Split Cursor Icon; Re-Scale Vertical Icon; Waveform Display Number; Horizontal Scale - Aston Martin DB7 Workshop Manual

The Aston Martin Lagonda Diagnostic System
Users Guide
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Split Cursor Icon
The split cursor icon spl its the vertical cursor into
two parts.
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One permanent static cursor represented by a solid vertical
line in the waveform display, and one moveable cursor
represented by a dotted vertical line, this is moved by
applying finger pressure to the screen in the position the
cursor is required.
The digital display of the waveforms will now represent
the difference in levels between the two cursors and not
the absolute signal level as detailed earlier.
Re-scale Vertical Icon
Normally all of the waveforms are displayed
with the vertical axis representing the maximum
possible variation ofthesignal, e.g. battery voltage
0 to 16 V.
The re-scale icon causes the waveform to scale such that
the recorded variation determines the scale, this normally
enlarges the vertical scale.
The scaling operation can be performed on any of the
displayed waveforms by highlighting the parameter name
prior to the operation.
Once auto-scaling has taken place, further manual scaling
may be achieved by using the ' + ' and '-' system icons.
W a v e f o r m Display Number
This icon enables control of the number of
waveforms displayed on the screen at any one
MMV
MMV
time.
Pressing this icon causes the ' + ' and '-' system icons to
appear. Using these system icons increase or decrease the
number of displayed waveforms.
It should be noted that the more waveforms displayed the
poorer the detail becomes, therefore the number of
displayed waveforms should be kept to a minimum.
Horizontal Scale
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This icon performs the same function as the re-
scale vertical icon only for the horizontal axis.
By expanding the scale more detail will be available, thus
proving easier to analyse. However the amount of time
displayed on any one screen will be reduced.
Bargraph / Digital display
Bargraph / Digital display provides another format in
which to display recorded date.
The Datalogger icons operate similar to those used in the
waveform display. However one new icon is provided as
a toggle option from bargraph to digital display.
OV
TP :3.91V
ECT: 57°C
5V
-49°C
lAT: 0°C
150°C
-49°C 150°C
I I 88
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Bargraph / Digital Display
On-Road Trigger
When on-road trigger is selected using the motorway icon
from the main menu a symbol is displayed over the entire
screen display area.
This option is intended for use during on-road tests to
ensure that the PDU screen does not distract the driver.
Press the record icon to start capturing data, a trigger icon
will replace the record icon.
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Datalogger Trigger Icon
Press the trigger icon to instigate the manual trigger.
Once the trigger procedure has occurred, a stop icon will
replace the trigger icon. Press the stop icon to stop
capturing data.
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September 1996