13
Subject to change without notice
In this operating mode a single signal acquisition process
or sweep can be started with a trigger, providing the
trigger circuit has been previously activated with
RESET
.
SINGLE automatically switches to normal triggering
(NM
LED
lights up). Otherwise the trigger automatic would
start the signal acquisition processes without an input
(trigger) signal.
STORAGE MODE ONLY
SINGLE
mode is indicated by the SGL-LED (lit).
If the readout displays additionally the pre- or post-trigger
value
(PT...)
,
SINGLE
mode in combination with Yt (time
base) storage mode is selected. In connection with
XY
storage mode the readout displays the sampling rate (e.g.
40MS/s) and replaces the pre- or post-trigger value
(PT...)
by
SGL
.
When switched over to
SGL
, single signal acquisition is
in operation. The signal capture currently in progress and
not yet finished will not be terminated but continued to
the end.
Attention!
If SINGLE mode is present in combination with DUAL
mode, the minimum time coefficient is 5µs/div instead
of 1µs/div. Similarly if X-MAG. x10 is operative, then
500ns/div replaces 100ns/div.
ANALOG MODE ONLY
Selecting
SINGLE
mode switches the current sweep off
and blanks the screen.
SINGLE
mode is indicated by the lighting
SGL-LED
and
the readout displaying
SGL
next to the /
(SLOPE)
symbol.
Two signals can be displayed during a single sweep only
when it is continuously switched between channel I and
channel II (chopper operation).
See DUAL (22).
RESET (RES)
Briefly pressing the
SINGLE
pushbutton causes a
RESET
.
The result depends on the current signal capture mode.
STORAGE MODE ONLY
A:
In combination with
SINGLE
, briefly pressing the
SIN-
GLE
pushbutton activates the RESET function. Then both
LEDs (
SGL
and
RES
) are lit. Whether the
RES-LED
flashes once or is lit constantly, depends on:
1. the presence or absence of a trigger signal,
2. the selected time coefficient (time base) and
3. the pre- or post-trigger setting.
After the
RESET
function is switched on, the signal
acquisition will be effective at once if the
HOLD
function
is not active. If the pretrigger function is active, the
prehistory must elapse before the trigger event becomes
effective. The signal capture terminates with the trigger
event only with 100% pretrigger setting.
With all other pretrigger and post-trigger settings, the
signal acquisition is not complete when the trigger occurs
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.
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 not-
hing 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
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 one time base sweep.
(11) REFERENCE
- Pushbutton with 2 functions, associated
with 2 LED’s (only in Yt (time base) storage mode).
The oscilloscope contains 2 non volatile reference memories.
One reference signal can be displayed together with the
actual signal. The contents of the reference memories are
not erased when the instrument is switched off.
The LEDs associated with the
REFERENCE
pushbutton
indicate the display of a reference signal and from its
origin. The reference signal is displayed in addition to the
actual signal. With the exception of DUAL mode, there is
no direct relationship between the reference memories (
I or II) and the channels (I or II).
Display
Briefly pressing the REFERENCE pushbutton switches
the reference indicator LEDs and consequently the signal
display in the following sequence:
reference memory off -
reference memory I -
reference memory II -
reference memory off.
Overwrite
After the reference memory has been selected (briefly
pressing) press and hold the
REFERENCE
pushbutton
until an acoustical signal indicates that the previously
stored reference signal has been overwritten by the
actual signal. During this procedure the instrument can
but must not be set to
HOLD (HLD)
.
In
DUAL
mode only, REFERENCE memory I relates to
channel I and consequently REFERENCE memory II
relates to channel II. In this case the overwriting procedure
Controls and readout
