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. / INPUT (Z)
- BNC socket with two functions.
The outer (ground) connection is galvanically connected
to the instrument ground and consequently to the safety
earth contact of the line/mains plug. The input impedance
is approx. 1M Ohm II 20pF.
TRIG. EXT.
This BNC socket is the external trigger signal input, if
external triggering is selected. Briefly pressing the
TRIG.
(
24
)
pushbutton, until the
TRIG. „EXT“ -LED
(
24
)
is lit,
switches the external trigger input active.
The trigger coupling depends on the
TRIG. MODE
(
27
)
setting.
ANALOG MODE ONLY
Z-Input
If neither
COMPONENT TEST
nor external trigger
coupling
(TRIG. EXT.)
is chosen, the socket is operative
as a
Z
(trace intensity modulation)
input.
High TTL level
(positive logic) effects blanking, low level
gives unblanking. No higher voltages than +5 Volt are
permitted.
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 documentation
(hardcopy) if the following preconditions are met:
1.The oscilloscope must be connected to the external
HAMEG
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
documentation includes the signal display, the graticule,
the measurement parameters and additional information
such as oscilloscope type and
HO79-6
software version.
The
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 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 was
Controls and Readout
