Re: [Flexradio] A question about PA calibration
As Eric says, this is system dependent, but I'll share what I have gotten to work for me. Use at your own risk. If we get the forums going again, a forum for system setup configurations would be nice and convenient. I primarily work SSB and digital modes. No CW. I have VAC working very well with MixW, Digipan CWget without any of the audio popping I was experiencing on TX. I still get multiple BSoDs daily from the VAC system driver when switching VAC in and out from the PowerSDR console. All correspondences to date to the VAC author have not resulted in a reply. I guess I'll have to write up the problem in Russian. Hardware: SDR1K w/ 100 watt PA Delta 44 w/ Eric2's filtered breakout box replacement PC Homebrew using Asus mobo with AMD Athlon 64 dual-core 4400+ wit 1 GB Ram. Hardware RAID 1 SATA hard drives (2) Delta 44 s/c O/S Configuration: Windows Server 2003 Standard (w/ all the patches) Sound Playback Default device: Virtual Cable 1 Out Sound Recording Default device: Virtual Cable 2 In Using 64-bit beta Delta 44 driver 5.10.00.0051 VAC configuration: 2 VAC cables - Mode async, 20 ms per interrupt, sample rate 24000 Delta 44 Control Panel configuration: DMA Buffer size: 2048 Signal levels set as recommended PowerSDR: Audio-Soundcard-Buffer Size: 2048 Audio-Soundcard-Sound Card Selection: Delta44 (using defaults) Audio-VAC-Buffer Size: 2048 Audio-VAC-Sample Rate: 24000 Audio-VAC-Virtual Audio Cable Setup-Driver: MME Audio-VAC-Virtual Audio Cable Setup-Input: Virtual Cable 1 In Audio-VAC-Virtual Audio Cable Setup-Output: Virtual Cable 2 Out -Tim --- Tim Ellison ( [EMAIL PROTECTED] ) Integrated Technical Services ( http://www.itsco.com ) -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Eric Wachsmann - FlexRadio Sent: Tuesday, December 06, 2005 5:35 PM To: 'Jeff Anderson'; FlexRadio@flex-radio.biz Subject: Re: [Flexradio] A question about PA calibration It depends on the system, but a good set of general defaults are: Audio: 2048 DSP: 1024 Delta 44 DMA: 512 These can be adjusted downward depending on system speed and latency/filter requirements. Eric Wachsmann FlexRadio Systems -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] radio.biz] On Behalf Of Jeff Anderson Sent: Tuesday, December 06, 2005 4:29 PM To: FlexRadio@flex-radio.biz Subject: Re: [Flexradio] A question about PA calibration Just in case things should ever get screwed up in the computer here - what should be the default/recommended settings of the various buffers? Thanks! - Jeff, WA6AHL -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Eric Wachsmann - FlexRadio Sent: Tuesday, December 06, 2005 2:14 PM To: 'Tim Ellison'; FlexRadio@flex-radio.biz Subject: Re: [Flexradio] A question about PA calibration I have witnessed this myself, and yet could not reproduce it or tie it to any other single application. If you find out what did it, please let us know. Another key setting to check is the DMA Buffer Size on that same tab. This was set to 2048 at the same time the output got changed in my experience. Eric Wachsmann FlexRadio Systems -Original Message- From: Tim Ellison [mailto:[EMAIL PROTECTED] Sent: Tuesday, December 06, 2005 3:57 PM To: [EMAIL PROTECTED]; FlexRadio@flex-radio.biz Subject: RE: [Flexradio] A question about PA calibration And I again lay prostrate to the Master. :-) This explains several things I have observed recently. I had originally used the quick start guide for the initial setup. I had not changed anything in the D44 control panel, but lo and behold the settings had changed. I'm not sure what application I ran that did it, but I now know what to look for. Thanks Eric. -Tim --- Tim Ellison ( [EMAIL PROTECTED] ) Integrated Technical Services ( http://www.itsco.com ) -Original Message- From: Eric Wachsmann - FlexRadio [mailto:[EMAIL PROTECTED] Sent: Tuesday, December 06, 2005 4:12 PM To: Tim Ellison; FlexRadio@flex-radio.biz Subject: RE: [Flexradio] A question about PA calibration Yes. The larger values indicate that something is seriously wrong. It sounds like the soundcard is setup for +4 dBU output (instead of -10dBv). Look at the Delta 44 Control Panel on the Hardware Settings Tab. This needs to look just like the pictures shown in the Delta 44 Quick Start guide seen here: www.flex-radio.com/delta44/delta44.htm. Eric -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] radio.biz] On Behalf Of Tim Ellison Sent: Tuesday, December 06, 2005 3:00 PM To: FlexRadio@flex-radio.biz Subject: [Flexradio] A question about PA calibration First off, I am not having any problems running the PA calibration routine. It works fine. The PA gain test results I received with the radio all fall in a range between
