DESCRIPTION
The ACASOM 868MHz TX-Bypass Extender is a specialized receive-path amplifier designed to enhance the sensitivity of your Helium or LoRaWAN gateway without amplifying the transmit signal. This unique device applies a selectable gain only to the incoming receive (RX) chain (default RX=12dB), while the transmit (TX) path operates in a low-loss bypass mode (≤1.3dB insertion loss). Featuring an exceptional ultra-low noise figure (≤1.2dB), it significantly improves your system's ability to hear weak distant signals, thereby maximizing Proof-of-Coverage and network reach. The unit is powered exclusively via a Bias Tee (included) and is available in two robust connector types: SMA (default) and N.
HOW TO CHOOSE THE CORRECT RX GAIN
Selecting the appropriate receive gain is critical to optimize performance and avoid receiver overload:
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For Rural / Low-Density Areas: If you have fewer neighboring miners, choose the higher RX = 12dB gain to maximize sensitivity for distant signals.
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For Urban / High-Density Areas: If you are surrounded by many miners, select the lower RX = 8dB gain to prevent overloading from strong nearby signals and improve overall stability.
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Custom Gain Needs: For other specific gain requirements within a 6-17dB range, please contact us for a custom solution.
KEY FEATURES
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Receive-Only Amplification: TX path is in bypass mode; only the sensitive RX path is amplified, preventing unnecessary TX noise amplification.
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Ultra-Low Noise Figure: ≤1.2dB NF provides exceptional signal reception clarity and sensitivity.
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Selectable RX Gain: Choose between RX = 12dB (default) or RX = 8dB to match your local signal environment.
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Dual Connector Options: Available with standard SMA or more durable N-type RF connectors.
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Bias Tee Powered: Designed for simple, integrated power delivery via the included coaxial Bias Tee.
TECHNICAL SPECIFICATIONS
| Parameter | Specification |
|---|---|
| Frequency Range | 863 - 870 MHz |
| Receive Gain (Rx) | 12dB ±1 (Default), Optional 8dB |
| TX Path Insertion Loss | ≤ 1.3 dB |
| Noise Figure | ≤ 1.2 dB |
| Operating Voltage | 5 - 24 V DC (via Bias Tee) |
| TX Switching Sensitivity | ≥ 0 dBm |
| Current Consumption | 75 mA |
| RF Connectors (Default) | Input: SMA-Female; Output: RP-SMA-Female |
| Connector Option | N-Type (available on request) |
| Operating Temperature | 0℃ ~ +60℃ |
| Dimensions | 38 x 38 x 12 mm |
| Net Weight | 0.02 kg |
INCLUDED COMPONENTS
For SMA Extender Package:
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1 x 868MHz TX-Bypass Extender (SMA)
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1 x Bias Tee
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1 x 12V 1A US Power Adapter
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2 x RG402 Blue Coaxial Cable (20CM)
For N-Type Extender Package:
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1 x 868MHz TX-Bypass Extender (N-Type)
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1 x Bias Tee
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1 x 12V 1A US Power Adapter
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2 x RG402 Blue Coaxial Cable (20CM)
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1 x N Male to SMA Female RF Adapter