The Rohde & Schwarz NRT is a directional power meter base unit designed to measure forward power and reflection under operational conditions. Connected between source and load, it provides simultaneous monitoring of power flow in both directions for installation, maintenance, and testing applications. With support for R&S NRT-Z and NAP-Z intelligent sensors, the NRT features advanced measurement functions including average power, peak envelope power, crest factor, and complementary cumulative distribution function (CCDF) across various digital modulation standards.
Specifications
General
| Parameter | Value |
|---|---|
| Interfaces | IEC 625 (IEEE 488), RS-232 (9-pin D-Sub), AUX (BNC) |
| Display | LCD (Simultaneous digital and analog indication) |
Measurement Capabilities
| Parameter | Value |
|---|---|
| Frequency Range | 200 kHz to 4 GHz (sensor dependent) |
| Power Measurement Range | 0.7 mW to 2 kW (sensor dependent) |
| Averaging | Automatic (depends on selected resolution and sensor characteristics) |
Measurement Functions
| Parameter | Value |
|---|---|
| Power Measurements | Forward power, power absorbed by load |
| Power Parameters | Average power, average burst power, peak envelope power (PEP), crest factor, CCDF |
| Reflection Measurements | SWR, return loss, reflection coefficient, reverse-to-forward power ratio (%), reverse power |
Accuracy and Performance
| Parameter | Value |
|---|---|
| Zero Adjustment | Selectable with RF power switched off (approx. 5 s duration) |
Sensor Interfaces
| Parameter | Value |
|---|---|
| Supported Sensor Series | R&S NRT-Z, R&S NAP-Z |
| Front Panel Sensor Connectors | 1 input (for R&S NRT-Z sensors) |
| Rear Panel Sensor Connectors | 2 inputs for NRT-Z (option R&S NRT-B2); 1 input for NAP-Z (option R&S NRT-B1) |
| Frequency Response Correction | Uses stored sensor correction factors; 3 sets of calibration factor memory for NAP-Z sensors |
Display and User Interface
| Parameter | Value |
|---|---|
| Digital Display Units | W, dBm, dB, % |
| Display Resolution (HIGH) | 4½ digits (0.001 dB) |
| Display Resolution (LOW) | 3½ digits (0.01 dB) |
| Min/Max Tracking | Current maximum, minimum, or difference value (Max-Min) |
| Beeper | For SWR monitoring (selectable threshold) and keystroke acoustic echo |
Connectivity and I/O
| Parameter | Value |
|---|---|
| AUX Connector | BNC (Signaling output or TTL trigger input) |
Technology
Directional Power Measurement
Applications
Installation, maintenance, and monitoring of transmitters, amplifiers, antennas, and industrial RF/microwave generators