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AM Operation Using Power SDR with Flex and Other SDR Platforms




 
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Author Topic: AM Operation Using Power SDR with Flex and Other SDR Platforms  (Read 257471 times)
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WD5JKO
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« Reply #75 on: August 28, 2016, 06:31:04 PM »

Jim:
From your attached picture, what's the lower right meter used for in your Flex-3000?

Pete,

  It is a duplicate of the main transmit meter. I like to use the original meter to look at Forward Power, and the 2nd meter to look at one of the audio levels such as EQ.

For those with a F5K with 2nd receiver, the 2nd meter does what it always did. For those of us with a F1.5K or F3k, this 2nd meter function is a nice addition.

Jim
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* Two_meters_F3k.jpg (72.81 KB, 192x758 - viewed 158 times.)

* Two_meters_F3k_.jpg (90.76 KB, 624x419 - viewed 136 times.)
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Pete, WA2CWA
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« Reply #76 on: August 28, 2016, 09:16:32 PM »

I forgot you can bring up the second meter in the transmit profile. I just pulled down T9 (I was running T8) and installed it and diddled with the settings. Works fine. Weeks ago I upgraded the shack PC to Win 10, 64 bit, and added 8 Gig of memory. The machine was running Vista 32 bit with only 3 Gigs of memory and CPU usage was always high. I still would like to find a program that would shut down some processes on the "new" machine that I don't need when I'm running the Flex 5000 and some of the digital programs. I use to run GBOOST on the old machine which worked great but evidently the server(s) that activated the software no longer are functional.
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WD5JKO
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« Reply #77 on: September 08, 2016, 09:56:56 PM »


Pete,

   The use of Win 10 to run radios has been largely successful. Darrin, Ke9NS has a section on his F5K page on Win10, and how to tweak it. There are lots of issues with Win10 though after some of the MS updates and how they impact the SSDR users.

   The T9 PowerSDR up till a few days ago used a Microsoft installer. Therefore to upgrade further you need to uninstall from Control Panel like most any Windows program. Now moving on from here, he has went to a different installer that will not be seen in Control Panel programs list. This is a little confusing.

   Here is a recent post from Darrin showing the current features of his T9 revision of PowerSDR:

https://community.flexradio.com/flexradio/topics/powersdr-2-7-2-ke9ns-revision-t9-available-for-download

Jim
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W1AEX
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« Reply #78 on: January 26, 2017, 12:03:07 PM »

The link below leads to a setup guide for attaining audio level settings that are optimal when adjusting each gain stage in the transmit chain of the PowerSDR mRX PS software. The short story is that while the GUI interface resembles the Flex version of PowerSDR the reality is that the entire transmit audio chain from front-to-back is completely different. The bottom line is that it is absolutely critical to make sure that you are regularly reaching 0dB on voice peaks while transmitting and observing the ALC meter.

This will assure that the Pure Signal algorithm samples your RF signal frequently to allow the adaptive pre-distortion protocol to apply an optimal correction to your output signal. It is almost a worry-free setup as the look-ahead algorithms at the LEVELER and ALC points in the transmit chain of the software make it absolutely impossible to drive the transmitter into clipping. It doesn't matter if your setup is simply a microphone plugged into the front panel, or an audio rack plugged into the rear panel DB25 line level input, or even a VAC setup using DAW audio processing software, getting it right is simple as long as your MIC/VAC, EQ, and LEVELER are adjusted correctly.

Hope this makes it simpler for all the guys who are just starting out!

