# Agilent E4400A Analog RF Signal Generator, 250 kHz to 1000 MHz (Pre-Owned) # Agilent E4400A Analog RF Signal Generator, 250 kHz to 1000 MHz (Pre-Owned) ## Key Features At A Glance - Frequency range 250 kHz to 1000 MHz with 0.01 Hz resolution - Output level range +13 to -136 dBm at 0.02 dB resolution - AM, FM, phase, and pulse modulation with an internal modulation source - SSB phase noise <-120 dBc/Hz at 500 MHz (typical, 20 kHz offset) - HP-IB (IEEE-488.2) and RS-232 remote control with SCPI 1992.0 - Optional high-stability timebase (Opt 1E5): aging <±0.1 ppm/yr - Reverse power protection to 50 W max and 50 V dc max - Conducted/radiated interference meets MIL-STD-461B RE02 Part 2 and CISPR 11 The Agilent E4400A is an analog RF signal generator covering 250 kHz to 1000 MHz, also identified as the Agilent ESG-1000A. It produces calibrated RF output across that span with 0.01 Hz frequency resolution, and pairs that frequency agility with a broad amplitude range and a full suite of analog modulation modes driven from an internal source. An analog RF signal generator supplies a known, controllable RF stimulus so that an engineer can drive a device under test and measure its response. It serves as the source half of a stimulus-response test setup, generating carrier signals at defined frequencies, levels, and modulation states for bench and system measurements. ValueTronics stocks and holds its own inventory in a 20,000 sq ft secure warehouse at 1675 Cambridge Drive in Elgin, Illinois. Every used unit is inspected and functionally verified in-house against the original manufacturer specifications before it ships, while new units ship factory-sealed exactly as received from the manufacturer. ## Brand Heritage This instrument carries Agilent branding from the era when Hewlett-Packard spun off its test and measurement business as Agilent Technologies in 1999. Agilent's electronic measurement division later became Keysight Technologies in 2014. ## Product Core & Specifications Specification Value Frequency Frequency Range (Agilent ESG-1000A) 250 kHz to 1000 MHz Resolution 0.01 Hz Switching Speed Modulation On: <45 ms, typical; 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 Resolution 0.02 dB Level Accuracy (at 23 ±5°C), +7 to -127 dBm 250 kHz to 1 GHz: ±0.5 dB Level Accuracy (at 23 ±5°C), <-127 dBm 250 kHz to 1 GHz: ±1.5 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 1000 MHz: 50 Watts; Max dc Voltage: 50 V SWR (typical) 250 kHz to 1000 MHz: <1.4:1 Output Impedance 50 ohms Level Accuracy footnote Accuracy degrades by 0.02 dB/°C over full temperature range and by 0.3 dB above +7 dBm. Frequency Bands Band 1 250 kHz to <=249.999 MHz; N# 1 Band 2 \>249.999 to <=500 MHz; N# 0.5 Band 3 \>500 MHz to <=1 GHz; N# 1 Spectral Purity SSB Phase Noise (typical, at 20 kHz offset) at 500 MHz: <-120 dBc/Hz; at 1000 MHz: <-116 dBc/Hz Residual FM (CW mode, 0.3-3 kHz BW, CCITT, rms) Phase Noise Mode 1: Harmonics (<=+4 dBm output level) <-30 dBc Nonharmonics (>3 kHz offset, <+7 dBm output level) 250 kHz to 1000 MHz: <-65 dBc Subharmonics (<=1000 MHz) None 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 (deviation = 100 kHz), FM1 1 dB BW: dc/20 Hz to 100 kHz; 3 dB BW, typical: dc/5 Hz to 10 MHz Modulation Frequency Response (deviation = 100 kHz), FM2 1 dB BW: dc/20 Hz to 100 kHz; 3 dB BW, typical: 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: dc to 100 kHz; PM2: dc to 100 kHz Modulation