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:

For Rural / Low-Density Areas: If you have fewer neighboring miners, choose the higher RX = 12dB gain to maximize sensitivity for distant signals.
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.
Custom Gain Needs: For other specific gain requirements within a 6-17dB range, please contact us for a custom solution.

KEY FEATURES

Receive-Only Amplification: TX path is in bypass mode; only the sensitive RX path is amplified, preventing unnecessary TX noise amplification.
Ultra-Low Noise Figure: ≤1.2dB NF provides exceptional signal reception clarity and sensitivity.
Selectable RX Gain: Choose between RX = 12dB (default) or RX = 8dB to match your local signal environment.
Dual Connector Options: Available with standard SMA or more durable N-type RF connectors.
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:

1 x 868MHz TX-Bypass Extender (SMA)
1 x Bias Tee
1 x 12V 1A US Power Adapter
2 x RG402 Blue Coaxial Cable (20CM)

For N-Type Extender Package:

1 x 868MHz TX-Bypass Extender (N-Type)
1 x Bias Tee
1 x 12V 1A US Power Adapter
2 x RG402 Blue Coaxial Cable (20CM)
1 x N Male to SMA Female RF Adapter

868MHz TX-Bypass Receive Extender | Ultra-Low Noise ≤1.2dB | RX Gain Selectable (12dB/8dB) | SMA/N Connector