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Vintage Test Gear and Workshop Equipment For discussions about vintage test gear and workshop equipment such as coil winders. |
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8th Jul 2020, 10:36 pm | #1 |
Tetrode
Join Date: Mar 2018
Location: Plymouth, Devonshire, UK.
Posts: 56
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Scopex 4D10a
Hi there all,
I've just got a Scopex 4D10a and I didnt get any probes with it, so I purchased some probes and I'm damned if I can find out how to do the compensation on the scope ! If any one can give some info I'd appreciate it. they have 1x and 10x switch. |
8th Jul 2020, 11:41 pm | #2 |
Heptode
Join Date: Jun 2009
Location: St Helens, Lancashire, UK.
Posts: 641
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Re: Scopex 4D10a
Pretty sure there is no option for probe compensation on this scope.
Channels can be compensated internally, but reference is made to do it with a Scope calibrator connected directly to the chanel inputs. If you are after a manual, look for one for a Racal 9386, as they are the same scope. If you can't find it on the web, I can send a pdf copy.
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9th Jul 2020, 8:13 am | #3 |
Nonode
Join Date: May 2004
Location: Halifax, West Yorkshire, UK.
Posts: 2,587
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Re: Scopex 4D10a
Most probes have their own compensation adjustment. Look for a small screw on the probe body.
Alan |
9th Jul 2020, 8:41 am | #4 |
Dekatron
Join Date: Feb 2003
Location: Cottingham, East Yorkshire, UK.
Posts: 5,763
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Re: Scopex 4D10a
Maybe I’m missing something, but as Alan says, every scope probe I’ve had has a small screw to tweak to adjust the compensation.
As often as not the probes have come with instructions and some included a small screwdriver. Some info re the necessity for compensation here: https://www.electronics-notes.com/ar...mpensation.php
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David. BVWS Member. G-QRP Club member 1339. |
9th Jul 2020, 8:41 am | #5 |
Pentode
Join Date: Oct 2016
Location: Maldon, Essex, UK.
Posts: 184
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Re: Scopex 4D10a
The photos show:
• Probe Compensation Instructions • Trimmer tool pointing to the trimmer • Scopex 4D10A with probe having been adjusted (Note the excellent book propping up the scope!) Most scopes have a probe adjust output that provides a square wave but the Scopex 4D10A doesn’t. I use my Aneng AN8008 which is reviewed here: https://www.vintage-radio.net/forum/...d.php?t=138122 David |
9th Jul 2020, 10:18 am | #6 |
Heptode
Join Date: Feb 2006
Location: Marlborough, Wiltshire, UK.
Posts: 917
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Re: Scopex 4D10a
If you’ve bought x1 probes (as opposed to x10 or x100), they almost certainly will not have an adjustment on the probe.
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9th Jul 2020, 10:25 am | #7 |
Nonode
Join Date: May 2004
Location: Halifax, West Yorkshire, UK.
Posts: 2,587
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Re: Scopex 4D10a
If they are switchable x1/x10 probes as stated they should have compensation adjustment.
Alan |
9th Jul 2020, 3:38 pm | #9 |
Nonode
Join Date: May 2004
Location: Halifax, West Yorkshire, UK.
Posts: 2,587
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Re: Scopex 4D10a
..... and the compensation adjustment screw can be seen just next to the switch.
Alan |
9th Jul 2020, 6:35 pm | #10 |
Tetrode
Join Date: Mar 2018
Location: Plymouth, Devonshire, UK.
Posts: 56
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Re: Scopex 4D10a
Thanks for the input, I've found out the Scopex has its probes hooked up to an external square wave generator to adjust compensation. So I have managed to find one and when it arrives I'll be able to sort it out..
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