Agilent
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The E 8257 D operates as a fully synthesized signal generator, meaning it generates signals by synthesizing from a reference oscillator.[1][2][3]
The instrument uses an internal timebase reference oscillator, an oven-controlled crystal oscillator (OCXO), for frequency accuracy.[1][2]
The E 8257 D supports step (digital) sweep, list sweep, and optional ramp (analog) sweep operating modes.[1][2][3]
The E 8257 D can be remotely programmed using GPIB, RS-232, and 10BaseT LAN interfaces, and it supports the SCPI 1997.0 control language.[2][3]
The E 8257 D includes an internal diagnostic self-test routine that tests most modules.[2][3]
| Designation | Generation | Vintage | Changes | Source |
|---|---|---|---|---|
| E8257D-520 | — | — | Frequency range from 250 kHz to 20 GHz | assets.testequity.com[2] |
| E8257D-521 | — | — | Ultrahigh output power, frequency range from 10 MHz to 20 GHz | assets-us-01.kc-usercontent.com[3] |
| E8257D-532 | — | — | Frequency range from 250 kHz to 31.8 GHz | assets.testequity.com[2] |
| E8257D-540 | — | — | Frequency range from 250 kHz to 40 GHz | assets.testequity.com[2] |
| E8257D-550 | — | — | Frequency range from 250 kHz to 50 GHz | assets.testequity.com[2] |
| E8257D-567 | — | — | Frequency range from 250 kHz to 67 GHz | assets.testequity.com[2] |
| E8257D-007 | — | — | Analog ramp sweep | assets.testequity.com[2] |
| E8257D-008 | — | — | 8 GB removable flash memory | assets-us-01.kc-usercontent.com[3] |
| E8257D-UNX | — | — | Ultra low phase noise | assets.testequity.com[2] |
| E8257D-UNY | — | — | Enhanced ultra low phase noise | assets-us-01.kc-usercontent.com[3] |
| E8257D-UNT | — | — | AM, FM, phase modulation, and LF output | assets.testequity.com[2] |
| E8257D-UNU | — | — | Pulse modulation | assets.testequity.com[2] |
| E8257D-UNW | — | — | Narrow pulse modulation | assets-us-01.kc-usercontent.com[3] |
| E8257D-1E1 | — | — | Step attenuator | assets.testequity.com[2] |
| E8257D-1ED | — | — | Type-N (f) RF output connector (Option 520 and 521 only) | assets-us-01.kc-usercontent.com[3] |
| E8257D-1EH | — | — | Improved harmonics below 2 GHz (low-pass filters standard with Option 521) | assets-us-01.kc-usercontent.com[3] |
| E8257D-1EM | — | — | Moves all front panel connectors to the rear panel | assets.testequity.com[2] |
| E8257D-1EU | — | — | High output power (standard with Option 521) | assets-us-01.kc-usercontent.com[3] |
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The Agilent E 8257 D is available with several frequency options: Option 513 covers 250 kHz to 13 GHz, Option 520 covers 250 kHz to 20 GHz, Option 521 covers 10 MHz to 20 GHz, Option 532 covers 250 kHz to 31.8 GHz, Option 540 covers 250 kHz to 40 GHz, Option 550 covers 250 kHz to 50 GHz, and Option 567 covers 250 kHz to 67 GHz (operational up to 70 GHz).[1][2][3]
The following facts about the E 8257 D Analog Signal are absent from this record as of this revision. First-hand knowledge or a citation closes a gap; every submission is reviewed before publication.
No publicly documented production dates or lifecycle milestones (introduction, end of production, EOL) for the E 8257 D Analog Signal are on record.
Answerable by: OEM historical records or a trade-press announcement
The control-system platform and OS era of the E 8257 D Analog Signal are not on record.
Answerable by: an engineer who operated it or OEM installation records
No publicly documented failure modes or field errata for the E 8257 D Analog Signal are on record.
Answerable by: a field service engineer, process engineer, or maintenance technician
The process node or technology generation of the E 8257 D Analog Signal is not on record.
Answerable by: an OEM datasheet or a fab qualification report
No publicly documented compatible parts, consumables, or accessories for the E 8257 D Analog Signal are on record.
Answerable by: an OEM parts catalog or a service engineer
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Last updated Sep 30, 2026.
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