Re: [Flexradio] A question about PA calibration
This is why I stated general defaults. These settings will work for nearly all systems. Optimal settings will vary per system/soundcard. ;) As with most systems, to get the most out of the PowerSDR software, you will need to crack open the manual and learn what a few of the controls do. Specifically, check out the buffer size controls. The advantages of higher/lower settings are detailed. Eric Wachsmann FlexRadio Systems -Original Message- From: ab7r [mailto:[EMAIL PROTECTED] Sent: Tuesday, December 06, 2005 6:43 PM To: [EMAIL PROTECTED]; 'Jeff Anderson'; FlexRadio@flex-radio.biz Subject: RE: [Flexradio] A question about PA calibration This is not true for all modes and systems. For CW, it seems 512 across the board works best for me. That is why I recommended savable user profiles. This was just before the TX profiles became available on the transmit tab. But an even better solution would be to have selectable buttons along the top menu bar. These can be named according to user preference and should save ALL parameters of the radio, not just tx. So if I want to work CW, I can click on the CW profile and make whatever changes I want and apply them. There could also be an option button to apply them based upon mode button selection. Just a thought, but seems to make sense to me. Greg AB7R -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Eric Wachsmann - FlexRadio Sent: Tuesday, December 06, 2005 2:35 PM To: 'Jeff Anderson'; FlexRadio@flex-radio.biz Subject: Re: [Flexradio] A question about PA calibration It depends on the system, but a good set of general defaults are: Audio: 2048 DSP: 1024 Delta 44 DMA: 512 These can be adjusted downward depending on system speed and latency/filter requirements. Eric Wachsmann FlexRadio Systems -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] radio.biz] On Behalf Of Jeff Anderson Sent: Tuesday, December 06, 2005 4:29 PM To: FlexRadio@flex-radio.biz Subject: Re: [Flexradio] A question about PA calibration Just in case things should ever get screwed up in the computer here - what should be the default/recommended settings of the various buffers? Thanks! - Jeff, WA6AHL -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Eric Wachsmann - FlexRadio Sent: Tuesday, December 06, 2005 2:14 PM To: 'Tim Ellison'; FlexRadio@flex-radio.biz Subject: Re: [Flexradio] A question about PA calibration I have witnessed this myself, and yet could not reproduce it or tie it to any other single application. If you find out what did it, please let us know. Another key setting to check is the DMA Buffer Size on that same tab. This was set to 2048 at the same time the output got changed in my experience. Eric Wachsmann FlexRadio Systems -Original Message- From: Tim Ellison [mailto:[EMAIL PROTECTED] Sent: Tuesday, December 06, 2005 3:57 PM To: [EMAIL PROTECTED]; FlexRadio@flex-radio.biz Subject: RE: [Flexradio] A question about PA calibration And I again lay prostrate to the Master. :-) This explains several things I have observed recently. I had originally used the quick start guide for the initial setup. I had not changed anything in the D44 control panel, but lo and behold the settings had changed. I'm not sure what application I ran that did it, but I now know what to look for. Thanks Eric. -Tim --- Tim Ellison ( [EMAIL PROTECTED] ) Integrated Technical Services ( http://www.itsco.com ) -Original Message- From: Eric Wachsmann - FlexRadio [mailto:[EMAIL PROTECTED] Sent: Tuesday, December 06, 2005 4:12 PM To: Tim Ellison; FlexRadio@flex-radio.biz Subject: RE: [Flexradio] A question about PA calibration Yes. The larger values indicate that something is seriously wrong. It sounds like the soundcard is setup for +4 dBU output (instead of -10dBv). Look at the Delta 44 Control Panel on the Hardware Settings Tab. This needs to look just like the pictures shown in the Delta 44 Quick Start guide seen here: www.flex-radio.com/delta44/delta44.htm. Eric -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] radio.biz] On Behalf Of Tim Ellison Sent: Tuesday, December 06, 2005 3:00 PM To: FlexRadio@flex-radio.biz Subject: [Flexradio] A question about PA calibration First off, I am not having any problems running the PA calibration routine. It works fine. The PA gain test results I received with the radio all fall in a range between 48.7 and 47.7 with a large majority being 48.0 dB When I run the PA calibration into my dummy load, I get much different numbers The range is between 65.8 and 55.0 with a large majority being 64.0 dB
[Flexradio] A question about PA calibration
