Modern digital oscilloscopes question

[eatmorepies]

Hello

I worked in a place that gave me access to budget, non memory 20MHz CRT
scopes - I no longer work there. They were perfect for my needs.

Six years on and I find I need an oscilloscope, the market seems to have
changed. Are those cheap digital models any good?

I need reasonable Y sensitivity (5mV/div), up to 5MHz, storage would be
nice, it's not for radio work.

I found things like this...

http://www.rapidonline.com/Tools-Equipment/Uni-T-UTD2000-series-2-Channel-digital-storage-oscilloscopes-400399/?sid=2e6f6286-b98a-4994-b9ce-0631e8fc6b4d

Decent for the money? Or to be avoided?

John

 

[Phil Hobbs]

On 12/12/2011 1:32 PM, eatmorepies wrote:

Hello

I worked in a place that gave me access to budget, non memory 20MHz CRT
scopes - I no longer work there. They were perfect for my needs.

Six years on and I find I need an oscilloscope, the market seems to have
changed. Are those cheap digital models any good?

I need reasonable Y sensitivity (5mV/div), up to 5MHz, storage would be
nice, it's not for radio work.

I found things like this...

http://www.rapidonline.com/Tools-Equipment/Uni-T-UTD2000-series-2-Channel-digital-storage-oscilloscopes-400399/?sid=2e6f6286-b98a-4994-b9ce-0631e8fc6b4d

Decent for the money? Or to be avoided?

John



Half again the price of a comparable Rigol, ISTM.

Cheers

Phil Hobbs

--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC
Optics, Electro-optics, Photonics, Analog Electronics

160 North State Road #203
Briarcliff Manor NY 10510
845-480-2058

hobbs at electrooptical dot net
http://electrooptical.net

 

[Phil Allison]

"eatmorepies"

I worked in a place that gave me access to budget, non memory 20MHz CRT
scopes - I no longer work there. They were perfect for my needs.

Six years on and I find I need an oscilloscope, the market seems to have
changed. Are those cheap digital models any good?

** Not so good for service work, particularly audio service.

If you like using analogue scopes, stick with one.

Analogue scopes are easy to use and tell you no lies.

The opposite is true for digital ones.



.... Phil

 

[David Eather]

On 13/12/2011 4:32 AM, eatmorepies wrote:

Hello

I worked in a place that gave me access to budget, non memory 20MHz CRT
scopes - I no longer work there. They were perfect for my needs.

Six years on and I find I need an oscilloscope, the market seems to have
changed. Are those cheap digital models any good?

I need reasonable Y sensitivity (5mV/div), up to 5MHz, storage would be
nice, it's not for radio work.

I found things like this...

http://www.rapidonline.com/Tools-Equipment/Uni-T-UTD2000-series-2-Channel-digital-storage-oscilloscopes-400399/?sid=2e6f6286-b98a-4994-b9ce-0631e8fc6b4d

Decent for the money? Or to be avoided?

John

UNI-T is nice for a Chinese brand. You are aware that the basic 25Mhz
model is only good to about 5Mhz for digital (a 5Mhz square wave being
made up of a 5Mhz fundamental plus odd order harmonics. 25Mhz only
allows the first two harmonics, giving you a wonky square wave but it is
OK for basic stuff if you know what your looking for)


Lots of people like this scope:

http://www.saelig.com/product/PSPC017.htm


Have a look at these. They seem to meet your spec and give a bit more.


http://www.dealexcel.com/ut2062ce-digital-storage-oscilloscope-60mhz-color-screen_p332.html

http://www.dealexcel.com/ads1042c-digital-storage-oscilloscope-40mhz-500mss-usb_p650.html

http://www.dealexcel.com/mini-digital-storage-color-oscilloscope-handheld-scope-ds-203-nano-black_p19554.html

--
We have failed to address the fundamental truth that endless growth is
impossible in a finite world.

 

[John Larkin]

On Mon, 12 Dec 2011 18:32:21 -0000, "eatmorepies"
<jckipper@lineone.net> wrote:

Hello

I worked in a place that gave me access to budget, non memory 20MHz CRT
scopes - I no longer work there. They were perfect for my needs.

Six years on and I find I need an oscilloscope, the market seems to have
changed. Are those cheap digital models any good?

I need reasonable Y sensitivity (5mV/div), up to 5MHz, storage would be
nice, it's not for radio work.

