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The Agilent E4991A is an RF impedance/material analyzer that characterizes components and materials across a frequency range of 1 MHz to 3 GHz. It resolves a broad set of impedance parameters from a 7-mm connector at its test head, including |Z|, |Y|, series and parallel inductance (Ls, Lp), series and parallel capacitance (Cs, Cp), resistance (Rs, Rp), reactance (X), conductance (G), susceptance (B), dissipation factor (D), quality factor (Q), the impedance and admittance phase angles, and the reflection coefficient and its components.
An impedance analyzer applies a known RF stimulus to a device under test and resolves the resulting voltage and current into the component's complex impedance, letting an engineer extract values such as inductance, capacitance, and equivalent series resistance at the frequency where the part actually operates. The E4991A extends this approach to material characterization: when configured with the material measurement option it derives permittivity parameters (|er|, er', er", tand) and permeability parameters (|ur|, ur', ur", tand) from a material under test.
ValueTronics stocks and holds its own test-and-measurement inventory in a 20,000 sq ft secure warehouse at 1675 Cambridge Drive in Elgin, Illinois. Because we hold the equipment ourselves, every pre-owned unit is inspected and functionally verified in-house before it ships, while new units leave our warehouse factory-sealed exactly as received from the manufacturer.
Agilent Technologies was formed in 1999 as a spin-off of Hewlett-Packard's test and measurement business. In 2014, Agilent's electronic measurement operations were established as Keysight Technologies, which continues to support instruments originally introduced under the Agilent brand.
| Specification | Value |
|---|---|
| Measurement Parameters and Range | |
| Impedance parameters | |Z|, |Y|, Ls, Lp, Cs, Cp, Rs(R), Rp, X, G, B, D, Q, θz, θy, |Γ|, Γx, Γy, θγ |
| Material parameters (Option E4991A-002) | Permittivity: |εr|, εr', εr", tanδ; Permeability: |μr|, μr', μr", tanδ |
| Measurement range (|Z|) | 130 mΩ to 20 kΩ (Frequency = 1 MHz, point averaging factor ≥ 8, oscillator level = –3 dBm; = –13 dBm; or = –23 dBm, measurement accuracy ≤ ±10%) |
| Source Characteristics — Frequency | |
| Range | 1 MHz to 3 GHz |
| Resolution | 1 mHz |
| Accuracy (without Option E4991A-1D5) | ±10 ppm (23 °C ±5 °C); ±20 ppm (5 °C to 40 °C) |
| Accuracy (with Option E4991A-1D5) | ±1 ppm (5 °C to 40 °C) |
| Stability (with Option E4991A-1D5) | ±0.5 ppm/year (5 °C to 40 °C) (typical) |
| Source Characteristics — Oscillator Level | |
| Power range (50 Ω load at test port) | –40 dBm to 1 dBm (frequency ≤ 1 GHz); –40 dBm to 0 dBm (frequency > 1 GHz) |
| Current range (short at test port) | 0.0894 mArms to 10 mArms (frequency ≤ 1 GHz); 0.0894 mArms to 8.94 mArms (frequency > 1 GHz) |
| Voltage range (open at test port) | 4.47 mVrms to 502 mVrms (frequency ≤ 1 GHz); 4.47 mVrms to 447 mVrms (frequency > 1 GHz) |
| Resolution | 0.1 dB |
| Power accuracy (frequency ≤ 1 GHz) | ±2 dB (23 °C ±5 °C); ±4 dB (5 °C to 40 °C) |
| Power accuracy (frequency > 1 GHz) | ±3 dB (23 °C ±5 °C); ±5 dB (5 °C to 40 °C) |
| Output impedance | 50 Ω (nominal) |
| DC Bias (Option E4991A-001) | |
| DC voltage bias range | 0 to ±40 V |
| DC voltage bias resolution | 1 mV |
| DC voltage bias accuracy | ±{0.1% + 6 mV + (Idc[mA] x 20 Ω)[mV]} (23 °C ±5 °C); ±{0.2% + 12 mV + (Idc[mA] x 40 Ω)[mV]} (5 °C to 40 °C) |
| DC current bias range | 100 µA to 50 mA, –100 µA to –50 mA |
| DC current bias resolution | 10 µA |
| DC current bias accuracy | ±{0.2% + 20 µA + (Vdc[V] /10 kΩ)[mA]} (23 °C ±5 °C); ±{0.4% + 40 µA + (Vdc[V] /5 kΩ)[mA]} (5 °C to 40 °C) |
| Sweep Characteristics | |
| Sweep parameters | Frequency, oscillator level (power, voltage, current), DC bias voltage, DC bias current |
| Sweep range setup | Start/stop or center/span |
| Sweep types | Frequency sweep: linear, log, segment; Other parameters sweep: linear, log |
