Rohde ZVC multi-port VNA. Good condition , recently calibrated. B21, B23, B24, B25 options. 

From the manufacturer :

Description

The Rohde & Schwarz ZVC network analyzer is an instrument which measures the complex transmission and reflection characteristics of two-port devices in the frequency domain. It does this by sampling the incident signal, separating the transmitted and reflected waves, and then performing ratios that are directly related to the reflection and transmission coefficients of the two-port. Frequency is swept to rapidly obtain amplitude and phase information over a band of frequencies of interest.

Rohde & Schwarz ZVC network analyzers utilize synthesized-frequency sources to provide a known test stimulus that can sweep across a range of frequencies or power levels. Rohde & Schwarz ZVC network analyzers also can perform ratioed measurements (including phase), which require multiple receivers. The Rohde & Schwarz ZVC can provide a wealth of knowledge about a device under test (DUT), including its magnitude, phase, and group-delay response.

The family comprises the five Vector Network Analyzers ZVRL, ZVRE and ZVR as well as ZVCE and ZVC which extend the frequency range to 8 GHz. All models are compact instruments with integrated generator, test set and receiver, each tailored to a different field of application. All analyzers can be subsequently upgraded to the higher-class models ZVR and ZVC comprise a test set with two SWR bridges (ZVR) or directional couplers (ZVC), an RF switch, two measurement channels and - unlike ZVRE and ZVCE - two reference channels. With this configuration a variety of novel calibration procedures, e.g. TNA, can be performed, which considerably improve the accuracy particularly in non-coaxial applications. ZVR and ZVC are the allrounders of the family and suitable for applications in R&D and production no matter how sophisticated.

Additional Features:

Excellent dynamic range

Low inherent noise

Broad frequency range for universal use

High Measurement Speed

Fast data transfer via IEC/IEEE bus

Customized models for special applications

Manual calibration techniques: TOM, TRM, TRL, TNA, TOSM, TOM-X

Automatic calibration: AutoKal

Compatibility with PC, CAE: Internal PC with Windows NT operating system suitable for PC applications

With a bidirectional analyzer all four S-parameters of the DUT can be determined without changing connections

The 4-channel analyzer provides the calibration methods TOM, TRM, TRL, TNA and TOM-X

Specifications

Frequency Range: 20 kHz-8 GHz

High measurement speed: <125 μs/point

Fast IEC/IEEE bus: <15 ms

High frequency resolution: 10 μHz

Short calibration times: <20 s

Large display: active 26 cm color LCD

Integral Test Set: S-Parameter

Source Frequency Resolution: 0.00001 Hz

Maximum Output Power: 1 mW

Power Resolution: 0.1 dB

Output Impedance: 50 Ohm

No. of Receiver Channels: 4

Dynamic Range: 60 dB-120dB

Displayed Average Noise: -100 dBm to -75 dBm

Maximum Input Decibel: 0 dBm

Programmability/Connectivity of the ZVC

User Interface: Proprietary

Ports to Peripheral Devices: IEEE488, RS232C

Programming Language: SCPI

Located in the Bay Area - prefer local pick up if possible 

No shipping outside of the USA