Subject to change without notice
12
Even if alternating time base mode or B time base mode
was active before, the instrument is switched automatically
to A time base mode.
Please note “AUTOSET”
.
Automatic CURSOR supported voltage measurement. If
CURSOR voltage measurement is present, the CURSOR
lines are automatically set to the positive and negative peak
value of the signal. The accuracy of this function decreases
with higher frequencies and is also influenced by the signal‘s
pulse duty factor.
In DUAL mode the CURSOR lines are related to the signal
which is used for internal triggering. If the signal height is
insufficient, the CURSOR lines do not change.
(3) RM
The remote control mode can be switched on or off via the
RS232 interface. In the latter case the
“RM” LED
is lit and
the electronically selectable controls on front panel are
inactive. This state can be left by depressing the
AUTOSET
pushbutton provided it was not deactivated via the interface.
(4) INTENS - READOUT
Knob with associated pushbutton and LEDs.
This control knob is for adjusting the A and B traces and
readout intensity. Turning this knob clockwise increases and
turning it counterclockwise decreases the intensity.
The
READOUT
pushbutton below is for selecting the function
in two ways.
Depending on the actual time base mode and with the
readout
(RO)
not switched off, briefly pressing the
READOUT
pushbutton switches over the
INTENS
knob function
indicated by a LED in the sequences:
A - RO - A in condition A time base,
A - RO - B - A if alternate time base mode is present and
B - RO - B in condition B time base.
XY mode:
A - RO - A.
Component Test: A - RO - A.
Pressing and holding the
READOUT
pushbutton switches
the readout on or off. In readout off condition the
INTENS
knob function can consequently not be set to
RO
. Briefly
pressing the pushbutton causes the following sequences:
condition
sequence
A time base
A - A
Alternate A/B
A - B - A
B time base
B - B
XY mode
A - A
Component Test
A - A
Switching the readout off, may be required 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
mode. All INTENS-settings are stored after
the instrument is switched off.
The
AUTOSET
function switches the readout on and selects
A time base mode (A-LED lit). The
INTENS
setting for each
function is automatically set to the mean value, if less
intensity was previously selected.
(5) TR
The trace rotation control can be adjusted with a small
screwdriver (
please note “trace rotation TR”
)
(6) FOCUS
This control knob effects both the trace and the readout
sharpness.
(7) SAVE / RECALL
The instrument contains 9 non volatile memories. These can
be used by the operator to save instrument settings and to
recall them. This relates to all controls which are electronically
selected.
Press the
SAVE
pushbutton briefly to start the save
procedure. The readout then indicates the letter
“S”
followed
by a cipher between 1 and 9, indicating the memory location.
If the instrument settings stored in this memory location
must not be overwritten, briefly press the
SAVE
or the
RECALL
pushbutton to select another memory location. Each
time the
SAVE
pushbutton is briefly pressed the memory
location cipher increases until the location number 9 is
reached. The
RECALL
pushbutton function is similar but
decreases the memory location cipher until 1 is reached.
Press and hold
SAVE
for approx. 3 seconds to write the
instruments settings in the memory and to switch the
associated readout information (e.g. “S8”) off.
To recall a front panel setup, start that procedure by briefly
pressing the
RECALL
pushbutton. The readout then indicates
the letter
“R”
and the memory location number. If required,
select a different memory location as described above. Recall
the settings by pressing and holding the RECALL pushbutton
for approx. 3 seconds.
If the
SAVE
or the
RECALL
pushbutton was depressed
inadvertently, briefly press both pushbuttons at the same
time or wait approx. 10 seconds without pressing either
pushbutton to exit that function.
Switching the instrument off results in an automatic SAVE
procedure of the present settings in memory location 9 and
overwrites the data in that location. If the instrument settings
in memory location 9 are of importance, RECALL 9 before
switching the instrument off.
Attention:
Make sure that the signal to be displayed is similar to the
one that was present when the settings were stored. If
the signal is different (frequency, amplitude) to the one
during storage then a distorted display may result.
The setting controls and LED’s for the Y amplifiers, modes,
triggering and time bases are located underneath the sector of
the front panel described before (Responding picture see next
page).
(8) TRS
– Pushbutton wit associated LED.
The instrument contains a trace separation function which
is required in the alternate time base mode to separate the
B time base trace from the A time base in Y direction.
Controls and Readout
AUTOSET
TR
B
RM
READ
OUT
200 MHz
ANALOG OSCILLOSCOPE
HM2005
Instruments
!
POWER
INTENS
EXIT
SAVE
SET
1
FOCUS
9
RECALL
A
RO
2
1
3
4
5
6
7
