A friend of mine (one who has been enormously helpful to me in the past)
needs to borrow an oscilloscope. It's to set up some complex thing; the
heads on some sort of video equipment I think. TBH I couldn't follow his
technobabble. Is there anyone not too far from Doncaster/Rotherham who
could lend him one? I'd do the running about.

Bill

On Thu, 20 May 2021 13:41:20 +0100, williamwright
wrote:


A friend of mine (one who has been enormously helpful to me in the past)
needs to borrow an oscilloscope. It's to set up some complex thing; the
heads on some sort of video equipment I think. TBH I couldn't follow his
technobabble. Is there anyone not too far from Doncaster/Rotherham who
could lend him one? I'd do the running about.

Bill


I wonder if he could use Audacity, which goes up to 20kHz?
--
Dave W

On 20/05/2021 15:58, Dave W wrote:
On Thu, 20 May 2021 13:41:20 +0100, williamwright
wrote:

A friend of mine (one who has been enormously helpful to me in the past)
needs to borrow an oscilloscope. It's to set up some complex thing; the
heads on some sort of video equipment I think. TBH I couldn't follow his
technobabble. Is there anyone not too far from Doncaster/Rotherham who
could lend him one? I'd do the running about.

Bill

I wonder if he could use Audacity, which goes up to 20kHz?


thats a point as it sounds like the friend wants to check/adjust the
switching points on the helical scannning heads.....

As an aside, who still uses a VHS recorder?

S.

I think if its video heads it has to be real time. One has to adjust the
system so the bit with the video is at the point where the rotating heads
are actually on the tape. I used to do the old Philips ones and if you were
not careful, a new head assembly could end up with the tracking up one end
to avoid a noise bar, or sync jumping.
I did try to set up a Toshiba 7 head btamax once, never ever again. five
hands and two scopes at least I reckon, even then if you jolt the machine
in transit its all to cock again. bah humbug.
Brian

--

This newsgroup posting comes to you directly from...
The Sofa of Brian Gaff...

Blind user, so no pictures please
Note this Signature is meaningless.!
"Dave W" wrote in message
...
On Thu, 20 May 2021 13:41:20 +0100, williamwright
wrote:

A friend of mine (one who has been enormously helpful to me in the past)
needs to borrow an oscilloscope. It's to set up some complex thing; the
heads on some sort of video equipment I think. TBH I couldn't follow his
technobabble. Is there anyone not too far from Doncaster/Rotherham who
could lend him one? I'd do the running about.

Bill

I wonder if he could use Audacity, which goes up to 20kHz?
--
Dave W

On 20/05/2021 13:41, williamwright wrote:
A friend of mine (one who has been enormously helpful to me in the past)
needs to borrow an oscilloscope. It's to set up some complex thing; the
heads on some sort of video equipment I think. TBH I couldn't follow his
technobabble. Is there anyone not too far from Doncaster/Rotherham who
could lend him one? I'd do the running about.

Depending on the bandwidth he needs you might get away with Daquarta or
one of the other software scopes that uses the sound card for input.

https://www.daqarta.com/dw_scope.htm

I suspect it might not be fast enough for what he wants but you can try
before you buy and continue to use it as a signal generator afterwards.

It is quite handy for popular science lectures on music and sounds.

--
Regards,
Martin Brown

williamwright wrote:
A friend of mine (one who has been enormously helpful to me in the past)
needs to borrow an oscilloscope. It's to set up some complex thing; the
heads on some sort of video equipment I think. TBH I couldn't follow his
technobabble. Is there anyone not too far from Doncaster/Rotherham who
could lend him one? I'd do the running about.

Bill

Would that be dealing with a 6MHz baseband signal ?

http://www.industrial-electronics.co...-Elec_14c.html

https://tv-handbook.com/Basic%20Video.html

That's well outside a bodge based on a sound card :-)

You've got Nyquists sampling theorem and needing to have
a bit more speed to do a good job. Plus, for video work,
there are probably some "canonical views" that an expert
would appreciate seeing. Not just any old lousy oscilloscope
trigger.

Are there still TV repair shops ? Or are they gone gone gone ?
Maybe someone in such a shop, knows how to adjust the
head on a player.

