# Timing diagram understanding....

Discussion in 'Electronic Basics' started by JJ, Mar 4, 2006.

1. ### JJGuest

Hi Folks,
I've just switched jobs from being an RF/uWave engineer to a position
in a logic division. There's a reason for this and the reason is that the
logic
guys really need an RF engineer. There have been some changes in the world
of ICs for things like cellular, particularly the new DigRF and OBSAI/CIPRI
interfaces in chipsets, where the associated companies need to look at both
the logic side of things and the demodulation side of things.

My company is wonderful-and we have lots of canned training, but it's not
quite enough.
The folks I'm working with will teach me quite a bit, but I'm hoping to
learn some
things on my own to minimize the time those folk need to spend teaching me.
In the past I've used Logic Analyzers a few times. What I'm looking for is
any
on-line stuff that will teach me how to understand a timing diagram. The
very
simple ones I do understand but now I'm finding I don't understand the
symbolism,
and the timing associated with clocks, data, strobe lines etc.

If anyone can point me to a good resource, I'd be very grateful!
Thanks-

2. ### John FieldsGuest

---
Excellent resources are this newsgroup, sci.electronics.design, and
alt.binaries.schematics.electronic, where binaries can be posted.

I've cross-posted this reply to all of those groups in order that
anyone who frequents any of those groups and can help will have
their posts posted to all of the groups.

Basically, a timing diagram is a picture of what happens at
particular places in a circuit as time goes by, with time increasing
along the "X" axis in quadrant I of a Cartesian plot and the nodes
of interest of the circuit in question "stacked" on the Y axis.

As time goes by, the amplitude changes of the nodes are plotted in
Y, with the result that cause and effect relationships can be seen
between the various signals on the diagram, with reference to time.

I don't understand what you mean by the 'symbolism', but if you'd
care to explain in a little more detail I'm sure someone here will