Excerpt:
"Lab Scopes"-just mention the words, and some guys shudder with
fear and confusion. Oh, they may not show it, but deep down inside, they get
nervous. How do they work, how do you get the pattern on the screen, and what
does the pattern mean? How do you know if the signal is good or bad? That's
what this book is about. You could call this "Lab Scopes for Dummy's", except
I'd probably get a call from the lawyer of the group that puts out all those
books, and we don't want that.
The purpose of this book is to make it simple. I firmly believe that
if you can't make something simple when you explain it to somebody else, you
don't really understand it. Later on, we'll get into some more complex applications
of lab scopes. But we'll still make that simple, too. (You'd be surprised at
all the testing you can do that will help you with your diagnosis.)
This book is designed for the technician who doesn't really know how to use
a lab scope, also called a DSO. (Digital Storage Oscilloscope)
We're going to explain these things:
|
|
 |
- How does a lab scope work?
(in very simple terms)
- When you look at a pattern
on the scope, what are you seeing, and how do you know if it is bad?
- How do you get a pattern
on the scope, how do you do the adjustments to make the pattern look
right?
|
| |
| |
- What do you do when you can't get a pattern on the screen at all? (A lot
of guys have this problem, but don't admit it to their friends…)
- Where and how do you hook up the scope to the circuit? Does it make much
difference?
- What is trigger and how do you make it work for you instead of against you?
- When should you use a 10:1 probe?
- How does the smapling rate of your scope affect your pattern?
We'll show some pictures, to make things simple. And please forgive my sick
sense of humor, or attempts at humor. It's meant to help keep you awake. I know
after a long day at work on your feet, it would be easy to just nod off. So
hang on to your hats, here we go…
The book contains these chapters:
- Lab Scopes - How do they work? - Compared to a Scan Tool; Compared
to a Voltmeter; What a Lab Scope Shows; Analog or Digital; Analog Lab Scopes;
Digital Lab Scopes; Downside of Digital; Advantages of Digital; Introduction
to a Basic Model; Divisions or Graticules; Voltage; Time; Zero Point; Channels.
- Basic Electricity, Circuits and Digital Signals - What is Electricity?;
Definitions; Voltage; Amperage; Resistance; Watts; Types of Circuits; Series
Circuit; Parallel Circuit; Digital Signals; Hertz or HZ; Duty Cycle; Pulse
Width; Number Symbols; Milli or m; Kilo or K; Micro; Mega or M
- Pattern Recognition - Magnetic Pickup RPM Sensor; Hall Effect RPM
Sensor; Optical RPM Sensor; Throttle Position Sensor; Fuel Injector; Duty
Cycle; Ignition Primary; Alternator Ripple.
- Getting a Pattern on the Scope - What if nothing happens when you
turn it on?; Where to connect the test leads?; The Black Test Lead; The Red
Test Lead; Warning; To look at a Computer Input; About Shielded Wires and
Electrical Noise; To look at a Computer Output; How to Connect to the Wire;
How to Back Probe a Wire; To Puncture or not to Puncture the Wire; Why Do
It?; How to Puncture the Wire; What to Adjust? Or Why Doesn't My Pattern Look
Right?; Voltage Adjustment; Time Settings; Ground Positioning; 10:1 Probes;
Sampling Rate; What to Do.
- Trigger - Positive and Negative Slope; To Adjust the Trigger; Tricky
Stuff About Trigger; What do you mean Trigger Mode?; Trigger Mode and Intermittent
Signals; Uses for Trigger Mode.
To read a free sample excerpt from this
book, click here.
Please note that this is an electronic
book - a file that lives on the internet. It is cheaper than
the printed version of the book. You can access it as soon as your order
is complete, save it to your computer, print it out or look
at it another day online.
