User manual
40
Analysis
❙ Maximum voltage (V
p+
)
❙ Mean voltage (Mean)
❙ Minimum voltage (V
p-
)
❙ Rise time (t
r
)
❙ Fall time (t
f
)
The following ten measurement values are displayed at the
bottom of the screen:
❙ RMS value
Period
❙ Peak to peak voltage
Frequency
❙ Amplitude
Number of positive /slopes
❙ Pos. pulse width
Neg. pulse width
❙ Pos. duty ratio
Neg. duty ratio
Pressing the AUTO MEASURE key allows you to change
the six measurement parameters on the bottom right. You
may undo these changes by choosing RESET or restore
the default setting. Only one channel can be active in the
Quickview mode. All measurements will be performed on
the active channel. Pressing the QUICK VIEW key again
switched off the function.
9.4 PASS/FAIL Test Based on Masks
The Pass/Fail test allows you to evaluate if a signal is located
withindenedlimits.Thislimitsaresetbyaso-calledmask.
If the signal exceeds the mask, there is an error. These er-
rors will be displayed together with successful sweeps and
the total of all sweeps at the bottom of the screen. It is also
possible to perform certain actions if errors are discovered.
Press the QUICKVIEW key
10
in the ANALYZE section of
the control panel and press the soft menu key PASS/FAIL
to activate the mode which opens a menu to set and use
the mask test. Prior to starting the test by pressing the top
soft menu key TEST ON/OFF, it is necessary to generate
or load a mask 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
Fig. 9.9: PASS/FAIL mask test.
mask memory. The mask displays in white and appears as
an overlay of the output signal. The menu keys Y-POSITION
and STRETCH 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 in the CURSOR/MENU section
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 minimum 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 va-
lue 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 tempora-
rily 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.
PressthesoftmenukeyLOADMASKtoopenalebrowser
which allows you to load previously stored masks for the
test(leextension.HMK).Aloadedmaskcanbechanged
inthemenuNEWMASK.Changeswillbeappliedtothele
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:
❙ Audio signal if the tolerance limits have been exceeded
❙ Stopforrst-timefailure(numberisadjustable)
❙ Pulseforrst-timefailure(emitsapulseattheAUXoutput
in case of failure)
❙ Screendumpforrst-timefailureonUSB stick
❙ Screendumpforrst-timefailureonprinter
An action is performed if the respective condition is met
(e.g.aspecicnumberofmaskfailures).Eachactionisas-
signedauniqueconditionwhichcanbedenedseparately
from the other actions. The respective condition can be
denedinthemenuforthecorrespondingaction.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.