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The Agilent E4431A is a digital RF signal generator that delivers a calibrated, modulated RF source from 250 kHz to 2000 MHz. A member of the ESG series, it combines a synthesized carrier with a full suite of analog modulation modes and I/Q vector modulation, providing a single-box stimulus source for both general-purpose RF work and digitally modulated communications signals.
With the optional I/Q baseband generator (Option UN3 or UN4), the E4431A generates framed, digitally modulated signals for the DECT, GSM (including DCS1800/PCS1900), NADC, PDC, PHS, and TETRA standards. The baseband generator structures data into frames and timeslots that can be configured as traffic or control channels, with each timeslot accepting a user file, a PRBS pattern (PN9 or PN15), or external serial data with the appropriate clock.
ValueTronics stocks and holds its own test-and-measurement inventory in a 20,000 square-foot secure warehouse at 1675 Cambridge Drive in Elgin, Illinois. Every pre-owned unit is inspected and functionally verified in-house before it ships, while new units leave the warehouse factory-sealed exactly as received from the manufacturer.
Agilent Technologies was spun off from Hewlett-Packard in 1999. In 2014, Agilent's electronic measurement business was established as a separate company, Keysight Technologies, which now supports this product line.
| Specification | Value |
|---|---|
| Frequency | |
| Frequency Range | 250 kHz to 2000 MHz |
| Resolution | 0.01 Hz |
| Switching Speed (Modulation On) | <45 ms, typical |
| Switching Speed (Modulation Off) | <35 ms, typical |
| Accuracy | Same as timebase |
| Sweep Modes | |
| Operating Modes | Step: frequency & power, and arbitrary list |
| Dwell Time | 2 ms to 60 sec |
| Number of Points | 2 to 401 |
| Internal Reference Oscillator | |
| Aging Rate (Standard, typical) | <±2 ppm/yr |
| Aging Rate (High Stability, Opt 1E5) | <±0.1 ppm/yr or <±0.0005 ppm/day after 45 days |
| Temperature (Standard) | <±1 ppm |
| Temperature (High Stability, Opt 1E5) | <±0.05 ppm, typical (0° to 55° C) |
| Line Voltage (Standard) | <±0.1 ppm (+5%, -10%) |
| Line Voltage (High Stability, Opt 1E5) | <±0.002 ppm, typical (+5%, -10%) |
| Timebase Reference Output | Frequency: 10 MHz; Amplitude: >0.35 Vrms into 50 ohm load |
| External Reference Input | Frequency: 1, 2, 5, 10 MHz ± typ. 10 ppm (Option 1E5: 1 ppm, typical); Amplitude: >0.15 Vrms; Input Impedance: 50 ohm |
| Output | |
| Range (250 kHz to 1000 MHz) | +13 to -136 dBm |
| Range (>1000 MHz to 3000 MHz) | +10 to -136 dBm |
| Range (>3000 MHz to 4000 MHz) | +7 to -136 dBm |
| Resolution | 0.02 dB |
| Level Accuracy (at 23 ±5°C, +7 to -127 dBm), 250 kHz to 2 GHz | ±0.5 dB |
| Level Accuracy (at 23 ±5°C, +7 to -127 dBm), 2 GHz to 4 GHz | ±0.9 dB |
| Level Accuracy (<-127 dBm), 250 kHz to 2 GHz | ±1.5 dB |
| Level Accuracy (<-127 dBm), 2 GHz to 4 GHz | ±2.5 dB |
| Attenuator Hold Level Range | >17 dB |
| Switching Speed | <25 ms typical; With Power Search Mode: <210 ms typical |
| Reverse Power Protection (250 kHz to 2000 MHz) | 50 Watts |
| Reverse Power Protection (>2000 MHz to 4000 MHz) | 25 Watts |
| Max DC Voltage | 50 V |
| SWR (typical), 250 kHz to 2000 MHz | <1.4:1 |
| SWR (typical), >2000 to 4000 MHz | <1.9:1 |
| Output Impedance | 50 ohms |
| Spectral Purity | |
| SSB Phase Noise (typical, at 20 kHz offset) at 500 MHz | <-120 dBc/Hz |
| SSB Phase Noise at 1000 MHz | <-116 dBc/Hz |
| SSB Phase Noise at 2000 MHz | <-110 dBc/Hz |
| SSB Phase Noise at 3000 MHz | <-104 dBc/Hz |
| SSB Phase Noise at 4000 MHz | <-104 dBc/Hz |
| Residual FM (CW mode, 0.3-3 kHz BW, CCITT, rms), Phase Noise Mode 1 | |
| Residual FM, Phase Noise Mode 2 | |
| Harmonics (<=+4 dBm output level) | <-30 dBc |
| Nonharmonics (>3 kHz offset, <+7 dBm output level), 250 kHz to 1000 MHz | <-65 dBc |
| Nonharmonics, >1000 MHz to 2000 MHz | <-59 dBc |
| Nonharmonics, >2000 MHz | <-53 dBc |
| Subharmonics, <=1000 MHz | None |
| Subharmonics, >1000 MHz | <-40 dBc |
| I/Q Modulation | |
| I & Q Inputs Input Impedance | 50 ohms |
| Full Scale Input | √(I² + Q²) = 0.5 Vrms |
| External Input RF Bandwidth (1 dB) | 20 MHz, typical |
