The Keysight Technologies U2004A is a USB-based RF diode power sensor operating across a wide frequency range of 9 kHz to 6 GHz. Designed for fast and accurate power measurements, it eliminates the need for an external power meter by connecting directly to a PC or compatible Keysight instrument. The sensor features internal zeroing and calibration capabilities, high measurement speed up to 1000 readings per second in double-buffered mode, and a wide dynamic range of -60 dBm to +20 dBm, making it ideal for manufacturing, installation, maintenance, and automated test environments.
Specifications
General
| Parameter | Value |
|---|---|
| Interfaces | USB 2.0 High Speed (USBTMC-USB488) |
| Display | None (results displayed via host PC software or compatible Keysight instrument) |
| Warm-up Time | 30 minutes |
| Standard Warranty | 3 years |
Physical
| Parameter | Value |
|---|---|
| Power Supply | USB bus powered, 4.5 V to 5.5 V, < 200 mA (measurement), < 275 mA (zeroing/calibration) |
| Operating Temperature | 0 to 55 °C |
| Dimensions (W×H×D) | 46 mm W x 30 mm H x 134 mm D (including RF connector) |
| Weight | 0.262 |
RF Performance
| Parameter | Value |
|---|---|
| Frequency Range | 9 kHz to 6 GHz |
| Power Range | -60 dBm to +20 dBm |
| RF Impedance | 50 Ω nominal |
| RF Input Connector | Type-N (male) |
| Maximum SWR (9 kHz to 2 GHz) | 1.13 |
| Maximum SWR (2 GHz to 6 GHz) | 1.17 |
| Maximum SWR (0 to 55 °C, 9 kHz to 2 GHz) | 1.15 |
| Maximum SWR (0 to 55 °C, 2 GHz to 6 GHz) | 1.21 |
Measurement Accuracy & Uncertainty
| Parameter | Value |
|---|---|
| Power Linearity (-60 to -10 dBm) | ±3.0% (at 25 °C ± 5 °C) |
| Power Linearity (-10 to +20 dBm) | ±4.0% (at 25 °C ± 5 °C) |
| Zero Set | ±4.0 nW |
| Zero Drift | ±1.5 nW |
| Measurement Noise | 4.0 nW |
Measurement Speed
| Parameter | Value |
|---|---|
| Measurement Speed (Normal Mode) | 110 readings/s |
| Measurement Speed (Double-Buffered Mode) | 1000 readings/s |
Triggering
| Parameter | Value |
|---|---|
| Trigger Sources | Continuous (Free Run), Internal, External |
| Trigger Delay Range | 1 µs to 400 ms |
| Trigger Delay Resolution | 1 µs |
| Trigger Jitter | ±1 µs |
| External Trigger Input Level | TTL compatible (low < 0.8 V, high > 2.0 V) |
| External Trigger Input Impedance | > 10 kΩ nominal |
| External Trigger Output Level | TTL compatible (low < 0.4 V, high > 2.4 V) |
| Trigger Connector Type | SMB (male) |
| Trigger Holdoff Range | 1 µs to 400 ms |
| Trigger Holdoff Resolution | 1 µs |
| Internal Trigger Level Range | -20 dBm to +20 dBm |
| Internal Trigger Level Resolution | 0.1 dB |
| Trigger Latency | 11 µs ± 2 µs |
| External Trigger Output Pulse Width | 450 ns (typical) |
| External Trigger Input Minimum Pulse Width | 15 ns |
Damage & Maximum Ratings
| Parameter | Value |
|---|---|
| Maximum Continuous RF Input Power | +25 dBm (300 mW) |
| Maximum DC Input Voltage | 5 VDC |
Calibration & Traceability
| Parameter | Value |
|---|---|
| Internal Calibration & Zeroing | Supported (built-in internal zeroing and calibration) |
| Calibration Cycle | 1 year |
Connectivity & Software
| Parameter | Value |
|---|---|
| Host Interface USB Class | USBTMC-USB488 |
| Command Set / Programming Language | SCPI |
| Compatible Software Applications | Keysight BenchVue (BV0007B Power Meter App), N1918A Power Analysis Manager |
Environmental & Compliance
| Parameter | Value |
|---|---|
| Storage Temperature Range | -40 °C to 70 °C |
| Operating Humidity | Up to 95% RH at 40 °C (non-condensing) |
| Storage Humidity | Up to 90% RH at 65 °C (non-condensing) |
| Operating Altitude | Up to 4,600 m (15,000 ft) |
| Storage Altitude | Up to 15,240 m (50,000 ft) |
| EMC Compliance | IEC 61326-1 / EN 61326-1 |
| Safety Standards | IEC 61010-1 / EN 61010-1 |
| Vibration Limit (Random) | 3.21 g rms, 5 to 500 Hz |
| Shock Limit | 30 g, 11 ms half-sine |
Physical Characteristics
| Parameter | Value |
|---|---|
| Form Factor | Compact USB sensor |
Accuracy & Uncertainty
| Parameter | Value |
|---|---|
| Calibration Uncertainty (25 °C ± 10 °C, 9 kHz to 2 GHz) | 1.8% |
| Calibration Uncertainty (25 °C ± 10 °C, 2 GHz to 6 GHz) | 2.0% |
| Calibration Uncertainty (0 °C to 55 °C, 9 kHz to 2 GHz) | 2.0% |
| Calibration Uncertainty (0 °C to 55 °C, 2 GHz to 6 GHz) | 2.5% |
Performance
| Parameter | Value |
|---|---|
| Frequency Resolution | 1 kHz |
| Manual Averaging Range | 1 to 1024 |
Power Requirements
| Parameter | Value |
|---|---|
| Current Consumption | < 220 mA (maximum), < 160 mA (typical) @ 5 V |
| Power Consumption | < 1.1 W |
Compliance & Safety
| Parameter | Value |
|---|---|
| Overvoltage Category | CAT I |
| Pollution Degree | 2 |
Calibration & Zeroing
| Parameter | Value |
|---|---|
| Internal Zeroing Duration | 14 s (typical) |
| Internal Calibration Duration | 6 s (typical) |
Accuracy & Linearity
| Parameter | Value |
|---|---|
| Power Linearity (0 to 55 °C, -60 to -10 dBm) | ±4.5% (±0.20 dB) |
| Power Linearity (0 to 55 °C, -10 to +20 dBm) | ±4.5% (±0.20 dB) |
| Zero Set (0 to 55 °C) | ±10 nW |
Connectivity
| Parameter | Value |
|---|---|
| USB Cable Length Options | 1.5 m (standard), 3.0 m, 5.0 m |
Software & Drivers
| Parameter | Value |
|---|---|
| Supported Drivers | IVI-COM, IVI-C, LabVIEW |
Technology
Diode Power Sensor
Applications
RF and microwave average power measurements