The Keysight (Agilent/HP) E4431B is a 250 kHz to 2 GHz digital RF signal generator from the ESG-D series. It provides versatile analog and digital modulation capabilities, an internal baseband generator with 40 MHz sample rate, and extensive support for custom and standard communications formats, making it highly suitable for R&D, manufacturing, and troubleshooting applications.
Specifications
Frequency
| Parameter | Value |
|---|---|
| Minimum Frequency | 250 kHz |
| Maximum Frequency | 2 GHz |
| Frequency Resolution | 0.01 Hz |
Output
| Parameter | Value |
|---|---|
| Phase Noise | < -116 dBc/Hz (1 GHz carrier, 20 kHz offset) |
Modulation
| Parameter | Value |
|---|---|
| Modulation | AM, FM, Phase, Pulse, Custom Digital (FSK, MSK, PSK, QAM) |
| Sweep Modes | Step, List (Frequency and Power) |
General
| Parameter | Value |
|---|---|
| Reference Oscillator | 10 MHz |
| Interfaces | GPIB, RS-232 |
Physical
| Parameter | Value |
|---|---|
| Dimensions (W×H×D) | 426 × 133 × 432 |
Frequency Characteristics
| Parameter | Value |
|---|---|
| Internal Reference Frequency | 10 MHz |
Amplitude / Output Characteristics
| Parameter | Value |
|---|---|
| Amplitude Resolution | 0.02 dB |
| Output Impedance | 50 Ω |
| Reverse Power Protection (RF) | 50 W |
| Reverse Power Protection (DC) | 50 V |
Connectivity & Interfaces
| Parameter | Value |
|---|---|
| RF Output Connector | Type-N (female) |
Power
| Parameter | Value |
|---|---|
| Power Consumption | 200 W maximum |
Environmental
| Parameter | Value |
|---|---|
| Operating Temperature | 0 °C to 55 °C |
| Storage Temperature | -40 °C to 71 °C |
| Operating Humidity | 5% to 95% RH, non-condensing (up to 40°C) |
| Maximum Altitude | 4,600 m (15,000 ft) |
Spectral Purity
| Parameter | Value |
|---|---|
| Harmonics | < -30 dBc (output ≤ +4 dBm) |
| Non-harmonics (Spurious, 250 kHz to 1 GHz) | < -65 dBc |
| Non-harmonics (Spurious, 1 GHz to 2 GHz) | < -59 dBc |
Performance
| Parameter | Value |
|---|---|
| Frequency Switching Speed | < 45 ms |
| Amplitude Switching Speed | < 30 ms |
| VSWR | < 1.5:1 (typical, output < 0 dBm) |
Internal Modulation Source
| Parameter | Value |
|---|---|
| LF Generator Frequency Range | 0.1 Hz to 50 kHz |
| LF Generator Waveforms | Sine, square, ramp, triangle, pulse, noise |
Inputs & Outputs
| Parameter | Value |
|---|---|
| External I/Q Inputs | BNC female, 50 Ω (front panel) |
Compliance
| Parameter | Value |
|---|---|
| Safety Compliance | IEC 61010-1, EN 61010-1, CSA C22.2 No. 1010.1 |
Technology
Digital RF / Microwave
Applications
Research & Development, Manufacturing, Wireless Communications Testing