TIME MAGNIFIER knob (43) - This control horizontally expands waveforms
up to I00 times.
Overall timing accuracy is improved at higher magnification factors,
since the expand function is controlled digitally and makes use of the
scope’s high number of recorded data points. This control has no effect
on MEMORY C, D or FUNCTION E, F.
SELECT button (44) - Chooses one of the traces - EXPAND A through
FUNCTION F - to be controlled via Display Control knobs and buttons
((39)-(45)). The selected trace is indicated by a rectangular
around the waveform descriptor in the Displayed Trace field (V).
Pressing the SELECT button (44) moves the rectangle to the next
displayed trace in a rolling sequence.
REDEFINE button (45) - Used to redefine the identity of the selected
waveform. EXPAND A, B traces may be redefined to be the expansion of
CHAN 1 or CHAN 2, MEMORY C or D or FUNCTION E or F (for 9400A’s
equipped with the Waveform Processing Option).
Pressing the REDEFINE button (45) calls a menu on the left-hand side
the screen enabling selection of the desired source redefinition. When
the button corresponding to this redefinition is pressed, EXPAND A or B
will be temporarily selected as the new source trace until subsequent
redefinition is performed. The default signal sources are CBAN I for
EXPAND A and CHAN 2 for EXPAND B.
It is not possible to redefine Memories C and D; Function E and F may
only be redefined if your 9400A is equipped with the Waveform
Processing Option. For scopes with this option installed, see Section
l0 which deals with the Waveform Processing Option.
5.1.6 Screen Adjustments
INTENSITY knob (12) - Adjusts the intensity of the displayed trace and
all alphanumeric readouts and messages. The INTENSITY control may be
adjusted in either manual or remote control mode.
GRID INTENSITY knob (13) - Controls grid and graticule intensity
independently of displayed trace intensity.
DUAL GRID button (14) - This button switches between single and dual
grid modes. The dual grid is useful when displaying multiple traces, in
which case the CHAN I display is permanently assigned to the upper grid
and CBAN 2 to the lower grid. All other displayed traces may be
repositioned anywhere on the screen via the Vertical POSITION control
(4O).
5-14
Manual Operation
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