First off, I am not having any problems running the PA calibration routine. It works fine. The PA gain test results I received with the radio all fall in a range between 48.7 and 47.7 with a large majority being 48.0 dB When I run the PA calibration into my dummy load, I get much different numbers The range is between 65.8 and 55.0 with a large majority being 64.0 dB Should I be concerned about this relatively large discrepancy between Flex-Radio determined gain test results and my own? I just want to make sure I am not damaging the PA. -Tim --- Tim Ellison mailto:[EMAIL PROTECTED] Integrated Technical Services http://www.itsco.com/ Apex, NC USA 919.674.0044 Ext. 25 / 919.674.0045 (FAX) 919.215.6375 - cell PGP public key available at all public KeyServers
Re: [Flexradio] A question about PA calibration
Yes. The larger values indicate that something is seriously wrong. It sounds like the soundcard is setup for +4 dBU output (instead of -10dBv). Look at the Delta 44 Control Panel on the Hardware Settings Tab. This needs to look just like the pictures shown in the Delta 44 Quick Start guide seen here: www.flex-radio.com/delta44/delta44.htm. Eric -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] radio.biz] On Behalf Of Tim Ellison Sent: Tuesday, December 06, 2005 3:00 PM To: FlexRadio@flex-radio.biz Subject: [Flexradio] A question about PA calibration First off, I am not having any problems running the PA calibration routine. It works fine. The PA gain test results I received with the radio all fall in a range between 48.7 and 47.7 with a large majority being 48.0 dB When I run the PA calibration into my dummy load, I get much different numbers The range is between 65.8 and 55.0 with a large majority being 64.0 dB Should I be concerned about this relatively large discrepancy between Flex-Radio determined gain test results and my own? I just want to make sure I am not damaging the PA. -Tim --- Tim Ellison mailto:[EMAIL PROTECTED] Integrated Technical Services http://www.itsco.com/ Apex, NC USA 919.674.0044 Ext. 25 / 919.674.0045 (FAX) 919.215.6375 - cell PGP public key available at all public KeyServers ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz
Re: [Flexradio] A question about PA calibration
And I again lay prostrate to the Master. :-) This explains several things I have observed recently. I had originally used the quick start guide for the initial setup. I had not changed anything in the D44 control panel, but lo and behold the settings had changed. I'm not sure what application I ran that did it, but I now know what to look for. Thanks Eric. -Tim --- Tim Ellison ( [EMAIL PROTECTED] ) Integrated Technical Services ( http://www.itsco.com ) -Original Message- From: Eric Wachsmann - FlexRadio [mailto:[EMAIL PROTECTED] Sent: Tuesday, December 06, 2005 4:12 PM To: Tim Ellison; FlexRadio@flex-radio.biz Subject: RE: [Flexradio] A question about PA calibration Yes. The larger values indicate that something is seriously wrong. It sounds like the soundcard is setup for +4 dBU output (instead of -10dBv). Look at the Delta 44 Control Panel on the Hardware Settings Tab. This needs to look just like the pictures shown in the Delta 44 Quick Start guide seen here: www.flex-radio.com/delta44/delta44.htm. Eric -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] radio.biz] On Behalf Of Tim Ellison Sent: Tuesday, December 06, 2005 3:00 PM To: FlexRadio@flex-radio.biz Subject: [Flexradio] A question about PA calibration First off, I am not having any problems running the PA calibration routine. It works fine. The PA gain test results I received with the radio all fall in a range between 48.7 and 47.7 with a large majority being 48.0 dB When I run the PA calibration into my dummy load, I get much different numbers The range is between 65.8 and 55.0 with a large majority being 64.0 dB Should I be concerned about this relatively large discrepancy between Flex-Radio determined gain test results and my own? I just want to make sure I am not damaging the PA. -Tim --- Tim Ellison mailto:[EMAIL PROTECTED] Integrated Technical Services http://www.itsco.com/ Apex, NC USA 919.674.0044 Ext. 25 / 919.674.0045 (FAX) 919.215.6375 - cell PGP public key available at all public KeyServers ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz
Re: [Flexradio] A question about PA calibration
