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'[OT] Which digital storage scope to buy'
1998\07\13@124747 by Pavel Korensky

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Dear friends,

Finally, I decided to buy a new toy - digital storage oscilloscope as a
replace to my old analog storage oscilloscope (the one with memory CRT).

After extensive data-mining on the Web, several phones to distributors
etc., I found two problems.

1. I can't afford scopes which I like ==> No LeCroy :-((
2. There is a lot of scopes and every manufacturer describe in the
datasheets only those parameters which are good. Bad parameters are not
mentioned (like missing delayed trigger on TDS220) :-)))

After comparing etc., I decided that I can afford one of these:

1. TDS 220 (nice, small, but no trigger delay, strange low price)
2. TDS 340 or TDS 360 (my current favorite)
3. HP 54600B (cheap)
4. HP 54602B (four channels)
5. HP 54645A (something called MegaZoom etc. recommended to me by HP
representative, after I explained him that I really don't want Infinium)

Does anybody have a personal experience with some of these scopes ? Any
other ideas, hints etc. ?

I can spend approx. 4.000 USD, I don't want some Far East equipment and I
am not living in US, so secondhand equipment is not the option.

I would like to have: as much BW as possible, as much memory as possible,
as much sample rate as possible, as much channels as possible, cursor
measurement. FFT and RS-232/GPIB would be nice, but it is not necessary.
Also, the scope should be as reliable as possible, I suppose that I will
use it another 10 - 15 years.

Thank you for any help

Best regards

PavelK

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1998\07\13@132841 by David VanHorn

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>After comparing etc., I decided that I can afford one of these:
>
>1. TDS 220 (nice, small, but no trigger delay, strange low price)
>2. TDS 340 or TDS 360 (my current favorite)
>3. HP 54600B (cheap)
>4. HP 54602B (four channels)
>5. HP 54645A (something called MegaZoom etc. recommended to me by HP
>representative, after I explained him that I really don't want Infinium)
>
>Does anybody have a personal experience with some of these scopes ? Any
>other ideas, hints etc. ?


Generally, engineers are Tek-ish or HP-ish. Not a lot of swapping between
the
camps.   Fluke has a nice instrument line called "Combi-Scope" or some such.
I was about to buy it (in the 4k range) but I got a great deal on a TDS420
with
full boat options, so I got that instead.

Also, ask about demo units, they usually have one kicking around that's
brand new
except it's been out on a few demos. These are excellent buys!

Good luck!

1998\07\14@053121 by Pavel Korensky

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At 12:18 13.7.1998 -0500, you wrote:
>camps.   Fluke has a nice instrument line called "Combi-Scope" or some such.
>I was about to buy it (in the 4k range) but I got a great deal on a TDS420

Thanks, I will look at it.

>Also, ask about demo units, they usually have one kicking around that's
>brand new
>except it's been out on a few demos. These are excellent buys!

Hmm, problem is, that I am living in the country where these services are
not yet established. I tried to ask about some demo units etc. because I
hoped that I can get better instrument for same money, but all dealers told
me, that they have no or one demo unit and they will not sell it.

PavelK

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* Pavel Korensky                                                         *
* DATOR3 LAN Services spol. s r.o.                                       *
* Modranska 1895/17, 143 00, Prague 4, Czech Republic                    *
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1998\07\14@100823 by Montaigne, Mike

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I have been using scopes for longer than I care to admit.  We purchased a
TDA-420A a couple of years ago.  Great scope but no-one here (8 technical
people, most who believe in using scopes and a few who don't) will use it.
It is (imho) not very user friendly.  I have used it to sort out some hairy
problems, but have to spend an hour or so re-learning how to use it.  Most
of the time, I'll just grab an old analog scope for quick measurements.  If
you are using it every day, its great.  If you just have to grab it once in
a while to fix a problem, look elsewhere.

{Quote hidden}

1998\07\14@204308 by wwl

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On Tue, 14 Jul 1998 10:06:38 -0400, you wrote:

{Quote hidden}

If you can afford the HP 54645A go for it. The megazoom is extremely
useful when dealing with microcontroller type stuff, like serial
streams, I2C busses etc. Basically it means the scope captures a
million data points (subject to sample rate limitations), so you can
zoom in & out to see the overall structure etc. then zoom in to
specific edges, either in realtime or on single shot events.
The user interface is very fast & responsive - as good as an analogue
scope. also has good glitch trigger modes and an infinite persistance
mode useful for catching occasional glitches and problems.
If you can stretch a bit more, go for the 54645D, which gives you 16
digital channels as well, but still behaves more like a scope than a
logic analyser.
    ____                                                           ____
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/_W_/  Industrial / Computer Peripherals / Hazardous Area      /_W_/

1998\07\15@143806 by Ben Hamlett

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I work at a Fluke dealer and they have many scopes
Check them out http://www.idahoinstrument.com

Mike Harrison wrote:

{Quote hidden}

1998\07\15@153135 by David W. Duley

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In a message dated 98-07-15 14:38:22 EDT, you write:

<<
I work at a Fluke dealer and they have many scopes
Check them out http://www.idahoinstrument.com

Mike Harrison wrote:
 >>
Hi Mike,
I've got a question for you.  Since you deal with Fluke maybe you would know
the answer.  I have a Flukemeter model 99A.  I would like to upgrade to the
99B version or the 105.  Is there any trade-in value for my scope?  I love the
scope but the displays they used on the older 99's  sucked.  The backlight is
worthless.  The new ones have really nice contrast.

Dave Duley

1998\07\16@062819 by Pavel Korensky

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At 12:43 15.7.1998 -0600, you wrote:
>I work at a Fluke dealer and they have many scopes
>Check them out http://www.idahoinstrument.com
>

Thx, I already contacted dealers of all major manufacturers in my country
(incl. Fluke). I posted the question, because I would like to know the
personal opinions of peoples from the list. Opinions of dealers are
sometimes slightly "biased" :-)

BTW, Fluke CombiScopes are good. Currently I am deciding between HP54645A
and Fluke CombiScope 3380B. Both have their pros and cons. HP has much
better memory, Fluke has nice analog part.

Best regards

PavelK

**************************************************************************
* Pavel Korensky                                                         *
* DATOR3 LAN Services spol. s r.o.                                       *
* Modranska 1895/17, 143 00, Prague 4, Czech Republic                    *
*                                                                        *
* PGP Key fingerprint:  F3 E1 AE BC 34 18 CB A6  CC D0 DA 9E 79 03 41 D4 *
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