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Message from bobdavcav at Thursday, 20-Oct-16 19:07:57 GMT

I don't think you can administratively change it, but users can change it when listening.

Message from legis225 at Thursday, 20-Oct-16 19:11:16 GMT

When it changes on the site, it does not seem to have much effect.

Is there a way to change the mode on v.3 so listeners can listen to HF? This is more of an HF setup than a VHF/UHF.

Message from PaulD at Saturday, 23-Mar-19 06:57:28 GMT

Has anyone tried SDR on HD obviously with the correct antenna? More to the point, is it possible?

Thanks

Paul

Message from Kai at Tuesday, 18-Jun-19 11:25:40 GMT

Hi there, my RTL-SDR V3.0 just arrived in the post (Perth, Western Australia), testing it before taking it home to Broome. So far haven't worked out how to get full spectrum RX coverage, it's either HF, or VHF/UHF, but not both.

Anyone successfully got full spectrum RX to work? please let me know

Message from Ivo at Tuesday, 18-Jun-19 18:37:48 GMT

Kai, this is currently not supported by the GT software, but since this one seems to use the Direct Sampling method for HF, it is possible to switch it in software so I could add that later.

Message from Kai at Thursday, 20-Jun-19 07:56:32 GMT

Thanks Ivo, I've been reading around, trying to find different options.
With the V3 hardware looks like the current config allows only HF with the GT setting "Radio.RTL2832.DirectSampling" set at Q branch, or, VHF/UHF with "Direct"...but no ability to do both at once.

I am not a programmer and unsure how difficult it is likely to be to add a software switch?

Message from Ivo at Monday, 24-Jun-19 19:54:45 GMT

Kai, I think I got it. I can't really test it here as I don't have a proper HF antenna, but if you set DirectSampling to Q branch (or I, whatever the receiver uses), the software should automatically switch at 28 MHz.

Message from Kai at Thursday, 27-Jun-19 13:11:39 GMT

Thanks Ivo! You posted this three days ago, unfortunately I don't get emailed when the thread has a new comment, please accept my apologies for the delay. I've set my radio to Q branch, testing now...

Message from Ivo at Thursday, 27-Jun-19 16:32:53 GMT

Kai, your e-mail address is bouncing e-mails. Let me know (via support or email) if you have a new one or if we should investigate further. Also let me know if the direct sampling switching works for you - I know there are more people with similar receivers on the network.

Message from Kai at Thursday, 27-Jun-19 23:57:15 GMT

Thanks Ivo, I've emailed you as requested.

Thank you for the work with the sample switch, some feedback:

I can't get the noise floor to go below signal strength 40 in most places on the spectrum from 2MHz to 2M metres.

I playd with RF gain to try and reduce the noise floor but it didn't look like it made any difference?

Some FM broadcast stations can be heard in 27MHz and 28MHz, must be an odd-harmonic in there somewhere. ie 27.720MHz (AM @ 50kHz), 27.780 Mhz (AM @ 50kHz), 28.875 MHz (AM @ 50kHz) etc

7.780 Mhz (AM @ 50kHz) has radio 6IX which broadcasts on 1,080AM and 105.7FM.
Ironically I can't "hear" the 1,080AM broadcast or 105.7FM when tuned to thse frequencies but I can hear the harmonic on 27MHz :P

Also, keep seeing this in my logs:
UCIS.USBLib.Communication.LibUsb1.LibUsb1Exception: libusb_bulk_transfer failed with error ERROR_PIPE
at (wrapper managed-to-native) System.Object:__icall_wrapper_mono_delegate_end_invoke (object,intptr)
at (wrapper delegate-end-invoke) <Module>:end_invoke_int__this___IAsyncResult (System.IAsyncResult)
at UCIS.USBLib.Communication.UsbInterface.EndPipeTransfer (System.IAsyncResult asyncResult) [0x00000] in <ea304ada8ac444ab97393983632721f8>:0
at Radio.SDR.RTL2832.RTLSDRDevice.EndReadData (System.IAsyncResult asyncResult) [0x00000] in <cb8bac9bafe34788a6be490dc4a17d7f>:0
RTLSDR2: got empty buffer

and

System.OperationCanceledException: The asynchronous operation failed ---> System.ObjectDisposedException: Cannot access a disposed object.
Object name: 'ActivePmlChannel'.
--- End of inner exception stack trace ---
at UCIS.Pml.ActivePmlChannel.EndReadMessage (System.IAsyncResult asyncResult) [0x00025] in <ea304ada8ac444ab97393983632721f8>:0
at URadioServer.GTCForwardedSocket.EndReadMessage (System.IAsyncResult ar) [0x00000] in <9a32fd9a9e2f4d308d1191d4b3b64a21>:0
at URadioServer.GTController4.ReadMessageCallback (System.IAsyncResult ar) [0x00000] in <9a32fd9a9e2f4d308d1191d4b3b64a21>:0

and

Receiver 100: Controller Icom121: System.OperationCanceledException: The asynchronous operation failed ---> System.ObjectDisposedException: Cannot access a disposed object.
Object name: 'ActivePmlChannel'.
--- End of inner exception stack trace ---
at UCIS.Pml.ActivePmlChannel.EndReadMessage (System.IAsyncResult asyncResult) [0x00025] in <ea304ada8ac444ab97393983632721f8>:0
at URadioServer.GTCForwardedSocket.EndReadMessage (System.IAsyncResult ar) [0x00000] in <9a32fd9a9e2f4d308d1191d4b3b64a21>:0
at URadioServer.GTController4.ReadMessageCallback (System.IAsyncResult ar) [0x00000] in <9a32fd9a9e2f4d308d1191d4b3b64a21>:0

Any assistance you can provide appreciated, thank you :)

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