40
Subject to change without notice
A n a l y s i s
and to select an action. To generate a new mask, press the soft
menu key NEW MASK. Masks are displayed as light gray curves/
waveforms on the screen. If a mask was copied or loaded, you
can use menu items to change the expansion of the signal form
and consequently the limits for the test.
In the menu that opens you can use the key COPY CHANNEL to
copy the current signal into a mask memory. The mask displays
in white and appears as an overlay of the output signal. The
menu keys Y-POSITION and STRECH Y enable you to shift this
curve vertically or to enlarge it. The two menu items WIDTH Y
and WIDTH X allow you to set the tolerance for the mask. The
universal knob or the KEYPAD button are used to enter values
with a resolution of 1/100 division. A mask includes a minimum
and a maximum value for each captured data value. The mini
-
mum and maximum value for a source curve with only one value
per data are identical. The width indicates the distance between
the peripheral points and the original point. The greater the
selected value is, the greater are the potential curve deviations
in the amplitude. The tolerance mask is displayed in white in
the background. The generated and edited mask can be used
immediately for the test, however, it is only saved temporarily
in the instrument storage. The soft menu key SAVE can be used
to store the mask permanently to a USB stick or to the internal
memory. Press the key MENU OFF to return to the start menu.
Press the soft menu key LOAD MASK to open a file browser
which allows you to load previously stored masks for the test
(file extension .HMK). A loaded mask can be changed in the
menu NEW MASK. Changes will be applied to the file when the
mask is edited and saved.
Pressing the soft menu key ACTIONS in the PASS/FAIL main
menu opens a menu with the available actions. The following
four actions can be performed:
1. Audio signal if the tolerance limits have been exceeded
2. Stop for first-time failure (number is adjustable)
3. Pulse for first-time failure (emits a pulse at the Y output in
case of failure, only for instruments with
bus signal source)
4. Screen dump for first-time failure
An action is performed if the respective condition is met (e.g.
a specific number of mask failures). Each action is assigned
a unique condition which can be defined separately from the
other actions. The respective condition can be defined in the
menu for the corresponding action. Select the respective action
by pressing the appropriate soft menu key; the corresponding
soft menu item will be highlighted in blue. Press the MENU
OFF key to return to the main menu and to start the mask test.
Fig. 9.7: PASS/FAIL mask test.
On the right below the display window you can view the total
number and the total duration of the tests (in brackets) in white.
The number of successful tests and their percentage (in brack
-
ets) are displayed in green, and the number of failures and their
percentage (in brackets) are displayed in red. If a test has been
started, the previously unavailable soft menu key PAUSE is now
activated. Pressing the PAUSE key will interrupt the test while
the acquisition of signals and the total duration are continued.
If you press the PAUSE key again, the test will be resumed and
all event counters continue to be incremented. If you deactivate
a test by pressing the soft menu key
Stop
the event and time
counters will be stopped. If a new test is started by pressing the
soft menu key TEST activated (Run), all counters will be reset
and resume at zero.
The PASS/FAIL mode is deactivated by pressing the soft menu
key PASS/FAIL OFF.