I found things like this...

http://www.rapidonline.com/Tools-Equipment/Uni-T-UTD2000-series-2-Channel-digital-storage-oscilloscopes-400399/?sid=2e6f6286-b98a-4994-b9ce-0631e8fc6b4d

Decent for the money? Or to be avoided?

John

My regular scope is a Rigol DS1052E. It's great. The going price is
around $340.

I'd never go back to an analog scope or a VTVM.

John

 

[Phil Hobbs]

On 12/12/2011 5:41 PM, John Larkin wrote:

On Mon, 12 Dec 2011 18:32:21 -0000, "eatmorepies"
jckipper@lineone.net> wrote:

Hello

I worked in a place that gave me access to budget, non memory 20MHz CRT
scopes - I no longer work there. They were perfect for my needs.

Six years on and I find I need an oscilloscope, the market seems to have
changed. Are those cheap digital models any good?

I need reasonable Y sensitivity (5mV/div), up to 5MHz, storage would be
nice, it's not for radio work.

I found things like this...

http://www.rapidonline.com/Tools-Equipment/Uni-T-UTD2000-series-2-Channel-digital-storage-oscilloscopes-400399/?sid=2e6f6286-b98a-4994-b9ce-0631e8fc6b4d

Decent for the money? Or to be avoided?

John




My regular scope is a Rigol DS1052E. It's great. The going price is
around $340.

I'd never go back to an analog scope or a VTVM.

John

Hey, wait a minute. I've bought two Simpson VTVMs in the last year.
(Mostly for the nice analogue displays, admittedly. Analogue is nice
for temperature-control loops and other things that change on the time
scale of 100 ms to 10 s or thereabouts.)

Cheers

Phil Hobbs

--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC
Optics, Electro-optics, Photonics, Analog Electronics

160 North State Road #203
Briarcliff Manor NY 10510
845-480-2058

hobbs at electrooptical dot net
http://electrooptical.net

 

[Phil Allison]

"George Herold"

Yeah but an analog 'scope can't average.

** So fucking what ?

Put that together with the digital filters on the front end of the
Rigol

** Shame there are no analogue ones.

Shame how the scope keeps showing things that are not at the input - like
aliasing products, noise and signals that have stopped seconds ago.

These are fatal flaws in audio servicing.


.... Phil

 

[Phil Hobbs]

On 12/12/2011 10:27 PM, George Herold wrote:

On Dec 12, 5:41 pm, John Larkin
jjlar...@highNOTlandTHIStechnologyPART.com> wrote:
On Mon, 12 Dec 2011 18:32:21 -0000, "eatmorepies"





jckip...@lineone.net> wrote:
Hello

I worked in a place that gave me access to budget, non memory 20MHz CRT
scopes - I no longer work there. They were perfect for my needs.

Six years on and I find I need an oscilloscope, the market seems to have
changed. Are those cheap digital models any good?

I need reasonable Y sensitivity (5mV/div), up to 5MHz, storage would be
nice, it's not for radio work.

I found things like this...

http://www.rapidonline.com/Tools-Equipment/Uni-T-UTD2000-series-2-Cha...

Decent for the money? Or to be avoided?

John

My regular scope is a Rigol DS1052E. It's great. The going price is
around $340.

I'd never go back to an analog scope or a VTVM.

John- Hide quoted text -

- Show quoted text -

I like my Rigol, but to be honest I use the cheap TEK (1001B?) more
often.

I've got an old analog TEK that I'd like to bring back to life!
Not great speed, but it's got a 1mV/div input range that I used.

DSO's mostly suck at low sensitivity.... JL build's his own input
stages, I assume.

George H.

My TDS744A has a 1 mV/div range, which is still useful at 500 MHz BW.
Cost about two low-end Rigols' worth.

Cheers

Phil Hobbs

--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC
Optics, Electro-optics, Photonics, Analog Electronics

160 North State Road #203
Briarcliff Manor NY 10510
845-480-2058

hobbs at electrooptical dot net
http://electrooptical.net

 

[Phil Allison]

"George Herold"

Yeah but an analog 'scope can't average.

** So fucking what ?

I'll post some 'scope shots tomorrow.


** FFS dickwad - I own a bloody Rigol !!!

Put that together with the digital filters on the front end of the
Rigol

** Shame there are no analogue ones.

Oh I agree, But the cost would be out of control.


