Search found 32 matches

by DL2XY
Fri Sep 27, 2019 4:30 pm
Forum: PowerSDR mRX
Topic: SWR Meter Option and Panadapter Display
Replies: 2
Views: 467

Re: SWR Meter Option and Panadapter Display

1.
SWR.jpg
SWR.jpg (37.85 KiB) Viewed 461 times


2.
center.jpg
center.jpg (36.33 KiB) Viewed 461 times



73 Walter
by DL2XY
Wed Sep 11, 2019 7:49 pm
Forum: PowerSDR mRX
Topic: Record playback feature
Replies: 12
Views: 2091

Re: Record playback feature

Mark one or more of the following Checkboxes for your prefered method of TX activation: Setup/Audio/VAC1/Checkbox "Allow PTT to override/bypass VAC for Phone" Setup/Audio/VAC1/Checkbox "Allow MOX to override/bypass VAC for Phone" Setup/Audio/VAC1/Checkbox "Allow SPACE to ove...
by DL2XY
Sat Jul 20, 2019 7:24 pm
Forum: PureSignal Operations
Topic: Anan 7000dle and pure signal setting
Replies: 12
Views: 2450

Re: Anan 7000dle and pure signal setting

The amplifier is clearly overdriven (clipping), look at Mag AMP (blue Line). It touches 1 on Y axis at X=0.9. In the higher part the blue line is widened, an indicator for a weak power supply. I think you cannot expect 600W output in "LOW" setting at only 32V drain voltage. This is how it ...
by DL2XY
Thu Jun 27, 2019 3:12 pm
Forum: Amplifiers & Tuners
Topic: Anan 200D and Acom 600 S
Replies: 10
Views: 4659

Re: Anan 200D and Acom 600 S

Not yet, i do not think it would be of public interest. It is just a simple workaround for a specific linear from a specific manufacturer who tend to exaggerate with self protection measures... ;) But if you like you may pass this to Doug. 73 Walter PowerSDR MRX PS V3.4.9 setup.c / chkTestIMD_Checke...
by DL2XY
Wed Jun 12, 2019 8:03 pm
Forum: Digital Mode, Rig Control & Logging Software
Topic: Best AGC for digital modes?
Replies: 30
Views: 2918

Re: Best AGC for digital modes?

AGC Gain as low as possible, as high as necesarry. Any time. Any Mode.

Just drag the green line on peak of the strongest Signal in passband.

Walter [DL2XY]
by DL2XY
Mon Apr 22, 2019 3:54 pm
Forum: Thetis
Topic: ANAN100 no TX-Output
Replies: 2
Views: 731

Re: ANAN100 no TX-Output

w9mdb wrote:Did you try a database reset?


Database is complete virgin. Only parameter changed was Radio Model.

73 Walter
by DL2XY
Mon Apr 22, 2019 3:05 pm
Forum: Thetis
Topic: ANAN100 no TX-Output
Replies: 2
Views: 731

ANAN100 no TX-Output

Software:
Thetis_V2.6.5.0_Setup.msi
Thetis_V2.6.6.0_Setup.msi

Firmware:
Hermes_Protocol_2_v10.7.rbf


Everything seems to work fine but no RF-Output at all.
Monitoring and ALC-Indiction are ok.

Any thougts ?

73 Walter
by DL2XY
Fri Oct 05, 2018 6:52 pm
Forum: Orion (200D)
Topic: TX DUP signal problem 200D?
Replies: 2
Views: 1548

Re: TX DUP signal problem 200D?

Hello Dave. These are 100Hz sidebands. Please check your power supply for defective filter capacitator or rectifier. Maybe you can try another supply. Another possibility is an antenna problem leading to high common mode currents which will flow through rectifier of the supply. That would modulate t...
by DL2XY
Tue Sep 18, 2018 3:31 pm
Forum: Amplifiers & Tuners
Topic: ANAN-10 PA IMD performance
Replies: 11
Views: 4934

Re: ANAN-10 PA IMD performance

I don´t know how you measured this - analyzer overdriven ?? at 33dBm on Marker 1 ? Don't worry about the +33dBm, there is a function (Reference Offset) to display the "real world power" on the chart. I have simply forgotten to do this. Analyzer should get max -30dBm at Input to show disto...
by DL2XY
Sun Sep 16, 2018 7:09 pm
Forum: Amplifiers & Tuners
Topic: ANAN-10 PA IMD performance
Replies: 11
Views: 4934

Re: ANAN-10 PA IMD performance

Hi Conrad, here are my ANAN100 IMD-tests on 10m band for comparsion. After purchase i had to readjust bias currents due to poor performance (4 years ago). Hermes output at 80% drive level, PA off, predistortion off 10m_Hermes_80%.jpg PA output at 80W, presdistortion off 10m_80W_PSoff.jpg PA output a...
by DL2XY
Sun Sep 16, 2018 11:38 am
Forum: PowerSDR mRX
Topic: Drive Lock Button
Replies: 4
Views: 1493

