Power-SDR Flex1500 WSJT-X - v2.8.0.57 2x

Now since using VbCable for the virtual audio connections
P-SDR + WSJT v1.8 is working stable on the older X60 PC
reducing CPU load using the information excellent ke9ns.com/flexpage.html  
Keeping the P-SDR screen as small as possible reduced the CPU load to acceptable 60%

P-SDR  and running 2 instances of WSJT-X  need a faster PC
A "slow" PC  drops decodes when  Power SDR is running together with
a second instance of WSJT-X
CPU load is 80-100%  on Lenovo X60  2400T  1.83GHz
On a faster Thinkpad W510 W7 i7 1.83G 4 /8 core CPU load 20%
Using  VBCable VB-Audio VAC  and VspMgr
Installing was quick but P-SDR -FLex1500 would not receive, the PAN window was empty.
The Flex1500 was connected over USB-3  - CAT  worked okay.
Switching to USB-2  finally P-SDR started to work  and WSJT-X was decoding FT8 and WSPR

But the  PowerSDR screen is cut off  and  fields and controls are overlapping.
The  screen resolution dot/inch  setting 125% is fine for the PAN screen and my programs.
If I change that to 100% possible P-SDR is fine but the other screens will have shrink too much
Another issue is at   136kHz  empty PAN screen but it does decode  WSPR  2E0ILY  and PA0A
Another strange issue  P-SDR the audio level at WSJT-X drops to zero on 160m
also the headphone audio out is quiet at 160m
Now also the audio is gone on 136kHz both physically and virtual.
Or the level is very much lower then on other bands. It can be set higher but then the other bands audio levels are in the red zone.
Level settings are general for all bands

P-SDR seems to receive normal according to the pan window
 I did not have that at the other slow X60
Stange things happen
136kHz  empty pan screen


Decoding is okay  the strongest signals +30dB do not have the usual 50Hz IMD lines
thats looks fine until now strong signals always showed multiple traces and decodes  at +/- 50Hz IMD traces accompanying the main trace



                                           other bands fill the screen but all is drawn a bit wrong.





28MHz ! earlier today



few days earlier :
Power SDR V2.8.0.57   now runs 1  day without problem
But not much longer then i have  the issue that WSJT no longer decodes
P-SDR receiving looks  normal on the waterfall and audio over VAC is present at WSJT
but simply it stops to decode, then only rebooting the PC will help.
Also  found the PC next morning  in the reboot state when returning to the radio after some longer time.
So some nights spot reporting ended preliminary.

One other observation  i have with U3S  originated WSPR signals
is that a there is sometimes a rubbish ghost decode   like 000AAA/1  below
 i notice that on a local U3S  WSPR beacon regulary
One of the U3S I have build is in use  PD0OHW/M   and PA0O/A
and sometimes decodes like below happen synchronous with the correct decoded spot



0020 -1 2.3 0.475715 0 PA0SLT JO33 47 39
0022 -10 4.3 0.475630 0 F4DTL JN18 20 585
0022 -22 3.4 0.475681 0 AA1A FN42 37 5628
0022 -4 2.8 0.475720 0 LA8AV JO59 23 747
0022 -24 2.9 0.475790 0 EB8ARZ/1 23
0022 -31 2.9 0.475793 0 000AAA/1 23
0024 -20 2.0 0.475681 0 AA1A FN42 37 5628
0024 -7 3.0 0.475729 0 F1AFJ JN06 30 851

0730 -19 0.1 28.125998 0 DL0PBS JO33 17 39
0730 -7 0.2 28.126155 0 PD0OHW/M 20
0730 -10 0.1 28.126158 1 000AAA/M 20
0732 -15 1.5 28.126074 -4 DJ9AE JO42 33 183
0732 -9 0.2 28.126155 0 JO33HE 20 9



136kHz  reception at daytime  +70 dB here
 http://www.qru.de/dcf39-beacon.html
DCF39 on (nominal) 139.000 kHz, QTH near Magdeburg/Germany


0016 --------------------- Receiving WSPR ----------------------- 2190m
0018 --------------------- Receiving WSPR ----------------------- 2190m
0020 -1 2.3 0.475715 0 PA0SLT JO33 47 39
0022 -10 4.3 0.475630 0 F4DTL JN18 20 585
0022 -22 3.4 0.475681 0 AA1A FN42 37 5628
0022 -4 2.8 0.475720 0 LA8AV JO59 23 747
0022 -24 2.9 0.475790 0 EB8ARZ/1 23
0022 -31 2.9 0.475793 0 000AAA/1 23
0024 -20 2.0 0.475681 0 AA1A FN42 37 5628
0024 -7 3.0 0.475729 0 F1AFJ JN06 30 851
0026 --------------------- Receiving WSPR ----------------------- 2190m
0028 --------------------- Receiving WSPR ----------------------- 2190m
0034 --------------------- Receiving WSPR ----------------------- 2190m
0036 ---------------------- Receiving WSPR ----------------------- 630m
0038 --------------------- Receiving WSPR ----------------------- 2190m
0040 --------------------- Receiving WSPR ----------------------- 2190m
0042 --------------------- Receiving WSPR ----------------------- 2190m
0044 --------------------- Receiving WSPR ----------------------- 2190m
0046 ---------------------- Receiving WSPR ----------------------- 630m

0048 ---------------------- Receiving WSPR ----------------------- 630m

sudden no more decoding  traces are normal present in pan window



Comments