Re: [Flexradio] Big Power Spike with Preview 7
If you are using digital mode (DIGU, DIGL), all control for the dsp level control stuff is bypassed. The power button on the front panel should still work but there is no absolutely no scaling whatsoever done inside the dsp. It is up to you the user to get your settings correct from the digital programs. If you are use VAC, you should set the TX and RX scalings in the DSP/Audio/VAC control panel. The proper procedure should be to set VAC at a level that will accomodate all the programs and then where the programs will allow adjustment, touch those up to compensate for disparities in settings amongst programs. Until we allow a MixW profile, WSJT profile, MMSSTV profile, etc., this is the best we can do. Again, let me emphasize, in digital modes (DIGU and DIGL) all leveler, alc, mike/ssb controls are bypassed. It is now a completely linear chain on transmit. What goes in is what comes out. If you overdrive the input, you will overdrive the output. This is exactly what was written about in the release notes for preview release 6. Bob Larry Loen wrote: This has probably been reported and I missed it, but I had a very unpleasant, if brief experience last night. On preview 7, I set the PWR control to about 23, where I customarily had on 40 meters, and instead of putting out the 25 to 30 watts I normally get, it put out max power. As far as I know, the PA setting is fine and the same as on 1.4.1 where this all worked. I can drive my amplifier properly with a setting of 8 (the Harris has a two stage amp). Is there anything I've overlooked? I'm back to 1.4.1 on digital until I understand this, but I'm reluctant to do experiments that are driving output at 100 watts by the SDR's forward output. Larry WO0Z ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz
Re: [Flexradio] Big Power Spike with Preview 7
If you are using digital mode (DIGU, DIGL), all control for the dsp level control stuff is bypassed. The power button on the front panel should still work but there is no absolutely no scaling whatsoever done inside the dsp. It is up to you the user to get your settings correct from the digital programs. I am using neither DIGU nor Virtual Sound Card at the moment. I simply shut of the compactor/compandor settings and put the MIC control where it had been in 1.4.1. I'm not sure, at the moment, that I have it quite right even for 1.4.1 (I may be overdriving, even with MIC at 33), but I was making contacts and getting predictable power output, at least. It's nice to make me responsible and all, but I was not (and still am not) prepared for the radical change, here. I would have expected the old settings to be close -- this setup was what I had tried with 1.4.4 which, while not wholly successful, at least didn't put me at risk of blowing my finals. I suppose I'll have to bone up on using the DIG stuff and sneak up on the power levels, then. My biggest problem, really, is that knowing a priori how to set PWR and MIC have always been incomprehensible to me, especially at low power levels. I've run the PA calibrate several times now and whatever parameters I choose to run it, when the PWR value gets much below 40 or 50, the actual wattage out is not particularly predictable and not always linear. It is also not the same from band to band. Right now, on Preview 7, I set the PWR value for 8 on 40 meters and 13 on 80 meters. Why? Because that puts out the 4 watts I need to feed the attenuator (!) for the input on the Harris amp. It works. But, it beats me as to why the values are as they are. This has been so since I can remember. This bit of unpredictability is there at higher power too, but not as big an issue by any means, since it's a 20 per center on the high end, but binary multiples of power difference at the bottom. This may imaginably be somewhat specific to my rig by now. It has lead a particularly adventurous life. This is the very rig that W0VB used for his famous moonbounce contact and whatever VHF work he did besides, at least until I got it around this time last year, as well as the many hours of HF work I have done with and without an amp. It was also in-line for the entire Belize contest, where we were doing a lot of scrambling and probably not always ostentatiously following the manual. Wonderfully, it has survived everything I have tossed at it, mistakes and all. To be sure, the MIC/PWR thing has been a question for as long as I can remember, certainly as long as I ran digital (which, I think started circa March, so I may be overplaying this). None the less, in the interest of full disclosure, I probably should mention that. In terms of hours and versatility of use, there probably are few SDRs that have been in as many situations as this one or seen as big a variety of correct and incorrect operations. Larry WO0Z
[Flexradio] Xylo
I am goingto follow along with the FPGA project. I have ordered the board and now I need to get up to date with all the stuff I will need for this project. I guess I need to know what resources I need. Such as: What software isrequired (is there a preferred flavor?) What hardware would be useful besides the Xylo board which I have ordered and the Wolfson chips which I already have some samples of? Web sites (allI know of is the fpga4fun.com site) I understand Phil C. and Phil H. already have projects working. Is there any info available describing them? Anybody else going to dabble? 73, Steve - K5FR
[Flexradio] Loud audio pop during band changes with 1.4.5p7
I have noticed that there is a loud pop heard in the speakers every time I change bands or use the band stack registers to go to another portion of the same band. It only does it when the relays kick in. On 160, 80, 60, 30, 17,12 6 meters the initial band change results in a relay clack and a loud POP. Changing to different parts of the 160, 80, 60, 30, 17,12 6 meter band using the band stack registers does not produce a relay clack and there is no popping noise no mater how many time you change frequencies with the BSR. On 40, 15, 10 meters the initial band change results in a relay clack and a loud POP. Changing to different parts of the 40, 15, 10 meter band using the band stack registers does not produce a relay clack BUT there is a audible popping noise, but much quieter that the initial POP no mater how many time you change frequencies with the BSR. If I am changing between the three BSR settings on 20 meters, I observe that the first two band changes I hear the relays clack and hear the load pop. One the third band change, I do not hear a relay clack and the audible pop is much lower in intensity almost like a click rather than a pop. Then the pattern repeats itself if I continue to change band stack register - Pop, Pop Click. This problem is 100% reproducible. This is all observed with version 1.4.5 preview 7. Doing the same test listed above on version 1.4.4, I hear an relay clack when I initially change to a band, but NO popping. Change to different frequencies within the same band using the BSR produces NO popping. This behavior is the same on all bands. Even 20 meters, I do not hear the multiple relay clacks using version 1.4.4 like I do with 1.4.5p7 Configuration: AMD Athlon dual core 4400+ 1 GB RAM Delta 44 Standard SDR1000 configuration without tuner or transverter -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] BSD occurred while changing frequencies using BSR w/ 1.4.5p7
Error occurred with version: 1.4.5p7 During the testing of the popping noise during frequency changes using the band stack register (BSR) feature on 20 meter, I experienced a blue screen of death: IRQ_NOT_LESS_OR EQUAL Hex code: 0x000a (0x0028 0x0002 0x0001 0x80a5702a) I have the mini dump if anyone wants it. -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
