I have the same issue here with v3.4.9. I bought the second hand ANAN-100D specifically for the 6m Es season. This thread does not indicate that there is an actual fix. Last night I could not use the radio in a contest because of the problem. I am amazed that this only happens with some radios and I...

Sorry when I was speed reading in a coffee break I did not notice that it was hyperlink. Will do so and also report back Wednesday evening all being well.

73

Conrad PA5Y

Hello Scott, I will have limited time tonight and also the moon rise is getting very late and lunar conditions are worsening. What I can maybe do is come up with a test signal and a variable delay line in 1 leg. I would like to do this so that I can get meaningful and repeatable measurements. Just t...

Not without doing some reading. I don't have any spare time today

Hi Bryan its an ANAN-100D so yes that is also my suspicion. What we need is a way of compensating and the easiest way is with a piece of cable. The size of the error must be caused by a filter and not just PCB track lengths. This is an error at 28MHz so 40 deg is significant length of cable. Maybe t...

Hello Scott now I have this setup. Which I believe is more in line with your expectations, I now use different ASIO feeds from PowerSDR to MAP65. Perhaps best explained with screen grabs. There is only a single B1 selected. Notice that the sample rate and buffers indicators above the virtual inputs ...

There is a phase error of around -40 deg, compared it for several hours with my normal system and that is what I observed. I do not know the root cause of this. Perhaps the length of the RX path or perhaps filters in one path and not the other, I am tired now but will continue to experiment

Conrad

Forgot to mention - very important, in the phasing control receiver source RX1 must be selected and RX1 should be the H channel. This is 0 deg and needs to be set like this to get the correct phase relationship. If you set RX1 and RX2 as the source then you always get 45 deg

Now for some 2M EME - I think it is working fine, I have some gain imbalance on CH1 and CH2 but it could be real, at low elevations often V signal on CH2 has a higher noise floor so before I address this I thought that I would share some things. Firstly look at the screenshot of LiveCQ which shows w...

The moon has just risen here so I will attempt to connect up the coherent dual channel 144>28MHz transverters - then we will really see. Bryan I think that I will have enough gain. Also the frequency is fixed, there is never any need to change it. It will be 144.125 on 2m EME, always. For TX I do no...

Scott thanks, see comments below. Congratulations on the forward progress. The screen shots are great. It would be very handy to see a shot of the VAC1 setup window. Some observations and concerns that might help fix your ghost problems: 1. You should not have any A1 sends checked in VMB. This would...

It WORKS!! https://www.dropbox.com/s/pub2xkhv2ml3gs2/MAP65_weak.JPG?dl=1 As expected this produces either 135 or 45 deg reported polarity as both inputs are in phase with equal amplitudes However we are not out of the woods yet, There are a few issues, more later. Also it is reliable with respect t...

Update. I am not sure why I could not see the 4 channels in VMB previously but now I can, I am also able to confirm that the 4 channels are successfully passed to the UMC404HD ASIO output albeit at a very low amplitude. Next step is to see if I can get the signals into Linrad somehow. Regards Conrad

Good morning. I tried with M-VAC and I could see some activity on the control panel metering. I could not get MAP65 to open any of the PORT AUDIO devices that were needed. I suspect that 4 channels is the problem. It must be 96000 SR so and although the control panel was reporting 96000/16 the M-WAC...

I set up ASIO because it was mentioned explicitly by Bryan in his initial email on the subject, Have no idea whether this works with any sound API other than ASIO'. So I thought that I would try that first, I will try Muzychenko VAC some time this evening. What I don't understand is why the VU meter...

Well I finally found some time to test Bryan W4WMT's patched PowerSDR v3.4.9. It is patched to provide 2 x I/Q pairs via VAC1 when Direct I/Q output to VAC is selected. This uses VAC1. Enabling diversity forces the RX1 and RX2 to be coherent. Unfortunately I have been unable to set up VMB to accept ...

Good advice and as another bonus you will find that radiation from your PC will diminish. You will notice this most on 10m and 6m but it is significant.

73

Conrad PA5Y

Walter what time constant for the metering is appropriate for this measurement?

73

Conrad PA5Y

Walter thanks so much for the testing I am really grateful. I see the harmonics in RX2 with static tones on MSHV, I have posted to the MSHV email reflector about it. Thanks for the tip about the peak and average metering. I never thought of that! I won't get chance to do any more testing until late ...

Thanks very much Walter. I don't have an AM demodulation option fitted to my Agilent E4406A however it does have Vector Signal analysis tools in the time domain so I should be able to do something similar. I hardly ever use the time domain tools and need to spend a little time experimenting. I also ...

I still need to experiment a little but using markers and a combination of RMS and peak hold values I have determined the following. Peak to RMS with 200-3100Hz filter is 3.4dB for MSK144 Peak to RMS for FT8 is 0dB Peak to RMS for JT65A and B 0dB Same conditions as the previous post. MSK144 still lo...

Thanks Walter, that is the next stage for me to roll out the analyser. As promised I have tested WSJT-X static tones and amplitudes, everything behaves as expected and output is stable with static tones but I do see variations in amplitude on the Fwd Pwr meter when using JT65A,B & C which I do n...

Hello Stu, sorry no. I am moving house and have been on 2m EME then a 4m contest. Its a holiday here tomorrow so I will get chance for sure. Please accept apologies for my tardiness. I did manage to work ZS6NK on 6m EME today using JT65A so nothing much wrong I think. I have a single yagi. As Scott ...

I am stumped as well. I cannot reproduce this behavior on an 8000 under any reasonable conditions. Well I have a 100D and as you know I am unreasonable. Especially when I am talked to in a condescending manner. No one likes a smart Alec Scott you are making me & others scared of posting. I am r...

Hello Stu I will check this tonight, I will do it with both VMB and via the line input. I have toggled the TX EQ many times.

Scott was that a thinly veiled rebuke? I am a very busy man and do not have your fervour for all things on this forum, To me it is a tool not a way of life. Please refrain from such behaviour in the future. I am sorry that I missed it but there is so much Scott omnipresence it has started to turn me...

Rob please post a link to the bypass solution. I am a VHF and up operator so I have a plethora of nice relays I can use. Collecting them is something of a a fetish. I also have some very well screened coax.

Regards

Conrad

I have done this until I am blue in the face Stu. I follow your logic but unfortunately it does not provide a solution. I will leave it a day or two I think. I have checked the frequency response of the audio from both a UMC404HD, and an UMC202HD as well as using audio tools on the VAC output so tha...

Hello Scott.

Sorry for the late reply I have been away.

I see quite large deviations in excess of 2dB.

I see this issue both with and without pure signal active. I set up PS with 2 tone testing prior to using it with data modes.

Regards

Conrad

I am really only interested in 6m. I have an ANAN-100D. The internal cross-talk is so high that I can only use output powers of under 32W. Also when I engage DUP to look at my TX signal it is of limited use because of front end saturation, I can only monitor at So this means 2 things I presume: I ha...