LMR400 and LMR195 are both types of coaxial cables, commonly used for transmitting radio frequency (RF) signals.

The main differences between LMR400 and LMR195 lie in their physical characteristics, such as size, attenuation, and power handling capabilities.

  1. Cable Size:

    • LMR400 is a thicker and heavier cable compared to LMR195. The diameter of the cable is larger for LMR400, making it more robust and capable of handling higher power levels.
  2. Attenuation:

    • LMR400 generally has lower attenuation compared to LMR195. Attenuation refers to the loss of signal strength as it travels through the cable. Lower attenuation is desirable for longer cable runs or higher frequency applications, as it allows the signal to travel over greater distances with less loss.
  3. Power Handling:

    • LMR400 is designed to handle higher power levels than LMR195. This makes LMR400 suitable for applications where higher power transmission is required, such as in long-distance RF communication or high-power radio systems.
  4. Frequency Range:

    • LMR400 typically has a broader frequency range compared to LMR195. This makes LMR400 suitable for a wider range of RF applications, including those involving higher frequencies.
  5. Applications:

    • LMR400 is often used in applications where lower loss and higher power handling are crucial, such as in long-distance communication links, cellular base stations, and high-frequency RF systems.
    • LMR195 is suitable for applications with shorter cable runs or lower power requirements, such as in WiFi connections, short-range RF devices, or applications where flexibility and a smaller cable size are important.

In summary, the choice between LMR400 and LMR195 depends on the specific requirements of the RF application, including factors such as distance, frequency, power levels, and the need for flexibility. LMR400 is generally chosen for applications requiring higher performance and power handling, while LMR195 may be sufficient for less demanding scenarios.

Identifying the type of connector on a coaxial cable can be done by examining its physical characteristics. Here are some steps to help you identify the connector:

  1. Examine the Connector:

    • Look at the connector at the end of the coaxial cable. Pay attention to the shape, size, and the number of pins or prongs. For example, N-Male connectors are big, N-Female connectors have the threads on the outside with a hollow center pin.  
  2. Check for Labeling:

    • Some connectors have labels or markings on them that indicate the type. Look for any stamped or printed information on the connector itself.
  3. Measure the Diameter:

    • Measure the diameter of the connector. Different connectors have different dimensions. You can use a caliper or ruler to measure the diameter accurately.
  4. Count the Pins:

    • Count the number of pins or prongs on the connector. This can help narrow down the possibilities, as different connectors have different pin configurations.
  5. Compare to Common Connector Types:

    • Familiarize yourself with common coaxial connector types. Some examples include BNC, N-Type, SMA, F-Type, and others. You can find visual references online or in connector identification guides.
  6. Use Online Resources:

    • There are online resources and images that provide visual comparisons of various coaxial connectors. You can use these resources to match the appearance of your connector.
  7. Ask the Manufacturer or Seller:

    • If you have access to information about where the cable was purchased or its manufacturer, you can contact them for assistance. They may have documentation or support resources that can help you identify the connector.
  8. Consult a Professional:

    • If you’re still unsure, send us an email, or contact us directly at (877) 209-5152.  We are here to help.  We stock a plentiful assortment of the most popular RF Connectors, and custom manufacturer any type of coaxial cable.

Remember that coaxial connectors come in various shapes and sizes, and identifying them accurately may require a combination of these methods. Additionally, some connectors may look similar, so be as detailed as possible when comparing and measuring the connector to ensure an accurate identification.

RP-SMA (Reverse Polarity SMA) and SMA (SubMiniature version A) are two types of coaxial connectors commonly used in RF (radio frequency) applications. The main difference between them is the gender and threading of the connector.

  1. SMA (SubMiniature version A):

    • SMA connectors come in male and female versions. The male SMA connector has a center pin surrounded by threads, while the female SMA connector has a socket with an internal thread. The male connector has threads on the outside.
  2. RP-SMA (Reverse Polarity SMA):

    • RP-SMA connectors were developed to prevent connection of standard SMA connectors to equipment with RP-SMA jacks and vice versa. In RP-SMA, the roles are reversed. The male RP-SMA connector has a socket with internal threads, while the female RP-SMA connector has a pin surrounded by external threads. This reverse polarity is intended to prevent accidental connections between standard SMA and RP-SMA connectors.

In summary, the primary difference lies in the threading and gender of the connectors:

  • SMA:

    • Male has threads on the outside.
    • Female has an internal socket with threads.
  • RP-SMA:

    • Male has an internal socket with threads.
    • Female has threads on the outside.

When purchasing or using RF connectors, it’s crucial to be aware of whether the equipment uses standard SMA or RP-SMA connectors to ensure compatibility. Mixing these connectors could result in damage and poor signal transmission. Always check the specifications of your devices and cables to ensure the correct type of connector is being used.

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