21
Subject to change without notice
(
30) 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.
Briefly pressing the Z ON/OFF VAR (24) pushbutton
switches over the function of this socket.
TRIG. EXT:
The BNC
BNC
BNC
BNC
BNC socket serves as external trigger signal input, if
external triggering is selected.
The trigger coupling depends on the TRIG. MODE (20)
TRIG. MODE (20)
TRIG. MODE (20)
TRIG. MODE (20)
TRIG. MODE (20)
setting.
Z- Input:
If neither
“Component Tester”
, delayed time base mode
(“sea”, “del” or “dTr”) nor external trigger coupling
(“ext”)
is chosen, the socket is operative as a Z
Z
Z
Z
Z (trace
intensity modulation) input.
High TTL level (positive logic) affects blanking, low level
gives unblanking. No higher voltages than +5 Volt are
permitted.
Below the CRT are the controls for the readout, the
component tester and the squarewave calibrator
with their outputs.
(31) MAIN MENU
- READOUT Pushbutton with two functions.
Briefly pressing calls the MAIN MENU. It contains the
submenus ADJUSTMENT and SETUP & INFO partly
containing further submenus.
A menu description can be found under “E: MAIN MENU”.
Although self explanatory, a description of the menu
selection and other operating functions can be found in
this part of the manual under “B: Menu Display and
Operation”.
READOUT
pushbutton:
Pressing and holding the
READOUT
pushbutton
switches the readout on or off. With the readout
switched off, the
INTENS/FOCUS
function can
consequently not be set to
RO
.
It may be required to switch off the readout if interference
is visible on the signal(s). Such interference may also
originate from the chopper generator if the instrument is
operated in chopped DUAL
DUAL
DUAL
DUAL
DUAL mode.
(32) MEASURE SET
Pushbutton with double function.
MEASURE:
Briefly pressing calls the “AUTO MEASURE” menu, if
CURSOR lines are not activated. Otherwise the “CURSOR
MEASURE” menu is displayed. Pressing and holding the
SELECT ON/OFF (34) pushbutton activates or deactivates
the CURSOR lines.
Applicability of measuring functions
Where a measuring function is not supported in
conjunction with an operating mode, instead of a
measuring value, the READOUT indicates “n/a” (not
applicable). For example the READOUT displays “
∆
t: n/
a” if
∆
t measurement is selected in combination with
XY mode.
Controls and readout
readout, between 1:1 and 10:1. In condition 10:1, the
probe factor is thus indicated by a probe symbol
displayed by the readout in front of the channel
information (e.g.
”probe symbol”, Y1...
). In the case of
cursor voltage measurement, the probe factor is
automatically included.
Please note:
The symbol must not be activated unless a x10 (10:1)
attenuator probe is used.
(27) Ground
socket 4mm banana socket galvanically
connected to safety earth. This socket can be used as
reference potential connection for
DC
and low frequency
signal measurement purposes and in
“Component
Tester”
mode.
(28) INPUT CH II
BNC socket.
This BNC socket is the signal input for channel II. The outer
(ground) connection is galvanically connected to the instru-
ment ground and consequently to the safety earth contact
of the line/mains plug. The
AC/DC/GND
pushbutton
(29)
is assigned to the input.
In
XY
mode, signals at this input are used for the Y
deflection.
(29) AC/DC/GND x1/x10
Pushbutton with several functions.
AC/DC/GND:
Briefly pressing this pushbutton opens the input coupling
pulldown menu if a channel mode is present in which
channel II is activated.
The following input couplings are available:
AC
,
DC
and
GND
(ground). Please note “B: Menu Display and
Operation”.
After the pulldown menu has extinguished, the READOUT
displays the present input coupling at the bottom right hand
of
”Y2: deflection coefficient”
; the “
~
“ symbol indicates
AC, the “=” symbol DC and “GND” is for ground.
The
GND
setting disables the input signal and the
VOLTS/
DIV
(18)
knob. Then in automatic trigger mode (Yt) the
undeflected trace is visible representing the 0 Volt trace
position; in XY mode the Y deflection is deactivated.
x1/x10:
Probe factor selection is performed by pressing and
holding the pushbutton. This selects the indicated
deflection coefficient of channel II displayed in the
readout, between 1:1 and 10:1. In condition 10:1 the
probe factor is thus indicated by a probe symbol
displayed by the readout in front of the channel
information (e.g.
”probe symbol”, Y2...
). In the case of
cursor voltage measurement, the probe factor is
automatically included.
Please note:
The symbol must not be activated unless a x10 (10:1)
attenuator probe is used.
