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The use of subharmonic sampling is not so much to allow the mixer to operate at a lower rate. The switches in the QSD work reasonably well up to 10 meters, and they are used that way in the Ensemble

Thanks everyone for setting me straight on how the receiver uses the supplied crystals. This is something I may have read but didn't really understand. 73s to all. de Jack W6VMJ

Success, installed HDSDR and the ExtIO DLL, set it to transmit with DL6IAKs tone generator and got 8.46 V on the RF probe at the bnc jack. John Stockman, KC2THY

Hey Robby, Sure no problem. I'm sure it could be clearer, but hopefully got the idea of the "sampling" for others to understand. 73 and thanks for all your work !! Mike Collins KF4BQ

Thanks, Mike. As my motto is "steal from the best with pride", do you mind if I lift most of your fine exposition onto my web pages?

Hi Robby, That actually has it wrong. The statement: * The two quadrature signals from the Divider stage are fed into the mixer stage. The 4.6825 MHz quadrature signals from the divider in

See, also, http://wb5rvz.org/softrock_lite_ii/02_lo (the discussion on sub-harmonic sampling)

Thank you, I am doing much better now. ?I am still wondering why I cannot get the wave form to come out correctly though.

I reinstalled the USB driver, CFGSR, and Rocky. I get 0V on R35 with Rocky in transmit mode, but get 13V on R35 when I activate PTT from CFGSR, with Rocky off. Also get a much higher voltage on the

Original Message ----- Subject: [softrock40] Crystals in Softrock LTE combined kit A scope will not help:) https://groups.yahoo.com/neo/groups/softrock40/conversations/topics/29210 and other

On 20m and 30m, the Softrock Lite II uses 1/3 subharmonic sampling. That means that the final sample rate isn't 14 MHz on 20m, it's 14 divided by 3. The actual rate with that crystal is 4.6825MHz for

I really don't understand what is happening with the crystals for 20 meters operation. I understand that the counter needs a frequency that is four times that of the received signal to produce the two

Hi! How are you? People say it works http://blisshythm.com/lut/view.php ajsoenke@...

In order to see sparking/arcing, you need to either have considerable CURRENT flowing or a significant voltage difference between your RXTX and the voltmeter. What is connected to the RXTX? What is

Original Message ----- Subject: [softrock40] RXTX sparking and arcing (still having waveform issues) You must have an intermittent short circuit on the power line. Probably the 12V line. Look

I had a question about the completed softrock kit. I put the kit together, and found out that the waveform shown in HDSDR was uniform across all bands and modes. In addition, when I go to test the

Correction, 0V on R35 and 12.8v on R34. John Stockman, kc2thy

Made sure that Rocky's audio and I/Q were configured correctly and measured transmit and receive voltages on the hairpin of R34. Both were zero, so it looks like the transmit is not being keyed.

Hello Alan, thanks again, I have both of them :) - the amplifier wouldn't be problem, but without is more simple. 73, Ervin HA2OS

Original Message ----- Subject: Re: [softrock40] Info about SoftRock Lite II for IF monitoring the kit? I mean: signal generator, oscilloscope, ...? Ervin, Nothing really.. But a multimeter, and