have a spur in the 22-25 MHz range, but that was addressed by changing what features and modes we use on the AD9866. The Hermes-Lite 2 and all derivatives I know of (radioberry, square

only one spur attenuated) when "ADC0 overload" appears on the display. The problem appears to be the automatic tx attenuation part is not working as it should. The only difference

Re: Spur on 160m new Hermes Lite 2 Steve I understand and agree with your assessment on the HL2 160m spur issue. Unfortunately Thetis 2.10.3.5 Beta2 does not turn on the HSYNC clock, you

was a spur at 56mhz that was only down about -40db. I contacted the company and was told that was "normal". Buyer beware. 73, Don K9AQ On Wednesday, February 9, 2022 at 11:17

SR (spur reduction) is off > CW Skimmer Configuration > 1. Set the Radio Type to SoftRock (NOT SoftRock-IF) > 2. Set the CW Pitch to 600 (or whatever you use for the PowerSDR Pitch

the nasty spur coming through at 10 MHz with the VersaClock 6 driven >>>>>>> through a 10 MHz reference is sobering. Presumably that's also in the >>

here: > > > https://groups.google.com/forum/#!searchin/hermes-lite/spur%7Csort:date/hermes-lite/QTbdlD1sfYY/l6s2v__EAQAJ > > 73 > > Max >

. The spur I was seeing on 15m was with the MRF-101 HL2 PA board connected and no N2ADR PCB. At the moment I have this PCB temporarily lashed up about 50 mm above the HL2 PCB. The signal routing

power supply spur pickup by the 160M LPF. 73, Steve kf7o On Thursday, May 28, 2020 at 1:03:03 PM UTC-7, Winston wrote: > > An alternate N2ADR board that supports a separate receive

the 160m spur is it still necessary to do the 2 resistor mod > mentioned in the wiki? or is it just a matter of using the latest SparkSDR. > > John > G3UGY > > > On 13/

> nonharmonic spur. The last HL1 gateware supported only the TxDAC. You have > to use an earlier gateware if you are trying to use the IAMP. > > 73, > > Steve > kf7o

at 3:31:01 AM UTC-7, James Ahlstrom wrote: > > Hello Steve, > > Maybe the default should be to move the spur. I don't see a reason not to. > > Jim > N2ADR > >

recent dc spur > on the new nco code I wonder if that might also explain why no differences > showed up? I'm thinking of porting my adc linearization code to HL2 and > will

bad nonharmonic spur when using this which made it very hard to make the transmitter legal on 15M to 10M. We switched to the TxDAC and external RF preamp. This eliminates the spur and the

causing the spur in real use. I didn't see any difference in simulation which is why I originally went with truncation. Maybe my simulation FFT needs to be longer... Thanks and 73

a small spur at 20.480Mhz, does this show > up in your simulation? I don't think it matters but I was able to reduce it > at the expense of more gates > https://groups.google

give worse spur >>> levels might suggest there is some coupling with the magnetic field from >>> the DC/DC converters inductors. Those inductors are described

a small spur at 14.02 MHz, but this is only 15 dBm above the noise >> floor, not 50 like in your screenshot. Plus, this is more likely an >> artifact of the test using the same

see the spur but there are fewer as you tune off. I tried with EXTRA_BITS set to 8 in cordic.v this makes it barely perceptible on my radio, unfortunately it uses up gates and only 2 receivers

an exhaustive spur search on the RX. Interestingly there is currently a thread on the EMRFD Yahoo group about the possibility of interferences from I2C clocks on radio boards; IIRC

the > spur without increasing the input width to the first cic. I wonder if we > can actually reduce the input to the cic to save resources. > 73 Alan M0NNB > > On Monday,

Hi Steve, > We will have to put these in a place for people to find easily. I made a mistake of header in the document. so please use revised pdf if

Hi all, FYI, Here is my HLv2 Beta3 Low Power Tx test result. I used Quisk 4.1.10 and PowerSDR v3.3.9. there is no different result between Quisk Spot

improved cordic spur reduction is more >>> significant (reduced IMD?), or maybe my testing is flawed. I used the >>> simulator to confirm the cordic gain is 1.647

the low spur around 940 kHz, likely one of the DC/DC converters (did > not check); there is also a smaller one just above 910 kHz. > > > In the graphs above the MDS is measured

introduce a spur on 160 M band and I was looking to > eliminate this with the diode switching which is giving a comparable > performance - perhaps around 0.3 dB more through loss

the largest spur amplitude is low. There are also links in that thread to information on NCOs. You do have to truncate and round to the desired bit length sometimes. 73, Steve KF7O On Thursday

that a spur would be above the band noise. I bet WSPR could still see these spurs... Are there any ways to measure distortion through these devices? I wonder about frequencies below 10

a serious issue. That is in-band spur when Fs = > 76.8MHz setting. > See attached file. > I think 6m build option should be dropped. > > 73 Takashi, JI1UDD > > >

60dBc) spur at 44 MHz when transmitting on 10 >>> meters. >>> >>> The only surprise is "high" harmonic output on 10 meters of -40 dBc >>