First Time Operation; Supported Signal Waveforms With Parameter Inputs; Pulse Frequency; Quick Introduction - Hameg HMF2550 Handbuch

O p e r a t i o n o f t h e H M F 2 5 2 5 / H M F 2 5 5 0
4 Operation of the HMF2525 / HMF2550
4.1

First time operation

Prior to the first time operation please note and observe the
safety instructions given before!
4.2 Switching on
Turn the instrument on by pushing the POWER button
turn-on of the HMF2550 / HMF2525 the display will first show
the type of instrument The instrument will resume the opera-
tional settings which were active before turn-off. All settings
are stored in a nonvolatile memory and are recalled when the
instrument is switched on. However, the output signal (OUTPUT),
the BURST mode, the SWEEP function, the OFFSET and INVERT
functions will always be deactivated upon turn-on.
Factory settings
Waveform: Sinus
Frequency: 50 kHz
Amplitude: 1.000 V
Pulse width: 10 µs
Offset: 0 mV
Sweep time: 10 s
Sweep start frequency: 1 kHz
Sweep stop frequency: 100 kHz
4.3 Supported signal waveforms with parameter
inputs
The HMF2550 / HMF2525 offers five different waveforms with
a wide selection of parameters:
(all values in parenthesis [ ] are valid for the HMF2525)
1. Sine
Frequency 0.01 mHz ... 50 MHz [25 MHz]
Period 20 ns [40ns]...100000 s
Amplitude 0.010V ... 20V (high impedance)
High Level -10 V ... +10 V
Offset -10V ... +10 V
Low Level -10 V ... +10 V
2. Square
Frequency 0.01 mHz ... 50 MHz [25 MHz]
Period 20 ns [40ns] ... 100000 s
Amplitude 0.010 V ... 20 V (high impedance)
High Level -10 V ... +10 V
Offset -10 V ... +10 V
Low Level -10 V ... +10 V
Duty Cycle 20 % ... 80 %
3. Triangle
Frequency 0.01 mHz ... 10 MHz [5 MHz]
Period 100 ns ... 100000 s
Amplitude 0.010 V ... 20 V (high impedance)
High Level -10 V ... +10 V
Offset -10 V ... +10 V
Low Level -10 V ... +10 V
Symmetry 0 % ... 100 %
Rise time*): 8 ns ...100000 s
Fall time*): 8 ns ...100000 s
*) dependant on adjusted periodic time
**) dependant on adjusted frequency/periodic time
32
Subject to change without notice
. Upon
1
at a HIGH Z load
ss
4. Pulse
Frequency 0.10 mHz ... 25 MHz [12.5 MHz]
Period 40 ns [80 ns] ... 10000 s
Amplitude 0.010 V ... 20 V (high impedance)
High Level -10 V ... +10 V
Offset -10 V ... +10 V
Low Level -10 V ... +10 V
Duty Cycle**) 0.01% ... 99.99%
Edge Time 8 ns ... 500 ns
5. Arbitrary
Frequency 0.01 mHz ... 25 MHz [12.5 MHz]
Period 40 ns [80 ns] ... 100000 s
Amplitude 0.010 V ... 20 V (high impedance)
High Level -10 V ... +10 V
Offset -10 V ... +10 V
Low Level -10 V ... +10 V
4.4

Quick introduction

First select the desired basic waveform (sine, square etc.) by
pushing the respective key. In order to edit the parameters
of the waveform selected choose from the soft keys
right of the function generator display. If the soft key is active,
the button is blue highlighted. Has a soft key several functions,
these can be selected by pressing again. The active function is
shown with blue text.

Fig. 4.1: Panel key's for chosing basic waveforms

The signal parameters can be set either directly via the numeri-
cal keyboard and with the knob
4
select the decimal position which is to be changed. Turning the
knob CW will increase the value, turning it CCW will decrease it.
The unit is selected with the unit keys of the keyboard. Wrong
inputs (e.g. illegal frequency range) will be indicated by an
acoustical warning signal and will not be accepted. The display
will show a red error field. Wrong inputs (e.g. illegal frequency
range) will indicate an automatically jump to the minimum or
maximum value of the selected function. With the left arrow
button you can jump back to the last menu.
If you hold the ESC key (
window vanishes at any false entry via the key-
board.

Fig. 4.2: numeric keypad and key's for unit's and escape

It is possible to use the knob
the knob will activate the cursor in the display, the soft keys
are thus deactivated. The desired position is selected by
3
turning the knob CW resp. CCW. The parameter selected can
the set after pushing the knob. The value set will be accepted
by pushing the knob again.
to the
3
. The latter are also used to
10
button), the value input
for all settings only. Pushing
10