Re: Drive Lock Button

ok, it would be quite simple to add this functionality to source-code. In my personal build i implemented that in this way: In console.cs add a DoubleClick-Event for lblPWR. private void lblPWR_DoubleClick(object sender, EventArgs e) // DL2XY Drive PWR Lock { ptbPWR.Enabled = !ptbPWR.Enabled; // Tog...
by DL2XY
Wed Sep 12, 2018 11:03 pm
Forum: Hermes (10 & 100)
Topic: ANAN-10 TX spurs
Replies: 17
Views: 7339

Re: ANAN-10 TX spurs

f6dro wrote:The other question is : why is Conrad anan10 better than mine?


I found the Reason: He is using 384kSmp/s !

10m_SR384.jpg
10m_SR384.jpg (136.1 KiB) Viewed 7176 times


But +/- 2MHz are still there.

10m_SR384_5M.jpg
10m_SR384_5M.jpg (132.14 KiB) Viewed 7176 times


73 Walter
DL2XY
by DL2XY
Wed Sep 12, 2018 6:26 pm
Forum: Hermes (10 & 100)
Topic: ANAN-10 TX spurs
Replies: 17
Views: 7339

Re: ANAN-10 TX spurs

ooooops anan10 not anan 100 like mistyped No problem, they behave exactly the same. ... for the strongest one + and - 385 Khz from the carrier... Maybe you missed the +/- 2.112 MHz ones ? ANAN100 attached to 2m transverter: 144mhz 1min.jpg Ok, there are spurs, but they are below legal limit. What w...
by DL2XY
Wed Sep 12, 2018 5:22 pm
Forum: PowerSDR mRX
Topic: Drive Lock Button
Replies: 4
Views: 1493

Re: Drive Lock Button

More likely you will forget to check the slider after a band or mode change...

If you want to get sure just adjust the PA-Gain setting according to max. amplifier input.

Regards Walter,
DL2XY
by DL2XY
Sun Jul 22, 2018 11:06 am
Forum: PowerSDR mRX
Topic: Panadapter level reading when using "tune"
Replies: 3
Views: 1413

Re: Panadapter level reading when using "tune"

If it helps, the correct display is restored when changing ATT during TUNE.
This is not persistant, on the next tune the error comes up again.

Walter
by DL2XY
Sat Jul 14, 2018 7:30 pm
Forum: Digital Mode, Rig Control & Logging Software
Topic: RX1 AF level with WSJTX
Replies: 27
Views: 5577

Re: RX1 AF level with WSJTX

On pure white noise there is virtually no difference to detect. With slightly fluctuating band noise you can reproduce the effect by setting the AGC-Level within the fluctuation band. Everytime the level exceedes the threshold the gain is lowered to come up again with decay time constant. That is pe...
by DL2XY
Fri Jul 13, 2018 5:26 pm
Forum: PowerSDR mRX
Topic: S meter reading
Replies: 14
Views: 2379

Re: S meter reading

Into a dummy load, with no attenuation, and a 2.7KHz RX passband, the S-meter should be right around S2, S3 at most. Way too much. Just checked on 80m, no ATT, 50Ohm termination at 26°C . 2700 Hz BW: -125 dBm (S-Meter, Avg) 1Hz BW: -159 dBm (Spectrum Display, AVG, 1Hz normalization active) This is ...
by DL2XY
Sun Apr 15, 2018 8:15 am
Forum: Diversity Operations
Topic: Phase Relationship between VFO A and VFO B
Replies: 9
Views: 3698

Re: Phase Relationship between VFO A and VFO B

Hi Scott: So if this were true, I guess that to fix the problem you'd have to write the FPGA code so as to reset the phase start points to zero for both oscillators upon a change of frequency. Or something like that. It's just simpler:For "Diversity" use the signal of one NCO for both DDC...
by DL2XY
Tue Apr 03, 2018 9:36 am
Forum: Digital Mode, Rig Control & Logging Software
Topic: Amplitude modulation on 'constant envelope' modes
Replies: 19
Views: 4759

Re: Amplitude modulation on 'constant envelope' modes

Hello Conrad, there is virtually no difference in PAPR of MSK144 between WSJT-X and MSHV. But there are much differences in signal quality. Second harmonic of 1kHz Tone (Tune Mode) @ -1dBfs: WSJTX: -98 dBc MSHV: -45 dBc Frequency response (JT65 @ 1kHz AF) is worse too. WSJT-X: 0.06 dB peak MSHV: 0.2...
by DL2XY
Mon Apr 02, 2018 9:59 pm
Forum: Digital Mode, Rig Control & Logging Software
Topic: Amplitude modulation on 'constant envelope' modes
Replies: 19
Views: 4759

Re: Amplitude modulation on 'constant envelope' modes

Here are the results of the requested measurements. Analyser is Rohde&Schwarz FSAS in Receiver-Mode (AM-Demodulation). JT65 shows the usual phase jumps at frequency transitions but a straight line between them: JT65 AM.jpg MSK144 has AM components of about 16% as expected. Note the changed scali...
by DL2XY
Mon Apr 02, 2018 11:41 am
Forum: Digital Mode, Rig Control & Logging Software
Topic: Amplitude modulation on 'constant envelope' modes
Replies: 19
Views: 4759

Re: Amplitude modulation on 'constant envelope' modes

I have checked for this issue on Anan100 on 20m, FT8-Mode via VAC from WSJT-X.