I have witnessed this myself, and yet could not reproduce it or tie it to any other single application. If you find out what did it, please let us know. Another key setting to check is the DMA Buffer Size on that same tab. This was set to 2048 at the same time the output got changed in my experience. Eric Wachsmann FlexRadio Systems -Original Message- From: Tim Ellison [mailto:[EMAIL PROTECTED] Sent: Tuesday, December 06, 2005 3:57 PM To: [EMAIL PROTECTED]; FlexRadio@flex-radio.biz Subject: RE: [Flexradio] A question about PA calibration And I again lay prostrate to the Master. :-) This explains several things I have observed recently. I had originally used the quick start guide for the initial setup. I had not changed anything in the D44 control panel, but lo and behold the settings had changed. I'm not sure what application I ran that did it, but I now know what to look for. Thanks Eric. -Tim --- Tim Ellison ( [EMAIL PROTECTED] ) Integrated Technical Services ( http://www.itsco.com ) -Original Message- From: Eric Wachsmann - FlexRadio [mailto:[EMAIL PROTECTED] Sent: Tuesday, December 06, 2005 4:12 PM To: Tim Ellison; FlexRadio@flex-radio.biz Subject: RE: [Flexradio] A question about PA calibration Yes. The larger values indicate that something is seriously wrong. It sounds like the soundcard is setup for +4 dBU output (instead of -10dBv). Look at the Delta 44 Control Panel on the Hardware Settings Tab. This needs to look just like the pictures shown in the Delta 44 Quick Start guide seen here: www.flex-radio.com/delta44/delta44.htm. Eric -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] radio.biz] On Behalf Of Tim Ellison Sent: Tuesday, December 06, 2005 3:00 PM To: FlexRadio@flex-radio.biz Subject: [Flexradio] A question about PA calibration First off, I am not having any problems running the PA calibration routine. It works fine. The PA gain test results I received with the radio all fall in a range between 48.7 and 47.7 with a large majority being 48.0 dB When I run the PA calibration into my dummy load, I get much different numbers The range is between 65.8 and 55.0 with a large majority being 64.0 dB Should I be concerned about this relatively large discrepancy between Flex-Radio determined gain test results and my own? I just want to make sure I am not damaging the PA. -Tim --- Tim Ellison mailto:[EMAIL PROTECTED] Integrated Technical Services http://www.itsco.com/ Apex, NC USA 919.674.0044 Ext. 25 / 919.674.0045 (FAX) 919.215.6375 - cell PGP public key available at all public KeyServers ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz
Re: [Flexradio] A question about PA calibration
Just in case things should ever get screwed up in the computer here - what should be the default/recommended settings of the various buffers? Thanks! - Jeff, WA6AHL -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Eric Wachsmann - FlexRadio Sent: Tuesday, December 06, 2005 2:14 PM To: 'Tim Ellison'; FlexRadio@flex-radio.biz Subject: Re: [Flexradio] A question about PA calibration I have witnessed this myself, and yet could not reproduce it or tie it to any other single application. If you find out what did it, please let us know. Another key setting to check is the DMA Buffer Size on that same tab. This was set to 2048 at the same time the output got changed in my experience. Eric Wachsmann FlexRadio Systems -Original Message- From: Tim Ellison [mailto:[EMAIL PROTECTED] Sent: Tuesday, December 06, 2005 3:57 PM To: [EMAIL PROTECTED]; FlexRadio@flex-radio.biz Subject: RE: [Flexradio] A question about PA calibration And I again lay prostrate to the Master. :-) This explains several things I have observed recently. I had originally used the quick start guide for the initial setup. I had not changed anything in the D44 control panel, but lo and behold the settings had changed. I'm not sure what application I ran that did it, but I now know what to look for. Thanks Eric. -Tim --- Tim Ellison ( [EMAIL PROTECTED] ) Integrated Technical Services ( http://www.itsco.com ) -Original Message- From: Eric Wachsmann - FlexRadio [mailto:[EMAIL PROTECTED] Sent: Tuesday, December 06, 2005 4:12 PM To: Tim Ellison; FlexRadio@flex-radio.biz Subject: RE: [Flexradio] A question about PA calibration Yes. The larger values indicate that something is seriously wrong. It sounds like the soundcard is setup for +4 dBU output (instead of -10dBv). Look at the Delta 44 Control Panel on the Hardware Settings Tab. This needs to look just like the pictures shown in the Delta 44 Quick Start guide seen here: www.flex-radio.com/delta44/delta44.htm. Eric -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] radio.biz] On Behalf Of Tim Ellison Sent: Tuesday, December 06, 2005 3:00 PM To: FlexRadio@flex-radio.biz Subject: [Flexradio] A question about PA calibration First off, I am not having any problems running the PA calibration routine. It works fine. The PA gain test results I received with the radio all fall in a range between 48.7 and 47.7 with a large majority being 48.0 dB When I run the PA calibration into my dummy load, I get much different numbers The range is between 65.8 and 55.0 with a large majority being 64.0 dB Should I be concerned about this relatively large discrepancy between Flex-Radio determined gain test results and my own? I just want to make sure I am not damaging the PA. -Tim --- Tim Ellison mailto:[EMAIL PROTECTED] Integrated Technical Services http://www.itsco.com/ Apex, NC USA 919.674.0044 Ext. 25 / 919.674.0045 (FAX) 919.215.6375 - cell PGP public key available at all public KeyServers ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz
