TESTRO ELECTRONICS LLC
| Payment Terms | L/C,D/A,D/P,T/T,Western Union,Western Union,T/T,MoneyGram |
| Delivery Time | 3-5 days |
| New / Used | Used |
| Frequency Range | 250 kHz – 2 GHz |
| Calibrated Output Power | +13 dBm to –136 dBm with Option 1E1 step attenuator |
| SSB Phase Noise | –126 dBc/Hz (typ.) @ 1 GHz, 20 kHz offset |
| Analog Modulation | AM, FM, φM up to 1 MHz deviation; Pulse to 50 kHz rate |
| Vector/I-Q Modulation | 30 MHz RF bandwidth with Option UND/UNU (external I-Q or internal baseband) |
| Brand Name | Keysight/Agilent/HP |
| Model Number | Agilent E4421B |
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Product Specification
| Payment Terms | L/C,D/A,D/P,T/T,Western Union,Western Union,T/T,MoneyGram | Delivery Time | 3-5 days |
| New / Used | Used | Frequency Range | 250 kHz – 2 GHz |
| Calibrated Output Power | +13 dBm to –136 dBm with Option 1E1 step attenuator | SSB Phase Noise | –126 dBc/Hz (typ.) @ 1 GHz, 20 kHz offset |
| Analog Modulation | AM, FM, φM up to 1 MHz deviation; Pulse to 50 kHz rate | Vector/I-Q Modulation | 30 MHz RF bandwidth with Option UND/UNU (external I-Q or internal baseband) |
| Brand Name | Keysight/Agilent/HP | Model Number | Agilent E4421B |
| High Light | agilent signal generator E4421B ，Vector Signal Generator E4421B ，ESG-AP Vector Signal Generator | ||
The pre-owned Agilent E4421B ESG-AP delivers fully synthesized accuracy from 250 kHz to 2 GHz while offering both high-purity CW and complex analog or vector modulation in a single 3-U chassis. A typical –126 dBc/Hz phase-noise floor keeps mixer and receiver tests honest, and the optional 110 dB step attenuator provides a calibrated +13 dBm to –136 dBm span for PA compression or sensitivity work. Built-in AM/FM/PM plus optional 30 MHz I-Q bandwidth support GSM, Bluetooth and narrow-band IoT waveforms, while LAN/GPIB SCPI control lets the generator slip straight into automated benches.
Refurbished units ship ISO-17025-calibrated with current firmware, trimming capital cost and lead-time yet preserving Keysight reliability and upgrade paths.
Interested in an Agilent E4421B — 2 GHz ESG-AP Analog/Vector Signal Generator or a similar model?
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Looking for other models? Our inventory changes daily—ask for the latest list of spectrum analyzers and RF equipment.
Laboratory-Verified Performance
Every unit ships with an ISO/IEC 17025 calibration certificate bearing the TESTRO Certified seal, so you know the specifications are not just claimed—they’re proven.
Total Transparency
High-resolution teardown photos and a live video test session let you inspect seals, modules, and real-time performance metrics before you pay.
Real Warranty, Real People
One-year machine warranty, with our engineering team standing by on business days to provide remote assistance for any software or hardware issues.
Global Delivery, Built-In Protection
DHL lanes—arriving at most destinations in just 3–5 days.
Flexible, Modern Payments
Choose traditional T/T or wire transfer, credit card.
Open-Door Assurance
Visit our Shenzhen facility, walk the refurbishment line, and see your equipment on the bench before it leaves our dock.
Company Details
Business Type:
Distributor/Wholesaler,Agent,Exporter
Year Established:
2017
Total Annual:
2,000,000-3,000,000
Employee Number:
30~50
Ecer Certification：
Verified Supplier
Founded in 2017 and headquartered in Shenzhen, TESTRO Electronics LLC focuses on the secondary sale and flexible rental of high-end electronic test instruments. The team counts 30 employees and operates a 1,500 m² warehouse and inspection center in Qianhai, Shenzhen. ... Founded in 2017 and headquartered in Shenzhen, TESTRO Electronics LLC focuses on the secondary sale and flexible rental of high-end electronic test instruments. The team counts 30 employees and operates a 1,500 m² warehouse and inspection center in Qianhai, Shenzhen. ...
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