Agilent 54855-61620 Calibration Cable Assy

The Agilent (Keysight) 54855‑61620 is a dedicated calibration cable assembly—specifically, a Sucoflex 104PEA 50 Ω coaxial cable—for use with Infiniium oscilloscopes (models 54853A, 54854A, 54855A and other ≥6 GHz variants). It’s essential for performing on‑board self‑calibration and probe deskew procedures.

📌 What it is & what it does

• Certified Calibration Cable: You must use the 54855‑61620 assembly—along with two 54855‑67604 precision 3.5 mm adapters—for accuracy calibration of bandwidths ≥6 GHz. It ensures channel sensitivity, offset, trigger, and time‑scale calibration are accurate.

• Probe Deskew Support: Required for true probe deskew on compatible scopes, especially when calibrating or aligning high‑speed probe heads. 

🔧 Typical Use Cases

1. Self-calibration:
   Follow Utilities → Calibration routine—connect the 54855‑61620 between Aux Out and channels to perform full calibration, including time‑scale if selected.

2. Probe Calibration and Deskewing:
   When setting up 3.5 GHz+ probes (e.g., Agilent 1168A), the cable plus adapters ensures proper signal path and accurate skew adjustment.