Comparing different PC Buses

The main listing of Personal Computer Bus description is listed on the Personal Computer Buses page. In addition to providing links to almost all of the different styles of PC buses the page provided a table comparing each of the different types of interfaces and their transfer speeds.

I notice in one of the server reports that shows relative down loads vs. page size that the page was using up a lot of bandwidth relative to other pages.

So in order to save a little bandwidth the table was reduced in size by only showing the final version of the expansion bus. Previous versions of a given spec were removed from the table, reducing the size of the page.

Not wanting to lose any data, the complete table was moved to it's own page; Comparing PC Buses.

MIL-HDBK-217F Environments

Military Handbook 217 [MIL-HDBK-217]; Reliability Prediction of Electronic Equipment provides a means to calculate the reliability of systems based on the components used with in the system.

The definition for Mean Time Between Failure (MTBF) from MIL-HDBK-217F is located on the MTBF Definition page. The MTBF page contains its main link off the Engineering Dictionary page or Electronic acronyms page.

MIL-HDBK-217 provides for a number of Environments in which equipment may be operated in, the new pages added list the different types of Environments:

Ground Systems Environments,
Naval Systems Environments,
Airborne Systems Environments,
Space Systems Environments.

Each Environment definition contains a number of sub-Environments, with each page describing the terms and definition. A related page lists Military Specifications.

404 Page Not Found

I just came across a page that was never up-loaded, so it returned a 404 code when I checked the status. The page cover Mezzanine Board sizes and appears to be an extension of the listing for Industrial Board Formats page. How ever I can't find which page links to it, so now that it's been up-loaded it's a orphan page. An orphan page is a page that has no other pages with in the same site that point to it.

That missing page would never show up in any of the site stats or reports because the page was never uploaded and had no other pages that point to it.

New Component Manufacturers Pages

Added two new pages tonight to enhance the web site.

The first page covers Terminal Block Manufacturers. A listing that had resided on the main Connector Manufacturers page. The connector page was kind of large, and the section for Terminal strips listed to many vendors. So I reduce the page size, with the link to the new page, but I provide a more direct route to Terminal Strip companies. I did list a small definition for Terminal strips but the main section on Glossary of Terms should always be checked.

The second new page covers Error Correction IC Manufacturers. Same as before, the original Specialized Logic ICs was sort of large, so I moved the listing off to another page. The new page contains the same listing as the original page, with a few new acronyms.

PXI Signal assignments

I separated the pinout data for the P2 connector on the PXI interface bus. I left the PXI System Slot pinout on its current page address, but I moved the Peripheral Slot pinout onto a new page. The move was made to reduce the page size, so instead of one 30k byte page, I now have two 15k byte pages. Only helps if a person needs one of the other pinout tables, but not both. I updated the PXI P1 pinout table 'page' by adding a new Google search bar. Of course on the main page that provides a description of the PXI bus, I added the new link to P2 Peripheral slot signal assignments.

Along the same lines as some of the previous posts to reduce server bandwidth I up-dated a few other pages. In both cases I deleted some html font tags embedded with in the pin-out tables to reduce the page size. The obsolete IBM Personal Computer bus, Micro Channel Architecture, and the obsolete EISA bus.

Each page received a few hundred page views last month. Reduced now by a few k-bytes, or 500k bytes per month. I'm suppressed those two pages were getting that many hits, but deleting the font tags are transparent ~ you can't tell a change was made.

Oh, PXI means cPCI for Instrumentation.