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(a)
(b)
(c)
(d)
Fig.9. (a) The harmonic, (upper trace), and sideband, (lower
trace), cursors
being used to
highlight harmonics and sidebands
(b)
the delta cursor being used to make measure-
ments across a band of frequencies, (c) use of the mask
cursor, (lower
trace), to
remove unnecessary detail from a Nyquist plot, (d) the reference cursor
The cursor is identified as an inten-
sified column which is movable either
continously or
in
single steps. In a
dual trace display, the cursors on the
upper and lower traces can be con-
trolled individually or aligned and
moved synchronously.
On the x -axis, the cursor is used to
read time in sample number or sec-
onds, (including compensation for the
delay A
--
B for two channel func-
tions), frequency in Hz, cpm, or or-
ders, ( cpm and orders being read via
the flexible cursor, described later)
,
amplitude
level
in volts for probability
mode, volts or gain for a Nyquist plot,
and degrees for a Nichols plot. It is
also used to read
~
x in terms of
~
t or
~
f values between harmonics, side-
bands, the delta cursor, or reference
cursor.
On the y -axis, the cursor is used to
read time domain functions in V or
engineering units, and frequency do-
main functions in
v'
V
2
'
V
2
/Hz,
V
2
s/Hz, U, U
2
,
U
2
/Hz, U
2
s/Hz, and
dB, the dB values being referenced to
a user-defined reference value. Phase
is read in degrees and probability in
%, %
N,
or
%
/RMS, with linear
scaling.
A special cursor field is used to read,
(where relevant), the total power of a
displayed function. It is also used to
read the power between the delta cur-
sors, that power divided by the total
power, and
~y
between the delta cur-
sors or the reference
cursor.
Post processing functions
The 2032 contains a number of oth-
er post processing functions in addi-
tion to the equalize function men-
tioned earlier. Displayed time domain
functions can be integrated or differ-
entiated up to two times, and frequen-
cy domain functions can be multiplied
or divided by
jw
or
jw
2
•
System delays
can be compensated for in phase
curves, (a simplified form of phase un-
wrapping), and correlation curves can
be displayed with or without the bow-
tie correction. A flexible cursor allows
cursor readings on the x -axis to be
made in user-defined units in both the
time and frequency domains, such as
distance, cpm, or orders. Any auto-
...
-·
....
iiilli:~
liiiii::
iii
ii
................
..._._.,
....
I I I I I
MAIN
V
~2S
949
X'
4920Hz
Fig.lO. Example of a spectrum shown with
a logarithmic frequency scale
Fig.ll
.
(a) The Graphics Recorder Type 2313, (b) an example of a hard copy of the 2032
screen obtained using the 2313
5
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