Re: [Flexradio] A question about PA calibration
It depends on the system, but a good set of general defaults are: Audio: 2048 DSP: 1024 Delta 44 DMA: 512 These can be adjusted downward depending on system speed and latency/filter requirements. Eric Wachsmann FlexRadio Systems -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] radio.biz] On Behalf Of Jeff Anderson Sent: Tuesday, December 06, 2005 4:29 PM To: FlexRadio@flex-radio.biz Subject: Re: [Flexradio] A question about PA calibration Just in case things should ever get screwed up in the computer here - what should be the default/recommended settings of the various buffers? Thanks! - Jeff, WA6AHL -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Eric Wachsmann - FlexRadio Sent: Tuesday, December 06, 2005 2:14 PM To: 'Tim Ellison'; FlexRadio@flex-radio.biz Subject: Re: [Flexradio] A question about PA calibration I have witnessed this myself, and yet could not reproduce it or tie it to any other single application. If you find out what did it, please let us know. Another key setting to check is the DMA Buffer Size on that same tab. This was set to 2048 at the same time the output got changed in my experience. Eric Wachsmann FlexRadio Systems -Original Message- From: Tim Ellison [mailto:[EMAIL PROTECTED] Sent: Tuesday, December 06, 2005 3:57 PM To: [EMAIL PROTECTED]; FlexRadio@flex-radio.biz Subject: RE: [Flexradio] A question about PA calibration And I again lay prostrate to the Master. :-) This explains several things I have observed recently. I had originally used the quick start guide for the initial setup. I had not changed anything in the D44 control panel, but lo and behold the settings had changed. I'm not sure what application I ran that did it, but I now know what to look for. Thanks Eric. -Tim --- Tim Ellison ( [EMAIL PROTECTED] ) Integrated Technical Services ( http://www.itsco.com ) -Original Message- From: Eric Wachsmann - FlexRadio [mailto:[EMAIL PROTECTED] Sent: Tuesday, December 06, 2005 4:12 PM To: Tim Ellison; FlexRadio@flex-radio.biz Subject: RE: [Flexradio] A question about PA calibration Yes. The larger values indicate that something is seriously wrong. It sounds like the soundcard is setup for +4 dBU output (instead of -10dBv). Look at the Delta 44 Control Panel on the Hardware Settings Tab. This needs to look just like the pictures shown in the Delta 44 Quick Start guide seen here: www.flex-radio.com/delta44/delta44.htm. Eric -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] radio.biz] On Behalf Of Tim Ellison Sent: Tuesday, December 06, 2005 3:00 PM To: FlexRadio@flex-radio.biz Subject: [Flexradio] A question about PA calibration First off, I am not having any problems running the PA calibration routine. It works fine. The PA gain test results I received with the radio all fall in a range between 48.7 and 47.7 with a large majority being 48.0 dB When I run the PA calibration into my dummy load, I get much different numbers The range is between 65.8 and 55.0 with a large majority being 64.0 dB Should I be concerned about this relatively large discrepancy between Flex-Radio determined gain test results and my own? I just want to make sure I am not damaging the PA. -Tim --- Tim Ellison mailto:[EMAIL PROTECTED] Integrated Technical Services http://www.itsco.com/ Apex, NC USA 919.674.0044 Ext. 25 / 919.674.0045 (FAX) 919.215.6375 - cell PGP public key available at all public KeyServers ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz
Re: [Flexradio] A question about PA calibration