73,

Rob W1AEX  

http://www.w1aex.com/anantxgain/anantxgain.html
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« Reply #79 on: March 27, 2017, 12:58:22 PM »

A couple of new items for the ANAN platform of SDR rigs:

New firmware release for the Hermes based ANAN-100 rigs (Hermes_v3.2.rbf) available at this link:  

https://github.com/TAPR/OpenHPSDR-Firmware/releases

New OpenHPSDR mRX PS release for all platforms. This incorporates the new Pure Signal 2.0 pre-distortion protocol which is far more robust in its capability to correct problematic linear amplifiers that exhibit memory effects. Additionally, the Pure Signal 2.0 protocol can be enabled via the front panel GUI and will remain toggled on persistently each time OpenHPSDR mRX PS is started up as long as the PS-A button (seen in the upper left of the image below) remains engaged.

https://github.com/TAPR/OpenHPSDR-PowerSDR/releases

New beta release of CuSDR (version 3.3.0 QT5) from Herman. There is no installation for this program, just download the zip file, extract the files to any folder of your choosing and run it from there. I found it necessary to let the program run with admin privileges otherwise I received an error message (The program has stopped working) when it was started. This version does not yet have the WDSP protocol installed, but it looks beautiful, runs smoothly, and is very stable. I was able to open up 5 receivers simultaneously (seen in the second image below) in addition to running the wideband RX display of the spectrum from VLF through 64 MHz.

https://github.com/hvh/cusdr3/files/862159/cusdr3.zip

I made a YouTube video of CuSDR v3.3.0 (QT5.4.0) as I was listening to an AM conversation on 75 meters yesterday. The fidelity of CuSDR is very nice and rivals OpenHPSDR mRX PS when tuning the AM broadcast band.

https://www.youtube.com/watch?v=sYIkvBrSITU

Lots of good stuff to play with!

Rob W1AEX


* v3.3.14 PS2.jpg (156.59 KB, 1247x746 - viewed 68 times.)

* CuSDR v3.3.0 5 receivers.jpg (228.86 KB, 1356x828 - viewed 65 times.)
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« Reply #80 on: June 07, 2017, 01:42:04 PM »

Thanks to the efforts of Warren - NR0V, Doug - W5WC, and Chris - W2PA the user base for OpenHPSDR mRX PS is enjoying a major software upgrade with the release of version 3.4.1 that is now publicly available. Gone are the days when a new release meant you would have to reset your database and then sort through the menus to set everything up again as well as plunging through the tedious task of re-creating your transmit profiles and filter sets. The new v3.4.1 release will import any database you throw at it and migrate everything into a new database that is compatible. To test how smart the new database migration tool is, I went back to databases that I used 3 years ago and it migrated them flawlessly. My biggest surprise was when I went to an old database from my Flex 5000 and it migrated that without a hitch!

Additionally, the version 3.4.1 release contains the long-awaited CFC Audio Tools implementation which offers PRE-EQ, CFC (10 Band Continuous Frequency Compression), POST EQ, Phase Rotator, and an adjustable soft-limiting ALC Max Gain setting. These new audio tools can be used in conjunction with the adjustable soft-limiting leveler, conventional wide-band compressor, and the CESSB option. Of course all the audio options can be further enhanced with the adaptive pre-distortion linearization protocol that reduces the transmit THD from the nominal 2.0 % to .02%.

If that was not enough to play with, version 3.4.1 also adds the ability to transmit AM with one sideband, your choice whether it be the upper or lower sideband.

For those users who are clinging to an old version of OpenHPSDR mRX PS there is absolutely no reason not to upgrade to this one! The developers really hit a home run this time!

73,

Rob W1AEX

Note the setup information in the videos below is applicable to AM and SSB modes:

Quick Setup Guide for the CFC Audio Tools:    https://www.youtube.com/watch?v=l5JmDAaDBVo

Using the new CFC Comp and ALC Comp metering to adjust CFC Pre Comp and Post EQ levels:    https://www.youtube.com/watch?v=o73aAc9oWnw

Adjusting the OpenHPSDR mRX PS Phase Rotator:   https://www.youtube.com/watch?v=NM2x2tk0UbY


* new tx audio chain.jpg (77.71 KB, 1216x754 - viewed 62 times.)

* OpenHPSDR mRX PS v3.4.1 CFC.jpg (142.32 KB, 1400x547 - viewed 56 times.)
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