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IIRC, the marker is labeled 2ns to (whatever), which makes me suspect that there was never intended to be a marker out at 1 ns.? Haven't looked at the output, though. Harvey

I guess my next question would be: is that horrible 40mV p2p signal coming out of the MARKER OUT "normal" in 1ns mode? Yuck. I can see how mitigating coupling through the contacts of K450 could be

To a first approximation the transition wouldn't matter. I'd just use any old BNC-to-croc clips cable, and then ignore any reflections at the beginning of the trace. I wonder if intact bulbs would

Ah, misunderstood. I've looked a bit at the ST Nucleo boards, and there are some with a good CPU that have a separate USB input and output which should support the functions you want.? How to do the

Ah! Thank you Raymond. I was not clear on how the 1ns/2ns switches were operating K450. I did not get that 1ns switches K450 back off. Now that I go back and reread the Circuit Description it

When I fixed mine, I found the best tool for adjusting and looking at the two fastest outputs was a spectrum analyser. Dan

S350-1 and S350-2 are closed in the 1-2-5 ns position. With collector of Q270 low (Out of Lock filter), S450B (2ns) connects Marker Out to C515 (2ns signal) via K450-S1 K450. With 1 ns button

I've added the photo album "TG501 2ns 1ns waveforms" showing what I'm seeing switching between 2ns and 1ns modes: /g/TekScopes/album?id=270466 I suspect this is _not_ expected

Hi Jim- No, it was a very old run of romex that was installed long before we bought the house. And you're right, if they had cut it with the switch on, we'd'a known it at the time!

Hi Holger, I looked briefly at Teensy 2.x and maybe 3.x a few years back. It seemed promising. But that's as far as I got. IIRC, my understanding was that the Teensy board comes preprogrammed with

The following photos have been uploaded to the TG501 2ns 1ns waveforms ( /g/TekScopes/album?id=270466 ) album of the [email protected] group. * 20211202_113057 (Medium).jpg (

On Thu, Dec 2, 2021 at 10:56 AM, Harvey White wrote: > > Couple things on USB that might help. > > You can easily buy a TTL to USB converter.? Takes TTL level (as from > uart/usart) signals,

I just did a few experiments using a 7103 (1 Ghz) scope, in which I had a 7A29 (1Ghz) and a 7A19 (500 Mhz). Using a TG501, and having calibrated each with a PG506, you get (roughly) the following

Couple things on USB that might help. You can easily buy a TTL to USB converter.? Takes TTL level (as from uart/usart) signals, either 3.3 or 5.0 volts, and translates them to a USB signal.? That

FYI: Both my TG501's show the following at 1ns, using ordinary RG58C/U cable: In 7854/7S11/7T11A/S-4 (BW ca. 14GHz): 320mVpp in 7904 with 7A29: 200mVpp Spec for the TG501 is >= 200 mVpp @

Hi Chris! Yes, at least the Teensy 4.1 supports that mode. You can even use one of the USB ports as an HID host for incoming data and the other USB port can emulate a keybord for sending data to

You didn't have it in a conduit?? That cut could be spectacular if the line were energized!? ? ? ?Jim Ford?Sent from my Verizon, Samsung Galaxy smartphone

Chris, you NEED one! :-) The first time I tried this was many years ago and out of a string of 100 bulbs, it found each of 13 open bulbs! Oh, that that time I was actually using a 1S2 in a 556

Hi Paul- These are incandescent but LEDs should work fine too. One nice thing is that the display reacts so quickly, so that when you move the string around you can spot intermittents, even if

I've also use a TDR to find where the yard men cut the romex going to our front lamp post as well. Such a useful tool! :-) Tom