Overview Of The Controls - Hameg HM400 Handbuch

O v e r v i e w o f t h e c o n t r o l s

Overview of the controls

1
POWER (button)
Mains on/off
2
ADJUST „-" (button)
Allows to change diverse settings(- = reduction) depending on
the selection with the button SELECT (7)
3
ADJUST „+" (button)
Allows to change diverse settings(+ = increase) depending on
the selection with the button SELECT
4
INTENS (LED)
The LED will light up if intensity adjustment was selected with
7
the button SELECT
5
FOCUS (LED)
The LED will light up if focus adjustment was selected with the
7
button SELECT
6
TRACE (LED)
The LED will light up if trace rotation adjustment was selected
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with the button SELECT
7
SELECT (button)
Allows to change some settings relating to the crt like intensity,
focus, trace rotation by pressing the buttons ADJUST
when the respective LED lights up.
8
POSITION 1 (knob)
Changes the trace position of channel 1
9
SAVE/RECALL (LED button)
In conjunction with any of the buttons
to address the settings memories
10
AUTOSET (button)
Automatically selects a reasonable instrumentsetting for most
signals
11
POSITION 2 (knob)
Changes the trace position of channel 2
12
AUTO/NORM (LED button)
Selects either automatic (AUTO) or normal (NORM) triggering.
The LED will light up if normal triggering was selected, other-
wise automatic triggering is enabled.
13
SLOPE (LED button)
Selects either the positive or the negative signal slope. The LED
will light up if the negative slope was selected.
14
TRIGGER LEVEL (knob)
Changes the trigger level of the time base.
15
TRIG'd (LED)
The LED will light up if the instrument receives a valid trigger
signal and operates in triggered mode
16
X-MAG/x 10 (LED button)
If the x 10 magnifi er is enabled, the display will be expanded
in X direction around the screen center ten times with a cor-
responding change of the time base speed. The LED will light
up if the magnifi er is active.
30 Subject to change without notice
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2 3
or
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17
X – POSITION (knob)
Changes the X position of the trace(s)
18 VOLTS/DIV (knob)
Channel 1 (CH 1) sensitivity selection. By pressing the knob,
the variable will be activated, and, as long as it is activated,
the display of the sensitivity will blink, because the sensitivity
is uncalibrated.
19
VOLTS/DIV (knob)
Channel 2 (CH 2) sensitivity selection. By pressing the knob,
the variable will be activated, and, as long as it is activated,
the display of the sensitivity will blink, because the sensitivity
is uncalibrated.
20 TIME/DIV (knob)
Selects the time base speed. By pressing the knob, the variable
will be activated, and, as long as it is activated, the display of
the time base speed will blink, because the time base speed is
uncalibrated.This knob also has a third function: hold-off time
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adjustment, see .
21
CH 1 (LED button)
Selects channel 1 as the trigger source as indicated by the LED.
22
CH 2 (LED button)
Selects channel 2 as the trigger source as indicated by the LED.
23
LINE (LED button)
Selects the mains as the trigger source as indicated by the LED.
24 EXT (LED button)
Selects the external input as the trigger source as indicated by
the LED.
25 AC (LED button)
Selects AC coupling for the trigger source as indicated by the
LED.
26 DC (LED button)
Selects DC coupling for the trigger source as indicated by the
LED.
27 LF (LED button)
Switches a low pass fi lter into the trigger channel as indicated
by the LED
28
TV (LED button)
Selects TV signal triggering as indicated by the LED.
29
DC/AC (LED button)
Selects DC or AC coupling for channel 1 (CH 1), if AC is selected,
the LED will light up.
30
GND (LED button)
Disconnects the input of channel 1 and connects it to ground
as indicated by the LED.
31
DC/AC (LED button)
Selects DC or AC coupling for channel 2 (CH 2), if AC is selected,
the LED will light up.
32 GND (LED button)
Disconnects the input of channel 2 and connects it to ground
as indicated by the LED.
33 INV (LED button)
Inverts the signal of channel 2 (CH 2) as indicated by the LED.
(Inversion of channel 1 is not available.)
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