Date   
Re: FDM-DUO Native VOX?

engineer1@...
 

Thanks for the suggestion. 

When trying RTS, for what ever reason the DUO goes into transmit mode; as if the signals are reversed.  I have the same problem with HRD when trying to use RTS as the PTT control.  Fldigi works as it has a native TS-480 configuration in the Hamlib library and looks to be using CAT commands to control PTT. 

So there is an issue with either RTS control in the DUO firmware or something strange in my system/configuration.  No problems with my various Yaesu transceivers I have in operation so I lean towards the RTS control being broke. 

Anyone els using RTS to control PTT on the DUO?

Thanks - Will - N7IPY

Re: Coherent receiver by using FDM DUO

Henry
 

Hello Roman,

as I said receiver manufacturers should do more research on that subject (multi-RX coherent reception). This is the only chance to convince users to buy new receivers. In a modern RFI polluted environment "classical" receivers with only one "channel" are useless and almost nobody is willing to buy such a receiver. Only multi-RX coherent reception with noise cancelling or beam forming technologies by software could bring back a little of the joy we had in radio listening thirty, fourty years ago. Of course I am aware that such receivers would be more expensive.
73s, Henry

---In elad_sdr_en@..., <consulttelecom@...> wrote :

impossible dream?

Re: Coherent receiver by using FDM DUO

Roman
 

Hi, Henry,

Thank you for your answer!

Hardware has external reference input which (at least in theory) can be used as common clock reference for two RX which also exist in FDM DUO hardware.

You are right, USB is not synchronous interface but we can overcome its disadvantages. There always will be random delays but we can fight these in the software with the use of cross-correlation by receiving known signals by two receivers.

So theoretically it is possible. But I would like to know if there is any progress in this direction if possible. Or are there any hardware constrains in ELAD which make this impossible dream?

Thank you for your thoughts\ideas!

Re: FDM-DUO Native VOX?

Neil Smith G4DBN
 

Sorry, no idea about VOX, but can Winlink use RTS for PTT on the CAT port like most software does?

Neil G4DBN


On 21/11/2016 22:35, engineer1@... [elad_sdr_en] wrote:
 

Does the FDM-DUO have a native or built in VOX?  I can not see where to set it anywhere.  I am trying to configure and operate Winlink-2000 and the application does not support the Kenwood TS480 rig, only partial support so it does not key the radio.  Winlink/WINMOR hear the audio provided by the USB port on the DUO but can not key the radio to transmit.  I can wire a Signalink USB Audio Interface to the radio as it has it's own built in VOX, but that seeks silly as the radio has the built in USB Audio port all ready. 

Any one know if a VOX featur is planned for stand alone operation?

Thanks,  Will - N7IPY





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FDM-DUO Native VOX?

engineer1@...
 

Does the FDM-DUO have a native or built in VOX?  I can not see where to set it anywhere.  I am trying to configure and operate Winlink-2000 and the application does not support the Kenwood TS480 rig, only partial support so it does not key the radio.  Winlink/WINMOR hear the audio provided by the USB port on the DUO but can not key the radio to transmit.  I can wire a Signalink USB Audio Interface to the radio as it has it's own built in VOX, but that seeks silly as the radio has the built in USB Audio port all ready. 

Any one know if a VOX featur is planned for stand alone operation?

Thanks,  Will - N7IPY

Re: DUOr Receiver

Richard Langley
 

According to Barbara Salatin, the sales manager of Elad USA, they will carry it eventually, but can not give an estimated date at this time, due to the modifications the engineers are making to the receiver bandwidth expansion.

The price will be approximately $950.

-- Richard Langley

-----------------------------------------------------------------------------
| Richard B. Langley E-mail: lang@... |
| Geodetic Research Laboratory Web: http://gge.unb.ca/ |
| Dept. of Geodesy and Geomatics Engineering Phone: +1 506 453-5142 |
| University of New Brunswick Fax: +1 506 453-4943 |
| Fredericton, N.B., Canada E3B 5A3 |
| Fredericton? Where's that? See: http://www.fredericton.ca/ |
-----------------------------------------------------------------------------

On Nov 21, 2016, at 4:04 PM, n2ss@... [elad_sdr_en] <elad_sdr_en@...> wrote:



Whatever happened to the DUOr receiver only model? Seems it has been for sale in Europe for some time now but still not offered in the United States. Why is that?

