Datasheet

+12 V
–12 V
6
Readings with up to 6 ½digit resolution
With a resolution of up to 6 ½digits when measuring
voltage, current and power, the R&S®NGM200 power sup-
plies are perfect for characterizing devices that have low
power consumption in standby mode and high current in
full load operation. Two voltage measurement ranges and
four ranges to measure current provide a high accuracy
and resolutions down to 1µV/10nA.
Digital voltmeter functionality
Like other power supplies, the R&S®NGM200 instruments
measure the voltage supplied to the DUT. In addition, the
R&S®NGM-K104 option activates a port that allows the in-
ternal digital voltmeter to be connected to any other point
in the customer’s circuitry. In many cases, an additional
digital multimeter is not necessary.
Galvanically isolated, floating channels
Both channels of the R&S®NGM202 are completely
isolated from each other and are not connected to chassis
ground. They can be used as independent power supplies
or be cascaded. The channels can be connected in parallel
to achieve higher currents or in series to achieve higher
voltages. Connecting the two channels makes it easy to
power bipolar circuits that might need +12V/–12V, for
example.
Output stage isolated with relays
Switching off an output channel of a standard power sup-
ply usually simply switches off the output voltage – the
output stage of the supply remains connected to the out-
put terminals. The R&S®NGM200 uses relays to isolate the
power supply circuits from the connector sockets.
Two quadrants: operates as source and sink
The two-quadrant architecture of the power supplies
allows them to function both as a source and a sink and
simulate batteries or loads. The power supply automati-
cally switches from source mode to sink mode. As soon
as the externally applied voltage exceeds the set nominal
voltage, current flows into the power supply. This is indi-
cated by a negative current reading.
Constant voltage, constant current and constant
resistance modes
Configuring and regulating the output voltage (constant
voltage mode) is the standard application for power
supplies. However, the R&S®NGM200 power supplies
can also be used in constant current mode, with each
channel separately configurable. If the configured current
level is exceeded, current limiting ensures that only the
configured current can flow. The output voltage is reduced
accordingly below the configured value. This prevents
damage to the test circuit in the event of a fault.
When operating as an electronic load, constant resistance
mode is also available. In this mode, the power supply
behaves like an adjustable resistance over the entire load
range. This makes it possible to simulate battery discharge
with a constant load resistance, for example.
Two channels can be connected together to supply bipolar circuits with, for example,
+12V/–12V.
The internal digital voltmeter of the R&S®NGM200 power supplies can
optionally be used to measure at any point in the customer’s circuitry.
NGM200_dat_en_3609-1685-32_v0100.indd 6 22.05.2019 11:54:16