Wow, I paid a lot less for my Tektronix TDS3054 5GS/sec with 4 amplified low
capacitance JFet probes & rechargeable battery pack & PC com interface. It cost me 2K
US dollars.
_____________
Brian Guralnick
----- Original Message -----
From: "Abd ul-Rahman Lomax" <[EMAIL PROTECTED]>
To: "Protel EDA Forum" <[EMAIL PROTECTED]>; "Protel EDA Forum"
<[EMAIL PROTECTED]>
Sent: Sunday, June 17, 2001 3:51 PM
Subject: Re: [PEDA] Cost of experimentation, was sugestions for improving Protel
| At 05:30 PM 6/17/01 +0100, Terry Harris wrote:
| >On Sun, 17 Jun 2001 00:40:17 -0700, you wrote:
| >
| > >No oscilloscope is as expensive as is my time, and this would be true for
| > >most PC designers.
| >
| >Damn you must be expensive, a 2G bandwidth scope with probes comes in at
| >around (guessing) $30k, what is a week's rental on that?
|
| First of all, they probably own the scope if they are designing in a region
| where what they are asking for is of concern. But if not, I'd think that an
| HP 54111D 2GS 500 MHZ scope might be sufficient. I found one available
| on-line for $3500 purchase, $350 rental (per month, I think). But a better
| scope might be, tops, $2000 per month. That's $500 per week. The scope
| usage could be scheduled for a time when the scope was already needed for
| something else (i.e., it could be rented for a little longer, or it might
| fill out a rental period, which means that it would add no cost at all.)
|
| Experimental work like I suggested does not have to be done on the kind of
| schedule needed for most design.
|
| The study could also be contracted out. I'd suggest that the time of a
| consultant in the field, who would have his or her own equipment,
| sufficient to give a report comparing two PCBs, might be less than $1000.
| And that is less than two days of my time.
|
| > But you forget the
| >time of the engineer to drive it, to know where and what he was looking at
| >- or are you more expensive than him also ?
|
| Yes, if he is an employee and I am a contractor. And his time might even be
| free, under some conditions. Anyway, I did not forget, I merely did not
| comment on that part of what Mr. Harris wrote. It was, of course, the most
| valid point he made.
|
|
| >I still suggest the time spent testing the proposition is not worth the
| >time of the layout guy carrying on the same way (unless the findings carry
| >over to many new designs) - there needs to be some production cost saving
| >also.
|
| The stated conditions were that the practice was routine for this company.
| That means to me "many new designs." As to production cost savings, I
| mentioned some possible significant savings, but that question gets more
| complex.
|
| However, I think that there are many of us who would like to know the
| results of experiments like what was suggested. I expect that we might be
| able to arrange donations of equipment and services if the results were to
| become public. It's even possible that a fabricator would donate the
| additional board, but if not, getting together the few hundred dollars
| necessary should not be difficult. (If the board is large, it will be more
| expensive, of course, and there is also the cost of stuffing the boards;
| but the company will end up with at least one functioning board and maybe two.)
|
| Hey, it's just an idea....
|
| [EMAIL PROTECTED]
| Abdulrahman Lomax
| P.O. Box 690
| El Verano, CA 95433
|
|
|
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