Frequency Response, High BW (N x 2 pi rad) PM1: dc to 1.5 MHz (typ); PM2: dc to 1 MHz (typ) Modulation Frequency Response, High BW (N x pi/2 rad) PM1: dc to 4 MHz (typ); PM2: 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%) Pulse Modulation On/Off Ratio (<=1 GHz) \>80 dB Rise/Fall Times 150 ns, typical Minimum Width (typical) ALC On: 2 µs; ALC Off: 0.4 µs Pulse Repetition Frequency (typical) ALC On: 10 Hz to 250 kHz; ALC Off: DC to 1.0 MHz Level Accuracy (relative to CW) ± 0.5 dB, typical Internal Pulse Generator (Squarewave only) Squarewave Rates 0.1 Hz to 50 kHz Pulse Period 16 µs to 30 seconds Width 8 µs to 30 seconds Resolution 4 µs Internal Modulation Source Provides FM, PM, and AM Modulation Signals and LF Out Waveforms sine, square, ramp, triangle, pulse, noise Rate Range Sine: 0.1 Hz to 50 kHz; Square, Ramp, Triangle: 0.1 Hz to 10 kHz; Pulse: 4 µs Resolution 0.1 Hz Frequency Accuracy 0.005% Swept Sine Mode (Frequency, Phase Continuous), Operating Modes Triggered or Continuous Sweeps Swept Sine Mode, Frequency Range 0.1 Hz to 50 kHz Swept Sine Mode, Sweep Time 1 ms to 65 seconds Swept Sine Mode, Resolution 1 ms Dual Sinewave Mode, Frequency Range 0.1 Hz to 50 kHz Dual Sinewave Mode, Amplitude Ratio 0 to 100% Dual Sinewave Mode, Amplitude Resolution 0.1% LF Out (Internal Modulation Source) Amplitude 0 to 3 Vpeak into 50 ohms Output Impedance <1 ohm External Modulation Inputs Modulation Types Ext1: FM, PM, AM, and Burst Envelope; Ext2: FM, PM, AM, and Pulse Simultaneous Modulation All modulation types may be simultaneously enabled, except: FM with PM, AM with Burst. AM, FM, and PM can sum simultaneous inputs from any two sources (INT, EXT1, and EXT2.) Any given source (INT, EXT1, or EXT2) may only be routed to one activated modulation type. Remote Programming Interface HP-IB (IEEE-488.2-1987) with Listen and Talk, RS-232 Control Languages SCPI version 1992.0, also compatible with Agilent 8656B & 8657A/B/D/J mnemonics Functions Controlled All front panel functions except power switch and knobs IEEE-488 Functions SH1, AH1, T6, TE0, L4, LE0, SR1, RL1, PP0, DC1, DT0, C0, E2 General Power Requirements 90 to 254 V; 50, 60, or 400 Hz; 200 W maximum Operating Temperature Range 0 to 55° C Leakage Conducted and radiated interference meets MIL-STD-461B RE02 Part 2 and CISPR 11 > **Important:** Reverse power protection: 50 W maximum, 50 V dc maximum. ## About this Pre-Owned unit 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. - Warranty included - Functional verification included - Standard Calibration Upgrade Options: No Calibration Required, NIST Traceable, Z540.1 or ISO 17025 with Data, Z540.3 Guardbanding with Data. - Note that unnecessary accessories may not be included (contact Test Architect to confirm). 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.** ## Details - **Price:** 0.0 USD - 1050.0 USD - **Vendor:** Agilent - **Type:** Rf Gen - **Tags:** Agilent, Agilent Keysight, Manufacturers, product_manual_group_1, Product_used, RF, Signal Generators ## Variants | Variant | Price | Available | |---------|-------|-----------| | None | 0.00 USD | In stock | | NIST Traceable | 700.00 USD | In stock | | NIST Traceable with Full Data | 840.00 USD | In stock | | ISO IEC 17025 Accredited | 1050.00 USD | In stock | ## Images - E4400A Agilent RF Generator --- > Source: [ValueTronics](https://valuetronics.com/products/e4400a-agilent-rf-generator-used) > Updated: 2026-07-06