Indeed there is a little residue AM of about 1% peak, but only during frequency changes of modulation.
IMHO this is just an effect of the phase jumps during frequency transitions.


restam.jpg
restam.jpg (68.81 KiB) Viewed 4565 times



73 Walter [DL2XY]
by DL2XY
Tue Feb 13, 2018 4:05 pm
Forum: PureSignal Operations
Topic: Panadapter "view" in TX with DUP on - using PS
Replies: 7
Views: 2818

Re: Panadapter "view" in TX with DUP on - using PS

Do you use an external sampler unit behind your Expert2K ?
Is it correctly attached and configured to be the PS sample input ?
Do you have MON and DUP enabled?

Walter
DL2XY
by DL2XY
Sat Dec 16, 2017 10:58 am
Forum: PowerSDR mRX
Topic: ADC1 Overload
Replies: 16
Views: 3890

Re: ADC1 Overload

Mike,

did you check the "ATT on TX" setting?

73 Walter
by DL2XY
Mon Dec 11, 2017 10:22 am
Forum: PowerSDR mRX
Topic: Quick record on AM
Replies: 22
Views: 5518

Re: Quick record on AM

Hi Scott, If you strip the carrier from an AM Signal (this is what DC-Block or ANF are doing) it won't be AM anymore but DSB. If you try to AM-demodulate a DSB signal (this is what you do if you playback former signal in mode AM) you will get heavy distortion. Playing back the same recording in mode...
by DL2XY
Sun Dec 10, 2017 11:41 pm
Forum: PowerSDR mRX
Topic: Quick record on AM
Replies: 22
Views: 5518

Re: Quick record on AM

After severe testing and examining the source i have come to the following conclusions: There are two distinc ways to record wave data. IF (IQ)- Record: This one is meant to take a snapshot of a wider bandwith for later examination (you can even tune within the recorded bandwith) or as input file fo...
by DL2XY
Sun Dec 10, 2017 2:25 pm
Forum: PowerSDR mRX
Topic: Quick record on AM
Replies: 22
Views: 5518

Re: Quick record on AM

Hi,

every things are working fine with record/playback, even in AM.
Just do not supress the carrier by having checked "Setup/DSP/AM/DC-BLOCK" during record!

73 Walter
by DL2XY
Sat Nov 25, 2017 11:21 am
Forum: Digital ("Virtual") Audio
Topic: What form is IQ VAC?
Replies: 10
Views: 4309

Re: What form is IQ VAC?

Hi Bryan,

Many thanks for your advise.

Finally i wangled to get VS up and running...

First builds look promising.
My "personal Edition" now supports IARU Region1 60m Band definition without the need to use the "Extended" Region setting.

73 Walter [DL2XY]
by DL2XY
Sat Nov 25, 2017 10:36 am
Forum: PowerSDR mRX
Topic: PowerSDR mRX PS 3.4.6 Released
Replies: 33
Views: 8145

Re: PowerSDR mRX PS 3.4.6 Released

Hi, I can confirm the issue. In tune mode spectrum and waterfall displays are showing much less signal. The difference depends on band selection. VAC, MIC and internal Signal Generator inputs are showing correct values. Output power is not effected. edit: Changing S-ATT in TUN cancels the difference...
by DL2XY
Sun Nov 19, 2017 4:18 pm
Forum: Digital ("Virtual") Audio
Topic: What form is IQ VAC?
Replies: 10
Views: 4309

Re: What form is IQ VAC?

AFAIK, MultiPSK and Dream only receive IQ, they do not transmit it. Scott, I'm not sure about IQ-tx in Multipsk (IQ-rx is supported) , but Dream definitly can. Just start it "dream -t" to get in tx-mode. dream_config.jpg This is a 10kHz wide DRM signal output by Dream displayed with one o...
by DL2XY
Sat Nov 18, 2017 9:27 am
Forum: Digital ("Virtual") Audio
Topic: What form is IQ VAC?
Replies: 10
Views: 4309

Re: What form is IQ VAC?

There are at least two programms i know, Multipsk and Dream DRM.
But my main interest would be the use of IQ-TX in my own DSP programming experiments.

73 Walter

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