Ok, it's the old PCMCIA but it will be only a small step to swing that to
USB if the market is there.

"Joerg" <notthisjoergsch at (no spam) removethispacbell.net> wrote in message
news:uGe3k.7327$mh5.5226 at (no spam) nlpi067.nbdc.sbc.com...
Ok, it's the old PCMCIA but it will be only a small step to swing that to
USB if the market is there.

Not bad... I wonder what the cost is?

I'm about to lug a spectrum analyzer over to our annex... you're up for
providing design advice on that USB-based version, right? :-)

Hello Folks,

A while ago some of us were pondering a light-weight TDR that is small
and can be hooked up to USB. Well, in the last issue of the
"IEEE-Institute" one was presented and it's from this company:

http://www.ecadusa.com/tdr3127.htm

Ok, it's the old PCMCIA but it will be only a small step to swing that
to USB if the market is there.

--
Regards, Joerg

http://www.analogconsultants.com/

"gmail" domain blocked because of excessive spam.
Use another domain or send PM.

IIRC the programming part required about 20 minutes.

Joerg wrote:
Hello Folks,

A while ago some of us were pondering a light-weight TDR that is small
and can be hooked up to USB. Well, in the last issue of the
"IEEE-Institute" one was presented and it's from this company:

http://www.ecadusa.com/tdr3127.htm

Ok, it's the old PCMCIA but it will be only a small step to swing that
to USB if the market is there.

--
Regards, Joerg

http://www.analogconsultants.com/

"gmail" domain blocked because of excessive spam.
Use another domain or send PM.

I wonder about the output drive requirements for some applications given
the PCMCIA card's power supply limitations. With a USB device, you could
incorporate an (optional) external power supply.

Hello Folks,

A while ago some of us were pondering a light-weight TDR that is small
and can be hooked up to USB. Well, in the last issue of the
"IEEE-Institute" one was presented and it's from this company:

http://www.ecadusa.com/tdr3127.htm

Ok, it's the old PCMCIA but it will be only a small step to swing that
to USB if the market is there.

On Mon, 09 Jun 2008 11:31:46 -0700, Joerg
notthisjoergsch at (no spam) removethispacbell.net> wrote:

Hello Folks,

A while ago some of us were pondering a light-weight TDR that is small
and can be hooked up to USB. Well, in the last issue of the
"IEEE-Institute" one was presented and it's from this company:

http://www.ecadusa.com/tdr3127.htm

Ok, it's the old PCMCIA but it will be only a small step to swing that
to USB if the market is there.

PCMCIA? How quaint.

They avoid specifying time resolution, and the 6.4 Gs/s sample rate is
fiction. The time step is 1 ns (typ?) but the actual measurement
resolution is unknown.

Looks OK for single-ended cables; way too slow for PC boards.

Hyperlabs makes a fast USB TDR, but it's expensive.

John Larkin wrote:
On Mon, 09 Jun 2008 11:31:46 -0700, Joerg
notthisjoergsch at (no spam) removethispacbell.net> wrote:

Hello Folks,

A while ago some of us were pondering a light-weight TDR that is small
and can be hooked up to USB. Well, in the last issue of the
"IEEE-Institute" one was presented and it's from this company:

http://www.ecadusa.com/tdr3127.htm

Ok, it's the old PCMCIA but it will be only a small step to swing that
to USB if the market is there.

PCMCIA? How quaint.


Surprisingly even my newest laptop still has one slot.

They avoid specifying time resolution, and the 6.4 Gs/s sample rate is
fiction. The time step is 1 ns (typ?) but the actual measurement
resolution is unknown.


It's probably the usual "equivalent time sampling" and they state one
inch resolution. That won't be good enough for a circuit board but their
market is cables.


Looks OK for single-ended cables; way too slow for PC boards.

Hyperlabs makes a fast USB TDR, but it's expensive.


