Q1: What frequency range is this surge protector suitable for?

A1: It is designed for 4.4-5.2GHz band, covering applications such as 5G n79, 5GHz WiFi (some channels), C-band radar and microwave communications. It is not suitable for low frequency bands such as GNSS (1.1-1.6GHz).

Q2: What is the DC Block function? What does it do?

A2: DC Block means “Direct Current Blocking”, which means that the lightning protector is designed with an internalstraightjacket function, which serves to allow RF signals to pass through while theBlocks the passage of direct current (DC) in the signal path.This product has a built-in DC Block that prevents DC currents caused by external DC bias or ground potential difference from entering the sensitive RF circuits, avoiding device damage or performance degradation.

What this means for you:

1. Applicable systems are clearly defined: itonly applicable toThe antenna system itselfNo need for DC remote power via coaxial cableof the scenario. For example, common passive antennas, most VHF/UHF base station antennas, and so on.

2. Core protection benefits: It can be effective precisely because of the blocking of DC:

   • Isolated ground potential difference: Prevents the formation of loop currents from the DC potential difference between the grounding terminals of different equipment, thus avoiding equipment damage or signal interference.

   • Prevent accidental DC injection: To avoid DC voltage tampering into the RF port due to power failure/interference or other unforeseen circumstances that could damage the core transceiver equipment.

Important Notes::If your antenna system isactive antennaor if you need to provide a coaxial cable for a remoteTower amplifier (tower top amplifier) provides DC power supplyconjunction used express contrast with a previous sentence or clauseunavailableThis is a “DC cut-off” type of lightning protector, which would otherwise interrupt the power supply and render the equipment inoperable. In this case, you need to choose a “DC pass-through” or “bias-fed” type of lightning protector.

Q3: What is the maximum power supported?

A3: The maximum power of continuous wave (CW) is 30W, which is suitable for low and medium power RF system. If you need higher power, please consult our technical staff.

Q4: How do I properly ground myself to ensure lightning protection?

A4: The grounding wire diameter should be not less than 4mm² and the grounding resistance should be ≤4Ω. It is recommended that the protector be connected to the grounding row of the equipment cabinet or the building lightning protection grounding network to ensure a low impedance path.

Q5: Does the product support outdoor installation?

A5: This product is IP20 rated and is only suitable for indoor or waterproof cabinet installation. For outdoor use, please choose our IP67 waterproof series products.

Q6: How fast is the response time? Can it protect sensitive equipment?

A6: Response time ≤ 1ns, which can effectively suppress nanosecond transient overvoltage and protect the back-end sensitive RF devices.

Q7: Is it applicable to 5G base stations?

A7: Yes, especially for base station equipment in the 5G n79 band (4.4-5.0GHz). Please check if your base station's operating band is within this range.

Q8: Does insertion loss affect the signal much?

A9: Insertion loss ≤ 0.2dB, almost negligible, will not affect the system link budget and signal quality.

Q9: Does DC Block affect RF signal transmission?

A9: No. The DC Block isolates DC only and has minimal impact on the transmission characteristics (e.g. insertion loss, VSWR) of RF signals (4.4-5.2 GHz), which have been rigorously tested to ensure compliance.

II. Installation and grounding

Q10: What do I need to pay attention to when installing?

A10:

1. tandem access: Connect the lightning arrestor in series in the RF path between the antenna and the equipment.

2. good grounding: It must be reliably grounded using a wire with a cross-sectional area of ≥4mm² (12AWG), and the grounding resistance is recommended to be ≤4Ω.

3. waterproofing: Although the protection rating is IP20 (drip-proof), it is recommended to be installed indoors. If installed outdoors, waterproof protection is required.

Q11：Does the standard preparation configuration come with a mounting bracket?

A11: The product is not equipped with a mounting bracket, but supports hole mounting (mounting holes on the bottom of the housing) for easy fixing to a wall or rack. If a bracket is required, it can also be customized.

Q12: How long should the grounding wire be? Are there any special requirements?

A12: The grounding wire should be as short, straight and thick as possible to minimize grounding impedance. It is recommended that the length should not exceed 1 meter, use yellow-green insulated and sheathed copper core wire, and ensure that the joints are tight and free of oxidation.

Third, the performance parameters and the use of the effect

Q13: Does this lightning protector attenuate the signal?

A13: Extremely low insertion loss (≤0.1dB) is an excellent indicator, with virtually no perceptible impact on signal strength.

Q14: Voltage Standing Wave Ratio (VSWR) ≤ 1.2, is this a good value?

A14: VSWR ≤ 1.2 is a very good indicator, indicating that the lightning protector has very little impact on the system matching and hardly causes signal reflection, which is suitable for communication systems with high matching requirements.

Q15: How many lightning strikes can this lightning protector protect against?

A15: The product can withstand a nominal surge current of 10kA (8/20μs) (we simulate the lightning impact test in the laboratory: 10 times each for positive and negative polarity, each time at an interval of 60s) and a maximum surge current of 20kA (simulated lightning impact test in the laboratory: 1 time each for positive and negative polarity, each time at an interval of 60s) without damage, and the performance indicators are normal. The actual service life is related to the intensity and number of lightning strikes, it is recommended to check the system performance after a strong lightning strike and replace it if necessary.

IV. Troubleshooting and maintenance

Q16：What may be the reason that the device does not work properly after installation?

A16: Please follow the steps below to troubleshoot:

1. Check that the RF connection is tight and the connector interface is correct (SMA type).

2. Verify that the device frequency is within the range of 4.4∼5.2 GHz.

3. If the device relies on DC power (e.g., some active antennas), check whether the power supply has been interrupted by the “DC blocking” function.

4. Temporarily remove the lightning protector and connect the antenna directly to the equipment to determine if the lightning protector is faulty.

Q17: Do lightning protectors need to be replaced periodically?

A17: The lightning protector can work stably for a long period of time when there is no lightning strike or surge event. It is recommended to check the grounding connection and appearance once a year to make sure it is in good condition. If the area where it is located has frequent thunderstorms or has been subjected to strong lightning strikes, it is recommended that it be inspected or replaced periodically.

V. After-sales support

Q18: Is there a warranty? How do I contact technical support?

A18: The product comes with a limited warranty (three years free of charge, please refer to the purchase contract or label for the exact period). If you have technical problems or need after-sales support, please contact:
telephones: (+86)0755-82591856
node::www.omrdon.com
address8/F, Building 6, Intelligent Manufacturing Industrial Park, Shenzhen Pingshan Hi-Tech Zone, No. 2 Wo Tian Road, Kengzi Street, Pingshan District, Shenzhen, China

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