** Not to mention the scope would then finally,y actually have
INTENTIONALLY varying bandwidth with sweep setting.

This is the biggest LIE about DSOs and why analogue scopes are SOOOOO much
better for troubleshooting analogue circuits.

Shame how the scope keeps showing things that are not at the input - like
aliasing products, noise and signals that have stopped seconds ago.

These are fatal flaws in audio servicing.

Oh DSO's aren't for every task.


** FFS read the bloody CONTEXT !!

Here it is again - you RETARDED BIRD BRAIN !!


" I need reasonable Y sensitivity (5mV/div), up to 5MHz, storage would be
nice, it's not for radio work.

** Not so good for service work, particularly audio service.

If you like using analogue scopes, stick with one.

Analogue scopes are easy to use and tell you no lies.

The opposite is true for digital ones."



.... Phil

 

[George Herold]

On Dec 12, 5:41 pm, John Larkin
<jjlar...@highNOTlandTHIStechnologyPART.com> wrote:

On Mon, 12 Dec 2011 18:32:21 -0000, "eatmorepies"





jckip...@lineone.net> wrote:
Hello

I worked in a place that gave me access to budget, non memory 20MHz CRT
scopes - I no longer work there. They were perfect for my needs.

Six years on and I find I need an oscilloscope, the market seems to have
changed. Are those cheap digital models any good?

I need reasonable Y sensitivity (5mV/div), up to 5MHz, storage would be
nice, it's not for radio work.

I found things like this...

http://www.rapidonline.com/Tools-Equipment/Uni-T-UTD2000-series-2-Cha...

Decent for the money? Or to be avoided?

John

My regular scope is a Rigol DS1052E. It's great. The going price is
around $340.

I'd never go back to an analog scope or a VTVM.

John- Hide quoted text -

- Show quoted text -

I like my Rigol, but to be honest I use the cheap TEK (1001B?) more
often.

I've got an old analog TEK that I'd like to bring back to life!
Not great speed, but it's got a 1mV/div input range that I used.

DSO's mostly suck at low sensitivity.... JL build's his own input
stages, I assume.

George H.

 

[George Herold]

On Dec 12, 4:14 pm, "Phil Allison" <phi...@tpg.com.au> wrote:

"eatmorepies"



I worked in a place that gave me access to budget, non memory 20MHz CRT
scopes - I no longer work there. They were perfect for my needs.

Six years on and I find I need an oscilloscope, the market seems to have
changed. Are those cheap digital models any good?

 ** Not so good for service work, particularly audio service.

     If you like using analogue scopes, stick with one.

     Analogue scopes are easy to use and tell you no lies.

     The opposite is true for digital ones.

...  Phil

Yeah but an analog 'scope can't average.
Put that together with the digital filters on the front end of the
Rigol
and it's a pretty nice tool for finding signals.

George H.

 

[George Herold]

On Dec 12, 10:42 pm, "Phil Allison" <phi...@tpg.com.au> wrote:

"George Herold"

Yeah but an analog 'scope can't average.

** So fucking what ?

I'll post some 'scope shots tomorrow.
Averaging is very useful, for all sorts of things.
Average 256 signals and if you trigger it right your noise goes down
by
a factor of 16! You can see all sorts of 'little crap' that way.

Put that together with the digital filters on the front end of the
Rigol

** Shame there are no analogue ones.

Oh I agree, But the cost would be out of control. I haven't looked
closely at the
Rigol's digital filters, there may be some flaws. You just need to
know the limits of your tools.

Shame how the scope keeps showing things that are not at the input - like
aliasing products, noise and signals that have stopped seconds ago.

These are fatal flaws in audio servicing.

Oh DSO's aren't for every task. For what I do it's useful.

George H.

...  Phil

 

[George Herold]

On Dec 12, 11:01 pm, Phil Hobbs
<pcdhSpamMeSensel...@electrooptical.net> wrote:

On 12/12/2011 10:27 PM, George Herold wrote:





On Dec 12, 5:41 pm, John Larkin
jjlar...@highNOTlandTHIStechnologyPART.com>  wrote:
On Mon, 12 Dec 2011 18:32:21 -0000, "eatmorepies"

jckip...@lineone.net>  wrote:
Hello

I worked in a place that gave me access to budget, non memory 20MHz CRT
scopes - I no longer work there. They were perfect for my needs.

