Manual

Stimulus Generator 1000 Series User Manual

5.2 Pulse Types

Three basic pulse types are available in MC_Stimulus. You can create virtually any pulse by

combining different types.

• Rectangular

• Ramp

• Sine wave

Note: The time resolution is 20 μs. When you enter time steps that are not a multiple of 20 μs,

the length of the step is internally adjusted to a valid value. The changed values do not show up

in the worksheet, but invalid values are highlighted in yellow or red. The minimum voltage

resolution is 2 mV, the current resolution is 1 μA. Please regard also the minimum and

maximum output voltage/current of your STG version.

Note: If you work near the resolution limits of the STG, the output pulses may differ from the

programmed pulses. In this case, you should check the output with an oscilloscope. Please see

also the "Analog Output Signals" chapter.

Note: The total pulse length of all channels has to be identical. If the stimuli of two channels

have different lengths of time, the last used value of the shorter channel is kept until the longest

stimulus has been finished. You will be notified with an error message at the beginning of the

download.

Please note that the memory of the STG is limited. You will get an error message if the memory is

full. The new generation of stimulus generators (STG2004/8) has 16 times more memory and an

improved internal memory management, perfect for sophisticated or long-term stimulus

protocols.

For the digital Sync channel, only bit patterns of 0 (LOW) and 1 (HIGH) can be programmed. A

logical state of 1 (HIGH) results in a 5 V output signal, and a logical state of 0 (LOW) results in a 0

V output. Please note that the digital output is sent about 20 μs faster than the analog output.

Please see also the "Triggering Stimulation" chapter.

Rectangular pulse type