VNAX

*The dynamic range specifications assume that low phase sources are used, like those used in the modern Keysight PNA / PNA-X analyzers
with DDS synthesizers. While compatible, other VNAs may reduce dynamic range.

**WM164 (WR0.65) performance is specified for a TxRx-Rx configuration. Performance of a TxRx-TxRx configuration is estimated to have a 
~15 dB degradation of dynamic range and may additionally require the use of a mmWave controller. 

^†Test Port Input Powers exceeding the peak Test Port Power of the TxRx or TxRef module will compress the module.

General Notes: 

Extension modules are compatible with all modern VNAs. Please consult with VDI to discuss VNA and module configurations that will yield the best performance for your application.

 
Technical Notes:

1. Test Port Power is typical, reduced power is possible at band edges. 

2. Stability is specified for 1 hour after system warm-up, in stable environment with ideal cables.

3. Specifications assume a through measurement with two TxRx heads.

4. Specifications are measured on a Keysight PNA/PNAX with front panel connection at 25°C typical.

5. The dynamic range (RBW=10Hz) is measured by first connecting two TxRx modules together and normalizing the un-calibrated S21 & S12. The heads are then disconnected and terminated with a waveguide short. The RMS average of 10 sweeps of the measured S21 & S12 gives the system dynamic range.

6. Typical Module Dimensions exclude testport (2" standard testport for all modules except WM250 (WR1.0), where a 1" testport is used)

^‡Where noted, Extended Frequency Coverage applies; module performance within the standard band conforms to standard specifications while performance in the extended regions can be degraded as follows:

-The minimum and typical dynamic range is degraded by 10dB or less, compared to the specification for the standard band, with the exception of WR5.1.

-For WR5.1, the minimum dynamic range is 95dB (15dB degradation compared to the standard band specification). 

-The test port power typical across the extended band is degraded by 5 dB or less compared to the specification for the standard band. 

Contact [email protected] for more information.

PXI VNAX

PXI VNAX

VDI offers VNAX module configurations that are compatible with the Keysight PXI or Streamline VNA product lines. For specifications, please refer to page 5 of this Keysight document for the latest specifications. The specifications listed below are accurate as of May 9, 2023. The VNAX-AM (Streamline VNA to VNAX Adapter Module) may be required for some configurations 

*VNAX-AM (Streamline VNA to VNAX Adapter Module) is required to operate Standard VDI VNAX Modules with
Keysight Streamline or PXI VNA.

HIGH POWER

High Power VNAX Configuration

VDI offers VNA Frequency Extension Modules with Higher Test Port Power compared to the standard VNAX modules. The High Power VNAX modules conform to all other standard S-parameter performance specifications. The typical and minimum dynamic range may be slightly reduced. 

 Additional high power options and frequency bands are available.

 Contact [email protected] for more information. 

CAL KITS

Calibration Kits

VDI offers banded waveguide calibration kits for s-parameter calibration of our extension modules. Two different calibration techniques are offered dependent upon the frequency of operation: TRL (Through-Reflect-Line) calibrations for WR28 through WR3.4; SOLT (Short-Open-Load-Through) calibrations for WR2.8 through WR1.0. VDI only manufactures Type B versions of the calibration standards to support both QW (Quarter Wave Delay Shim) and QD (Quarter Wave Delay Short) standards. These standard versions are described here. Information about Type A calibration standards are included in the VNAX Manual. Electronic calibration kit definitions are available for download below.  

Use the image below to identify the correct type of calibration kit needed.

 

 

Click below to download the appropriate cal kit definition file (in zipped format):
	Keysight Type B download
	Anritsu Type B download
Rohde&Schwarz	R&S Type B download
	Copper Mountain Type B download

    Type A Calibration Kits have been discontinued but Type A Calibration Kit Definitions may
    still be downloaded here.

    Questions? Contact VDI at [email protected]

DUAL SOURCE

Dual Source Module Option

The Dual Source (DS) option for VDI VNAX modules adds a second source module and a directional coupler into the standard TxRx Module (see block diagram below). This enables two-tone measurements to allow users to characterize device linearity. VNAX-DS modules have slightly reduced test port power and dynamic range compared to standard VNAX modules. VNAX-DS modules conform to all other standard
S-parameter performance specifications. Specifications listed below are specific for the DS option. For setup instructions or other information about our VNAX-DS Modules, please Contact VDI. For more information on VDI VNAX Modules, please refer to VDI-707.1 (VNAX Product Manual) located under the Resources tab.

The -3DB Option includes a 3dB combining coupler instead of a 6dB combining coupler. With the -3DB option, the Test Port Power imbalance between Source 1 and Source 2 is reduced while sacrificing maximum test port power compared to the standard configuration. 
 

^‡Where noted, Extended Frequency Coverage applies; module performance within the standard band conforms
to standard specifications while performance in the extended regions can be degraded as follows:

-The minimum and typical dynamic range is degraded by 10dB or less, compared to the specification for the
standard band.

-The test port power typical across the extended band is degraded by 5dB or less compared to the specification
for the standard band.

DUAL RX

Dual RX Option

For VDI Mini Rx Modules, VDI offers a Dual Rx configuration. The Dual Rx Module integrates two Rx chains in the same enclosure, with 1.375” center-to-center spacing between the test ports. Each Rx chain meets the standard specifications for Rx modules.  

  Contact VDI for additional information and details.

RESOURCES