Chapter II
16
30 MHz
oscilloscope
3.
STARTUP
•
Set the eight control potentiometers as shown on previous page.
•
Push in the POWER key (30): the most recent memorized configuration will be restored.
•
Apply a signal to the CH1 (26) or CH2 (23) BNC input plug.
4.
FUNCTIONAL DESCRIPTION
4.1.
AUTOSET
•
AUTOSET/ABORT light On: when the User presses on the AUTOSET key (4), the oscilloscope
searches for the vertical sensitivity, the horizontal sweep speed and trigger conditions that will
display the signals present at the CH1 and CH2 inputs.
NOTE: If there is no signal, the oscilloscope will keep the ranges indicated by the manual
vertical sensitivity switches (5) - (11) and the timebase switch (15).
•
AUTOSET/ABORT indicator flashes: the AUTOSET light flashes if the ranges found by
AUTOSET are not the same as the ranges indicated by the sensitivity and timebase switches.
The ranges found by AUTOSET can be found by turning switches (5) (11) and (15) in the
direction shown by the corresponding blue arrows closest to the two illuminated coupling or
source lights. The corresponding two lights go OFF when the manual sensitivity or timebase
switch changes to the position found by AUTOSET. The AUTOSET/ABORT light goes OFF
when all AUTOSET positions have been found.
•
ABORT: The result of AUTOSET can be canceled by pressing on the AUTOSET/ABORT key
(4) again.
•
Other functions modified by the AUTOSET function:
AC coupling for active channels, otherwise coupling unchanged
-CH2 never changed
AUTO trigger imposed
x10 invalid
DC source coupling
4.2.
Vertical channel
(6) - (10)
POSITION Vertical framing of traces plus horizontal framing in XY for
POSITION (6)
(8)
POSITION Horizontal framing of traces
(5) - (11)
VOLT/DIV Vertical sensitivity / start the channel:
12 positions (5 mV to 20 V/div.).
CH1 OFF position: channel CH1 is not displayed.
CH2 OFF position: channel CH2 is not displayed.
(22) - (28) VAR
Continuous adjustment of vertical sensitivity. When the button is
locked at the left stop, the corresponding channel is calibrated.
Decalibration is signaled by the active coupling light flashing.
(24) - (27) AC DC GND Intermittent press: Selection of input coupling
Display the AC component (eliminate the DC component).
Display the complete signal (0 to 30 MHz).
Display the zero volt reference for the channel (without short circuiting
the input signal). Enables precise positioning of the trace on the screen
using the POSITION controls (6) and (10).
Continuous press: display the 0 V reference, coupling unchanged.
(23) - (26) CH1 CH2
Input signals to be observed on BNC connectors.
AC DC GND
AC DC GND
AC DC GND