Six years on and I find I need an oscilloscope, the market seems to have
changed. Are those cheap digital models any good?

I need reasonable Y sensitivity (5mV/div), up to 5MHz, storage would be
nice, it's not for radio work.

I found things like this...

http://www.rapidonline.com/Tools-Equipment/Uni-T-UTD2000-series-2-Cha....

Decent for the money? Or to be avoided?

John

My regular scope is a Rigol DS1052E. It's great. The going price is
around $340.

I'd never go back to an analog scope or a VTVM.

John- Hide quoted text -

- Show quoted text -

I like my Rigol, but to be honest I use the cheap TEK (1001B?) more
often.

I've got an old analog TEK that I'd like to bring back to life!
Not great speed, but it's got a 1mV/div input range that I used.

DSO's mostly suck at low sensitivity.... JL build's his own input
stages, I assume.

George H.

My TDS744A has a 1 mV/div range, which is still useful at 500 MHz BW.
Cost about two low-end Rigols' worth.

Cheers

Phil Hobbs

--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC
Optics, Electro-optics, Photonics, Analog Electronics

160 North State Road #203
Briarcliff Manor NY 10510
845-480-2058

hobbs at electrooptical dot nethttp://electrooptical.net- Hide quoted text -

- Show quoted text -

Ahh, OK, then most cheap DSo's stink at low sensitivity.

How much for a new one?

George H.

 

[George Herold]

On Dec 12, 11:08 pm, "Phil Allison" <phi...@tpg.com.au> wrote:

"George Herold"

Yeah but an analog 'scope can't average.

** So fucking what ?

I'll post some 'scope shots tomorrow.

**  FFS dickwad  -   I own a bloody Rigol  !!!

Put that together with the digital filters on the front end of the
Rigol

** Shame there are no analogue ones.

Oh I agree, But the cost would be out of control.

**  Not to mention the scope would then finally,y actually have
INTENTIONALLY varying bandwidth with sweep setting.

This is the biggest LIE about DSOs and why analogue scopes are SOOOOO much
better for troubleshooting analogue circuits.

Shame how the scope keeps showing things that are not at the input - like
aliasing products, noise and signals that have stopped seconds ago.

These are fatal flaws in audio servicing.

Oh DSO's aren't for every task.

** FFS read the bloody CONTEXT !!

   Here it is again  -  you RETARDED  BIRD  BRAIN !!

"  I need reasonable Y sensitivity (5mV/div), up to 5MHz, storage would be
nice, it's not for radio work.

** Not so good for service work, particularly audio service.

   If you like using analogue scopes, stick with one.

   Analogue scopes are easy to use and tell you no lies.

   The opposite is true for digital ones."

...  Phil

OK sorry, As Phil point's out I've forgotten the start of this
thread.

George H.

 

[Bob Masta]

On Mon, 12 Dec 2011 18:32:21 -0000, "eatmorepies"
<jckipper@lineone.net> wrote:

Hello

I worked in a place that gave me access to budget, non memory 20MHz CRT
scopes - I no longer work there. They were perfect for my needs.

Six years on and I find I need an oscilloscope, the market seems to have
changed. Are those cheap digital models any good?

I need reasonable Y sensitivity (5mV/div), up to 5MHz, storage would be
nice, it's not for radio work.

<Shameless plug>
How about a cheap analog scope, supplemented by a
ridiculously-cheap (US$29) Windows sound card scope for
audio work?

Sound cards don't do DC (without mods or external help), but
the "audio" range keeps creeping up... these days you can
get to nearly 96 kHz (192 kHz sample rates) even on cheap
built-in sound chipsets.

With the proper software (hint, hint!) you can get fancy
triggering, including negative trigger delay, hysteresis,
hold-off, etc. You can get real-time FFT spectrum analysis
(with optional peak tracking), and color spectrograms.

Synchronous waveform averaging allows stupendous noise
reduction... you can easily extract signals that were
totally buried in noise. See for example:
<http://www.daqarta.com/dw_wavg.htm>

Best of all, you get a signal generator that can create
almost any signal you want, with modulation including AM,
FM, PM, Burst, and Sweep on up to 4 independent streams per
stereo output channel. It can drive all your tests, and
provide the sync for the averaging as well. See:
<http://www.daqarta.com/dw_gen,htm>

(Actually, the generator is free. Even if you stick with
only an analog scope, or a cheap DSO, you will find plenty
of uses for the signal generator.)

