Instruction manual

Subject to change without notice
16
and will only be terminated later. After termination the
RES-LED extinguishes but the signal display remains.
Briefly pressing the SINGLE pushbutton (RESET
function) again restarts a new single event capture which
then overwrites the previously recorded display.
Single events recorded in DUAL mode can also be
displayed in the XY mode when switched over to XY
operation.
XY mode
Briefly pressing the SINGLE pushbutton (RESET function)
causes one complete trigger independent signal
recording. The RES-LED extinguishes after completion.
Thereafter it is possible to switch over to DUAL mode
to display the signals in Yt (time base) mode.
Attention!
If time coefficients between 100s/div and 50ms/
div are present the signal acquisition becomes
visible at once as a ROLL display, but the signal
acquisition has nothing to do with ROLL mode.
b)
Briefly pressing the SINGLE pushbutton (RESET
function) is also effective if (instead of SINGLE)
ENVELOPE or AVERAGE mode is selected.
In both modes the evaluation / averaging begins anew.
ANALOG MODE ONLY
Capturing single events can also be carried out in analog
Yt (time base) mode (e.g. photographing).
Briefly pressing the SINGLE pushbutton activates the
RES-LED in SINGLE mode. The next trigger event then
unblanks the beam and causes a one time base sweep.
Only in chopped DUAL mode can both channels be
displayed during one time base sweep.
XY mode is not available in combination with SINGLE
operation.
(11) REFERENCE - Reference memory pushbutton with two
associated LEDs.
The instrument contains two non volatile signal data
memories. Signal(s) stored in these memories can be
displayed separately or together in addition to the current
signal(s). The REFERENCE memory content will not be
erased by switching the instrument off.
Display
If neither the associated “I” nor the “II” LED is lit, no
reference signal is displayed. Briefly pressing the
REFERENCE pushbutton switches LED “I” on. Then in
addition to the current signal the reference I memory
content is displayed. The switching sequence is:
dark – I – II - I and II - dark.
The LED(s) indicate the memory content(s) which are
displayed. The display of the current signal(s) is not
affected by the reference display.
In XY mode the switching sequence is:
dark – I and II – dark.
Overwrite
To overwrite the reference memory content with current
signal(s) the following procedure is required:
Determine the reference memory(ies) by briefly pressing
the REFERENCE pushbutton. Then press and hold the
pushbutton until a beep confirms reference memory
acquisition. Before starting the procedure, the current
signal can, but must not be protected by the HOLD
function.
As the reference signal is then equal to the current signal,
it is usually not visible at once. If neither HOLD nor
SINGLE is active, the current signal can be shifted by
the Y-POS. control(s) to make the reference signal visible.
If both REFERENCE I and II LEDs lit and DUAL or XY
mode is active, both reference memories can be
overwritten at the same time. The signal from channel
I is stored in reference memory I and consequently
channel II in reference memory II. The relation between
channel and reference memory is present only during
DUAL or XY operation. If only REFERENCE I is active
and consequently displayed, only the current signal of
channel I can overwrite it.
In single channel mode (CHI or CHII) the current signal
can be stored in each of both reference memories. This
permits creation of two reference curves with different
Y positions and to display them in condition REFERENCE
I and II LEDs lit. The current signal then may not exceed
these limits. To avoid overwriting both reference
memories with the same signal, pressing and holding
the REFERENCE pushbutton only causes a warning beep
if single channel mode is present.
(12)SAVE / RECALL – Pushbuttons.
The instrument contains 9 non volatile memories. These
can be used by the operator to save instrument settings
and to recall them. This relates to all controls which are
electronically selected.
SAVE
Press the SAVE pushbutton briefly to start the save
procedure. The readout then indicates the letter “S”
followed by a cipher between 1 and 9, indicating the
memory location. If the instrument settings stored in
this memory location shall not be overwritten, briefly
press the SAVE or the RECALL pushbutton to select
another memory location. Each time the SAVE
pushbutton is briefly pressed the memory location cipher
increases until the location number 9 is reached. The
RECALL pushbutton function is similar but decreases
the memory location cipher until 1 is reached. Press and
hold SAVE for approx. 3 seconds to write the
instruments settings in the memory and additionally
switch the readout information (i.e. “S8”) off.
RECALL
To recall a front panel setup, start that procedure by
briefly pressing the RECALL pushbutton. The readout
then indicates the letter “R” and the memory location
number. If required, select a different memory location
as described above. Recall the settings by pressing and
holding the RECALL pushbutton for approx. 3 seconds.
If the SAVE or the RECALL pushbutton was depressed
inadvertently, briefly press both pushbuttons at the same
Controls and Readout