Specifications

28
Subject to change without notice
Analysis
Fig. 9.7 PASS/FAIL mask test.
grids and the information about the FFT display (span and center
frequency) is shown below the larger area. One of these displays
is brighter than the other, after selecting the FFT function this one
will be brighter. The large knob in the time base area will set the
span, and the small knob X-POSITION the center frequency. By
pushing the large knob SCALE TIME/DIV, the display of the time
base settings will become brighter, and both knobs will resume
their original time base functions. Pushing the large knob SCALE
TIME/DIV again will make the Zoom and position seeting brighter
and both knobs are adjusting the zoom function. The extended FFT
menu will open after pushing the key FFT again.
In this menu the display modes , , and 
can be selected. The envelope function will write the maxima
spectra of all captured signals on top of each other; this will yield
some kind of envelope or area with all FFT results ever obtained.
By pushing the respective soft menu key a display of the mean
value can be obtained; with the universal knob the number of
averages can be chosen in powers of 2 from 2 to 512.
Fig. 9.6: Extended FFT menu
The soft menu item  allows you to select from the fol-
lowing window functions:
– Hanning – Hamming
– Blackman – Square
By choosing the menu item , the FFT amplitude can
be scaled either linearly (Veff) or logarithmically (dBm, dBV). If
another channel is desired as the source for the FFT, this can be
selected simply by pushing the respective channel key. In order
to terminate the FFT function either push the FFT key again or
use the menu key next to . The oscilloscope will return
to its state before the FFT function was selected.
9.4 Quickviewmeasurements
The Quickview measurements are activated by pushing the key
QUICKVIEW in the ANALYZE section of the front panel. The key
will light up indicating that the scope responded. This mode
offers the following 5 parameters which are directly displayed
in the signal:
– Maximum voltage
– Mean voltage
– Minimum voltage
– Rise time
– Fall time
4 additional parameters will be displayed in the right bottom
corner of the screen: RMS value, Period, Frequency and Peak-
to-peak voltage
Only one channel may be activated in the Quickview mode. If
another channel is selected by pushing its key, the previously
selected one will be deactivated. Now the parameters of the new
channel will be shown. By pushing the key again; a Softmenue
will open, where the PASS/FAIL mode can be selected. Pushing
the QUICKVIEW key again let become active all channels which
were activated before the key was pushed and the Quieckview
mode entered.
9.5 PASS/FAILtestbasedonmasks
In order to access the PASS/FAIL mode please proceed as
follows: Press the QUICKVIEW key in the ANALYZE area of the
front panel twice, this menu will open, then press the soft menu
key PASS/FAIL, this will activate the mode and open a menu
for the settings and the use of the mask test feature. Prior to
star ting a test by pressing the top toggle key TEST ON/OFF, it is
necessary to generate or load a mask and to select an action.
For the generation of a new mask press the soft menu key next
to the menu „NEW MASK“, a menu will open. By pressing the
key COPY CHANNEL, the present signal can be copied into a
mask memory. The mask is coloured white and appears as an
overlay of the input signal. Using the menu keys Y-POSITION
and Y SIZE, this curve can be shifted resp. enlarged in vertical
direction. The two menu items WIDTH Y and WIDTH X allow
to set the tolerance limits of the mask, the universal knob is
used to enter values with a resolution of 1/100 division. The
tolerance mask is displayed in white in the background. The
mask thus generated can be stored: press the soft menu key
STORE, this will open a data le dialogue window, storage is
possible either into the instrument memory or onto an USB
memory stick. Pressing the MENU OFF key will cause the
return to the previous menu. In order to load a mask genera-
ted earlier, choose LOAD MASK, a data le dialogue window
will open, select the desired mask (le name .HMK) from the
internal memory or an USB memory stick. The mask is loaded
by pressing the key LOAD and then displayed. Changes to a
mask are possible in the menu NEW MASK.
By pressing the key ACTIONS in the PASS/FAIL main menu
a menu will be opened which will offer these 3 possible ac-
tions:
1. Audible signal if the tolerance limits are exceeded.
2. Stop if this happens the rst time.
3. Pulse output if this happens the rst time.
(Actions 2 and 3 may be possible only after a rmware update
at a later date.)
The desired action is selected by pressing the respective soft
menu key, this menu item will be shown with a blue background.