Product Details of Hardline Seamless 625 Trunk Cable
The Hardline Seamless 625 Trunk Cable represents the upper echelon of coaxial cable technology, designed for the most demanding, high-capacity backbone applications. The designation "625" is the critical identifier, signifying a larger and more powerful cable than the 500 or 565 versions.
Features
1.0.625-Inch Diameter: The substantial physical size is the defining characteristic. The increased diameter allows for a significantly larger center conductor and a greater volume of physical foamed polyethylene. This physical scaling directly and dramatically reduces signal loss (attenuation) more than any smaller cable can achieve.
2.Seamless Tubular Outer Conductor:The outer conductor is a perfectly smooth, seam-free tube, typically made of aluminum.Provides an impeccable electromagnetic shield. It eliminates all signal leakage (egress) and prevents ingress of outside interference, offering 100% shielding effectiveness.
3.Center Conductor:Material is solid copper clad aluminum which is used for the lowest possible electrical resistance and minimal signal loss.
3. Dielectric: Physically foamed polyethylene
4.Outer Jacket: Black PE (Polyethylene) .This jacket provides robust protection against UV radiation,moisture, abrasion, and other environmental hazards for aerial or direct burial installations.
Advantages
1.The Lower Signal Loss (Attenuation) :
This is the paramount advantage. The 0.625 inch size offers the lowest attenuation per unit length available in a standard hardline product line. This translates to:
a.Dramatically Longer Amplifier Spans: Signals can travel for miles with minimal degradation, drastically reducing the number of amplifiers needed in a long-haul system.
b.Superior Signal Integrity: Preserves signal quality and data integrity over extreme distances, which is critical for modern high-bandwidth applications.
c.Operational Cost Savings: Fewer amplifiers mean lower energy costs, reduced maintenance, and higher overall system reliability.
2. Unrivaled Shielding and Interference Immunity:
The seamless tubular outer conductor creates a perfect Faraday cage. Making the cable complete immunity to external RFI/EMI and preventing any signal from leaking out. This is essential for systems operating in congested RF spectra and for ensuring compliance with strict regulatory standards.
3. Exceptional Phase Stability:
The rigid mechanical structure ensures that the electrical characteristics remain constant despite temperature variations. This is non-negotiable for phased-array antenna systems (like those for 5G) where precise signal timing between multiple cables is required for beamforming
4.Future-Proofing and Bandwidth Headroom:
Installing Hardline Seamless 625 Trunk cable provides significant performance headroom for future network upgrades. It can easily handle increased bandwidth demands, higher frequency bands (e.g., for 5G Wave), and more powerful transmission equipment without requiring replacement of the physical infrastructure.
Same series of products
Specification of Hardline Seamless 565 Trunk Cable
Hardline Seamless 565 Trunk Cable
Material Specification:
| Items | Material | Diameter (mm) |
| Inner Conductorl | Copper Clad Aluminuml |
3.48±0.05 |
| Dielectricl | Physical Foam polyethylenel |
14.40±0.10 |
| Outer Conductorl | Overlapping Copper Foill |
15.88±0.10 |
| Jacketl | Black PEl |
17.40±0.25 |
Electrical Performance:
| Impedance | 75±2Ω | |
| Capacitance | 50.20 PF/m | |
| Velocity | 87% | |
| DC Resistance Max@20℃ |
Inner Conductor Outer Conductor |
2.95Ω/km 0.82Ω/km 3.77Ω/km |
| SRL Min / VSWR Max | 5-1002 MHz | 30dB / 1.06 |
| SRL Min / VSWR Max | 1002-1218 MHz | 24dB / 1.13 |
| SRL Min / VSWR Max | 1218-1794 MHz | 20dB / 1.22 |
| SRL Min / VSWR Max | 1794-2250 MHz | 20dB / 1.22 |
| SRL Min / VSWR Max | 1218-1794 MHz | 20dB / 1.22 |
Mechanical Specification:
| Jacket Tensile | ≥10.3MPa |
| Jacket Elongation | ≥400% |
| Min.Bending Radius |
114.30mm |
Environmental Specification:
| Installation Temperature | -40℃~+60℃(PE) |
| Operating Temperature | -55℃~+85℃(PE) |
Attenuation at 20℃ cable temperature:
| Frequency (MHz) | Attenuation Typical (dB/100m) |
| 5 | 0.43 |
| 55 | 1.51 |
| 211 | 3.02 |
| 250 | 3.28 |
| 270 | 3.41 |
| 300 | 3.54 |
| 330 | 3.8 |
| 350 | 3.9 |
| 400 | 4.2 |
| 450 | 4.43 |
| 500 | 4.69 |
| 550 | 4.95 |
| 600 | 5.18 |
| 750 | 5.87 |
| 870 | 6.4 |
| 1002 | 6.92 |
| 1218 | 7.62 |
| 1500 | 8.74 |
| 1794 | 9.7 |
| 1800 | 9.72 |
| 2000 | 10.34 |
| 2200 | 10.95 |
| 2500 | 11.81 |
| 2700 | 12.37 |
| 3000 | 13.19 |
*The attenuation is typical value, Maximum value shall be 105% of the nominal attenuation value.
Question: What is a Hardline Seamless Trunk 625 Cable?
Answer:
This is a premium, rigid coaxial cable designed for the core backbone ("trunk") of large-scale signal
distribution systems.
1. Hardline: Indicates it is a rigid, non-flexible cable with a smooth, tubular outer conductor, as opposed
to a flexible cable with a braided shield.
2. Seamless: This is a critical feature. It means the outer conductor is formed from a seamless copper or
aluminum tube.
3.Trunk: Denotes its use in the main arterial network of a system.
4. 565: This is the most important specification. It refers to the 0.625 inch (approx. 15.88 mm) outer diameter. This larger size is the primary driver behind its superior performance.
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