| Sweep mode | Continuous, single |
| Number of measurement points | 2 to 801 |
| Delay time range | 0 to 30 sec (resolution 1 msec) |
| Number of segments (segment sweep) | 1 to 16 |
| Trigger | |
| Trigger mode | Internal, external (external trigger input connector), bus (GPIB), manual (front key) |
| Averaging | |
| Types | Sweep-to-sweep averaging, point averaging |
| Sweep-to-sweep averaging range | 1 to 999 (integer) |
| Point averaging range | 1 to 100 (integer) |
| Display | |
| LCD type/size | Color LCD, 8.4 inch (21.3 cm) |
| Resolution | 640 (horizontal) × 480 (vertical) |
| Number of traces | Data trace: 3 scalar traces + 2 complex traces (maximum); Memory trace: 3 scalar traces + 2 complex traces (maximum) |
| Marker | |
| Main marker | One for each trace (marker 1) |
| Sub marker | Seven for each trace (marker 2 to marker 8) |
| Reference marker | One for each trace (marker R) |
| Mass Storage | |
| Built-in flexible disk drive | 3.5 inch, 720 KByte or 1.44 MByte, DOS format |
| Hard disk drive | 2 GByte (minimum) |
| Interface | |
| GPIB | IEEE 488.1-1987, IEEE 488.2-1987 |
| Printer parallel port | IEEE 1284 Centronics, 25-pin D-sub connector, female |
| LAN interface | 10 Base-T or 100 Base-TX (automatically switched), Ethertwist, RJ45 connector, TCP/IP, FTP |
| USB port | USB 1.1, Standard USB A, female |
| Rear Panel Connectors | |
| External reference signal input | 10 MHz ±10 ppm (typical), level 0 dBm to +6 dBm (typical), 50 Ω (nominal), BNC female |
| Internal reference signal output | 10 MHz (nominal), level +2 dBm (nominal), 50 Ω (nominal), BNC female |
| High stability frequency reference output (Option E4991A-1D5) | 10 MHz (nominal), level +2 dBm (nominal), 50 Ω (nominal), BNC female |
| Measurement Terminal (At Test Head) | |
| Connector type | 7-mm connector |
| General Characteristics | |
| Operating temperature | 5 °C to 40 °C |
| Operating humidity | Flexible disk drive non-operating: 15% to 90% RH; operating: 20% to 80% RH (at wet bulb temperature ≤ 29 °C, without condensation) |
| Operating altitude | 0 m to 2,000 m (0 feet to 6,561 feet) |
| Operating vibration | 0.5 G maximum, 5 Hz to 500 Hz |
| Warm-up time | 30 minutes |
| Storage temperature | –20 °C to +60 °C |
| Storage humidity | 15% to 90% RH (at wet bulb temperature ≤ 45 °C, without condensation) |
| Storage altitude | 0 m to 4,572 m (0 feet to 15,000 feet) |
| Storage vibration | 1 G maximum, 5 Hz to 500 Hz |
| Power requirements | 90 V to 132 V, or 198 V to 264 V (automatically switched), 47 Hz to 63 Hz, 350 VA maximum |
| Weight | Main unit: 17 kg (nominal); Test head: 1 kg (nominal) |
| Other Specifications | |
| EMC | European Council Directive 89/336/EEC; IEC 61326-1:1997+A1; CISPR 11:1990 / EN 55011:1991 Group 1, Class A; AS/NZS 2064.1/2 Group 1, Class A |
| Safety | European Council Directive 73/23/EEC; IEC 61010-1:1990+A1+A2 / EN 61010-1:1993+A2, Installation Category II, Pollution Degree 2, Indoor Use; IEC60825-1:1994 Class 1 LED Product; CAN/CSA C22.2 No. 1010.1-92 |
Important: Setting an oscillator level above 0 dBm (447 mV, 8.94 mA) is possible at frequencies above 1 GHz, but the characteristics at this setting are not guaranteed.
Important: Material measurement (Option E4991A-002) requires the Agilent 16453A or 16454A test fixture (1 MHz to 1 GHz, typical); these test fixtures are not part of the standard furnished accessories and must be ordered separately.
Important: The supplied CD-ROM includes an operation manual, an installation and quick start guide, and a programming manual. A service manual is not included.
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
Keysight Technologies
Imp_met_freq
1 MHz to 3 GHz
Agilent 16453A Dielectric Material Test Fixture for 4291B (Pre-Owned)
16453A
30+ Years in Business
Secure Payments
Sell Test Equipments
Knowledgeable Staff
On-site Lab
30+ Years in Business
Secure Payments
Sell Test Equipments
Knowledgeable Staff
On-site Lab
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