Keysight 85099C Type-F RF 2-Port Electronic Calibration Module

Key Features At A Glance

• Single-connection two-port calibration using fully traceable, NIST-referenced electronic standards stored in module memory
• Frequency coverage from 10 MHz to 50 GHz on 2.4 mm interface for microwave and millimeter-wave VNA calibration
• Stored S-parameter data enables the analyzer to compute error terms from one connection rather than multiple mechanical standards
• USB interface to PNA and ENA series analyzers; analyzer auto-detects module type, frequency range, and connector configuration
• Available with male/female, male/male, or female/female port configurations (Options M0F, 00M, 00F) for insertable or non-insertable DUT pairing
• Maximum typical input power -5 dBm and maximum DC level ±10 V at the test port per the published input limits
• Operating temperature range 20 °C to 26 °C with measurement calibration valid within ±1 °C of the calibration temperature

The Keysight N4693A is a 2.4 mm two-port Electronic Calibration (ECal) module covering 10 MHz to 50 GHz. ECal is a precision single-connection calibration technique that uses fully traceable, verifiable electronic standards. Each module carries unique S-parameter data in its internal memory, which the network analyzer reads during calibration to compute its error terms. The N4693A is part of Keysight's microwave two-port ECal family, alongside companion 2.92 mm, 1.85 mm, 3.5 mm, Type-N, and 7 mm modules that share the same operating concept.

The documented purpose of an ECal module is to perform vector network analyzer calibration with substantially fewer connections than a mechanical SOLT calibration. The reference material illustrates that a four-port SOLT calibration with mechanical standards requires a minimum of eighteen connections across twelve one-port standards and three two-port thru standards, whereas an ECal-based calibration of the equivalent port count requires only the connections to the module ports themselves. For a two-port calibration on the N4693A, both analyzer test ports connect to the module and the calibration proceeds from the stored standards. Supported calibration types on compatible analyzers include 1-Port Reflection, Full 2-Port, Full 3-Port, Full 4-Port, Enhanced Response, and QSOLT, with advanced settings such as Adapter Removal, Flush (zero length) Thru, Unknown Thru, and User-Characterization where supported by the host analyzer.

ValueTronics International, LLC operates a 20,000 sq ft secure warehouse and verification facility at 1675 Cambridge Drive, Elgin, Illinois, where every instrument we sell is received, inspected, and held under controlled conditions. As an authorized distributor for Keysight Technologies, we supply both new and verified pre-owned ECal modules with the documentation and condition transparency that calibration labs and metrology teams need for incoming acceptance. The Elgin facility is the single point of accountability behind every order, and the staff who handle, test, and ship your module are the same people you can reach directly with questions about its condition or configuration.

Brand Heritage

Keysight Technologies was established in 2014 when Agilent Technologies spun off its electronic measurement business as a separate company. Agilent itself had been formed in 1999 when Hewlett-Packard separated its test and measurement operations from its computing business. ECal modules sold today under the Keysight name carry forward the product line and design lineage from the HP and Agilent eras, which is why older modules in the field may carry HP or Agilent branding while being supported under the current Keysight product family.

Compare Other Models in This Series

The Keysight microwave two-port ECal family comprises the N4690B and N4690C (Type-N 50 Ω, 300 kHz to 18 GHz), N4691B (3.5 mm, 300 kHz to 26.5 GHz), N4692A (2.92 mm, 10 MHz to 40 GHz), N4693A (2.4 mm, 10 MHz to 50 GHz), N4694A (1.85 mm, 10 MHz to 67 GHz), and N4696B (7 mm, 300 kHz to 18 GHz). All share the same single-connection electronic-calibration concept, USB interface to PNA and ENA analyzers, and the same 20 °C to 26 °C operating temperature window.

Within this family, the connector interface sets both the upper frequency limit and the mechanical handling requirements. The N4693A occupies the 2.4 mm slot at 50 GHz, sitting between the 2.92 mm N4692A at 40 GHz and the 1.85 mm N4694A at 67 GHz.

Each new model below is listed on its own product page with condition-matched pricing and accessory configuration. Where a sibling model appears on a separate page, that page describes its specific connector type, frequency coverage, and included accessories independently.

The N4693A is the 2.4 mm member of the family and the lowest-frequency module in the precision sub-millimeter-wave group; its 50 GHz upper limit covers applications that cannot be reached on the 2.92 mm N4692A but do not require the 67 GHz coverage of the 1.85 mm N4694A. The reference performance table for the N4693A shows its strongest characterized region in the 200 MHz to 2 GHz band, where directivity reaches 51 dB and reflection tracking is ±0.03 dB.