Lots of other features, like a frequency counter that can
read low frequencies quickly with high precision (due to
reciprocal period methods). True RMS measurements. Sound
level (SPL) meter (if you have a calibrated microphone).
Histograms, including post-stimulus time histograms.

The $99 Pro version allows you to write macros to run
automated test sequences, allows custom spectrum response
limits for pass/fail production testing, and supports remote
control from custom software.

Best regards,


Bob Masta

DAQARTA v6.02
Data AcQuisition And Real-Time Analysis
www.daqarta.com
Scope, Spectrum, Spectrogram, Sound Level Meter
Frequency Counter, FREE Signal Generator
Pitch Track, Pitch-to-MIDI
Science with your sound card!

 

[John Larkin]

On Mon, 12 Dec 2011 19:27:22 -0800 (PST), George Herold
<gherold@teachspin.com> wrote:

On Dec 12, 5:41 pm, John Larkin
jjlar...@highNOTlandTHIStechnologyPART.com> wrote:
On Mon, 12 Dec 2011 18:32:21 -0000, "eatmorepies"





jckip...@lineone.net> wrote:
Hello

I worked in a place that gave me access to budget, non memory 20MHz CRT
scopes - I no longer work there. They were perfect for my needs.

Six years on and I find I need an oscilloscope, the market seems to have
changed. Are those cheap digital models any good?

I need reasonable Y sensitivity (5mV/div), up to 5MHz, storage would be
nice, it's not for radio work.

I found things like this...

http://www.rapidonline.com/Tools-Equipment/Uni-T-UTD2000-series-2-Cha...

Decent for the money? Or to be avoided?

John

My regular scope is a Rigol DS1052E. It's great. The going price is
around $340.

I'd never go back to an analog scope or a VTVM.

John- Hide quoted text -

- Show quoted text -

I like my Rigol, but to be honest I use the cheap TEK (1001B?) more
often.

I've got an old analog TEK that I'd like to bring back to life!
Not great speed, but it's got a 1mV/div input range that I used.

DSO's mostly suck at low sensitivity.... JL build's his own input
stages, I assume.

George H.

I have an old Tek AM502 diffamp I use to front-end a digital scope. It
has switchable hi/lo cutoff frequency, lots of offset range, and tons
of CMRR. Gain goes up to 100K.

http://www.bellnw.com/products/5292/index.htm

I think there are some smaller boxes like this around. Somebody
(here?) should make an affordable one; it wouldn't be hard, and the
Tek specs could be improved with modern parts.

John

 

[Fred Abse]

On Tue, 13 Dec 2011 17:54:13 -0800, John Larkin wrote:

I have an old Tek AM502 diffamp I use to front-end a digital scope. It
has switchable hi/lo cutoff frequency, lots of offset range, and tons
of CMRR. Gain goes up to 100K.

I have one of these. Only problem is the 1MHz B/W. Has been useful.though.

--
"For a successful technology, reality must take precedence
over public relations, for nature cannot be fooled."
(Richard Feynman)

 

[Fred Abse]

On Mon, 12 Dec 2011 14:41:29 -0800, John Larkin wrote:

I'd never go back to an analog scope or a VTVM.

I know it isn't tubes, but whaddabout your 610C?

--
"For a successful technology, reality must take precedence
over public relations, for nature cannot be fooled."
(Richard Feynman)

 

[George Herold]

On Dec 13, 8:54 pm, John Larkin
<jjlar...@highNOTlandTHIStechnologyPART.com> wrote:

On Mon, 12 Dec 2011 19:27:22 -0800 (PST), George Herold





gher...@teachspin.com> wrote:
On Dec 12, 5:41 pm, John Larkin
jjlar...@highNOTlandTHIStechnologyPART.com> wrote:
On Mon, 12 Dec 2011 18:32:21 -0000, "eatmorepies"

jckip...@lineone.net> wrote:
Hello

I worked in a place that gave me access to budget, non memory 20MHz CRT
scopes - I no longer work there. They were perfect for my needs.

Six years on and I find I need an oscilloscope, the market seems to have
changed. Are those cheap digital models any good?

I need reasonable Y sensitivity (5mV/div), up to 5MHz, storage would be
nice, it's not for radio work.

