Function Menu And Function Pushbuttons; Frequency; Amplitude; Selection Of Offset Voltage - Hameg HM 8131-2 Manual

Function menu and function pushbuttons

5.2 Function menu and function
pushbuttons
The set of function pushbuttons
[FREQ], amplitude [AMPL], Sweep [SWP], and offset [OFFS] by
pushing the appropriate button. Repeated pushing a button will
cause leaving the function menu. Parameters are entered by the
procedure described in chapter 4.2 "How to enter parameters."
STOP
1. While in any of the menus FREQ, AMPL, OFFS pushing
the button [MENU]
2. Pushing any of the function pushbuttons while in
another menu this menu will be left and the function
TiPP called.
Exit from the menu SWP is only possible by pressing
the [SWP] button again.

Frequency

STOP
[FREQ] (Frequenz)
Fr. 1.0000000 kHz
- val + < cur >
After pressing the button [FREQ] the signal frequency can be
selected via the keyboard or the knob.

Amplitude

[AMPL] (Amplidude)
Ampl. 10.00 Vpp
- val + < cur >
After pressing the button [AMPL] the signal amplitude can be
selected via the keyboard or the knob. The amplitude indicated on
the display is valid only for no load on the output; if a 50 ohm load
is connected the actual amplitude will be half of the displayed
value!
The amplitude can be entered either as a peak-to-peak value in
Vpp or as a rms value in Vrms, selectable by the button pp/rms of
the keyboard. Please note that an indication of V
be valid for arbitrary functions, also, any offset superposed will
not be included.
If a 50 ohm load is connected the actual amplitude
will be half of the displayed value!
STOP
In case there is no load on the output or a load diferring
STOP
from 50 ohms it is advisable to check the amplitude with
a HAMEG scope.
TiPP
In the function amplitude modulation the maximum
voltage levels in the various ranges are cut in half,
the maximum output voltage is limited to 10 V
58
STOP
“
allows to select frequency,
“
will cause a jump to main menu 1.
Ampl. 5.00 Vrms
- val + < cur >
or V
pp rms
.
pp
The output voltage has 3 ranges:
full range
range 1 20,0 mV
range 2 201 mV
range 3 2,01 V
The output stage limits the available output voltage
to 20 V
output voltages are: 10.00 Vp, 1.000 Vp, 100.0 mVp according
to range.
STOP

Selection of offset voltage

[OFFS] (Offset)
Offset: 1.00
- val + < cur >
A positive or negative offset can be added to the output signal
using the button [OFFS]. The value is selected as described for
the amplitude via the keyboard
no load output offset voltage is ±5 V in range 3; the maximum
voltages in the other ranges are scaled accordingly.
’
The LED will indicate the presence of an offset on the output.
Maximum offset voltage
The maximum offset voltage is limited according to the range
selected, e.g. it is not possible to select a 5 V offset and a 20 mV
signal voltage. Within a range the offset is continuously variable
from minus maximum to plus maximum, however, values below
10 mV can not be chosen.
Range 1: 20.0 mVpp – 200 mVpp maximum offset ± 50 mV
Range 2: 201 mVpp – 2000 mVpp maximum offset ± 500 mV
STOP
Range 3: 2.01 Vpp – 20.0 Vpp
The sum of signal and offset voltages is limited to the
maximum output voltage (no load) of 20.00 V
TiPP V – 200.0 mVpp in the 3 ranges
pp
will not
half range
– 200 mV 10,0 mV
pp pp
– 2000 mV 101 mV
pp pp
– 20,00 V 1,01 V
pp pp
. With offset added the maximum available
pp
V
•
or the knob
maximum offset ± 5 V
Subject to change without notice
– 100,0 mV
pp pp
– 1000 mV
pp pp
– 10,00 V
pp pp
”
. The maximum
– 2.000
pp