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Quick Start

Hardware version

CANBench TrueZ v1.1 — Fabricated prototype, sole built unit. V1.1 is electrically identical to the V1.2 schematic refresh but predates the InvenTree symbol-library migration; the schematic component metadata reflects legacy SCADYS naming. Testing and bench validation reference this V1.1 hardware.

Other versions: v1.2 — schematic refresh (next version)

Five-step setup. The TrueZ is passive — there is nothing to power on. It sits between a CANBench Duo LISN and your analyser.

  1. Set up the CANBench Duo per its own Quick Start — bench supply in, DUT connected, status LED green.
  2. Cable the two LISN outputs into the TrueZ inputs using two identical SMA cables (same type, same length): Duo LISN+ → TrueZ LISN+ (J2), Duo LISN− → TrueZ LISN− (J3). Cable matching is not optional — skew between the two feeds converts differential-mode into common-mode and vice-versa, corrupting the separation.
  3. Connect the analyser to one TrueZ output — CM-25Ω (J4) or DM-100Ω (J5) — and terminate the other output with 50 Ω.
  4. Confirm the analyser input is 50 Ω. The CM-25Ω / DM-100Ω measurement conditions are only valid into a 50 Ω input; a high-impedance scope input invalidates them.
  5. Sweep per the Measurement Procedure, swapping the analyser between the CM and DM outputs to capture each mode.

For the analyser configuration see Spectrum-Analyser Setup; for what the traces mean see Interpreting Results.