Paul

After serious thinking williamwright wrote :
A friend of mine (one who has been enormously helpful to me in the past)
needs to borrow an oscilloscope. It's to set up some complex thing; the heads
on some sort of video equipment I think. TBH I couldn't follow his
technobabble. Is there anyone not too far from Doncaster/Rotherham who could
lend him one? I'd do the running about.

One here if you are stuck Bill - double beam 20Mhz.

If its tracking and head position then its relatively easy with a bog
standard scope in them old days of the N1700, we shall not speak of a multi
head Toshiba Betamax.
Brian

--

This newsgroup posting comes to you directly from...
The Sofa of Brian Gaff...

Blind user, so no pictures please
Note this Signature is meaningless.!
Harry Bloomfield; "Esq." wrote in message
...
After serious thinking williamwright wrote :
A friend of mine (one who has been enormously helpful to me in the past)
needs to borrow an oscilloscope. It's to set up some complex thing; the
heads on some sort of video equipment I think. TBH I couldn't follow his
technobabble. Is there anyone not too far from Doncaster/Rotherham who
could lend him one? I'd do the running about.

One here if you are stuck Bill - double beam 20Mhz.

On Fri, 21 May 2021 08:32:52 +0100, Brian Gaff \(Sofa\) wrote:

If its tracking and head position then its relatively easy with a bog
standard scope in them old days of the N1700, we shall not speak of a
multi head Toshiba Betamax.
Brian

Or a Cossor 1049 in my day.

On 20/05/2021 16:48, Harry Bloomfield wrote:
After serious thinking williamwright wrote :
A friend of mine (one who has been enormously helpful to me in the
past) needs to borrow an oscilloscope. It's to set up some complex
thing; the heads on some sort of video equipment I think. TBH I
couldn't follow his technobabble. Is there anyone not too far from
Doncaster/Rotherham who could lend him one? I'd do the running about.

One here if you are stuck Bill - double beam 20Mhz.

Cheers! There's a possibility that I might have got a borrow from a chap
just down the road, but if it falls through I'll be in touch.

Bill

williamwright pretended :
Cheers! There's a possibility that I might have got a borrow from a chap just
down the road, but if it falls through I'll be in touch.

No Problem, you know where I am, just up north of you.

On 20/05/2021 13:41, williamwright wrote:
A friend of mine (one who has been enormously helpful to me in the past)
needs to borrow an oscilloscope. It's to set up some complex thing; the
heads on some sort of video equipment I think. TBH I couldn't follow his
technobabble. Is there anyone not too far from Doncaster/Rotherham who
could lend him one? I'd do the running about.

There are some affordable USB and held held scopes on eBay that are
circa £40.

From China:
https://www.ebay.co.uk/itm/194086039667

They might be worth a look for those times when it's useful.

On Thu, 20 May 2021 13:41:20 +0100, williamwright wrote:

A friend of mine (one who has been enormously helpful to me in the past)
needs to borrow an oscilloscope. It's to set up some complex thing; the
heads on some sort of video equipment I think. TBH I couldn't follow his
technobabble. Is there anyone not too far from Doncaster/Rotherham who
could lend him one? I'd do the running about.

Bill

If your friend is doing this sort of work on a regular or even just a
semi-regular basis, he might be better off investing a little of his hard
earned into a modern DSO that provides a comprehensive range of video
triggering options.

Modern 'entry level' Digital Storage Oscilloscopes (DSOs) are quite
cheap by the standards of the 2nd hand dual beam 50 and 70MHz BW
Tektronix 'Boat Anchor' oscilloscopes that were typically on sale at
prices I couldn't afford (over a hundred quid when that was 'real money')
at amateur radio mobile rallies circa 35 years ago.

You can now buy a brand new dual channel 200MHz BW Siglent SDS1202X-E
for a mere 360 quid (including free delivery) from two of the three
official UK Siglent agents (Telonic Instruments being one and Labtronics
the other - the less said about the third, the better).

I paid Labtronics 365 quid for mine just over two and a half years ago
(a year's worth of a pound a day savings - cheap enough that most ten
year olds could probably save the price of the 'scope in less than a
year's worth of their pocket money allowance).

