2 pulse types – Multichannel Systems STG1000 Manual User Manual
Page 18
Stimulus Generator 1000 Series User Manual
12
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