Wrc-1992 Diagram Calculator ✔ 〈Certified〉

| Band number | Frequency | ITU region difference example | |-------------|-----------|-------------------------------| | 4 (VLF) | 3–30 kHz | No major differences | | 5 (LF) | 30–300 kHz | 148.5–283.5 kHz: Broadcasting (Reg. 1) / Fixed, Mobile (Reg. 2) | | 6 (MF) | 300–3000 kHz | 525–1606.5 kHz: Broadcasting (all regions) | | 7 (HF) | 3–30 MHz | 5.9–6.2 MHz: Broadcasting vs Fixed variations | | 8 (VHF) | 30–300 MHz | 174–230 MHz: TV Broadcasting (Reg. 1) / Fixed, Mobile (Reg. 2) | | 9 (UHF) | 300–3000 MHz | 470–806 MHz: Broadcasting terrestrial priority in Reg. 1 | | 10 (SHF) | 3–30 GHz | Uniform allocations for satellite services | | 11 (EHF) | 30–300 GHz | Uniform |

The calculator emulates the WRC-1992 diagrams – nomographs relating field strength, distance, frequency, and time percentage. The main steps: wrc-1992 diagram calculator

| Feature | WRC-1992 (Bulletin 107) | PD 5500 (UK) | ASME Section VIII Div. 2 | |---------|------------------------|--------------|---------------------------| | Scope | Cylinder-cylinder intersections | Cylinder-cylinder and flat head | Vessels + nozzles | | Output | Peak stress for fatigue | Mean stress for plasticity collapse | Equivalent stress | | Calculator type | Four-quadrant diagram | Analytical formulas | Tables + FEA alternative | | τ correction | Fig. 4 (non-dimensional) | Correction factor Q | Not directly included | | Band number | Frequency | ITU region

| Type | Description | |------|-------------| | Spreadsheet calculator | Excel with embedded lookup tables for curves. | | Online web calculator | Some regulatory sites offer legacy WRC‑92 modules. | | Python script | Reprogram the curve equations (polynomial fits from the original Report 238‑6). | | ITU‑R P.370 (old) | Superseded by P.1546, but WRC‑92 still references the older method. | | Feature | WRC-1992 (Bulletin 107) | PD

⚠️ Note: Modern planning uses ITU‑R P.1546, but some legacy licenses require WRC‑92 checks.

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| Band number | Frequency | ITU region difference example | |-------------|-----------|-------------------------------| | 4 (VLF) | 3–30 kHz | No major differences | | 5 (LF) | 30–300 kHz | 148.5–283.5 kHz: Broadcasting (Reg. 1) / Fixed, Mobile (Reg. 2) | | 6 (MF) | 300–3000 kHz | 525–1606.5 kHz: Broadcasting (all regions) | | 7 (HF) | 3–30 MHz | 5.9–6.2 MHz: Broadcasting vs Fixed variations | | 8 (VHF) | 30–300 MHz | 174–230 MHz: TV Broadcasting (Reg. 1) / Fixed, Mobile (Reg. 2) | | 9 (UHF) | 300–3000 MHz | 470–806 MHz: Broadcasting terrestrial priority in Reg. 1 | | 10 (SHF) | 3–30 GHz | Uniform allocations for satellite services | | 11 (EHF) | 30–300 GHz | Uniform |

The calculator emulates the WRC-1992 diagrams – nomographs relating field strength, distance, frequency, and time percentage. The main steps:

| Feature | WRC-1992 (Bulletin 107) | PD 5500 (UK) | ASME Section VIII Div. 2 | |---------|------------------------|--------------|---------------------------| | Scope | Cylinder-cylinder intersections | Cylinder-cylinder and flat head | Vessels + nozzles | | Output | Peak stress for fatigue | Mean stress for plasticity collapse | Equivalent stress | | Calculator type | Four-quadrant diagram | Analytical formulas | Tables + FEA alternative | | τ correction | Fig. 4 (non-dimensional) | Correction factor Q | Not directly included |

| Type | Description | |------|-------------| | Spreadsheet calculator | Excel with embedded lookup tables for curves. | | Online web calculator | Some regulatory sites offer legacy WRC‑92 modules. | | Python script | Reprogram the curve equations (polynomial fits from the original Report 238‑6). | | ITU‑R P.370 (old) | Superseded by P.1546, but WRC‑92 still references the older method. |

⚠️ Note: Modern planning uses ITU‑R P.1546, but some legacy licenses require WRC‑92 checks.