Search found 99 matches

by AB2EZ
Sat May 15, 2021 5:53 pm
Forum: Thetis
Topic: Changing Windows 10 Network Throttling Index for Better Performance
Replies: 32
Views: 45289

Re: Changing Windows 10 Network Throttling Index for Better Performance

This worked great for me: Apache 10E + latest Win10, running VAC without resampling, FT8, monitoring RF output waveform on an oscilloscope: Prior to changing the throttling index I was seeing roughly 2 glitches (more or less) in each 15 second FT8 transmission period. Each glitch appears as a 5.3 mi...
by AB2EZ
Wed Apr 21, 2021 3:10 am
Forum: Thetis
Topic: Noise Burst on initial transmit
Replies: 89
Views: 25854

Re: Noise Burst on initial transmit

Why not place a relay between the microphone and the preamplifier/sound card, so that the microphone is disconnected when receiving? Use the PTT output of the ANAN (the same output as is used to key an external RF amplifier on) to activate the relay between the microphone and the preamplifier sound ...
by AB2EZ
Mon Feb 15, 2021 8:32 pm
Forum: Everything Else: Antennas, Relays, Switches, Power, Grounding, Cooling, etc.
Topic: Anan 10 Transmit Problem
Replies: 1
Views: 1786

Re: Anan 10 Transmit Problem

Jon The symptoms suggest that excessive RF is getting into your computer via (for example) the USB connections, or various audio cables, or the AC wiring. I suggest that you try using various methods to block the RF... like installing ferrite cores on cables that run between the ANAN and the compute...
by AB2EZ
Thu Oct 22, 2020 4:19 am
Forum: Thetis
Topic: Thetis 2.8.11 Released!
Replies: 232
Views: 231848

Re: Thetis 2.8.11 Released!

Thanks for the new update most of the problems on my Anan 10e have now been solved. But i still have a pure signal issue if i run pure signal with dup on in protocol 1 pure signal seems to be working but the pan adapter freezes on transmit and returns when in rx i still don't know if this is just a...
by AB2EZ
Sat Aug 15, 2020 12:38 am
Forum: PureSignal Operations (PowerSDR & Thetis)
Topic: Anyone ever run Pure Signal with a non-linear amplifier? Say a class C?
Replies: 6
Views: 4973

Re: Anyone ever run Pure Signal with a non-linear amplifier? Say a class C?

An RF amplifier biased close to cutoff (just above cutoff) will still have a fairly linear relationship between the amplitude of the input envelope and the amplitude of the output envelope. Therefore it is no surprise that Pure Signal will work essentially the same as it does with a typical “linear”...
by AB2EZ
Tue Jun 11, 2019 3:01 am
Forum: PowerSDR mRX
Topic: When PowerSDR won't start or exhibits bizarre behavior (database reset/removal)
Replies: 12
Views: 47038

Re: When PowerSDR won't start or exhibits bizarre behavior (database reset/removal)

Scott When I used the approach of deleting the whole folder, and then starting the SDR application, the application recalculated all of the real and complex FFT’s. That process took about 10 minutes on my computer. When I used the approach of just deleting/replacing the “database” file, I avoided th...
by AB2EZ
Mon Jun 10, 2019 5:44 pm
Forum: PowerSDR mRX
Topic: When PowerSDR won't start or exhibits bizarre behavior (database reset/removal)
Replies: 12
Views: 47038

Re: When PowerSDR won't start or exhibits bizarre behavior (database reset/removal)

An additional thing to try... that is less time consuming than deleting the entire PowerSDR mRX PS folder... in situations where the PowerSDR mRX application will not open (i.e. where you can't access the database reset function): 1, Open the PowerSDR mRX PS folder located at C:\Users\username\AppDa...
by AB2EZ
Fri May 31, 2019 5:02 pm
Forum: Everything Else: Antennas, Relays, Switches, Power, Grounding, Cooling, etc.
Topic: ANAN-10E: rubber feet melting
Replies: 0
Views: 3237

ANAN-10E: rubber feet melting

Hi! I have an ANAN-10E that I have been using for several years. It is standing on one side... with the white bottom cover label facing forward. I have a small fan blowing air over the heat sink. This morning I noticed that the 4 gray rubber feet that came with the unit are melting. If I touch one, ...
by AB2EZ
Wed Aug 22, 2018 12:18 am
Forum: PureSignal Operations (PowerSDR & Thetis)
Topic: Anan 10e, k19 mod yes or no?
Replies: 10
Views: 11429

Re: Anan 10e, k19 mod yes or no?

Below is the text of the description of the approach I use. The block diagram is here: https://groups.yahoo.com/neo/groups/apache-labs/photos/photostream/lightbox/1997804010orderBy=mtime&sortOrder=desc&photoFilter=ALL#zax/1997804010 https://xa.yimg.com/kq/groups/hiRMJl7kf9mLgDwT0g--/hr/SCC_Q...
by AB2EZ
Tue Aug 21, 2018 11:23 pm
Forum: PureSignal Operations (PowerSDR & Thetis)
Topic: Anan 10e, k19 mod yes or no?
Replies: 10
Views: 11429

Re: Anan 10e, k19 mod yes or no?