No idea what theirs costs either.
Best regards,

On Mon, 09 Jun 2008 13:22:33 -0700, Joerg
notthisjoergsch at (no spam) removethispacbell.net> wrote:

John Larkin wrote:
On Mon, 09 Jun 2008 11:31:46 -0700, Joerg
notthisjoergsch at (no spam) removethispacbell.net> wrote:

Hello Folks,

A while ago some of us were pondering a light-weight TDR that is small
and can be hooked up to USB. Well, in the last issue of the
"IEEE-Institute" one was presented and it's from this company:

http://www.ecadusa.com/tdr3127.htm

Ok, it's the old PCMCIA but it will be only a small step to swing that
to USB if the market is there.
PCMCIA? How quaint.

Surprisingly even my newest laptop still has one slot.

You sure? Most have Express Card these days, IME, and they look almost
the same from the outside. They're supposed to be able to transfer
data much faster than PCMCIA/PC-card.

John Larkin wrote:
On Mon, 09 Jun 2008 11:31:46 -0700, Joerg
notthisjoergsch at (no spam) removethispacbell.net> wrote:

Hello Folks,

A while ago some of us were pondering a light-weight TDR that is small
and can be hooked up to USB. Well, in the last issue of the
"IEEE-Institute" one was presented and it's from this company:

http://www.ecadusa.com/tdr3127.htm

Ok, it's the old PCMCIA but it will be only a small step to swing that
to USB if the market is there.

PCMCIA? How quaint.


Surprisingly even my newest laptop still has one slot.


They avoid specifying time resolution, and the 6.4 Gs/s sample rate is
fiction. The time step is 1 ns (typ?) but the actual measurement
resolution is unknown.


It's probably the usual "equivalent time sampling" and they state one
inch resolution. That won't be good enough for a circuit board but their
market is cables.

On Mon, 09 Jun 2008 13:22:33 -0700, Joerg
notthisjoergsch at (no spam) removethispacbell.net> wrote:

John Larkin wrote:
On Mon, 09 Jun 2008 11:31:46 -0700, Joerg
notthisjoergsch at (no spam) removethispacbell.net> wrote:

Hello Folks,

A while ago some of us were pondering a light-weight TDR that is small
and can be hooked up to USB. Well, in the last issue of the
"IEEE-Institute" one was presented and it's from this company:

http://www.ecadusa.com/tdr3127.htm

Ok, it's the old PCMCIA but it will be only a small step to swing that
to USB if the market is there.
PCMCIA? How quaint.

Surprisingly even my newest laptop still has one slot.


They avoid specifying time resolution, and the 6.4 Gs/s sample rate is
fiction. The time step is 1 ns (typ?) but the actual measurement
resolution is unknown.

It's probably the usual "equivalent time sampling" and they state one
inch resolution. That won't be good enough for a circuit board but their
market is cables.

The 1" resolution isn't compatible with a 1 ns risetime step. These
people are confused.

It's a Twinhead Durabook and I purposely selected that one because it's
ruggedized and carries legacy ports such as RS232.

The 1" resolution isn't compatible with a 1 ns risetime step. These
people are confused.

"Joerg" <notthisjoergsch at (no spam) removethispacbell.net> wrote in message
news:Nah3k.6109$ZE5.4092 at (no spam) nlpi061.nbdc.sbc.com...

It's a Twinhead Durabook and I purposely selected that one because it's
ruggedized and carries legacy ports such as RS232.


I made a mistake and bought a "gaming" laptop towards the beginning of this
year. It is fast with a great graphics card, but doesn't have a docking
station nor an RS-232 port.

I replaced it with a used HP Compaq nw8440
(http://h18000.www1.hp.com/products/quickspecs/12449_div/12449_div.HTML) for
$600 via eBay. 2.16GHz CPU, 2GB RAM, 1920x1200 15.4" (!) display, docking
port, and RS-232. It's a beautiful thing to behold, I tell you -- especially
given the price! I had assumed that when HP acquired Compaq all their
"business" laptops would go away and therefore HP was only making cheesy
low-end laptops... nice to have been wrong there...

---Joel


Nice laptop, maybe I'll buy one as a back up.