Scans by ArtekMedia © 2007
· �
:
:
•
Chapter 3
;::
Measurement Setup Operations
3
�
'=3
�
"3
: �
: �
�
"3
�
(I
=3
:y
�
:y
�
�
�
:g
�
3
�
(t
�
"i"i
�
Before performing a measurement on the HP 7090, several front-panel
operations are necessary. Most of these operations involve specifying setup
conditions appropriate for your measurement application. For example,
TOTAL TIME
is used to establish the recording time; the
RANGE
setting(s) are
used
to
match the sensitivity and range of the HP 7090
to
the input
signal(s). Front-panel operations can also be used to draw a scaled grid to
receive the measurement plot.
This chapter describes how
to
perform these measurement setup operations.
Information is also provided on how
to
connect analog input signals
to
the
HP 7090. After you become familiar with the material presented here, you
will be ready to perform the direct and buffered recording procedures
discussed in Chapter Four.
The Recording Area
The direct and buffered recording modes can be used
to
produce hardcopy
plots ofinput signal data. Data is plotted or "mapped" onto a specified area
of the paper - a rectangular coordinate system called the
recording area.
The following illustration shows a hardcopy plot of a Channel
1
input
signal measured against time. The recording area is the area covered by
the grid. (The axes labels shown in this and subsequent illustrations were
not achieved using front-panel operations. Labeling of the axes can be
accomplished. however, by issuing instructions to the HP 7090
via
an
HP-lE interface. Refer
to
the Interfacing and Programming Manual.)
"
w
6.0
z
z
<
"
u
o.
0.0
TIME (MILLISECONDS)
50.0
A Recordinx Area
and
PloueJ"Data
Measurement Setup Operations
3-1