| DC Offset (I + Q independently adjustable) | ±100% |
| I/Q Gain Ratio | ±4 dB |
| DC Vector Accuracy — Static EVM (rms): <0.6 GHz / 0.6 to 2 GHz / 2 to 3.7 GHz / <=4 GHz | <0.75% / <0.5% / 0.75% / <1% |
| DC Vector Accuracy — Magnitude Error (rms): <0.6 GHz / 0.6 to 2 GHz / 2 to 3.7 GHz / <=4 GHz | <0.5% / <0.35% / <0.5% / <0.75% |
| DC Vector Accuracy — Phase Error (rms): <0.6 GHz / 0.6 to 2 GHz / 2 to 3.7 GHz / <=4 GHz | <0.35° / <0.25° / <0.35° / <0.5° |
| DC Vector Accuracy — Origin Offset (dBc): <0.6 GHz / 0.6 to 2 GHz / 2 to 3.7 GHz / <=4 GHz | <-46 / <-46 / <-40 / <-40 |
| Frequency Modulation | |
| Maximum Deviation | N x 10 MHz |
| Resolution | 0.1% of deviation or 1 Hz, whichever is greater |
Deviation Accuracy (1 kHz rate, dev. | <±(3.5% of FM deviation + 20 Hz) | |
| Modulation Frequency Response FM1 (1 dB BW / 3 dB BW typical) | dc/20 Hz to 100 kHz / dc/5 Hz to 10 MHz |
| Modulation Frequency Response FM2 (1 dB BW / 3 dB BW typical) | dc/20 Hz to 100 kHz / dc/5 Hz to 1 MHz |
| Distortion (1 kHz rate, THD, dev. = N x 100 kHz) | <1% |
| Phase Modulation | |
| Maximum Deviation | N x 90 radians |
| Resolution | 0.1% of set deviation |
| Deviation Accuracy (1 kHz rate) | <±(5% of deviation + 0.01 radians) |
| Modulation Frequency Response — Normal BW (N x 90 rad): PM1 / PM2 (3 dB BW) | dc to 100 kHz / dc to 100 kHz |
| Modulation Frequency Response — High BW (N x 2π rad): PM1 / PM2 (3 dB BW) | dc to 1.5 MHz (typ) / dc to 1 MHz (typ) |
| Modulation Frequency Response — High BW (N x π/2 rad): PM1 / PM2 (3 dB BW) | dc to 4 MHz (typ) / dc to 0.9 MHz (typ) |
Distortion (1 kHz rate, THD, dev | <1% | |
| Amplitude Modulation (fc > 500 kHz) | |
| Range (envelope peak <= max specified power) | 0 to 100% |
| Resolution | 0.1% |
| Rates (3 dB Bandwidth) | dc/10 Hz to 10 kHz |
| Distortion (1 kHz rate, THD) 30% AM | <1.5% |
| Distortion (1 kHz rate, THD) 90% AM | <4% |
| Accuracy (1 kHz rate) | <±(5% of setting + 1%) |
| Wide Band AM | |
| Rate (1 dB Bandwidth, typical) ALC On | 400 Hz to 10 MHz |
| Rate (1 dB Bandwidth, typical) ALC Off | DC to 10 MHz |
| Input | I Input |
| Sensitivity | 0.5 V = 100% |
| Pulse Modulation | |
| On/Off Ratio <=3 GHz | >80 dB |
| On/Off Ratio >3 GHz | >60 dB |
| Rise/Fall Times | 150 ns, typical |
| Minimum Width (ALC On / ALC Off) | 2 µs, typical / 0.4 µs, typical |
| Pulse Repetition Frequency (ALC On) | 10 Hz to 250 kHz, typical |
| Pulse Repetition Frequency (ALC Off) | DC to 1.0 MHz, typical |
| Level Accuracy (relative to CW) | ±0.5 dB, typical |
| External Input (Ext 2) Input Voltage | RF On: >+0.5 V, nominal; RF Off: <+0.5 V, nominal |
| External Input (Ext 2) Input Impedance | 50 ohms, nominal |
| Internal Pulse Generator | Squarewave Rate: 0.1 Hz to 50 kHz; Pulse Period: 16 µs to 30 sec; Pulse Width: 8 µs to 30 sec; Pulse Resolution: 4 µs |
| Burst Envelope | |
| On/Off Ratio (VIN <=-1.05 V) <=3 GHz | >75 dB |
| Impedance | 50 ohms |
Important: Reverse power protection: 50 W from 250 kHz to 2000 MHz; maximum applied DC voltage 50 V.
This pre-owned unit is inspected and functionally verified in-house before it ships and is backed by our pre-owned warranty. To confirm its exact condition, firmware revision, installed options, or included accessories for your application before ordering, contact our Test Architects.
ValueTronics supplies both new and used test and measurement equipment. New units ship factory-sealed, exactly as received from the manufacturer; every used unit is inspected and functionally verified in-house at our 20,000 sq ft secure facility in Elgin, Illinois before it ships. Our Test Architects can help you select the condition, calibration, and configuration that fit your application.
Please review the Manufacturer's Data Sheet to verify published specifications. Feedback on this webpage is always welcome — please reach out to your Test Architect at any time for questions or concerns. Thank you, we truly appreciate you being our customer.
Model No
Agilent
Condition
Pre-Owned
Manufacturer
Agilent
Rf_gen_freq
250 kHz to 2000 MHz
100000
High-stability timebase
UN4
I/Q Baseband Generator with 8 Mbit Pattern RAM
30+ Years in Business
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