I suggest that you read my post on the Apache Labs Yahoo Group site: post #21345 dated December 8 2015. This post explains how to provide Pure Signal input from an external amplifier to an ANAN10E without making any internal mods to the transceiver. This approach has been working fine for me for ove...
by AB2EZ
Sun Jul 22, 2018 10:18 pm
Forum: PowerSDR mRX
Topic: Panadapter level reading when using "tune"
Replies: 3
Views: 4562

Re: Panadapter level reading when using "tune"

Based on the behavior that I am observing... I suspect that the step attenuator's actual value (independent of the S-ATT setting shown on the GUI) is being set to 31dB when you first select tune mode. Then, when you change the S-ATT setting (while still in tune mode), the step attenuator 's actual v...
by AB2EZ
Sun Jul 22, 2018 7:08 pm
Forum: PowerSDR mRX
Topic: Panadapter level reading when using "tune"
Replies: 3
Views: 4562

Re: Panadapter level reading when using "tune"

Walter Thanks... that works! While in "tune" mode... I changed the S-ATT setting from 19dB to 20dB... and the panadapter reading changed from about 10dB too low to the correct reading. Yes... if I cycle tune off and back on... then the panadapter reading returns to about 10dB too low. Inte...
by AB2EZ
Sat Jul 21, 2018 7:43 pm
Forum: PowerSDR mRX
Topic: Panadapter level reading when using "tune"
Replies: 3
Views: 4562

Panadapter level reading when using "tune"

Just a reminder of a problem that first came up several HPSDR releases ago... and still remains in release 3.4.9. I am using an ANAN-10E, but I believe this problem exists on other models as well. In "tune mode" (but not in other modes such as two tone, or normal transmit operation), with ...
by AB2EZ
Mon May 07, 2018 6:20 pm
Forum: Digital ("Virtual") Audio
Topic: Buffert settings just for fun...
Replies: 6
Views: 8602

Re: Buffert settings just for fun...

I am using a pair of VB-Audio virtual cables (https://www.vb-audio.com/Cable/) to connect my ANAN-10E's VAC 1 digital i/o to my WSJT-X application's digital i/o. VAC-1: the selected Driver is MME, the Buffer Size is set to 512, the Sample Rate is set to 48000, the Latency is set to 50 (manual) VB Au...
by AB2EZ
Mon Apr 30, 2018 3:37 pm
Forum: Digital ("Virtual") Audio
Topic: VMB Virtual Cables: cross connect or not?
Replies: 3
Views: 6304

Re: VMB Virtual Cables: cross connect or not?

Scott Could it be that the block diagram of VMB is not what you are assuming it to be? I.e. Could it be that each of the two virtual inputs of VMB is the input end of a 1-way (unidirectional) virtual cable... with the other end terminating on an associated digital cross-connect (but not directly con...
by AB2EZ
Sun Apr 29, 2018 4:09 pm
Forum: Digital ("Virtual") Audio
Topic: VMB Virtual Cables: cross connect or not?
Replies: 3
Views: 6304

VMB Virtual Cables: cross connect or not?

Scott et al. When I use the VMB virtual cables for VAC1, I have used them as recommended by Scott: E.g. VAC1 output from transceiver => VMB virtual channel input. VMB virtual channel => B2 (aux virtual channel output) . WSJT input => Aux VMB virtual channel output But, everything seems to work fine ...
by AB2EZ
Sun Apr 29, 2018 3:37 pm
Forum: Digital ("Virtual") Audio
Topic: Coherent IQ Streams for Adaptive EME
Replies: 43
Views: 35048

Re: Coherent IQ Streams for Adaptive EME

Conrad
et al.

I am very much enjoying reading and following this discussion.

Thank you
Stu
AB2EZ
by AB2EZ
Thu Apr 26, 2018 2:33 pm
Forum: Hermes 14-bit Firmware (10E, 100B)
Topic: 10 or 10E
Replies: 2
Views: 16164

Re: 10 or 10E

Chuck

If you turn the 10XXX over you can tell if it is a 10E or not. A 10E has a small slide switch in the center of the bottom cover. The 10 does not.

Stu
by AB2EZ
Sun Apr 01, 2018 7:41 pm
Forum: Digital Mode, Rig Control & Logging Software
Topic: Amplitude modulation on 'constant envelope' modes
Replies: 19
Views: 15582

Re: Amplitude modulation on 'constant envelope' modes

Conrad

Hi!

Any update? E.g power out v. FT8 tune frequency?

