Product Description
Mini-Circuits CBL-15FT-SMSM+ – 15-Foot RG58 Coaxial Cable, SMA Male to SMA Male, 50Ω
A professional-grade 15-foot coaxial cable assembly from Mini-Circuits, featuring SMA male connectors on both ends. Designed for RF and microwave test setups, this RG58-style cable delivers reliable signal transmission from DC to 3 GHz with 50Ω impedance. Ideal for connecting signal generators, spectrum analyzers, oscilloscopes, and RF components in laboratory, production, and field environments.
🔍 Key Specifications:
📡 Electrical:
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Manufacturer: Mini-Circuits
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Part Number: CBL-15FT-SMSM+
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Connector Type: SMA Male to SMA Male
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Impedance: 50Ω
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Frequency Range: DC to 3 GHz
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Cable Type: RG58 (or equivalent flexible coaxial)
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Shielding: Braided copper – good flexibility, moderate shielding
📏 Physical:
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Length: 15 feet (4.57 meters) – generous reach for benchtop setups
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Diameter: ~5mm (typical RG58)
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Jacket Material: Black PVC – durable, flexible
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Connector Finish: Gold-plated center pin, nickel-plated body – corrosion-resistant
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Connector Construction: Crimp/solder type – robust, reliable
🌡️ Environmental:
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Operating Temperature: -40°C to +85°C
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Bend Radius: ~25mm (minimum, repeated flexure)
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RoHS Compliant: Yes
✅ Condition:
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Condition: NEW
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Visual: Cable jacket clean, no cuts or kinks. Connectors intact, threads smooth, center pins straight.
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Includes: (1) Mini-Circuits CBL-15FT-SMSM+ cable assembly
⚙️ Why This Cable is Essential:
🔬 Laboratory-Grade Construction:
Mini-Circuits is a trusted name in RF components and test accessories. Their cables are built to withstand repeated laboratory use:
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Precision-crimped connectors – consistent impedance, low VSWR
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Flexible yet durable – RG58 formulation optimized for test environments
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Gold-plated center pins – low contact resistance, no oxidation
📏 15-Foot Length – Maximum Flexibility:
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Connect across the lab – from benchtop to benchtop
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Reach tall racks – connect floor-standing instruments
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Flexible positioning – no need to move equipment for connections
🎯 SMA – The RF/Microwave Standard:
SMA connectors are the most common interface for:
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Signal generators (up to 3 GHz and beyond)
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Spectrum analyzers – RF input
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Network analyzers – test ports
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RF amplifiers, filters, attenuators – module connections
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Oscilloscopes (with SMA-to-BNC adapters)
🛠️ Applications & Uses:
🔬 Test & Measurement:
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Signal generator to DUT – clean signal delivery
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Spectrum analyzer input – measure device output
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Network analyzer test ports – S-parameter measurements
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Oscilloscope triggering – external trigger signals
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Power meter sensors – RF power measurement
📡 RF/Microwave Systems:
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Antenna connections – temporary test antennas
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Amplifier input/output – cascade RF components
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Filter testing – insertion loss, return loss measurements
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Attenuator connections – signal level control
🖥️ Lab Infrastructure:
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Reference frequency distribution – 10 MHz references
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Trigger/sync distribution – multi-instrument synchronization
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Test fixture cabling – connect DUT to instruments
🔧 Field Service & Maintenance:
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Portable test setups – flexible, durable enough for field use
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Temporary installations – quick deployment
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Spare/test cables – keep in inventory for unexpected needs
📊 Typical Performance (RG58):
| Parameter | Value | Notes |
|---|---|---|
| Impedance | 50Ω ± 2Ω | Characteristic impedance |
| Capacitance | ~101 pF/m | Typical RG58 |
| Attenuation @ 1 GHz | ~0.7 dB/m | Approximate – varies with frequency |
| Max Frequency | 3 GHz | Mini-Circuits rating |
| VSWR | <1.3:1 typical | Well-matched assembly |
| Velocity Factor | 0.66 | Signal speed ~66% of c |



