Advanced Features
2.
ADVANCED FEATURES
The main body of this section covers the menu system, its
structure and how to select the features controllable
through
it.
In
addition, all the remaining buttons not
covered
in
Section l are described here.
2.0 ADDITIONAL BUTTONS
The Save, Recall and Clear Trace Buttons
These three buttons are used in conjunction with the
numeric keys
0 to 9 at the side of the display.
The
Save button enables the user to save a trace in the non-
volatile RAM, a battery backed-up section of memory.
When this
is
done, the 4070 will retain the trace information
for three months after
power down.
Save Pressing this button calls up the 'Save Trace' menu.
Through this it
is
possible to retain up to eight traces
for three months after power down.
When
Save
is
pressed, the display
is
replaced by a short
menu. This contains eight
lines
of
text: trace
lA;
trace
lB;
trace 2A; to trace 4B. Each line
of
text
is
aligned with one
of the numeric keys. Each active trace has a Gould logo
alongside the text.
If,
for example, you wished to save trace
lB,
then you would press the number 5 key as that would be
next to that
line of text.
Once a numeric key has been pressed, the display will be
replaced by a second short menu. This has eight lines
of
text: memory 1; memory 2; memory 3; memory 4; to mem-
ory 8. This
is
requesting where to place the data. Again,
each
line
is
associated with one
of
the numeric keys. Select
which memory you wish to save the trace in by pressing the
relevant button.
The trace
will
now have been saved and the screen will
return to displaying the traces.
Note:
When a trace is saved
into
a memory, the previ-
ous contents
of
this
memory
will
be lost.
Recall Pressing this button calls up the 'Recall Trace'
menu.Through this menu it
is
possible to re-display
any of the saved traces.
When Recall
is
pressed, the display
is
replaced by a short
menu containing eight lines
of
text: memory 1; memory 2;
memory 3; memory 4; to memory 8. Each
of
these
is
lined
up with one of the numeric keys.
If,
for example, you
wished to recall memory 2, you
would press button 2.
When one of the numbers has been pressed, the display will
be replaced
by
a second short menu requesting with which
trace to display the data. This has four
lines of text: trace
IA;
trace
lB;
trace 2A; and trace 2B. Each will be in line
with one of the number keys, so to select the trace press the
relevant number.
The screen
will
now return to its previous trace display and
the requested backed-up memory
will
now be in the chosen
trace (and
still in memory).
44
Section 2
Note: When a
memory
is recalled, the screen trace
will
not
automatically be placed on hold.
If
the instru-
ment
is in Continuous capture mode, the recalled
trace
could
be
immediately
overwritten.
Trace
on/otT
Pressing this button calls up the 'Trace
on/off
menu. Through this ii
is
possible to remove
or
display
traces on the screen.
When Trace
on/otT
is
pressed. the display
is
replaced by a
menu comprising eight lines of text referring to the four
traces
IA,
lB,
2A and 2B. Each lines up with one
of
the
number keys.
If
for example you wished to remove
or
dis-
play trace
IA
from the display, you would press button I
which
would be next to the text 'trace
IA'.
The Abort Button
This button
will
perform one of several different functions,
depending on the state of the 4070 at the time the button
is
pressed.
If
the
4070
is
currently driving either the internal plotter
or
an external plotter, p1essing Abort will ter .. 1inate the plot-
ting cleanly when the plotter has finished the current line
or
character.
If
the 4070
is
communicating with a host computer via
GPIB(IEE488) or RS423, pressing Abort
will
terminate
communications, causing a change from remote
or
local
lockout to local status leaving the 4070 unaddressed.
Abort also allows you to escape from the
Save, Recall and
Clear Trace menus.
Other uses
of
the Abort button are described elsewhere in
the text, where relevant.
Abort Terminates plotting at the end of the current line
or
character and terminates
1/0
communications via
GPIB/RS423 returning the instrument to Local.
Allows escape from
Save, Recall and Clear Trace
menus.
.2.1 MASTER MENU
Although the menu system controls a considerable number
of
functions, it
is
designed to be simple to use. There
is
one
master menu from which all other menus can be obtained
with a single button push.
Master Menu
Pressing this button calls the master menu
onto the screen.
Menuffrace Pressing this button calls the last used menu
onto the screen. A second press returns the screen to
the trace display.
Each entry on the master menu
is
also a menu, each cover-
ing one aspect of the
4070. The text
is
lined up with the
numeric buttons
1-8
on the side
of
the display. To obtain
any secondary menu simply press the relevant button.
Status This menu displays information about the present
setup and backup memory setups
of
the instrument.
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