Semi-Finished Coaxial Cable —RG7 CU/48/AL
1. Cable Structure (No Outer Jacket)
| Component | Specification |
|---|---|
| Inner Conductor | Solid bare copper (CU), Ø ≈ 1.13 – 1.20 mm |
| Dielectric | Gas-injected or solid foamed polyethylene (FPE), Ø ≈ 5.0 – 5.3 mm |
| First Shield | Aluminum-polyester foil, bonded, 100% coverage |
| Second Shield | 48-wire aluminum braid, ~70–75% optical coverage |
| Outer Jacket | Not included – for customer-side extrusion (PVC, LSZH, PE, etc.) |
Optional features: steel messenger wire, water-blocking gel layer, or central ripcord.
2. Electrical & Performance Characteristics (@100 MHz)
| Parameter | Typical Value |
|---|---|
| Impedance | 75 ± 3 ohms |
| Capacitance | ~53 – 55 pF/m |
| Velocity of Propagation | ≥ 83% |
| Attenuation | ≤ 8.5 dB/100m |
| Return Loss | ≥ 18 – 20 dB |
| Shielding Effectiveness | ≥ 35 – 40 dB |
| DC Resistance (Inner Conductor) | ≤ 21 ohm/km |
Performance may vary depending on braid pitch, dielectric density, and final jacket application.
3. Key Advantages
1. Solid Copper Core for Reliable Signal Transmission
Guarantees low attenuation, excellent conductivity, and stable performance over extended lengths
Supports broadband, HD analog CCTV, and satellite signal transmission
2. 48-Wire Aluminum Braid – Standard EMI Protection
Delivers ~70–75% coverage
Sufficient for indoor and low-to-moderate EMI environments, such as residential buildings, schools, and small business premises
3. Cost-Effective OEM Solution
Aluminum braid offers lighter weight and lower cost than copper or CCA alternatives
Designed for manufacturers targeting price-sensitive markets without sacrificing essential performance
4. Custom Jacketing Compatibility
Supports downstream jacketing with:
PVC (general indoor use)
LSZH (fire-rated environments, CPR Dca/Cca )
PE (UV- and moisture-resistant for outdoor use)
5.Supply Format
| Item | Specification |
|---|---|
| Core Diameter | ~7.3 – 7.7 mm (without jacket) |
| Reel Lengths | 500m / 1,000m per wooden drum |
| Packaging | PE-wrapped wooden reels or palletized coils |
| Print Marking | None – post-jacketing customization available |
| MOQ | Typically 3,000 – 5,000 meters per type |
6. Application Scenarios
Final production of RG7 coaxial cables for:
Analog CCTV systems (e.g., DVR-based surveillance)
TV and satellite signal distribution in residential buildings
RF transmission for short to mid-range commercial use
Environments:
Indoor or outdoor (when jacketed)
Areas with basic EMI exposure
7. Customization Options
Dielectric type: solid vs foamed (affects capacitance and weight)
Braid configuration: customizable pitch or wire gauge
Drain wire: optional for grounding purposes
Messenger wire: for aerial installations
Outer jacket: PVC / LSZH / PE, CPR Dca–Cca certified
Summary
| Feature | RG7 CU/48/AL |
|---|---|
| Conductor | Solid copper (CU) |
| Braid Shield | 48-wire aluminum braid |
| Shielding Level | Standard (~70–75%) |
| EMI Protection | Basic, suitable for low-EMI environments |
| Cost Positioning | Economical |
| Best Use | Indoor CCTV, MATV, residential CATV systems |
Comparison Table – RG7 CU/48/AL vs CU/64/AL vs CU/96/AL
| Feature | RG7 CU/48/AL | RG7 CU/64/AL | RG7 CU/96/AL |
|---|---|---|---|
| Inner Conductor | Solid copper (CU) | Solid copper (CU) | Solid copper (CU) |
| Braid Shield Type | 48-wire aluminum braid | 64-wire aluminum braid | 96-wire aluminum braid |
| Braid Coverage (Optical) | ~70–75% | ~80–85% | 95–98% |
| EMI Protection | Moderate | Good | Excellent |
| Attenuation Performance | Standard (higher loss) | Lower attenuation | Lowest attenuation |
| Mechanical Strength | Light-duty | Medium | Strong – more rigid |
| Flexibility | Most flexible | Moderate | Least flexible |
| Shielding Effectiveness | Basic for general environments | Suitable for moderately noisy areas | Ideal for high-EMI environments |
| Weight | Lightest | Moderate | Heaviest (due to dense braid) |
| Cost | Lowest | Medium | Highest (more aluminum used) |
Use Case Recommendations
| Application Scenario | Recommended Type |
|---|---|
| Standard indoor CCTV / low EMI environments | CU/48/AL |
| Mid-length satellite TV, CATV, or DVR systems | CU/64/AL |
| Long-distance trunk lines, headends, or EMI zones | CU/96/AL |
| Outdoor systems with additional PE jacket | CU/64/AL or CU/96/AL |
| Budget-constrained projects | CU/48/AL |
Summary
| Type | Shielding | EMI Resistance | Durability | Cost Efficiency | Ideal For |
|---|---|---|---|---|---|
| CU/48/AL | Basic | Moderate | Light | ⭐⭐⭐⭐⭐ | CCTV, short-run, budget projects |
| CU/64/AL | Good | Good | Medium | ⭐⭐⭐⭐ | General CATV, mid-range networks |
| CU/96/AL | High | Excellent | Strong | ⭐⭐⭐ | Critical links, long-run, high-EMI |
