Instruction manual

Subject to change without notice
24
(~ symbol) to DC (= symbol) input coupling and vice ver-
sa, if the INPUT CHII (36) is not switched to GD (38).
The AC/DC setting is displayed in the readout with the
deflection coefficient.
Probe factor:
Pressing and holding the pushbutton selects the indi-
cated deflection coefficient of channel I displayed in the
readout, between 1:1 and 10:1. In condition 10:1 the
probe factor is thus indicated by a probe symbol dis-
played by the readout in front the channel information
(e.g. ”probe symbol”, Y2...). In the case of cursor
voltage measurement, the probe factor is automatically
included.
Please note:
The probe symbol should not be activated unless
a x10 (10:1) attenuator probe is used.
(38) GD
INV. - Pushbutton with two functions.
GD
Each time this pushbutton is pressed briefly, the INPUT
CHII is switched from active to inactive and vice versa.
It is displayed in the readout as an earth (ground) symbol
instead of the deflection coefficient and the ~ (AC) or =
(DC) symbol.
The GD setting disables the input signal, the AC/DC
(37) input coupling selection and the VOLTS/DIV (25)
knob. In automatic trigger mode the undeflected trace
is visible representing the ”0 Volt” trace position. See
Y-POS. II (15).
INV.
STORAGE MODE
Pressing and holding this pushbutton switches the chan-
nel II invert (INV.) function on or off. The invert ”on”
condition is indicated by the readout with a horizontal
bar above ”Y2” (Yt mode) or ”X” (XY mode). The invert
function causes the signal display of channel I to be
inverted by 180°.
ANALOG MODE
The invert function is not available in XY mode.
(39) TRIG. EXT. – BNC socket.
This BNC socket is the external trigger signal input.
Briefly pressing the TRIG. (24) pushbutton (until the
information “TR:EXT, slope, coupling” is visible in the
readout and the EXT-LED is lit) switches the input active.
The trigger coupling depends on the TRIG. MODE (27)
setting. If external triggering is active line/mains (~)
triggering is not available
The outer (ground) connection is galvanically connected
to the instrument ground and consequently to the safety
earth contact of the line/mains plug.
Below the CRT there are the controls for the readout,
the component tester and the square wave calibrator
with their outputs.
Please note:
The following description of the cursor related controls
assumes that the readout is visible and component
test is inactive.
(40) PRINT / MENU - Pushbutton with 2 functions.
STORAGE MODE ONLY
PRINT
Briefly pressing the pushbutton starts a document
(hardcopy) if the following preconditions are met:
1.The oscilloscope must be connected to the external
B&K interface HO79-6.
2.The software version installed in HO79-6 should not
be < V2.00.
The device used for documentation (e.g. printer, plotter)
must be connected with one of the HO79-6 ports. The
document includes the signal display, the graticule,
the measurement parameters and additional information
such as oscilloscope type and HO79-6 software version.
The PRINT function replaces the actuation of the HO79-
6 ”START” pushbutton, which may not be accessible
(e.g. rack mount).
For further information please note the HO79-6 manual.
ANALOG and DIGITAL MODE
MENU
Pressing and holding the pushbutton activates the display
of the MAIN MENU. It contains the submenus SETUP,
CALIBRATE and HO79 if connected.
Once a menu is displayed, the following pushbuttons
are of importance:
1.SAVE and RECALL (12) pushbutton.
Briefly pressing save or recall selects the submenu or
an item within the submenu.
2.SAVE (12) pushbutton SET function.
Pressing and holding the SAVE (12) pushbutton calls
(sets) the menu or the previously selected item. In
those cases where the item is marked with ON / OFF
the setting changes from ON to OFF or vice versa.
In some cases the called function is not performed at
once and a warning is displayed to protect from calling
the function inadvertently. Then the function can be
called by pressing and holding the SAVE pushbutton
(SET function) again, otherwise if the function is
called inadvertently the proceeding can be cancelled
by pressing the AUTOSET (2) pushbutton.
3.AUTOSET (2) pushbutton.
Each time the AUTOSET pushbutton is pressed the
menu is switched back one step until MAIN MENU is
displayed. Then pressing the AUTOSET pushbutton
again switches the menu operation off and the
AUTOSET is automatically set to the normal function.
(41) ON/OFF –
CHI/II –
1/
∆∆
∆∆
∆ t - Pushbutton with several functions.
Controls and Readout
BK Precision