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The Agilent E8257D PSG is a fully synthesized analog signal generator engineered for high output power, low phase noise, and optional ramp sweep capability. It is offered in frequency-range options spanning 250 kHz to 20, 31.8, 40, 50, or 67 GHz (operational up to 70 GHz in the 67 GHz configuration), with CW frequency resolution of 0.001 Hz and phase offset adjustable in nominal 0.1° increments. Specifications apply over a 0 to 55 °C range after a 45-minute warm-up.
A signal generator produces the known, controllable stimulus signals an engineer uses to exercise a device under test. The E8257D supports synthesized step and list sweeps of frequency, amplitude, or both, and with the analog ramp sweep option it is fully compatible with the Agilent 8757D scalar network analyzer for swept measurements. Its SCPI command set emulates several earlier Agilent signal generators for general compatibility with ATE systems, and the instrument interfaces with Agilent 83550 Series millimeter heads and OML millimeter source modules for extended-frequency work.
ValueTronics holds inventory in our own 20,000 sq ft secure warehouse at 1675 Cambridge Drive, Elgin, Illinois. Used units are inspected and functionally verified in-house by our technicians before they ship; new units ship factory-sealed exactly as received, since we never open or test a factory-sealed box.
The PSG signal generators carry the Agilent Technologies name. Agilent was established in 1999 as a spin-off of Hewlett-Packard's test, measurement, and analysis businesses, and in 2014 that electronic measurement business was separated again to form Keysight Technologies. Products originally branded Agilent are part of the same corporate lineage now carried under Keysight.
| Specification | Value |
|---|---|
| Frequency | |
| Range (Option 520) | 250 kHz to 20 GHz |
| Range (Option 532) | 250 kHz to 31.8 GHz |
| Range (Option 540) | 250 kHz to 40 GHz |
| Range (Option 550) | 250 kHz to 50 GHz |
| Range (Option 567) | 250 kHz to 67 GHz (operational up to 70 GHz) |
| Resolution (CW) | 0.001 Hz |
| Resolution (all sweep modes) | 0.01 Hz |
| CW switching speed | < 11 ms (typ); 7 ms (nom) |
| Phase offset | Adjustable in nominal 0.1 ° increments |
| Timebase aging rate (standard) | < ±3 × 10⁻⁸/year or < ±2.5 × 10⁻¹⁰/day after 30 days |
| Timebase temperature effects (typ) | < ±4.5 × 10⁻⁹, 0 to 55 °C |
| Line voltage effects (typ) | < ±2 × 10⁻¹⁰ for ±10% change |
| External reference frequency | 10 MHz only |
| Lock range | ±1.0 ppm |
| Reference output | 10 MHz, > +4 dBm into 50 Ω load (typ) |
| External reference input | 5 dBm ±5 dB; input impedance 50 Ω (nom) |
| Step (Digital) Sweep | |
| Operating modes | Step sweep / list sweep of frequency or amplitude or both |
| Frequency sweep range | Within instrument frequency range |
| Amplitude sweep range | Within attenuator hold range |
| Dwell time | 1 ms to 60 s |
| Number of points | 2 to 65535 (step sweep); 2 to 1601 per table (list sweep) |
| Triggering | Auto, external, single, or GPIB |
| Settling time (frequency) | < 8 ms (typ) |
| Settling time (amplitude) | < 5 ms (typ) |
| Ramp (Analog) Sweep (Option 007) | |
| Operating modes | Synthesized frequency sweep (start/stop, center/span, swept CW); power sweep; manual sweep; alternate sweep |
| Sweep span range | Settable from minimum to full range |
| Max sweep rate (250 kHz to < 0.5 GHz) | 25 MHz/ms |
| Max sweep rate (0.5 to < 1 GHz) | 50 MHz/ms |
| Max sweep rate (1 to < 2 GHz) | 100 MHz/ms |
| Max sweep rate (2 to < 3.2 GHz) | 200 MHz/ms |
| Max sweep rate (≥ 3.2 GHz) | 400 MHz/ms |
| Frequency accuracy | ± 0.05% of span ± timebase (at 100 ms sweep time) |
| Sweep time (manual mode settable) | 10 ms to 200 seconds; resolution 1 ms |
| Markers | 10 independent continuously variable frequency markers |
| Network analyzer compatibility | Fully compatible with Agilent 8757D scalar network analyzer |
