LMR240 VS LMR400[Video]: Which one is better?

Times Microwave's LMR®-400 is designed for adaptability, low loss, RF shielding, and wearability. The LMR-400 has the narrowest bend radius of any cable of comparable size and performance due to its cable architecture. The cable has the lowest loss of any comparable cable. This cable offers 90 dB of RF shielding and is ideal for EMI-prone environments. The LMR-400 is suitable for both indoor and outdoor use. Use Times Microwave's LMR-400 cable for any application that necessitates a low-loss, conveniently routed RF cable (e.g. WLL, GPS, LMR, WLAN, WISP, WiMax, SCADA, Mobile Antennas). The LMR-400 cable can be used in place of an RG-8 cable.

Pasternack's LMR-240 part number refers to a flexible LMR-240 coax cable. The 50 Ohm Pasternack LMR-240 flexible coax cable has a PE (F) dielectric. Our LMR-240 coax has a PE jacket with a thickness of 0.24. This Pasternack cable features a shield count of two, RF shielding of 90 dB, and a maximum frequency of 5.8 GHz. At 1 GHz, the attenuation of the LMR-240 coax cable is 8 dB.

Over 40,000 RF, microwave, and millimeter-wave components are made up of Pasternack LMR-240 coax cables. LMR-240 cables and other RF components are available for same-day shipping anywhere in the world. Custom RF cable assemblies made from LMR-240 or other types of coax can also be constructed and dispatched on the same day.

LMR400 Features

• Priced Per Foot

• Cable Type: LMR-400

• Impedance: 50 ohm

• Center Conductor: Bare Copper Covered Aluminum (BCCAI)

• Jacket: Polyethylene (PE)

• Outer Diameter: .405 inch

• Indoor/Outdoor Rated

• Drop-in replacement for RG-8

• Attenuation @ 900 MHz/100 ft: 3.9dB/100ft

• Attenuation @ 2.4 GHz/100 ft: 6.65dB/100ft

• Any application (e.g. WLL, GPS, LMR, WLAN, WISP, WiMax, SCADA, Mobile Antennas) requiring an easily routed, low loss RF cable

• Max Continuous Length: 1000 FT

LMR240 Features

• Priced Per Foot

• Cable Type: LMR-240

• Impedance: 50 ohm

• Center Conductor: Bare Copper (BC)

• Jacket: Polyethylene (PE)

• Outer Diameter: .240 inch

• Indoor/Outdoor Rated

• Drop-in replacement for RG-8X

• Attenuation @ 900 MHz/100 ft: 7.6dB/100ft

• Attenuation @ 2.4 GHz/100 ft: 12.1dB/100ft

• Any application (e.g. WLL, GPS, LMR, WLAN, WISP, WiMax, SCADA, Mobile Antennas) requiring an easily routed, low loss RF cable

• Max Continuous Length: 1000 FT

LMR400 Attenuation vs Frequency

LMR240 Attenuation vs Frequency

LMR®240 is also a 50 Ohm impedance outdoor rated flexible low loss communications cable. It's developed for short feeder runs in applications like GPS, WLAN, and mobile antennas. The flexible communications coax LMR®400 has a 50 Ohm impedance.

LMR400 cable has a lower loss than LMR240 cable, but it is thicker and less flexible, making it more difficult to work with. It is available in lengths ranging from 2' to 100' and is intended for use with antennas and amplifiers that do not include wiring. Although LMR240 is half the size and has twice the attenuation loss of LMR400, the difference does not appear to be significant, and both appear to be the highest quality and lowest loss alternatives for marine coax. The DB (waterproof) version is also available. I'm leaning toward the LMR240 because of its smaller diameter, and I'd use a messenger line to run the wire up.

• LMR400 Datasheet

• LMR240 Datasheet

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Times Microwave Systems is a pioneer in the development and manufacture of coaxial transmission lines. For military, aerospace, wireless communications, and industrial applications, they offer a wide range of RF and microwave transmission line solutions. In the industry, its engineering competence and range of manufacturing capabilities are well acknowledged. They can serve both specialist applications with extremely demanding performance requirements and high volume commercial applications at frequencies ranging from a few kHz to 110 GHz, thanks to production sites in the United States and China. Since 2009, Times Microwave Systems has had access to the resources of Amphenol, one of the world's largest makers of interconnect components. Amphenol Corporation is a manufacturer of electrical, electronic, and fiber-optic connectors, as well as connection systems and coaxial and specialized cable.

Note: LMR® is a registered trademark of Times Microwave Systems.