Tony N2SS



Re: Coherent receiver by using FDM DUO

Henry
 

I think this would require a common clock reference for both AD converters and mutiplexing both raw data synchronously over a single interface (USB or LAN). I don't know if this is possible with USB at all as USB has high latency.
Power SDR mRX with the 2 RX Angelia boards has this and it is a great feature for beam forming and noise cancelling.
In time where RFI pollution is growing daily in modern environments receiver manufacturers should invest more research in multi-RX coherent reception and maybe even automatic noise nulling by software.
But I know this is a dream. With Power SDR mRX you can do a little at least manually with the two coherent receivers. I have not heard of an ELAD solution.
73s, Henry


---In elad_sdr_en@..., <consulttelecom@...> wrote :

Can FDM DUO users use two receivers of unit for simultaneous coherent reception of the same frequency band? 

Does anybody here tried to do such things with their ELAD equipment?

DUOr Receiver

n2ss@...
 

Whatever happened to the DUOr receiver only model? Seems it has been for sale in Europe for some time now but still not offered in the United States. Why is that?

Tony N2SS

Coherent receiver by using FDM DUO

Roman
 

Can FDM DUO users use two receivers of unit for simultaneous coherent reception of the same frequency band? 

Does anybody here tried to do such things with their ELAD equipment?


Thank you for sharing your thoughts and experiences!


Roman

Bugs in recording (1.147)

Ralph Brandi
 

I've run across a couple of bugs in recording in the past week or two. This is with the latest beta, 1.147. First, I took my FDM-S2 on a DXpedition weekend before last, and found that in some circumstances, if I was recording and I tried to tune around by entering a frequency, even if I selected tuning frequency instead of local oscillator frequency, the software would change the LO frequency *while I was recording*, corrupting the recorded file and making it impossible to open.  Once an LO frequency is set for an I/Q recording, it should be locked until the recording finishes so that the recording file cannot be corrupted.


Second, I've found a bug back at home, also with 1.147. I have scheduled recordings centered on 1120 kHz over top-of-the-hour during darkness hours. All such recordings are interpreted with an incorrect center frequency, 4 kHz off. I can get the files back to what they're supposed to be by running them through WavHeaderManager and setting the center frequency to 1116 kHz, but the process for doing this is a pain in the neck and shouldn't be needed.

Re: CW Transmit configuration in SW2

carl watterson
 

What transmitter?
Carl

CW Transmit configuration in SW2

cristorcelli@...
 

I need help configuring CW transmit in SW2.

Specifically, when operating SW2 software, what is the configuration needed in order to hear (monitor) the transmitted CW characters through the headset when the headset is configured to be the audio device plugged ito the computer?

73 de NN3VB


Re: CW Monitor On FDM SW2 CW transmit.

Neil Smith G4DBN
 

Hi Charlie, on Set->Audio there is a tickbox for Mute on TX or CAT keyed status which is normally checked.  If you untick that, you get sidetone.  HOWEVER...  you also get the processing delay, so the CW you hear is about 200ms behind what you are sending, and you also get to hear your transmitted voice on SSB, again delayed by 200ms.  I find it completely impossible to use except when I am using computer-keyboard CW.

It ought to be possible to feed sidetone into the soundcard for direct output, but I just use a little analog audio mixer with the sidetone from my external keyer mixed in to the soundcard output.

Neil G4DBN


On 20/11/2016 20:13, cristorcelli@... [elad_sdr_en] wrote:
 

Need some help in configuring SW2 so i hear transmitted CW characters.

In standalone mode, I have the configuration correct. I have Setting# 8 set to of so I can hear when I transmit.

When I activate SW2, and set the output speakers to the computer, I hear received signals in the headphones plugged into the computer.

