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When I change the attenuator, I can see it clearly across the entire spectrum display. Everything just moves down. - Jerry, KF6VB

Thanks Oliver. I’ll try this dave

Hi Greg, I have a question regarding the JP1 pads between U2 and C24 on the V11 PA board. I have a zero ohm resister there now but not sure why. According to the schematic it looks like it should be a

Here's one way to test it. Load the latest code onto the Teensy. It has an option under the RF set menu to change the input attenuation. Then, put a 10 MHz (or whatever) signal into the RF_in SMA

" not much support from the Arduino crowd." I'm sorry to hear that, but not surprised. I looked at it two or three years ago when I wanted eight fairly high speed counters connected to a

You could use pointers because the indices are no different that an index except increment by one moves the byte pointer by sizeof(measure) bytes. Indeed the expression: ??????? int

Interesting project.? I have a different FPGA board waiting for my attention. I recently spent about a month working with an STM32H747XI development board (

*** HDMI? Now that *is* interesting. Is it connected to the FPGA? Is there IP available to drive it? - Jerry, KF6VB

This board has 1) an arduino processor and 2) a Cyclone 10 FPGA on the same board. It supports a variety of I/o and HDMI display interface. It sounds like a lot of cool stuff. Now, I would never use

Here's a test program I adapted for the power/SWR sensor in

Just curious - what does this particular board have going for it? Looks like not much support from the Arduino crowd. - Jerry, KF6VB

I can't remember for certain, but I think I did try using a ring buffer when we first started the project, but I couldn't get it to work correctly. Perhaps I don't understand how we get the rollover

This board is actually a lot smaller than it looks… A little bigger than a Nano but not much! Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ Owner - Operator Big Signal

*** Sure there is. Rotating buffers. Something interesting happens, the interrupt loads that fact into the rotating buffer. Does NOTHING but that. Main program checks the buffer, sees that it's not

Look for optimizations in the software.

I'm really not advocating that because I don't know what can be thrown out of the loop. As I stated earlier, not everything in the loop is interrupt-driven and I explained why. I'm not sure threading

Interrupts on the tuning encoders is a problem because you have to know where you return to after the interrupt is serviced. That's the reason we do polling on the encoder. Because interrupts can be

How do I tell if the receive PE4302 attenuator is working.? I can't tell any difference in received signals at whatever settings or when I jumper it out.? I have two RF boards built up and they

So when my desktop computer gets too slow, I just get a new one that's faster? Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ Owner - Operator Big Signal Ranch –

Consider Jack's analogy of the smoke detectors in a building.? If you start with a single story building with only a few smoke detectors, then sequentially checking the status of each one vs having