ExtIO_RTLSDR# - custom ExtIO for RTLSDR

Main forum to discuss RTL-SDR related topics.
dlritter
Posts: 46
Joined: Mon Nov 23, 2015 1:08 am

Re: ExtIO_RTLSDR# - custom ExtIO for RTLSDR

Post by dlritter » Fri Dec 13, 2019 7:43 pm

The latest version of SDRuno (ver 1.33)is shipping with SDRuno.EXTIO.exe (ver1.05)again included.
So we don't have to keep 2 separate installs

ik3jls
Posts: 2
Joined: Fri Dec 13, 2019 7:26 am

Re: ExtIO_RTLSDR# - custom ExtIO for RTLSDR

Post by ik3jls » Mon Dec 16, 2019 11:12 am

OK, now SDRuno works (extio.dll copied in to Documents folder).
Just another question: how is possible to reduce the RF gain ?
In particular on low hf bands where the noise is so high.
Many thanks
Nicola

qrp
Posts: 45
Joined: Wed May 22, 2019 11:16 pm

Re: ExtIO_RTLSDR# - custom ExtIO for RTLSDR

Post by qrp » Mon Dec 16, 2019 10:29 pm

ik3jls wrote:
Mon Dec 16, 2019 11:12 am
how is possible to reduce the RF gain ?
In particular on low hf bands where the noise is so high.
There is no way to tune gain for direct sampling mode on RTLSDR dongle. Because there is no hardware which allows to change gain. Gain can be tuned for tuner, which is not used in direct sampling mode. So, the only way to change gain for HF band is to add external attenuator or LNA.

urbi
Posts: 1
Joined: Sat Jun 13, 2020 9:07 am

ExtIO_RTLSDR# - custom ExtIO for RTLSDR - BiasT for 14 MHz and above?

Post by urbi » Sat Jun 13, 2020 9:20 am

Hello QRP,
I am using your ExtIO_RTLSDR_u8.dll 1.1.1.7 together with HDSDR and a RTLSDR dongle. All works well so far. However, I have one question: Would it be possible that you program a special version of that dll file, with the following additional functionality: BiasT shall be automatically enabled for frequencies from 14 MHz and above, and shall automatically be disabled again when switching to frequencies below 14 MHz.
Why do I need that? I have a switchable pre-filter which I need to put in for 20m band and above (reduction of noise from 49m and 41m AM broadcast bands). So, if I had BIasT being enabled for 14 MHz and above, I could make also this toggling to become fully automatic.
Regards,
Urbi

pavlik1
Posts: 1
Joined: Thu Jun 18, 2020 9:19 am

Re: ExtIO_RTLSDR# - custom ExtIO for RTLSDR

Post by pavlik1 » Thu Jun 18, 2020 9:22 am

Hello

I am struggling to find version 1.22.

the only one I can find is SDRplay_SDRuno_Installer_1.33.exe

Please kindly send me the old version to my email or send me a link

Thank you

lada21011 at yahoo com

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