[IAEP] How can we consistantly evalutate CRT monitor quality?

[Sascha Silbe]

Excerpts from Caroline Meeks's message of Sun Oct 03 19:39:51 +0200 2010:

> Is there a way to have different people repeatably agree on how "good" a CRT
> monitor is?  Is there a quantitive measure that is reasonably easy to use?
> A test image that can somehow get repeatable results by different people?

I don't know about CRTs, but for printers certain test patterns used to
be "standard" (it's been a long time since I saw a printer product test,
so no idea what is common practice these days). A particular one that I
think might be good for CRT testing is a 1° radial lines pattern like
CUPS uses [1]. Be careful not to scale the image when displaying it on
the monitor.
The most common issue with old or low-quality CRTs is that they can be
unsharp which the radial lines test might help to discover. It probably
works best when comparing to a known-good monitor.

Take a peek at how Tom's Hardware evaluates monitors (e.g. [2]); maybe
you can adopt some of their tests. 

Power consumption is nicely quantitative and directly equates to power
bills. It's usually proportional to size and age (read: larger and
older CRTs draw lots of power and make for a nice electric heating).
Some models take much more power than comparable models (i.e. same
size+age) so it's useful to measure the consumption (don't trust the
rating plate!).
To give some numbers: An 80W CRT being used 5h a day consumes ~12kWh per
month. Assuming 15cent/kWh this means $1.83 per month just to power the
monitor.

HTH & good luck with your project!

Sascha

[1] http://www.mepisguides.com/printers/local-print/printer-test-page.png
[2] http://www.tomshardware.com/reviews/comparison,440-10.html
--
http://sascha.silbe.org/
http://www.infra-silbe.de/
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 490 bytes
Desc: not available
Url : http://lists.sugarlabs.org/archive/iaep/attachments/20101003/60da6664/attachment.pgp