show a noise figure

you notice if you engage the preamps the noise floor without antenna will decrease as well again this is correct

it is created from the components

Please do not email me and ask for help I no longer will be part of this, If I could delete /remove my profile I would do so.

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Спасибо сказали: Rome

Signal without Antenna 03 Авг 2022 20:31 #3

W3FRG Вне сайта Сообщений: 10 Спасибо получено: 3	Hello, Regarding the S5 S-Meter reading, one of the best explanations I've seen is on the Flex site. Back before I upgraded to the Dx, my 6600M did this and I also asked the same question. The explanation can be seen here: community.flexradio.com/discussion/5523377/why-does-my-s-meter-read-s5-all-the-time GL Tom W3FRG
	Администратор запретил публиковать записи гостям. Спасибо сказали: Rome, g7mns

Signal without Antenna 03 Авг 2022 20:42 #4

XV9BPO Вне сайта Сообщений: 12	Thanks to both of you for your answers
	Администратор запретил публиковать записи гостям.

Overall software operation

S3 signal without Antenna

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