The primary axis of differentiation across the microwave two-port family is upper frequency limit, which is determined by the connector interface. The N4690B/C (Type-N) and N4696B (7 mm) cover 300 kHz to 18 GHz; the N4691B (3.5 mm) extends to 26.5 GHz; the N4692A (2.92 mm) reaches 40 GHz; the N4693A (2.4 mm) reaches 50 GHz; and the N4694A (1.85 mm) reaches 67 GHz. The 10 MHz low-end is shared by the N4692A, N4693A, and N4694A, while the larger-connector models begin at 300 kHz.

All six modules share the same calibration concept, the same USB interface to the host analyzer, the same operating temperature window of 20 °C to 26 °C, and the same option scheme (00M, 00F, M0F port configurations, plus Option 00A for matching adapters and Option UK6 for a measured-data calibration certificate). The comparison table that follows lists frequency coverage and connector type for each model side by side.

Model	Connector Type	Frequency Range	Ports
85099C	Type-F	300 kHz to 3 GHz	2-Port
85091C	7 mm	300 kHz to 9 GHz	2-Port
85092C	Type-N 50 Ohm	300 kHz to 9 GHz	2-Port
85093C	3.5 mm	300 kHz to 9 GHz	2-Port

Additional differences in specifications beyond the few shown above are not listed here — see each model's full specifications below.

Accessories Supplied

• RF Module, Type-F (85099-60009)
• Type F Wrench (8710-1841)
• USB A-B Cable, 1.8 m (8121-0506)
• Reference Guide (N4693-90001)

Product Core & Specifications

Specification	Limits
Operating Temperature (8509xC series)	+20 °C to +30 °C
Operating Temperature (N443xA/B series)	+20 °C to +30 °C
Operating Temperature (N469xA/B/C series)	+20 °C to +26 °C
Storage Temperature	–40 °C to +70 °C
Error-corrected range	±1 °C of measurement calibration temperature
Relative Humidity	Type tested, 0% to 95% at 40°C, non-condensing
Typical Maximum Input Power (8509x)	+9.0 dBm
Typical Maximum Input Power (N4431x)	+7.0 dBm
Typical Maximum Input Power (N4432A/N4433A)	−7.0 dBm
Typical Maximum Input Power (N469xA/B/C)	−5.0 dBm
Typical Maximum DC Level (8509x)	±20 Volts
Typical Maximum DC Level (N4431x)	±3 Volts
Typical Maximum DC Level (N4432A/N4433A)	±3 Volts
Typical Maximum DC Level (N469xA/B/C)	±10 Volts
Typical Damage Level (8509x, N4431x, N4432A/N4433A)	+20.0 dBm
Typical Damage Level (N469xA/B/C)	+10.0 dBm
Interface	USB
Recommended Recertification Interval	12 months

Important: Maximum input at the test port: typical maximum input power -5 dBm, typical maximum DC level ±10 V, typical damage level +10 dBm. Operating temperature range: 20 °C to 26 °C; measurement calibration is valid within ±1 °C of the calibration temperature.Important: Only Keysight calibration laboratories use the most accurate reference standards - directly traceable to national and international primary standards - to calibrate ECal modules to their warranted specifications. Calibration services performed by unauthorized calibration service providers will cause ECal modules to perform substantially below specifications.Important: The suggested interval for recertification is 12 months.Important: ECal modules require a compatible Keysight PNA or ENA series network analyzer with USB interface for operation. Performance from 9 kHz to 300 kHz on the N4431B is valid only for the E5071C ENA network analyzer with firmware version A.09.10 or higher. PNA firmware revision 3.0 is required for use with N4692A, N4693A, and N4694A modules.Important: ECal modules can be damaged if excessive torque is applied to the connectors. Use the specified torque wrench and settings for each connector type.Important: Protection against electrostatic discharge (ESD) is essential while handling and operating the ECal module. Static discharges too small to be felt can cause permanent damage to the unit.Important: Pin depth gages for measuring recession or protrusion are not provided in the kit and must be ordered separately.Important: VNA analyzers, the 85097B Interface Kit, and the 8121-1047 adapter cable are discontinued products; the VNA connection section in the manual is for reference only.Important: Terminate any unused ECal ports with a 50 ohm load for optimal performance.Recommended pairing: when calibrating a non-insertable 2.4 mm DUT, the N4693A is available in -m-/-m- (Option 00M) and -f-/-f- (Option 00F) port configurations as listed in the reference, eliminating the need for a separate adapter-removal step on the analyzer.

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.