The Keysight (Agilent) E4401B is an ESA-E series RF spectrum analyzer offering a frequency range of 9 kHz to 1.5 GHz. Designed to provide a balance of speed, dynamic range, and accuracy, it features a rugged, portable build ideal for R&D, manufacturing, and field applications. The instrument offers configurable options such as high-stability frequency references, digital resolution bandwidths down to 1 Hz, and a tracking generator.
Specifications
General
| Parameter | Value |
|---|---|
| Interfaces | GPIB (Option A4H), RS-232, Parallel (Centronics), VGA out |
| Display | 16.8 cm (6.6 in) TFT color LCD, 640 x 480 resolution |
Physical
| Parameter | Value |
|---|---|
| Power Supply | 90 to 132 V rms (47 to 440 Hz), 195 to 250 V rms (47 to 66 Hz), < 300 W power consumption |
| Operating Temperature | 0 to +55 °C |
| Dimensions (W×H×D) | 373 mm W × 222 mm H × 409 mm D (without bumpers and handle) |
| Weight | 12.0 kg |
Frequency Specifications
| Parameter | Value |
|---|---|
| Frequency Range | 9 kHz to 1.5 GHz |
| Frequency Resolution | 1 Hz |
| Frequency Reference Aging Rate | ±2 x 10^-6 / year |
| Frequency Reference Temperature Stability | ±5 x 10^-6 |
| Frequency Span Range | 0 Hz (zero span), 100 Hz to 1.5 GHz |
| Span Accuracy | ±1% of span |
| Sweep Time Range (Span > 0 Hz) | 4 ms to 4000 s |
| Sweep Time Range (Zero Span) | 4 ms to 4000 s |
| Sweep Time Accuracy | ±1% |
| Sweep Trigger Sources | Free Run, Single, Line, Video, External, Delay |
Bandwidth (RBW / VBW)
| Parameter | Value |
|---|---|
| Resolution Bandwidth (RBW) Range | 1 kHz to 5 MHz (in 1-3-10 sequence); down to 10 Hz with Option 1DR |
| RBW Accuracy | ±15% (1 kHz to 5 MHz) |
| RBW Selectivity (60 dB / 3 dB Bandwidth Ratio) | < 15:1 (for analog RBW) |
| Video Bandwidth (VBW) Range | 30 Hz to 3 MHz; down to 1 Hz with Option 1DR |
Amplitude Specifications
| Parameter | Value |
|---|---|
| Measurement Range | DANL to +30 dBm |
| Maximum Safe Input Level | +30 dBm (1 W) continuous, with >= 15 dB attenuation |
| DC Input Voltage Limit | 0 Vdc |
| Frequency Response | ±0.5 dB (9 kHz to 1.5 GHz) |
| Attenuator Range | 0 to 60 dB |
| Attenuator Step Size | 5 dB |
| 1 dB Gain Compression Point | >= 0 dBm at input mixer |
| Reference Level Range | -149.9 dBm to +30 dBm in 0.1 dB steps |
| Scale Units | dBm, dBmV, dBµV, V, W, A |
| Overall Amplitude Accuracy | ±1.1 dB |
Spectral Purity & Phase Noise
| Parameter | Value |
|---|---|
| SSB Phase Noise (10 kHz offset) | <= -90 dBc/Hz |
| SSB Phase Noise (100 kHz offset) | <= -113 dBc/Hz |
| SSB Phase Noise (1 MHz offset) | <= -134 dBc/Hz |
| Residual FM | <= 150 Hz p-p in 100 ms (standard) |
Spurious and Distortion
| Parameter | Value |
|---|---|
| Third-Order Intercept (TOI) | +5 dBm |
| Second Harmonic Distortion (SHI) | +30 dBm (+40 dBm typical) |
| Input-Related Spurious Responses | <-65 dBc (for mixer level <= -30 dBm) |
| Residual Responses | <-90 dBm (with 50 ohm termination and 0 dB attenuation) |
Tracking Generator (Optional)
| Parameter | Value |
|---|---|
| Tracking Generator Frequency Range (Option 1DN) | 9 kHz to 1.5 GHz |