I found things like this...

http://www.rapidonline.com/Tools-Equipment/Uni-T-UTD2000-series-2-Cha....

Decent for the money? Or to be avoided?

John

My regular scope is a Rigol DS1052E. It's great. The going price is
around $340.

I'd never go back to an analog scope or a VTVM.

John- Hide quoted text -

- Show quoted text -

I like my Rigol, but to be honest I use the cheap TEK (1001B?) more
often.

I've got an old analog TEK that I'd like to bring back to life!
Not great speed, but it's got a 1mV/div input range that I used.

DSO's mostly suck at low sensitivity.... JL build's his own input
stages, I assume.

George H.

I have an old Tek AM502 diffamp I use to front-end a digital scope. It
has switchable hi/lo cutoff frequency, lots of offset range, and tons
of CMRR. Gain goes up to 100K.

http://www.bellnw.com/products/5292/index.htm

I think there are some smaller boxes like this around. Somebody
(here?) should make an affordable one; it wouldn't be hard, and the
Tek specs could be improved with modern parts.

John- Hide quoted text -

- Show quoted text -

That's nice, it'd be hard to beat the $500 price. (At least for me.)
100K gain in one box is not a small trick.
I made a DC to 2MHz amp out of opamps, but gain only to 10k.
At 100k gain, I had an oscillator.

George H.

 

[John Larkin]

On Wed, 14 Dec 2011 10:11:34 -0800 (PST), George Herold
<gherold@teachspin.com> wrote:

On Dec 13, 8:54 pm, John Larkin
jjlar...@highNOTlandTHIStechnologyPART.com> wrote:
On Mon, 12 Dec 2011 19:27:22 -0800 (PST), George Herold





gher...@teachspin.com> wrote:
On Dec 12, 5:41 pm, John Larkin
jjlar...@highNOTlandTHIStechnologyPART.com> wrote:
On Mon, 12 Dec 2011 18:32:21 -0000, "eatmorepies"

jckip...@lineone.net> wrote:
Hello

I worked in a place that gave me access to budget, non memory 20MHz CRT
scopes - I no longer work there. They were perfect for my needs.

Six years on and I find I need an oscilloscope, the market seems to have
changed. Are those cheap digital models any good?

I need reasonable Y sensitivity (5mV/div), up to 5MHz, storage would be
nice, it's not for radio work.

I found things like this...

http://www.rapidonline.com/Tools-Equipment/Uni-T-UTD2000-series-2-Cha...

Decent for the money? Or to be avoided?

John

My regular scope is a Rigol DS1052E. It's great. The going price is
around $340.

I'd never go back to an analog scope or a VTVM.

John- Hide quoted text -

- Show quoted text -

I like my Rigol, but to be honest I use the cheap TEK (1001B?) more
often.

I've got an old analog TEK that I'd like to bring back to life!
Not great speed, but it's got a 1mV/div input range that I used.

DSO's mostly suck at low sensitivity.... JL build's his own input
stages, I assume.

George H.

I have an old Tek AM502 diffamp I use to front-end a digital scope. It
has switchable hi/lo cutoff frequency, lots of offset range, and tons
of CMRR. Gain goes up to 100K.

http://www.bellnw.com/products/5292/index.htm

I think there are some smaller boxes like this around. Somebody
(here?) should make an affordable one; it wouldn't be hard, and the
Tek specs could be improved with modern parts.

John- Hide quoted text -

- Show quoted text -

That's nice, it'd be hard to beat the $500 price. (At least for me.)
100K gain in one box is not a small trick.
I made a DC to 2MHz amp out of opamps, but gain only to 10k.
At 100k gain, I had an oscillator.

George H.

This has gain of 100, 1 GHz bandwidth.

http://www.highlandtechnology.com/DSS/J750DS.shtml

I scribbled it out as a PCB layout training exercize, but it worked,
so we called it a product. We've sold a few.

We make another box that has one input and two outputs, one 10x gain
and one 1000x gain, 100 MHz BW, very clean clipping recovery. It's
used for looking at low-level junk on a laser pulse, stuff just before
and after the main flash.

On a multilayer board, in a box, this stuff usually works. The hard
part on the x1000 zoom amp was testing it. Ground loops and RF pickup
drove us whacko. We wound up using a battery-powered
optical-electrical converter connected right to the input and sending
the test signals optically.

John