Stu
by AB2EZ
Mon Mar 26, 2018 6:45 pm
Forum: Digital Mode, Rig Control & Logging Software
Topic: Amplitude modulation on 'constant envelope' modes
Replies: 19
Views: 15582

Re: Amplitude modulation on 'constant envelope' modes

Conrad If you change the WSJT-X FT8 tune frequency in 500Hz steps... between 500Hz and 2500Hz... what are the corresponding output power readings... relative to the 500Hz reading? Also, have you tried toggling the transmit equalization on and off to see if the transmit equalizer is “stuck” in the ac...
by AB2EZ
Sun Mar 25, 2018 5:40 pm
Forum: Digital Mode, Rig Control & Logging Software
Topic: Amplitude modulation on 'constant envelope' modes
Replies: 19
Views: 15582

Re: Amplitude modulation on 'constant envelope' modes

Conrad Since A) You see no amplude modulation when using WSJT in tune mode ... with a given nominal frequency (e.g. 500 Hz)... but you see a variation in the RF output when you change the nominal frequency. B) You have looked directly at the audio output of your sound card (digital audio interface),...
by AB2EZ
Sat Feb 24, 2018 5:36 pm
Forum: PureSignal Operations (PowerSDR & Thetis)
Topic: Accuracy re fidelity on/with the TX display while using PS
Replies: 33
Views: 29052

Re: Accuracy re fidelity on/with the TX display while using PS

Rob Yes... doing this measurement with an auxiliary receiver in the same location as one's transceiver/amplifier is much more complicated than it appeared to be when we first thought about it. Even with the relatively low internal crosstalk levels in the more recent ANAN-XXX products, I remain skept...
by AB2EZ
Tue Feb 20, 2018 7:53 pm
Forum: PureSignal Operations (PowerSDR & Thetis)
Topic: Accuracy re fidelity on/with the TX display while using PS
Replies: 33
Views: 29052

Re: Accuracy re fidelity on/with the TX display while using PS

Rob I think your latest posted measurement results are very helpful, but: You wrote "The third-order IMD results were not as good as seen when running the transmitter into the dummy load where the signal strength into the receiver ranged between 20dB to 30dB over S-9. I think I would agree with...
by AB2EZ
Tue Feb 20, 2018 7:32 pm
Forum: PureSignal Operations (PowerSDR & Thetis)
Topic: Accuracy re fidelity on/with the TX display while using PS
Replies: 33
Views: 29052

Re: Accuracy re fidelity on/with the TX display while using PS

Gary

You appear to have misunderstood my recent post. Please read it again.

Stu
by AB2EZ
Tue Feb 20, 2018 5:32 am
Forum: PureSignal Operations (PowerSDR & Thetis)
Topic: Accuracy re fidelity on/with the TX display while using PS
Replies: 33
Views: 29052

Re: Accuracy re fidelity on/with the TX display while using PS

Rob Scott Thinking about this some more.... The power leaving the transceiver is only around 13dB less than the power leaving the external amplifier. With a dummy load attached to the external amplifier (and with the amplifier input being equivalent to a dummy load at the output of the transceiver)....
by AB2EZ
Mon Feb 19, 2018 9:46 pm
Forum: PureSignal Operations (PowerSDR & Thetis)
Topic: Accuracy re fidelity on/with the TX display while using PS
Replies: 33
Views: 29052

Re: Accuracy re fidelity on/with the TX display while using PS

Scott
Rob

Assuming that the software being employed with the RSP1 allows one to increase the averaging time... shouldn't one be able to significantly reduce the effect of phase noise in the panadapter display produced in the 2-tone test by increasing the averaging time to a much larger value?

Stu
by AB2EZ
Mon Feb 19, 2018 6:58 pm
Forum: PureSignal Operations (PowerSDR & Thetis)
Topic: Accuracy re fidelity on/with the TX display while using PS
Replies: 33
Views: 29052

Re: Accuracy re fidelity on/with the TX display while using PS

Rob The 2-tone spectrum looks reasonably clean on the RSP1 display... but it is difficult to confirm that the IMD products are more than 40dB below the principal tones. I.e. -53dm - (-93dBm). On the SSB displays... its appears (with some interpretation to ignore the 2nd peak on the RSP1 display) tha...
by AB2EZ
Sun Feb 18, 2018 7:19 pm
Forum: PureSignal Operations (PowerSDR & Thetis)
Topic: Accuracy re fidelity on/with the TX display while using PS
Replies: 33
Views: 29052

Re: Accuracy re fidelity on/with the TX display while using PS

Rob I'm thinking of buying an RSP1A from HRO If you are transmitting with your ANAN + external AMP... and also using your RSP1 for monitoring your amplifier's RF output spectrum... How do the 2-tone spectrum readings of IP3 compare (ANAN DUP vs. RSP1) when you have a) Pure Signal turned off b) Pure ...
by AB2EZ
Sat Feb 17, 2018 6:06 pm
Forum: PureSignal Operations (PowerSDR & Thetis)
Topic: Accuracy re fidelity on/with the TX display while using PS
Replies: 33
Views: 29052

Re: Accuracy re fidelity on/with the TX display while using PS

One of the things that could cause a disparity between the DUP display and the actual RF output spectrum of the amplifier is non-linearity being introduced by the the coupler. I.e. if the output of the coupler's sampling port is not linearly proportional to the RF output of the amplifier* Therefore,...

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