I mention this model since it offers a comprehensive range of video
triggering options he might find very useful to his current task. He can
download the specification datasheet and the user manual pdf files to
check out this DSO model for himself.

Siglent provides access to all of their datasheets and user guides for
their entire range of test and measurement kit for anyone interested to
download as pdf files.

Another nice thing about modern oscilloscopes (DSOs) is their vastly
reduced bulk and weight compared to the boat anchors of yesteryear. That
SDS1202X-E model for example only weighs in at a mere 2.6Kg with
dimensions specified in mm as 312L, 132.6W and 151H where W is front to
back depth and L is the front panel width.

No longer do you need to decide where to semi-permanently locate most
modern day T&M kit in your workshop as was once the case with those
ancient, if venerable, boat anchors.

It's quite possible that such considerations as to where to make room
for such kit may well explain why he doesn't already possess a DSO of his
own if he hasn't kept in touch with all the recent developments in T&M
kit over the past decade or so.

--
Johnny B Good

On 22/05/2021 03:37, Johnny B Good wrote:
On Thu, 20 May 2021 13:41:20 +0100, williamwright wrote:

A friend of mine (one who has been enormously helpful to me in the past)
needs to borrow an oscilloscope. It's to set up some complex thing; the
heads on some sort of video equipment I think. TBH I couldn't follow his
technobabble. Is there anyone not too far from Doncaster/Rotherham who
could lend him one? I'd do the running about.

Bill

If your friend is doing this sort of work on a regular or even just a
semi-regular basis, he might be better off investing a little of his hard
earned into a modern DSO that provides a comprehensive range of video
triggering options.

Modern 'entry level' Digital Storage Oscilloscopes (DSOs) are quite
cheap by the standards of the 2nd hand dual beam 50 and 70MHz BW
Tektronix 'Boat Anchor' oscilloscopes that were typically on sale at
prices I couldn't afford (over a hundred quid when that was 'real money')
at amateur radio mobile rallies circa 35 years ago.

You can now buy a brand new dual channel 200MHz BW Siglent SDS1202X-E
for a mere 360 quid (including free delivery) from two of the three
official UK Siglent agents (Telonic Instruments being one and Labtronics
the other - the less said about the third, the better).

I paid Labtronics 365 quid for mine just over two and a half years ago
(a year's worth of a pound a day savings - cheap enough that most ten
year olds could probably save the price of the 'scope in less than a
year's worth of their pocket money allowance).

I mention this model since it offers a comprehensive range of video
triggering options he might find very useful to his current task. He can
download the specification datasheet and the user manual pdf files to
check out this DSO model for himself.

Siglent provides access to all of their datasheets and user guides for
their entire range of test and measurement kit for anyone interested to
download as pdf files.

Another nice thing about modern oscilloscopes (DSOs) is their vastly
reduced bulk and weight compared to the boat anchors of yesteryear. That
SDS1202X-E model for example only weighs in at a mere 2.6Kg with
dimensions specified in mm as 312L, 132.6W and 151H where W is front to
back depth and L is the front panel width.

No longer do you need to decide where to semi-permanently locate most
modern day T&M kit in your workshop as was once the case with those
ancient, if venerable, boat anchors.

It's quite possible that such considerations as to where to make room
for such kit may well explain why he doesn't already possess a DSO of his
own if he hasn't kept in touch with all the recent developments in T&M
kit over the past decade or so.


Interesting post. Thank you.

Bill

williamwright wrote:
On 22/05/2021 03:37, Johnny B Good wrote:
On Thu, 20 May 2021 13:41:20 +0100, williamwright wrote:

A friend of mine (one who has been enormously helpful to me in the past)
needs to borrow an oscilloscope. It's to set up some complex thing; the
heads on some sort of video equipment I think. TBH I couldn't follow his
technobabble. Is there anyone not too far from Doncaster/Rotherham who
could lend him one? I'd do the running about.

Bill

If your friend is doing this sort of work on a regular or even just a
semi-regular basis, he might be better off investing a little of his hard
earned into a modern DSO that provides a comprehensive range of video
triggering options.

