LNB AB-COM Mascom Monoblock MC M4-QS03 Quad 4.3 - quad output LNB for 4.3° dish spacing

AB-COM Mascom Monoblock MC M4-QS03 Quad 4.3 is a quad-output LNB designed to receive signals from two satellites spaced 4.3° apart (for example Astra 19°E and Astra 3A). The device integrates two LNB heads in a single monoblock housing with a built-in DiSEqC switch, offering four independent outputs for connecting up to four receivers or a multiswitch. The LNB is fullband with a low noise figure of 0.3 dB and provides stable frequency conversion suitable for DVB-S and DVB-S2 reception.

Advantages

The monoblock LNB combines two satellite feeds in one compact unit with an integrated DiSEqC switch, simplifying installation on dishes with 4.3° feed spacing. Four independent outputs allow simultaneous use by up to four tuners without additional external switching. Fullband coverage and a low noise figure (0.3 dB) support reliable reception and good signal quality for standard and high-definition satellite broadcasts.

Suitable for

• Receiving Astra 19°E and Astra 3A (4.3° separation) on a compatible monoblock dish
• Homes with up to four independent satellite receivers or set-top boxes
• Small installations where an integrated DiSEqC solution is preferred
• Connecting to a multiswitch that accepts four LNB inputs

Key specifications

• Model: Mascom Monoblock MC M4-QS03 Quad 4.3
• Brand: AB-COM
• MPN: MASCOM QUAD 4,3
• EAN: 8594016905036
• Outputs: 4 independent F-connector outputs (quad)
• Satellite separation: 4.3° (monoblock for two satellites)
• DiSEqC: built-in DiSEqC switch for two positions
• Bandwidth: Fullband
• Noise figure: 0.3 dB
• Compatible with: DVB-S, DVB-S2

How to use

Mount the monoblock LNB on a satellite dish designed for 4.3° monoblock spacing, aligning the feed according to the dish manufacturer’s instructions. Connect coaxial cables from the four F-type outputs to receivers or to a compatible multiswitch. Configure each receiver to the appropriate satellite position using DiSEqC commands (or receiver satellite setup), selecting the correct orbital position for Astra 19°E and Astra 3A. Fine-tune dish alignment while monitoring signal strength and quality on a receiver.

Usage recommendations

Use coaxial cables and connectors in good condition, keep cable lengths reasonable to minimise signal loss, and protect outdoor connections from moisture. If connecting to a multiswitch, ensure the multiswitch supports four LNB inputs and that receiver DiSEqC settings match the physical wiring. For best results, mount on a dish sized and positioned for the two-satellite monoblock configuration and perform careful alignment for optimal reception.