# 📐 L2 Spec — NMR 1D Peak-Picking Spec
**ID:** `L2-146-001` · **Status:** ⊙ Testnet (genesis catalog)
**Parents:** ⬆ Principle [`L1-146`](/artifact/l1/L1-146)
> **🎯 Tolerance (ε):** expression
> **⚖ Difficulty score:** 0.45 · **Delta tier:** 5
> **⛓ On-chain block:** 41554231
---
## 1. Domain Ω
**Type:** `range`
| Parameter | Unit | Range |
|---|---|---|
| K | — | 1 – 200 |
| N | — | 1024 – 262144 |
| B0 mhz | MHz | 60 – 1200 |
| Snr db | dB | -5 – 50 |
| Baseline roll | — | 0.0 – 0.2 |
| Phase distortion | — | 0.0 – 0.5 |
| B1 miscalibration | — | 0.0 – 0.3 |
| B0 inhomogeneity hz | Hz | 0.0 – 20 |
| Solvent suppression residual | — | 0.0 – 0.1 |
## 2. Tolerance (ε)
**Type:** `fn`
```
0.001 + 0.01 * b0_inhomogeneity_hz / 10 + 0.02 * phase_distortion + 0.01 * solvent_suppression_residual + 0.01 * baseline_roll
```
## 3. Difficulty
| Property | Value |
|---|---|
| Difficulty score | 0.45 |
| Delta tier | 5 |
## 4. Fingerprint
`cbeeee5eb89d905064e3c7e342eac3c7934102f31425e43924426f5aa3c3eb61`
## 5. On-chain Registration
- **Chain hash:** `0x0df38bcdda78b2729afbc48c67b87ca7c5e850426be2bae9a30e5e61b83eaaae`
- **Chain tx hash:** `0xde64cbfdc17278d84cad5e826a9e5963b85e794ac0bac3dce25e8f2db4f52367`
- **Chain block:** `41554231`
---
## File Mapping
This bundle consists of: `L2-146-001.md`, `L2-146-001.json`.
| File | Role | How to regenerate |
|------|------|-------------------|
| `L2-146-001.md` | Source of truth — edit this | Human or LLM |
| `L2-146-001.json` | Structured metadata for the registry | LLM regenerates from the sections above |
**Prompt for your LLM after editing this Markdown:**
> Read the attached Markdown. Regenerate the sibling `.json` so every field matches.
> Preserve the schema documented in the rows above.
> Output each file in its own fenced code block tagged with the filename.
> Output only the JSON object.
_This Markdown was auto-synthesized from the catalog row for `L2-146-001`._
_Edit it, regenerate the JSON, and submit at [/submit](/submit) to claim the artifact._