Modern 'entry level' Digital Storage Oscilloscopes (DSOs) are quite
cheap by the standards of the 2nd hand dual beam 50 and 70MHz BW
Tektronix 'Boat Anchor' oscilloscopes that were typically on sale at
prices I couldn't afford (over a hundred quid when that was 'real money')
at amateur radio mobile rallies circa 35 years ago.

You can now buy a brand new dual channel 200MHz BW Siglent SDS1202X-E
for a mere 360 quid (including free delivery) from two of the three
official UK Siglent agents (Telonic Instruments being one and Labtronics
the other - the less said about the third, the better).

I paid Labtronics 365 quid for mine just over two and a half years ago
(a year's worth of a pound a day savings - cheap enough that most ten
year olds could probably save the price of the 'scope in less than a
year's worth of their pocket money allowance).

I mention this model since it offers a comprehensive range of video
triggering options he might find very useful to his current task. He can
download the specification datasheet and the user manual pdf files to
check out this DSO model for himself.

Siglent provides access to all of their datasheets and user guides for
their entire range of test and measurement kit for anyone interested to
download as pdf files.

Another nice thing about modern oscilloscopes (DSOs) is their vastly
reduced bulk and weight compared to the boat anchors of yesteryear. That
SDS1202X-E model for example only weighs in at a mere 2.6Kg with
dimensions specified in mm as 312L, 132.6W and 151H where W is front to
back depth and L is the front panel width.

No longer do you need to decide where to semi-permanently locate most
modern day T&M kit in your workshop as was once the case with those
ancient, if venerable, boat anchors.

It's quite possible that such considerations as to where to make room
for such kit may well explain why he doesn't already possess a DSO of his
own if he hasn't kept in touch with all the recent developments in T&M
kit over the past decade or so.


Interesting post. Thank you.

Bill


Id agree with the above. Have a look on Farnell.co.uk for oscilloscope and
sort for increasing price. Theres a whole bunch of pretty cheap devices
these days. Digital scopes got a bad reputation in the early days, as they
didnt sample fast enough and often told you lies when looking at modulated
rf waveforms. These days that is largely behind us.

On Sat 22/05/2021 07:12, Tweed wrote:
williamwright wrote:
On 22/05/2021 03:37, Johnny B Good wrote:
On Thu, 20 May 2021 13:41:20 +0100, williamwright wrote:

A friend of mine (one who has been enormously helpful to me in the past)
needs to borrow an oscilloscope. It's to set up some complex thing; the
heads on some sort of video equipment I think. TBH I couldn't follow his
technobabble. Is there anyone not too far from Doncaster/Rotherham who
could lend him one? I'd do the running about.

Bill

If your friend is doing this sort of work on a regular or even just a
semi-regular basis, he might be better off investing a little of his hard
earned into a modern DSO that provides a comprehensive range of video
triggering options.

Modern 'entry level' Digital Storage Oscilloscopes (DSOs) are quite
cheap by the standards of the 2nd hand dual beam 50 and 70MHz BW
Tektronix 'Boat Anchor' oscilloscopes that were typically on sale at
prices I couldn't afford (over a hundred quid when that was 'real money')
at amateur radio mobile rallies circa 35 years ago.

You can now buy a brand new dual channel 200MHz BW Siglent SDS1202X-E
for a mere 360 quid (including free delivery) from two of the three
official UK Siglent agents (Telonic Instruments being one and Labtronics
the other - the less said about the third, the better).

I paid Labtronics 365 quid for mine just over two and a half years ago
(a year's worth of a pound a day savings - cheap enough that most ten
year olds could probably save the price of the 'scope in less than a
year's worth of their pocket money allowance).

I mention this model since it offers a comprehensive range of video
triggering options he might find very useful to his current task. He can
download the specification datasheet and the user manual pdf files to
check out this DSO model for himself.

Siglent provides access to all of their datasheets and user guides for
their entire range of test and measurement kit for anyone interested to
download as pdf files.

Another nice thing about modern oscilloscopes (DSOs) is their vastly
reduced bulk and weight compared to the boat anchors of yesteryear. That
SDS1202X-E model for example only weighs in at a mere 2.6Kg with
dimensions specified in mm as 312L, 132.6W and 151H where W is front to
back depth and L is the front panel width.

