Test Equipment Anonymous (TEA) group therapy thread

[beanflying]

I am more about the Death and Martyrdom than Bunches of flowers and pissy cards on what is now ANOTHER retail spendings day. What is the equivalent of the Grinch in February

I however have dropped a Rose or Two from the garden in a letterbox stalker style in the past

Tweezer Testing looks good so far too.

[tautech]

I am more about the Death and Martyrdom than Bunches of flowers and pissy cards on what is now ANOTHER retail spendings day. What is the equivalent of the Grinch in February

I however have dropped a Rose or Two from the garden in a letterbox stalker style in the past

Right, I get it, you've had too many beers to take that on. 

Seems hotter here at home than it mostly was in Perth....been busy sweating the WA beers out filling my 10m³ firewood shed, around 1/2 way and 28C again here tomorrow. 

[beanflying]

What is this to many beers you speak of?  Still just on 30C outside.

Still Boring but better than static waves.

https://youtu.be/tDZVgeudpks

[bd139]

“Spending seasons” is what it’s all about now. If she’s not woo’ed by a kebab and a wink I’m not interested.

Not much test gear fun going on here. I had a clear day yesterday to sort out the 475A but got distracted on an old project. Thus the T440 laptop has new touchpad from a T450, extended battery, new internal battery, cleaned keyboard and a FHD IPS panel fitted. After the disastrous MacBook Air I bought and returned, this hits the spot.

[0culus]

What is this to many beers you speak of?  Still just on 30C outside.

Still Boring but better than static waves.

https://youtu.be/tDZVgeudpks

I might be biased, but Lissajous patterns are more fun on a CRT 'scope. 

[beanflying]

I have a crusty old dual beam Philips to renovate at some stage. I sort of have a plan for building a component tester  to add to it as part of the reno. but it is way down the long list. Would still consider grabbing a 400Meg Analogue if one turned up for the right $$ as a plaything and I really don't need more than what the Micsig can do.

[bd139]

Similar situation.  I’m using a.TDS210 60MHz job for everything. If I need anything more it’s in the frequency domain universally. If a cheap 2465 turns up I’m on it.

[tggzzz]

I am more about the Death and Martyrdom than Bunches of flowers and pissy cards on what is now ANOTHER retail spendings day. What is the equivalent of the Grinch in February

Victor Meldrew, of course. Good for all seasons.

How long before anonymous valentines messages fall into the #meToo category?

[beanflying]

Common Grounded Two Sig Gens @30Meg Dare anyone to pick the one worth the most. Feelcrud at max isn't all bad. Wonder if I can return the Siglent 

The 10 Meg Square is a bit of a giveaway but still not to shabby.

[bd139]

Blue one cost the most. Less abberation on those edges.

There's not a lot in it though.

Can you adjust the risetime?

[Specmaster]

@greywolf Please make double sure that the iron tip is isolated from ground otherwise you will short the ram storing the calibration data. Beware that the chassis is connected to battery circuit as well and if the iron touches chassis and also at the same time, any part of the battery circuit you also can erase the calibration data from the ram.

There is a good video on YouTube that shows the best way to replace the battery, by attaching a temp battery directly to the ram while you replace the built in battery. Just search for HP 3458A and it should appear in the results.

[beanflying]

Minimum Rise Time is 8.4nS @1V for 10-90% according to the spec so it looks about right with the higher swing. Tautech might know if it can be tweaked?

[bd139]

@greywolf Please make double sure that the iron tip is isolated from ground otherwise you will short the ram storing the calibration data. Beware that the chassis is connected to battery circuit as well and if the iron touches chassis and also at the same time, any part of the battery circuit you also can erase the calibration data from the ram.

There is a good video on YouTube that shows the best way to replace the battery, by attaching a temp battery directly to the ram while you replace the built in battery. Just search for HP 3458A and it should appear in the results.

Yes I fucked that up when I did mine 

[tautech]

Common Grounded Two Sig Gens @30Meg Dare anyone to pick the one worth the most. Feelcrud at max isn't all bad. Wonder if I can return the Siglent 

A decent DSO will show up the difference. 

Minimum Rise Time is 8.4nS @1V for 10-90% according to the spec so it looks about right with the higher swing. Tautech might know if it can be tweaked?

They're generally a little better than spec.

IIRC rf-loop got better rise times in AWG mode, but you have to use the SCPI commands .....well he did for the older SDG1k series.
Have a look at Pulse mode and/or N# cycles.
The UI is pretty straight forward but there are a few layers of it.
The first thing I do in ones I keep is change the power ON setting to Last so it doesn't power up again @ Sine 1 KHz 4V p-p.   

[beanflying]

Interesting exercise running them together. For the sake of the few $ I would get for the Feelcrud secondhand think I will keep it as it will still produce a sort of square wave to 25Meg while the Siglent is software limited to 10 (knew that before buying). So a bit more playing with both then off to 'the cupboard' for it.

Haven't checked the frequency against my GPSDO but it is much closer than the Feeltech which is 20+Hz low.

[Specmaster]

@greywolf Here is the video link I referred to to help you. 

[tautech]

Interesting exercise running them together. For the sake of the few $ I would get for the Feelcrud secondhand think I will keep it as it will still produce a sort of square wave to 25Meg while the Siglent is software limited to 10 (knew that before buying). So a bit more playing with both then off to 'the cupboard' for it.

Haven't checked the frequency against my GPSDO but it is much closer than the Feeltech which is 20+Hz low.

Square and Pulse = 25 MHz.
http://www.siglentamerica.com/wp-content/uploads/dlm_uploads/2017/10/SDG2000X_DataSheet_DS0202X-E01D.pdf

[med6753]

Similar situation.  I’m using a.TDS210 60MHz job for everything. If I need anything more it’s in the frequency domain universally. If a cheap 2465 turns up I’m on it.

Well that's a change. You've said in the past that 24XX's "scare" you because they are processor controlled. What happen? 

[beanflying]

Square and Pulse = 25 MHz.
http://www.siglentamerica.com/wp-content/uploads/dlm_uploads/2017/10/SDG2000X_DataSheet_DS0202X-E01D.pdf

Strange I thought I read 10Meg unless I had the wrong datasheet. Yep 25Meg available  Better RTFM 

[med6753]

You guys and your shitty DSO's. This is what a 10MHz square wave is supposed to look like. 

[beanflying]

You could get anyone to answer the phone with all that ringing 

[med6753]

You could get anyone to answer the phone with all that ringing 

The ringing is a function of the source, not the scope. The source is a Heath IG-4244 Oscilloscope Calibrator and it clearly states in the manual that ringing on the trailing edge is normal. So that 2465 is faithfully reproducing the source. 

Wrong number! 

[bd139]

That's typical heathkit excuse that.

"The shitty performance is shitty because we wrote it in the manual"

 

It works though

Not sure why they didn't use a 7414 (not LS!) or something in that as the output buffer. Perfectly good for the job.

[tggzzz]

Not sure why they didn't use a 7414 (not LS!) or something in that as the output buffer. Perfectly good for the job.

No way would a 74xTTL give you that ristime and a clean top!

[beanflying]

I think my brain is scrambled from to many new toys ably assisted by to many Beers for the evening

Tweezers are interesting definitely need to RTFM for them but in circuit they handle fairly well across a range of Caps.