12
(b) MENU This button is used to select the
various storage modes:
PROBEx1, x10 - SMTH (Smooth)
ON, OFF - AVG (Average) 4, 16,
64, 256 and NORM - ROLL ON,
OFF.
- ITPL (interpolation) OFF, LIN,
SIN-AMAG (= ALT MAG) ON, OFF
- G-NG (Go-NoGo) XH, OH -
NORM. After each button press,
a LED under the button cap is
lit.
(c) HOLD When this button is pressed, the
sampling process is paused/stop-
ped and the last signal wave-
form displayed is frozen. When
the button is pressed again, a
LED under the button cap is lit.
Pressing this button again
restarts the sampling process
and the LED goes out.
(d) SAVE This button is used to store the
instantaneously displayed signal
waveform in the "recording"
memory as soon as the Hold
button is pressed. A LED under
the button cap is briefly lit.
(e) RECALL This button is used to reproduce
the recorded signal. Two mem-
ory contents can be retrieved.
After this button is pressed, a
LED under the button cap is lit.
The previously set input sensi-
tivity in V/div, the horizontal
deflection in Time/div and the
signals in memory A (=1) or B
(=2), S A or S B are displayed in
the lower third of the screen
overlay.
(f) PLOT This button initiates transfer of
the signal from the screen to an
X-Y plotter. The Hold button
must be pressed beforehand to
achieve this.
(g) SELECT This button can be used to
select/set/change the operating
modes under MENU.
(h) SINGLE The red LED under the button
cap is lit to show that a trace is
displayed as soon as the trigger
signal is obtained. After trig-
gering, the LED goes out. When
the sampling process has been
completed, a new signal wave-
form is shown on the screen.
The SINGLE sequence is termin-
ated, the screen signal is paused
(HOLD) and the LED under Hold
goes out.
2.1.6 General
(33) DIP switch and RS-232 interface:
DIP switch The DIP switch is used to adapt
the interface to any plotter or
computer that is connected to
the oscilloscope.
RS-232
connection The connecting cable between
the oscilloscope and the plot-
ter/computer is connected to this
'D' sub-miniature socket.
(34) EXT BLANKING INPUT:
If a positive signal is applied to this BNC socket
at the rear of the unit, this darkens the trace; a
negative signal makes the trace brighter
(unblanking/blanking/modulation).
(35) CAL:
On this pin there is a rectangular-pulse signal
that is used exclusively to calibrate a test probe
(0.5 Vpp/1 kHz)
(36) Earth connection:
This earth connection provides a ground
reference for separate earth conductors.
2.2 Basic settings
2.2.1 Default settings of switches and knobs
(controls)
a) Before switching on the appliance, all the
switches and knobs must be set to their basic
positions:
b) Connect the power cord to the mains socket
(7). It is crucial to make sure that the cord is
properly plugged in and that the voltage sel-
ector switch has been correctly set (jumper
plug: note the direction of arrow and the
chart alongside it).
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