Blogs (57)
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Sterilization Compatibility of Micro Coaxial Cables: EtO, Autoclave, Gamma, and Hydrogen Peroxide
Opening the autoclave door after a 134°C steam cycle, pulling out a cable assembly, and watching the TPU jacket peel away from the shield like wet tissue paper. We've seen this exact failure on cables sent to us by OEMs who didn't check sterilization compatibility…
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IEC 60601 Cable Assembly Requirements: What Medical OEMs Must Know About Electrical Safety
Does your cable assembly need to be "IEC 60601 certified"? No—because there's no such thing as IEC 60601 certification for a cable assembly. IEC 60601 cable assembly compliance is one of the most misunderstood topics in medical device engineering. The standard applies to the complete…
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Understanding Coaxial Cable Capacitance: Why pF/m Matters for High-Frequency Medical Imaging
83 pF/m versus 58 pF/m. Two cables, same AWG, same impedance, same shield coverage—but the second one uses ePTFE dielectric instead of solid PTFE, and that 25 pF/m difference changes how the ultrasound image looks on a 15 MHz linear probe. Coaxial cable capacitance is…
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Flex Life Testing for Micro Coaxial Cables: How Many Cycles Does Your Application Need?
A medical device company asked us to qualify a cable for "high flex life." We asked how many cycles. "A lot," they said. That's not a specification—it's a wish. Flex life testing for micro coaxial cables requires specific, measurable parameters: cycle count, bend radius, bend…
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Micro Coaxial Cable Shielding Effectiveness: Braid vs Foil vs Spiral Wrap Compared
Which shield type actually gives the best EMI protection on a micro coaxial cable—and does it matter as much as the coverage percentage number on the datasheet suggests? We've measured shielding effectiveness on hundreds of cable samples across all three shield types, and the answer…
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Capsule Endoscopy Cable: Ultra-Fine 46-50 AWG Micro Coaxial for Wireless Capsule Cameras
A capsule endoscope is wireless—so why does it need cable? That's the question we get from engineers encountering capsule endoscopy for the first time. The answer reveals an interesting corner of micro coaxial cable engineering where "ultra-fine" takes on a meaning that makes 42 AWG…
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da Vinci Surgical Robot Cable Replacement: Aftermarket Micro Coaxial Solutions for Robotic Systems
Instrument cable replacement is the single largest recurring maintenance cost for da Vinci surgical system operators, after the instruments themselves. Each da Vinci instrument arm contains micro coaxial cables that carry vision, sensor, and control signals through the articulating wrist—and those cables wear out. The…
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Minimally Invasive Surgery Cable Engineering: Torsional Flex, Biocompatibility, and Miniaturization
±720°, 50,000 times. That's the torsional flex specification on a cable for a laparoscopic instrument we shipped last quarter—two full rotations in each direction, repeated 50,000 cycles, with zero channel dropout and less than 0.5Ω impedance shift on any channel. Standard bending flex testing doesn't…
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Ablation Catheter Cable Assembly: Materials, Design, and Biocompatibility Requirements
A cardiac device company came to us three years ago with a problem that had stalled their ablation catheter development for six months. Their prototype cable assembly worked perfectly during bench testing—clean mapping signals, stable ablation power delivery, good torque transmission. Then they started animal…
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EP Mapping Catheter Cable Design: Micro Coaxial Solutions for Electrophysiology
Soldering a 46 AWG micro coaxial element to a 0.3mm electrode pad on an EP mapping catheter tip—that's a 90-second operation under 40× magnification with a soldering iron tip ground down to 0.2mm. The solder window is about 280-310°C, and you've got maybe 0.15mm of…
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Aerospace NDT Cable Requirements: Meeting AS9100 and NADCAP Standards for Ultrasonic Inspection
What happens when a NADCAP auditor picks up your NDT coaxial cable and asks for its calibration record? If the answer is a blank stare, you've got a finding. Aerospace NDT cable isn't just a wire connecting the instrument to the probe—it's a controlled inspection…
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Pipeline Inspection Coaxial Cable: High-Temperature, Corrosion-Resistant Solutions for Oil & Gas NDT
A pipeline inspection crew in West Texas called us after losing two cables in one shift. They were doing corrosion mapping on a 24-inch crude oil line operating at 65°C surface temperature—not especially hot by oil and gas standards. The cables were standard RG-174/U with…
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TOFD vs Pulse-Echo vs Phased Array: Choosing the Right Coaxial Cable for Each NDT Method
4.2 dB. That's the signal-to-noise improvement we measured when an NDT inspector switched from a generic 75Ω video cable to a proper 50Ω TOFD cable on his corrosion mapping setup. He'd been using the video cable for two years—it "worked fine" for pulse-echo inspections because…
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Phased Array Ultrasonic Testing (PAUT) Cable Requirements: A Complete Engineering Guide
Most NDT technicians treat the phased array ultrasonic testing cable as a generic accessory—plug it in, run the inspection, coil it up. That's understandable when a single-element NDT cable is basically a BNC-to-BNC coaxial jumper. But a PAUT cable is a multi-channel coaxial bundle with…
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How to Specify a Custom Ultrasound Probe Cable Assembly: The Complete OEM Checklist
About one in three custom ultrasound cable assembly RFQs we receive at FRS Technology is missing at least one critical specification. Not obscure details—fundamental parameters like test frequency for impedance, or whether the phase matching tolerance applies to the cable assembly or just the raw…