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Maybe the series resistances of the crystals you have is just too high to oscillate in that circuit.? Crystals have much higher equivalent series resistance at their overtones than they do at their

Jim, Thanks for the reply.? I understand your reasoning, but I'm just trying to understand why it doesnt work at all. Then I could worry about whether it was on frequency.? I already have a tiny SA,

Andrew, I already found it. If you follow the post on eevblog, I ordered memory and will replace them. have a good day. cdt

Are you still trying to make that work with a 20 MHz fundamental crystal?? It can probably be made to oscillate in an overtone oscillator circuit, but it won't be on 100 MHz.? It will probably be

Hi, This url from Yokogawa https://cdn.tmi.yokogawa.com/IM701610-01E.pdf enjoy

Nigel, Did you use just any 20 MHz crystal, or did you purchase special "overtone" crystals. I emailed Wes Hayward who has written books on the subject and he said that regular crystals will work, but

I had started the Specan project back in 2019, and have just now got back into the project. ?My last activity had been to build the 100 MHz oscillator. ?I used ugly style construction with Me Pads.

Hello, Does anyone have the DL1640 manual service? If he has the schematic, it’s even better! I’m struggling with a repair. I have a post on Eevblog forum Oscilloscope YOKOGAWA LD1640 - Page 1

Submit a note. I inadvertently removed the filter capacitor on the Encoder during the process of continuous disassembly and assembly, because I tried to increase the filter capacitor before modifying

Thank you for your suggestion. I used the jumper to find the problem of the RF switch. I checked the SI4432 module you used carefully and found that GPIO0 and GPIO1 should be interchanged. Finally, I

The RF signal is not getting to the receiving Si4432, so the calibration messes things up.? There is no code in my version to detect this (there is in Erik's TinySA).? We need to find out where the

I should not get the calibration step. As long as I enter - 30 in the calibration menu, the bottom noise will jump from the bottom to the top - 30 db, just like I calibrate the bottom noise, and every

This is caused by calibration. I didn't pay attention when uploading photos. It wasn't like this at first. Here is the screenshot after I tried to format flash(LF-no-calibration); I found that as long

That does not look good. The maximum signal input to the device must be < 0dBm, ideally < -30dBm. With nothing connected to the input and frequency span as you have, the level should be around

LF does not have such a problem. There is a frequency point occasionally, but it is not so many frequency points as HF; I have tried to open output and close TG and REF in the LF interface, but it

Do you get the same effect when scanning the lower frequency range? I think also you may have found a bug.? Tracking and spur reduction should not work in the high range, only the low range.? It is

The attachment is here.

Thanks for m0wid's detailed answer. I saw my_ SA code, I'm still confused about why the schematic diagram notes 470MHz, the code is 447, and the 3767 package of the code note is not QCC8C. I now

Interesting to hear of different techniques.? The first one I built by hand and used a heat gun and normal solder, the second in someone else's reflow oven using a stencil and paste.? Both are

re, Dave, m0wid Can you tell us more about that please cdt