Hewlett Packard V85104A Test Set Module
The HP V85104A test set module is an S‑parameter millimeter‑wave test set — a modular RF/microwave component originally designed to work with larger network analyzer systems (like the HP/Agilent/Keysight 85105A controller) for high‑frequency measurements.
- Used in vector network analyzer (VNA) systems: Test sets like the V85104A are part of the measurement chain that routes RF/microwave signals to and from a device under test (DUT) and isolates forward/reflected waves for S‑parameter analysis.
- Millimeter‑wave frequency coverage: The V85104A specifically covers the ~50 GHz to 75 GHz frequency band and uses WR‑15 waveguide interfaces (WR‑15 indicates the standard waveguide size for that band).
- Typically two of these modules (one for each port/band) are used together with the network analyzer controller to fully characterize S‑parameters.
Excellent Condition. With waveguide adapters shown. No manuals or other accessories. Carefully removed from operational equipment.









