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Getting Started
R&S
®
NGL200/NGM200
26User Manual 1178.8736.02 ─ 09
Source and sink current
The R&S NGL/NGM power supply series are 2 quadrant power supplies which may
both source and sink current. When the voltage across the output terminal exceeds the
set voltage, current flows into the instrument. The default behavior "Auto" can be con-
figured in output menu, see
Chapter 6.2.3.4, "Output Mode", on page 51.
On the display, sink mode is shown as negative current. See also "CR mode"
on page 26.
4.3.1 Setting the Output Voltage and Current
1. Press [Home] key.
The R&S NGL/NGM displays the home window.
2. Select voltage or current parameter in the home window.
The R&S NGL/NGM displays an on-screen keypad to set the value.
3. Enter the required value.
4. Confirm value with the unit key (V/mV or A/mA).
See
"Source and sink current" on page 26 for more information on the operating
modes supported in different models.
4.3.2 Activating the Channels Output
The output voltages can be switched on or off regardless of the instrument's operating
mode.
To switch on or off channel output.
1. For the two-channel models, select desired channel key ([Ch1] or [Ch2]) on the
front panel.
2. Press [Output] key.
The R&S NGL/NGM outputs the set voltage level on the output channel terminal.
Depending on the operating mode which the channels are operated in, the following
are observed:
CR mode
CR mode is a special case of sink mode in which the instrument behaves like a con-
stant resistor. Only in this mode, the respective channel keys and display font color in
the home window turns cyan.
In "normal" sink mode, the colors are the same as in source mode: green if the current
flowing into the R&S NGL/NGM is below the set current and red if the current is limited
to the set value. The only visible indication of sink mode is the change of sign of the
current readout to "Minus".
Trying Out the Instrument
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