This is not true for all modes and systems. For CW, it seems 512 across the board works best for me. That is why I recommended savable user profiles. This was just before the TX profiles became available on the transmit tab. But an even better solution would be to have selectable buttons along the top menu bar. These can be named according to user preference and should save ALL parameters of the radio, not just tx. So if I want to work CW, I can click on the CW profile and make whatever changes I want and apply them. There could also be an option button to apply them based upon mode button selection. Just a thought, but seems to make sense to me. Greg AB7R -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Eric Wachsmann - FlexRadio Sent: Tuesday, December 06, 2005 2:35 PM To: 'Jeff Anderson'; FlexRadio@flex-radio.biz Subject: Re: [Flexradio] A question about PA calibration It depends on the system, but a good set of general defaults are: Audio: 2048 DSP: 1024 Delta 44 DMA: 512 These can be adjusted downward depending on system speed and latency/filter requirements. Eric Wachsmann FlexRadio Systems -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] radio.biz] On Behalf Of Jeff Anderson Sent: Tuesday, December 06, 2005 4:29 PM To: FlexRadio@flex-radio.biz Subject: Re: [Flexradio] A question about PA calibration Just in case things should ever get screwed up in the computer here - what should be the default/recommended settings of the various buffers? Thanks! - Jeff, WA6AHL -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Eric Wachsmann - FlexRadio Sent: Tuesday, December 06, 2005 2:14 PM To: 'Tim Ellison'; FlexRadio@flex-radio.biz Subject: Re: [Flexradio] A question about PA calibration I have witnessed this myself, and yet could not reproduce it or tie it to any other single application. If you find out what did it, please let us know. Another key setting to check is the DMA Buffer Size on that same tab. This was set to 2048 at the same time the output got changed in my experience. Eric Wachsmann FlexRadio Systems -Original Message- From: Tim Ellison [mailto:[EMAIL PROTECTED] Sent: Tuesday, December 06, 2005 3:57 PM To: [EMAIL PROTECTED]; FlexRadio@flex-radio.biz Subject: RE: [Flexradio] A question about PA calibration And I again lay prostrate to the Master. :-) This explains several things I have observed recently. I had originally used the quick start guide for the initial setup. I had not changed anything in the D44 control panel, but lo and behold the settings had changed. I'm not sure what application I ran that did it, but I now know what to look for. Thanks Eric. -Tim --- Tim Ellison ( [EMAIL PROTECTED] ) Integrated Technical Services ( http://www.itsco.com ) -Original Message- From: Eric Wachsmann - FlexRadio [mailto:[EMAIL PROTECTED] Sent: Tuesday, December 06, 2005 4:12 PM To: Tim Ellison; FlexRadio@flex-radio.biz Subject: RE: [Flexradio] A question about PA calibration Yes. The larger values indicate that something is seriously wrong. It sounds like the soundcard is setup for +4 dBU output (instead of -10dBv). Look at the Delta 44 Control Panel on the Hardware Settings Tab. This needs to look just like the pictures shown in the Delta 44 Quick Start guide seen here: www.flex-radio.com/delta44/delta44.htm. Eric -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] radio.biz] On Behalf Of Tim Ellison Sent: Tuesday, December 06, 2005 3:00 PM To: FlexRadio@flex-radio.biz Subject: [Flexradio] A question about PA calibration First off, I am not having any problems running the PA calibration routine. It works fine. The PA gain test results I received with the radio all fall in a range between 48.7 and 47.7 with a large majority being 48.0 dB When I run the PA calibration into my dummy load, I get much different numbers The range is between 65.8 and 55.0 with a large majority being 64.0 dB Should I be concerned about this relatively large discrepancy between Flex-Radio determined gain test results and my own? I just want to make sure I am not damaging the PA. -Tim --- Tim Ellison mailto:[EMAIL PROTECTED] Integrated Technical Services http://www.itsco.com/ Apex, NC USA 919.674.0044 Ext. 25 / 919.674.0045 (FAX) 919.215.6375 - cell PGP public key available at all public KeyServers ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz
Re: [Flexradio] A question about PA calibration
ab7r wrote: This is not true for all modes and systems. For CW, it seems 512 across the board works best for me. That is why I recommended savable user profiles. This was just before the TX profiles became available on the transmit tab. But an even better solution would be to have selectable buttons along the top menu bar. These can be named according to user preference and should save ALL parameters of the radio, not just tx. So if I want to work CW, I can click on the CW profile and make whatever changes I want and apply them. There could also be an option button to apply them based upon mode button selection. Just a thought, but seems to make sense to me. Greg AB7R I've thought of this one, too. I think it is a great idea. That way, not only can you have your own thing you could have multiple personalities that you could load for your different operating modes. I'd have one profile for CW DXing with the amplifer, without the amplifier, and for RTTY. Larry WO0Z