No longer do you need to decide where to semi-permanently locate most
modern day T&M kit in your workshop as was once the case with those
ancient, if venerable, boat anchors.

It's quite possible that such considerations as to where to make room
for such kit may well explain why he doesn't already possess a DSO of his
own if he hasn't kept in touch with all the recent developments in T&M
kit over the past decade or so.


Interesting post. Thank you.

Bill


Id agree with the above. Have a look on Farnell.co.uk for oscilloscope and
sort for increasing price. Theres a whole bunch of pretty cheap devices
these days. Digital scopes got a bad reputation in the early days, as they
didnt sample fast enough and often told you lies when looking at modulated
rf waveforms. These days that is largely behind us.


The Siglent stuff looks very competitive compared with my Gould OS4020!!

As an offshoot, does anyone know of a comparable/competitively priced
500MHz frequency counter?

On Sat, 22 May 2021 02:37:39 +0000, Johnny B Good wrote:

You can now buy a brand new dual channel 200MHz BW Siglent SDS1202X-E
for a mere 360 quid (including free delivery) from two of the three
official UK Siglent agents

I have one, and am very pleased with it.

I bought it last year, direct from siglent.eu. Ordered at lunchtime, and
here the next day, from the Netherlands (yes, I paid for fast delivery).

I bought some other Siglent gear, too. I wanted to get it all before
Brexit kicked in.

--
My posts are my copyright and if @diy_forums or Home Owners' Hub
wish to copy them they can pay me £1 a message.
Use the BIG mirror service in the UK: http://www.mirrorservice.org
*lightning surge protection* - a w_tom conductor

On Sat, 22 May 2021 10:36:50 +0000, Bob Eager wrote:

On Sat, 22 May 2021 02:37:39 +0000, Johnny B Good wrote:

You can now buy a brand new dual channel 200MHz BW Siglent SDS1202X-E
for a mere 360 quid (including free delivery) from two of the three
official UK Siglent agents

I have one, and am very pleased with it.

I bought it last year, direct from siglent.eu. Ordered at lunchtime, and
here the next day, from the Netherlands (yes, I paid for fast delivery).

I bought some other Siglent gear, too. I wanted to get it all before
Brexit kicked in.

Presumably you were able to make a significant saving compared to
ordering from a UK official Siglent agent.

I chose Labtronix on the basis that they were a long established company
based in the UK and bound by SOGA and the free delivery on orders worth
more than 70 or 75 quid took only 3 business working days.

Much later (last year), I chose Telonic Instruments for the same reasons
(plus I'd lucked out on getting a generous discount) when I upgraded to
an SDS2104X Plus (now hacked to a 2504 with all the trimmings). I don't
think I've had to wait more than week tops for delivery with either of
these establishments.

I've kept hold of the 1202 since it's still a very useful 'scope for the
bulk of my hobby activities. It's more compact and lighter in weight and
boots up in only a third of the time taken by the 2504 which makes the
1202 look like a toy by comparison.

Also, it only consumes 22W versus the 54W consumed by the 2504. The
wider bandwidth, additional two channels, features and a lower noise
floor front end all come at a cost.

The fourfold upfront purchase cost isn't the only one to consider,
there's also the energy consumption cost as well although that's unlikely
to add much more than a fiver to the annual electricity bill even if I
didn't have the 1202 to fall back upon for all but the most demanding of
tasks.

Whilst I had been expecting to see an increased energy consumption
somewhere in the region of 15 to 20 watts, that 32 watt increase had
rather taken me by surprise.

I wouldn't mind so much if the boot up time had been only a little more
protracted than the 1202's 16 seconds but the 2504 takes a full 46
seconds! That's longer than my desktop PC takes which also boots a Linux
OS (admittedly,from a 250GB SSD rather than flash ram).

I can only surmise that the doubled up channel count and the larger
feature set has increased the boot up burden somewhat probably involving
timing constraints that can't be mitigated by simply throwing more
processing power at the task. Hey ho, the price of progress I guess?

--
Johnny B Good