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3)
Set CHAN 2 to OFF (49).
4)
Set MEMORY D to ON (47).
5)
Set DUAL GRID to ON by pressing push button (14).
6)
Select Memory D by pressing SELECT push button (44).
7)
Adjust VERT CAIN control (42) and Vertical POSITION control (40)
center the trace.
The
above
procedure
enables
two
independent
waveforms
to be
simultaneously stored and displayed. Calling the Memory Status menu (3)
enables the user to review all the acquisition parameters.
Note
that instead of storing the currently acquired CHAN 1 waveform
into
Memory C and CHAN 2 waveform into Memory D, the Store Trace menu
also
allows the user to inverse this configuration, and to store the
CHAN 1 waveform into Memory D and the CHAN 2 waveform into Memory C.
8.9
Redefinition
Function
- Expand Memories
C, D
As mentioned in Section (5.2.4), the default signal sources for Expand
A and B are CHAN 1 and 2, respectively.
It is possible, however, to
expand a waveform stored in reference Memories C and/or D by redefining
these memories to be the new signal expansion source.
I.
Expansion
of MEMORY C with
EXPAND A
Just as Expand A and B enabled the user to expand the signals contained
in CHAN I and 2 (Section 8.3), the signals in reference
Memories
and/or D can be expanded as described below.
Procedure:
1)
Store the signal into Memory C as described in Section 8.8.
2)
Press EXPAND A push button (46).
3)
Use the Vertical
POSITION
knob to separate
the traces
on the
screen.
4)
Set CHAN 1 to ON.
5)
Press SELECT push button (44) to frame the X-Chan i message.
6)
Press REDEFINE push button (45).
7)
Press push button (4) to define Memory C as the new signal source
for Expand A.
From this step on, the procedure
to follow
is identical
to that
described in Section 8.3 for CHAN i, 2 expansion (steps 3 through 6).
II. Expansion of Memory D with Expand B
The procedure used here is identical to that detailed above, except
that Expand B is substituted for Expand A in Step i, and Memory D is
redefined as the new source for expansion (Step 4).
8-11
Basic 9400A Waveform Measurements
and Operating Procedures
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