[Flexradio] TX Power
Guys, I got my 3000 at Dayton this year and am just now starting to really dig into it. First thing I noticed is that the drive seems low. I connected the 3000 to my AL-811h amp, and right away I notice much lower output from the amp Vs using it with my 756 Pro II. That was right after Dayton. Today I had some time and connected the 3000 to a good pep watt meter and dummy load. Checked all bands for output using SSB, AM and FM. The am fm readings were all about the same on all bands. 35 to 40 watts depending on band and mode. But on SSB I'm getting 45 to 70 watts pep depending on the band. This seems low to me. I looked under setup and click the PA settings tab, it is blank? manual shows I should be able to make adjustments. Any Ideas? Thanks for your time and input. 73 Dave W9WRL.com ___ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flexradio.com/ Homepage: http://www.flexradio.com/
Re: [Flexradio] TX Power Meter
Thanks for the explanation Tim, Greatly Appreciated -Original Message- From: Tim Ellison [mailto:telli...@itsco.com] Sent: Tuesday, December 29, 2009 9:30 AM To: Anthony M; flexradio@flex-radio.biz Subject: RE: [Flexradio] TX Power Meter That was a good question. I had to query "King Daddy" himself. Here is the explanation regarding the TX Power output I received. The RC bridge used in FLEX-x000 SDRs was designed to *try* and catch RF power output peaks on SSB. The software is sampling power every 100 ms, so there is a distinct possibility that it will not catch every peak. Looking at the code (and I am not a programmer, just someone who knows a little about it), I do not see where any averaging logic is taking place, so it appears that the TX meter is an instantaneous "hope we caught the TX power peak" meter. For all practical purposes you can assume it is PEP. Most PEP watt meters have very short sampling times if they are digital, so in essence at a microscopic level, they are averaging peak readings and just have a peak hold feature to show the largest reading over a defined time period. -Tim -Original Message- From: flexradio-boun...@flex-radio.biz [mailto:flexradio-boun...@flex-radio.biz] On Behalf Of Anthony M Sent: Monday, December 28, 2009 3:23 PM To: flexradio@flex-radio.biz Subject: [Flexradio] TX Power Meter Hi Guys, Just wanted to find out clarification on the TX power meter in PowerSDR. Is it PEP, Average, or? For example running 100watts (100 drive & displaying 100w on tx in powersdr) does this = 100W out? Cheers ___ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flex-radio.com/ Homepage: http://www.flex-radio.com/ Message delivered to telli...@itsco.com ___ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flex-radio.com/ Homepage: http://www.flex-radio.com/ Message delivered to arch...@mail-archive.com
Re: [Flexradio] TX Power Meter
That was a good question. I had to query "King Daddy" himself. Here is the explanation regarding the TX Power output I received. The RC bridge used in FLEX-x000 SDRs was designed to *try* and catch RF power output peaks on SSB. The software is sampling power every 100 ms, so there is a distinct possibility that it will not catch every peak. Looking at the code (and I am not a programmer, just someone who knows a little about it), I do not see where any averaging logic is taking place, so it appears that the TX meter is an instantaneous "hope we caught the TX power peak" meter. For all practical purposes you can assume it is PEP. Most PEP watt meters have very short sampling times if they are digital, so in essence at a microscopic level, they are averaging peak readings and just have a peak hold feature to show the largest reading over a defined time period. -Tim -Original Message- From: flexradio-boun...@flex-radio.biz [mailto:flexradio-boun...@flex-radio.biz] On Behalf Of Anthony M Sent: Monday, December 28, 2009 3:23 PM To: flexradio@flex-radio.biz Subject: [Flexradio] TX Power Meter Hi Guys, Just wanted to find out clarification on the TX power meter in PowerSDR. Is it PEP, Average, or? For example running 100watts (100 drive & displaying 100w on tx in powersdr) does this = 100W out? Cheers ___ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flex-radio.com/ Homepage: http://www.flex-radio.com/ Message delivered to telli...@itsco.com ___ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flex-radio.com/ Homepage: http://www.flex-radio.com/ Message delivered to arch...@mail-archive.com
[Flexradio] TX Power Meter
Hi Guys, Just wanted to find out clarification on the TX power meter in PowerSDR. Is it PEP, Average, or? For example running 100watts (100 drive & displaying 100w on tx in powersdr) does this = 100W out? Cheers ___ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flex-radio.com/ Homepage: http://www.flex-radio.com/ Message delivered to arch...@mail-archive.com
