Wavetek 75 Instruction Manual page 31

Pressing the Edit key the first time enables the rubber
band editing features as follows:
The label for the F1 soft key will read "CSR" (Cur-
sor). Pressing F1 allows the cursor in the
waveform to be moved by rotating the control
knob. The top line of the display will indicate the
X-position of the cursor and the Y-value at that
position. If Z-axis modulation is used on an
oscilloscope, the cursor will be intensified. This
does not affect the output waveform.
The label for the F2 soft key will read "ADJX,Ym
(Adjust X or Y). Pressing F2 once allows a vertex
(at the cursor position) of a waveform to be moved
horizontally (X) by rotating the control knob. Press-
ing the F2 key twice allows vertical (Y) movement.
The top line of the display will indicate the X and
Y position of the vertex(cursor) and also(with an
annunciator) the adjustment axis (X or Y) currently
enabled
The label for the F3 soft key will read "L,R'TT1' (Left
or Right Thumbtack). Pressing F3 once allows the
horizontal position of the left thumbtack to be
changed by rotating the control knob. Pressing
the F3 key twice allows the horizontal position of
the right thumbtack to be changed. The position
of both thumbtacks will be indicated on the top
line of the display along with an annunciator
indicating the thumbtack whose adjustment is
currentlyenabled. If Z-axis modulation is used on
an oscilloscope, the thumbtacks will be
intensified.
Pressing the Edit key the second time enables the
standard waveform features as follows:
The label for the F1 soft key will read "FUNC"
(Function). Pressing F1 allows standard wave-
forms to be inserted between thecurrent thumb-
tacks (as set by L,RTT). The desired standard
waveform is selected by rotating the control knob
and is inserted when the EXEC soft key is pressed
as discussed below.
The label for the F2 soft key will read "ERASE"
Pressing this key followed by the EXEC soft key
will erase the entire active waveform by chang-
ing all Y-values to 0.
The label for the F3 soft key will read "EXEC".
(Execute). Pressing F3 causes the action selected
by the FUNC or ERASE keys to be executed. An
"Xu will be be displayed in the top right hand
corner of the display after EXEC has been
pressed.
Pressing the Edit keya third time enables thedigital
amplitude and offset features as follows:
The label for the F1 soft key will read "DAMPL"
(Digital Amplitude). Pressing F1 allows adjust-
ment, by rotating the control knob, of the ampli-
tude of the portion of the waveform between the
thumbtacks without affecting the rest of the
waveform. To accomplish this, the Model 75
digitally scales the Y-values of the waveform
points between the thumbtacks. The top line of
the display will indicate the amplitude of the por-
tion being adjusted as a percentage of full scale.
The digital amplitude can be adjusted to a
negative relative amplitude in order to invert a por-
tion of the waveform.
The label for the F2 soft key will read "DOFF"
(Digital Offset). Pressing F2 allows a portion of the
waveform between the thumbtacks to be offset
vertically, by rotating the control knob, without
affecting the rest of the waveform. The Model 75
accomplishes this by adding (or subtracting) a
fixedvalue to all of the points between the thumb-
tacks. The range of digital offset adjustment is
limited by the fact that the Y-value of any point
cannot be outside the range of
+
2047, so the
Model 75 will not allow this range to be exceeded.
The top line of the display will indicate the offset,
in points, relative to the original position, of the
portion being adjusted.
The label for the F3soft keywill read "L,R'TT" (Left
or Right Thumbtack). Pressing F3once allows the
horizontal position of the left thumbtack to be
changed by rotating the control knob. Pressing
F3 twice allows the horizontal position of the right
thumbtack to be changed. The position of both
thumbtacks will be indicated on the top line of the
display along with an annunciator indicating the
thumbtack whose adjustment is currently
enabled. Moving the thumbtacks has noeffect on
theoutput waveform. If Z-axis modulation is used
on an oscilloscope, the thumbtacks will be
intensified.
Pressing the Edit key a fourth time enables startlstop
address control and the waveform normalization
function as follows:
The label for the F1 soft key will read "START"
(Start Address). Pressing F1 allows setting, by
rotating the control knob, of the address of the
first waveform memory location to be part of the
active waveform. The top line of the display will
indicate both the current start and stopaddresses
along with an annunciator indicating that START
has been pressed.
The label for the F2 soft key will read "STOP"
(Stop Address). Pressing F2 allows setting, by
rotating the control knob, of the address of the
last waveform memory location to be part of the
Scans by ArtekMedia O 2006