| Output Power — Option 520 (Standard spec. (typ) / Option 1EA (typ)) | |
| 250 kHz to 3.2 GHz | –20 to +15 / –20 to +16 (+19) |
| 250 kHz to 3.2 GHz with Option UNW | –20 to +11 / –20 to +11 (+14) |
| 250 kHz to 3.2 GHz with Option 1EH | –20 to +13 / –20 to +13 (+16) |
| 250 kHz to 3.2 GHz with Options UNW and 1EH | –20 to +10 / –20 to +10 (+13) |
| > 3.2 GHz to 5.2 GHz | –20 to +15 / –20 to +22 (+23) |
| > 5.2 GHz to 12 GHz | –20 to +15 / –20 to +23 (+24) |
| > 12 GHz to 20 GHz | –20 to +15 / –20 to +21 (+23) |
| Output Power — Options 532 and 540 (Standard spec. (typ) / Option 1EA (typ)) | |
| 250 kHz to 3.2 GHz | –20 to +11 / –20 to +15 (+18) |
| 250 kHz to 3.2 GHz with Option UNW | –20 to +9 / –20 to +10 (+13) |
| 250 kHz to 3.2 GHz with Option 1EH | –20 to +9 / –20 to +12 (+15) |
| 250 kHz to 3.2 GHz with Options UNW and 1EH | –20 to +9 / –20 to +9 (+12) |
| > 3.2 to 17 GHz | –20 to +11 / –20 to +19 (+21) |
| > 17 to 37 GHz | –20 to +11 / –20 to +16 (+19) |
| > 37 to 40 GHz | –20 to +11 / –20 to +14 (+17) |
| Output Power — Options 550 and 567 (Standard spec. (typ) / Option 1EA (typ)) | |
| 250 kHz to 3.2 GHz | –20 to +5 / –20 to +14 (+17) |
| 250 kHz to 3.2 GHz with Option UNW | –20 to +5 / –20 to +9 (+12) |
| 250 kHz to 3.2 GHz with Option 1EH | –20 to +5 / –20 to +11 (+14) |
| 250 kHz to 3.2 GHz with Options UNW and 1EH | –20 to +5 / –20 to +8 (+11) |
| > 3.2 to 10 GHz | –20 to +5 / –20 to +14 (+21) |
| > 10 to 20 GHz | –20 to +5 / –20 to +14 (+17) |
| > 20 to 30 GHz | –20 to +5 / –20 to +11 (+17) |
| > 30 to 65 GHz | –20 to +5 / –20 to +11 (+14) |
| > 65 to 67 GHz | –20 to +5 / –20 to +10 (+14) |
| > 67 to 70 GHz | –20 to +5 (typ) / –20 to +8 (typ) |
| With step attenuator (Option 1E1), minimum settable output | Extends to –135 dBm (Options 520/532/540) or –110 dBm (Options 550/567) |
| Output | |
| Step attenuator (Options 520, 532, 540) | 0 dB and 5 dB to 115 dB in 10 dB steps |
| Step attenuator (Options 550, 567) | 0 dB to 90 dB in 10 dB steps |
| Amplitude switching speed (ALC on or off, without power search) | < 3 ms (typ) |
| Output impedance | 50 Ω (nom) |
| SWR (250 kHz to 2 GHz) | < 1.4:1 (typ) |
| SWR (> 2 GHz to 20 GHz) | < 1.6:1 (typ) |
| SWR (> 20 GHz to 40 GHz) | < 1.8:1 (typ) |
| SWR (> 40 GHz to 67 GHz) | < 2.0:1 (typ) |
| Maximum reverse power | 1/2 Watt, 0 VDC |
| Level Accuracy (dB) — ALC on, 15 to 35 °C | |
| 250 kHz to 2 GHz | ±0.6 (> +10 dBm); ±0.6 (+10 to 0 dBm); ±0.6 (0 to –10 dBm); ±1.4 (–10 to –20 dBm) |
| > 2 GHz to 20 GHz | ±0.8; ±0.8; ±0.8; ±1.2 |
| > 20 to 40 GHz | ±1.0; ±0.9; ±0.9; ±1.3 |
| > 40 to 50 GHz | ---; ±1.3; ±0.9; ±1.2 |
| > 50 to 67 GHz | ---; ±1.5; ±1.0; ±1.2 (typ) |
| Level accuracy resolution | 0.01 dB |
| Temperature stability | 0.01 dB/°C (typ) |
| Spectral Purity — Harmonics (dBc at +10 dBm or max specified output power, whichever is lower) | |
| < 10 MHz | –28 dBc (typical below 1 MHz) |
| 10 MHz to 2 GHz | –30 dBc |
| 10 MHz to 2 GHz (with Option 1EH filters on) | –55 dBc |
| > 2 GHz to 20 GHz | –55 dBc |
| > 20 GHz to 67 GHz (Option 532, 540, 550 & 567) | –50 dBc (typical) |
Important: Maximum reverse power at the RF output: 1/2 Watt, 0 VDC.
Important: Storage below –20 °C: instrument states may be lost.
Important: As is the case with all signal generation equipment, phase noise specifications are not warranted in a vibrating environment.
Important: Option UNW (Narrow pulse modulation) must be ordered with Option 1E1 (Step attenuator).
Important: Option HSM (Scan modulation) must be ordered with Option UNT and is not available with Option UNU.
Important: The OML millimeter source modules (E8257DS-series) must be ordered with Option 1EA.
Recommended pairing: use the Agilent 8757D scalar network analyzer with the analog ramp sweep (Option 007) for swept scalar network measurements.
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.
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