Description
Rohde and Schwarz NGU201COM – Two-Quadrant Source Measure Unit with K103, K104 and K106 Options

- Two quadrant source measure unit
- Catalog number 3639.3763P98
- This version includes three options – NGU-K103, NGU-K104 and NGU-K106
- NGU-K103 – Digital I/O ports
- NGU-K104 – Digital voltmeter functionality
- NGU-K106 – Battery simulation
NGU series overview
A source measure unit (SMU) is an electronic instrument that is capable of both sourcing and measuring voltage and/or current at the same time with high precision. They typically provide source and sink capabilities (two-quadrant), some of them even span voltage and current across both positive and negative values (four-quadrant).
The R&S NGU series consists of the following:
- NGU201 two-quadrant source measure unit, a new member in the family of wireless communications test instruments
- NGU401 four-quadrant source measure unit, the semiconductor testing specialist
| NGU201 | NGU401 | |
| Quadrants | 2 | 4 |
| Output voltage | 0 V to 20 V | -20 V to +20 V |
| Max. output/sink power | 60 W | |
| Max. output/sink current | ≤ 6 V: 8 A; > 6 V: 3 A | |
| Load recovery time | < 30 µs | |
| Max. acquisition rate | 500 ksample/s | |
NGU201 – Two Quadrant SMU
Two quadrants: operates as source and sink
The two-quadrant architecture of this source measure unit allows it to function both as a source and a sink and simulate batteries or loads. The source measure unit automatically switches from source mode to sink mode. As soon as the externally applied voltage exceeds the set nominal voltage, current flows into the instrument. This is indicated by a negative current reading.


Readings with up to 6.5 digit resolution
With six measurement ranges for current and a resolution of up to 6.5 digits when measuring voltage, current and power, the R&S NGU source measure units are perfect for characterizing devices that go from extremely low power consumption to high currents in the ampere range. Using ammeters with feedback-amplifier technology improves accuracy and increases the sensitivity down to the nA range.
Battery simulation option
The discharging behavior of the battery type needs to be considered to optimize the lifecycle of battery-operated devices. The NGU-K106 battery simulation option allows the real battery output performance to be simulated. Testing can be based on a selected battery model, and battery capacity, SoC and Voc can be set to any state to test the device under specific circumstances.

Variable output impedance and constant resistance mode
A power supply should have an output impedance as low as possible to suppress loading effects on the DUT. However, there are applications where certain battery types need to be simulated in a controlled manner or where it is necessary to simulate the increase in internal impedance as the battery discharges. The R&S NGU201 source measure unit supports these applications, thanks to its adjustable output impedance range.
The output impedance is regulated very fast. Especially in the range from –50 mΩ to 2 Ω, recovery times of < 200 µs can be achieved.
When operating as an electronic load, constant resistance mode is also available. In this mode, the instrument 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.
Digital voltmeter (DVM) option
While the R&S NGU201 source measure unit measures the voltage supplied to the DUT, the NGU-K104 option activates a port that allows an additional internal DVM function to be connected to any other point in the circuitry. This DVM function runs in parallel to the readback function, and is galvanically separated from the channel circuitry. In many cases, an additional digital multimeter is not necessary.
Several models available
The Rohde and Schwarz NGU series is available in several variations of both two and four quadrant models. The following chart provides a brief overview of part numbers and the main differences.
| Model | Catalog | Description |
| NGU201 | 3639.3763.02 | Two quadrant SMU |
| NGU201-G | 3639.3763P22 | NGU201 with GPIB |
| NGU201COM | 3639.3763P98 | NGU201 with options K103, K104 and K106 |
| NGU204 | 3639.3763.03 | Four-Quadrant SMU |
| NGU204-G | 3639.3763P23 | NGU401 with GPIB |
| NGU204COM | 3639.3763P99 | NGU401 with option K103 |
There are also several options for this series:
- NGU-K103 – Digital I/O ports
- NGU-K104 – Digital voltage meter functionality (only for NGU201)
- NGU-K105 – IEEE-488 (GPIB) interface
- NGU-K106 – Battery Simulation (only for NGU201)
Switch and Semiconductor Test Systems/Source Measure Unit / SMU Template | |
|---|---|
| Number of Quadrants | Two |
| Number of Channels (SMU) | One |
| Max Current Source/Measure Range (SMU) | 8 A |
| Max Voltage Source/Measure Range | 20 V |
| Maximum Output Power | 60 Watts |
Product General Attributes | |
| Unique Features | Includes additional options: NGU-K103 – Digital I/O ports NGU-K104 – Digital voltmeter functionality NGU-K106 – Battery simulation |
| Shipping Weight | 18 LBS |
| HTS/Schedule B Number | 8504409580 |
| ECCN Number | 3A992 |
| Country of Origin | Czech Republic |









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