| Tracking Generator Output Power Range | -2 to -66 dBm |
| Tracking Generator Output Impedance | 50 ohms (nominal) |
Inputs and Outputs
| Parameter | Value |
|---|---|
| RF Input Connector | Type-N female (50 ohms nominal) |
| External Trigger Input | BNC female, > 10 kohms, TTL levels |
| VGA Output | 15-pin D-sub, VGA compatible |
| GPIB Interface | Optional (Option A4H) |
Measurement Suites & Software
| Parameter | Value |
|---|---|
| Marker Functions | Peak Search, Next Peak, Delta Marker, Marker Noise, Band Power |
| Measurement Capabilities | Adjacent Channel Power (ACP), Occupied Bandwidth (OBW), Channel Power, Multi-carrier ACP, Harmonic Distortion |
| Variable Trace Points | 101 to 8192 |
| Trace Detection Modes | Normal, Peak, Sample, Negative Peak, Average |
Power and Environmental
| Parameter | Value |
|---|---|
| AC Power Supply Voltage | 90 to 132 V rms, 195 to 250 V rms |
| AC Power Frequency | 47 to 440 Hz (90-132 V), 47 to 66 Hz (195-250 V) |
| Storage Temperature Range | -40 °C to +75 °C |
| Relative Humidity Range | Up to 95% non-condensing |
| Warm-Up Time | 5 minutes |
Physical Characteristics
| Parameter | Value |
|---|---|
| Enclosure Type | Rugged, portable benchtop with carrying handle |
| Cooling Mechanism | Forced air fan |
Inputs & Outputs
| Parameter | Value |
|---|---|
| RF Input Impedance | 50 ohms (standard), 75 ohms (Option 1DP) |
| Option 1DP RF Input Connector | 75 ohm BNC (female) |
| Probe Power Output | +15 Vdc, -12.6 Vdc (150 mA max) |
| Auxiliary Interface Connector | 9-pin sub-D female (provides sweep ramp, start-of-sweep, end-of-sweep) |
| Earphone Jack | 3.5 mm monaural |
Configuration Options
| Parameter | Value |
|---|---|
| Option 1DP Input Impedance | 75 ohms |
| Option 1D5 Frequency Reference | Oven-controlled crystal oscillator (OCXO) for high stability |
| Option 1DR Resolution Bandwidths | Adds 10 Hz, 30 Hz, 100 Hz, and 300 Hz digital RBW filters |
| Option B72 Memory Extension | Adds 16 MB flash memory and 16 MB RAM |
Data Storage
| Parameter | Value |
|---|---|
| Floppy Disk Drive | 3.5-inch MS-DOS compatible, 1.44 MB |
| Internal Storage Capacity | Up to 200 traces or states |
Standards & Compliance
| Parameter | Value |
|---|---|
| Environmental Compliance | Designed to meet MIL-PRF-28800F, Class 3 |
| Electromagnetic Compatibility | Conforms to EN 61326-1 and CISPR 11 (Class A, Group 1) |
| Safety Standards | Conforms to EN 61010-1 and CSA C22.2 No. 1010.1 |
Environmental
| Parameter | Value |
|---|---|
| Operating Altitude | Up to 3,000 meters (9,842 feet) |
| Storage Altitude | Up to 15,240 meters (50,000 feet) |
| Operating Vibration | Random vibration, 5 Hz to 500 Hz, 0.21 g RMS |
Options & Accessories
| Parameter | Value |
|---|---|
| Option 1DS Preamplifier Frequency Range | 100 kHz - 1.5 GHz |
| Option 1DS Preamplifier Gain | 20 dB (nominal) |
| Option 290 Programming Code Compatibility | HP 8590 Series compatible |
| Option 1D6 Time-Gated Sweep Gate Trigger Input | BNC female |
Technology
RF Spectrum Analysis
Applications
General Purpose RF testing, R&D, Manufacturing, Field Service