5/01/15: Take a look at VDI's High Test Port Power VNA Extension Modules.
For WR15, WR12, and WR10 bands, high test port power options are available. Please contact VDI for pricing and delivery options. See specifications and sample data for the WR12 High Test Port Power VNAX Module.
Available options include micrometer driven attenuator, increased cable length, and waveguide based calibration kit.
Contact VDI for additional details and information.