Hameg HMO Series, Manual

Page: 20 / 64

20
Subject to change without notice
A q u i c k i n t r o d u c t i o n
4 Vertical system
For the vertical settings there are
the knobs for the vertical position
and the sensitivity, an always
visible short menu and an exten -
ded menu.
Fig. 4.1: Front panel area with vertical
system controls
By pushing the respective key the channel will be selected for
which these controls will be activated, this will be indicated by
the key lighting up in the color of the channel. Additionally, the
channel number on the screen will be framed and displayed
lighter than the channels not activated. The appropriate short
menu is always visible, the extended menu will be shown upon
pushing the key MENU
21
.
Fig. 4.2: Short menu for the vertical settings
4.1 Coupling
The first item to be selected is the input impedance: 1 MΩ or
50 Ω. (only at the HMO152x and HMO202x, the HMO72x and 102x
does not offer 50 Ω inputs)
Do not connect the 50 Ω inputs to effective voltage
higher than 5 volts!
The 50 Ω input impedance should only be selected if the signal
source is 50 Ω, such as a generator with a 50 Ω output where
the termination within the scope is to be used. In all other
cases 1 MΩ is to be selected. Next DC or AC coupling has to be
selected: with DC coupling all components of the signal will be
displayed, with AC coupling the DC content will be removed,
the lower bandwidth is 2 Hz. Up to 200 V
rms
may be applied
directly to the vertical inputs if 1 MΩ is selected. Higher vol-
tages can be measured with probes (up to 40 kV
p
). For general
applications the probes supplied with the instrument will be
used. They are specified for the 1 MΩ input. With the HMO72x
and HMO102x are the Hz154 delivered, which offer a 10:1 /
1:1 switchable attenuation. Therefore the attenuation setting
18
B
19
20
22
23
24
21
25
26
27
must be done manually in the channel menu. The HMO152x
and HMO202x are delivered with the HZO10 a 10:1 probe with
automatic attenuation read out, which will be read from the
probe and factored in.
The passive probes must be adjusted to the inputs
to which they are connected. See the probe manual
for the adjustment procedure. The PROBE ADJUST
output is only usable for 1:1 and 10:1 probes, for
100:1 or 1000:1 probes special external generators
with a perfect step response have to be used. Please
use the shortest possible ground connection.
HMO
Ar
t.-Nr
. xx1
320 + xx1
340 - HIN
T - Stand: 31
.0
1.20
11
HMO
Ar
t.-Nr
.: xx1
320 + xx1
340 - DKL - Stand: 31
.0
1.20
11
HORIZONTAL TRIGGER
CURSOR/MENU ANALYZE GENERAL
TRIG’d SLOPE
ANALYZE GENERAL
TRIG’d SLOPE
LEVEL
MEM
O
R
Y
HORIZONTAL TRIGGER
TRIG’d SLOPE
LEVEL
MEM
O
R
Y
VOLTS/DIV TIME/DIV
POSITION POSITION
SELECT WINDOW
COARSE/FINE
VOLTS/DIV TIME/DIV
POSITION POSITION
SELECT WINDOW
COARSE/FINE
PASS/FAIL PASS/FAIL
VERTICAL VERTICAL
USB STICK REM CH 1 CH 2 CH 3 CH 4
ADJ.
Bus Signal
Source
S1 S2 S3
COMPONENT TESTER
(CT)
LOGIC CHANNEL POD (7...0)
Use recommended probe only!
! !
max.
10 V
p
62-K304-134
0 1
.0
62-K304-134
0 1
.0
50 Ω
5 V
rms
1 MΩ II 14 pF
max.
200 V
p
1 MΩ II 14 pF
max.
200 V
p
!
HMO1
524 + 2024 -
TXT SW - Stand: 31
.0
1.20
11
62-K304-1340 -
1.
0
SELECT SELECT
CURSOR/MENU
MENU
COARSE
FINE
KEYPAD
AUTO
MEASURE
SCROLL
BAR
CURSOR
MEASURE
FFT
QUICK
VIEW
DISPLAY
AUTO
SET
CH1
CH2
CH3
POD
AUTO
NORM
X Y
CT
MENU
TYPE
SOURCE FILTER
SLOPE
ACQUIRE
SINGLE
RUN
STOP
SET
CLR
SETUP HELP
SAVE
RECALL
INTENS
PERSIST
REF
BUS
FILE
PRINT
CH4
MATH
Fig. 4.3: Correct connection of the probe to
the probe adjust output
The coupling is selected in the short menu: by just pushing the
appropriate key the coupling is chosen, also the signal may be
inverted. The menu is valid for the activated channel as indicated
by the channel key light up. The channel number will be shown
in the top of the menu. By pushing the respective key of another
channel the menu will transfer to this channel.
4.2 Sensitivity, Y-Positioning, and Offset
The sensitivity of the analog inputs can be selected with the large
knob in the VERTICAL section of the front panel in 1-2-5 steps
from 1 mV/div to the respective maximal setting independent of
the 50 Ω (only available at the HMO152x and HMO202x) or 1 MΩ
selection. The knob is associated with the channel selected by
pushing the respective key. The sensitivity can be changed to
continuous control by pushing the knob once. The smaller one
of the knobs is used for vertical positioning.
Fig. 4.4: Vertical offset in the extended menu
By pushing the MENU key the extended menu is called. On
page 2 of this menu at the HMO152x and HMO202x a DC offset