But nothing I do allows me to hear the side-tones of my  transmitted CW characters in the headphones.

What is the sequence of settings to make that happen?






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CW Monitor On FDM SW2 CW transmit.

cristorcelli@...
 

Need some help in configuring SW2 so i hear transmitted CW characters.

In standalone mode, I have the configuration correct. I have Setting# 8 set to of so I can hear when I transmit.

When I activate SW2, and set the output speakers to the computer, I hear received signals in the headphones plugged into the computer.

But nothing I do allows me to hear the side-tones of my  transmitted CW characters in the headphones.

What is the sequence of settings to make that happen?


Re: 8-pin microphone adapter for Heil Pro Headset

Neil Smith G4DBN
 

Hi Ken, I made up an adaptor for my Pro-7 using a 3.5mm mono inline socket for the mic lead of my existing Kenwood, then used a short end cut off a piece of shielded Cat6 network patch lead with an RJ45.  I added a 1/4 inch in-line socket for the PTT footswitch.  As I use an HC-5 insert, I added a 4.7uF tantalum cap and set the boost to +12dB.  That would not be required with the Heil Icom electret insert of course.

I slipped some glue-lined heatshrink sleeving over the joints and they have been in use for some time with no issues.

Neil G4DBN


On 20/11/2016 17:01, kennyg2482@... [elad_sdr_en] wrote:
 

Long shot here, but does anyone in the group know of an adapter that can be used for the Heil Pro Headset for the FDM-DUO ?

I have found several for the big name radios, but nothing for the DUO.


Thanks es 73

Ken - WD8CCZ





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8-pin microphone adapter for Heil Pro Headset

Kenneth Golubski
 

Long shot here, but does anyone in the group know of an adapter that can be used for the Heil Pro Headset for the FDM-DUO ?

I have found several for the big name radios, but nothing for the DUO.


Thanks es 73

Ken - WD8CCZ

popping noise in audio with FDM-SW2

Allen Grimsley
 

I have popping noise in my computer audio when using FDM-SW2. This is most noticeable  when listening to AM stations in AM, SSB, SAM or ECSS modes. Running  FDM-SW2 Ver 1.147 Beta, but this has been a problem running earlier versions as well. Running Windows 10 with an HP computer that has enough CPU capacity to run at <10% usage rate so that is not the issue. Any ideas?

Re: HC-05 Bluetooth chip stuck in Programming mode.... (Blue DUO)

Chet Roberts
 

OK, thanks to fellow ham and FDM-DUO user Dave Kennett's suggestion, I have a resolution to my problem!
This HC-05 module appears to operate differently than other HC-05 modules I have purchased.
With this version of the HC-05:
1) There is no flashing blue LED by the antenna end
2) It automatically goes into Programming mode when a wire is attached to the EN pin on the chip.
When the wire is removed from EN pin, the module goes into Operate mode.
I was then able to find the BLUEDUO signal on my Android device.
This info may be useful info for others....
Chet K8KIZ

DxLauncher

greggilbert195@...
 

Hi Group. 



Would like to scan frequencies that Multipsk provides using my Elad FDM-SW2 SDR with Commander from DXLauncher197. Receiving only. Using Yaesu FT897 CAT to control the SW2 on Com port pairs 3 and 4. 

Multipsk shows Connected into Commander. Under QRGs in Multipsk clicking on a frequency the Commander VFO correctly changes to the frequency that is in database. 



So my problem is how do I sent the CAT command to the SW2 to change frequencies from Multipsk via Commander? 



Thank you for your interest. 



Greg 


HC-05 Bluetooth chip stuck in Programming mode.... (Blue DUO)

Chet Roberts
 

I wanted to program a couple more HC-05 Bluetooth chips for some fellow hams, but unlike my earlier purchases, these chips start in Programming mode (slow flashing red LED) and I cannot figure out how to get them into OPERATE mode.  These are the chips that have the tiny microswitch on the board.
I'm using a Raspberry Pi running Cutecom to do the programming.
Thoughts?
Chet K8KIZ