R&S NGM202, User Manual

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Operating Basics
R&S
®
NGL200/NGM200
39 User Manual 1178.8736.02 ─ 06
between CV and CC depending on the connected load. When CR is configured , the
instrument is not switched to CR mode automatically, it will operate in CR mode when
sinking but source in CV or CC mode.
CV mode
Figure 5-12 shows that if the instrument is in the range of voltage regulation, the output
voltage V
out
remains constant while the current may increase to its maximum value I
max
when the connected load is increasing. In CV mode, the font text in the channel display
area changes to green.
See Figure 5-3 .
Figure 5-12: Current limit
CC mode
The current I
max
corresponds to the current setting adjustable in the instrument.
If I
out
reaches I
max
, the instrument switches to CC mode, i.e. the output current remains
constant and limited to I
max
even if the load increases. Instead, the output voltage V
out
decreases to almost zero with a short circuit. In CC mode, the font text in the channel
display area changes to red.
See Figure 5-3 .
CR mode
To go into CR mode, the R&S NGL/NGM must operate in sink mode where current
flows into the instrument and "Constant Resistance" is enabled.
With "Constant Resistance" enabled and configured, the R&S NGL/NGM can set the
resistance in sink mode, this allows the R&S NGL/NGM to behave like an electronic
load which is useful in battery test application.
In CR mode, the font text in the channel display area changes to cyan.
See Figure 5-3 .
Operation Modes