One option for minimising the measuring error at high frequencies in the case of
coaxial cables is to use a volume resistor (terminator).
The impedance of this resistor, which is connected directly to the DSO input, must
match the impedance of the signal source or cable.
Example: output resistance of a frequency generator = 50 Ohm, output resistance of
the coaxial cable used = 50 Ohm, ==> resistance of the volume resistor = 50 Ohm.
To suppress any high ripple voltage share for your measurement, always connect the
earth of the circuit to be measured ("-" or housing) with the earth of the oscilloscope
(by means of a shielded cable with the BNC jack of the Y input).
Ensure that the circuits in/on which your measurements take
place are electrically isolated from the mains by an safety isolat-
ing transformer. Never connect the inputs/outputs (BNC) directly
to the mains supply using chassis (=racks) on which there could
be or circuits which are operated without transformers (electric
isolation of input and output).
Caution! Danger to life in case of contact!
Never exceed the max. input volume as any damage to the mea-
suring instrument could mean danger to life for you!
Calibration connection (A)
On the calibration connection (CAL (A)) the DSO enables the calibration of a
probe head.
This is necessary if a duty cycle of 10:1 has been selected.
This calibration connection provides a square signal with a frequency of 1 kHz and
amplitude of 2Vpp.
36
• the device shows visible signs of damage
• the device no longer functions and
• has been stored for longer periods under unfavourable conditions or
• has been subjected to considerable stress in transit.
Also observe the safety instructions in the individual sections of these operating
instructions as well as in the operating instructions of the connected devices.
Table of Contents
Introduction ..............................................................................................................22
Intended use ............................................................................................................22
Safety instructions ....................................................................................................23
Table of Contents......................................................................................................25
Scope of delivery ......................................................................................................25
Installation ................................................................................................................27
Hardware connection ............................................................................................27
Commissioning ........................................................................................................27
DSO operation ..........................................................................................................28
FFT operation ............................................................................................................34
Elimination of disturbances ......................................................................................37
Servicing....................................................................................................................38
Technical data / specifications..................................................................................38
Scope of delivery
DSO oscilloscope attachment
USB connecting cable
DSO software CD
Operating instructions
25