Professional FM or DAB Antenna Amplifier

ATTB 4723.01 Professional DAB and FM Aerial Amplifier
Part No.: 4723.01

Description:

The ATTB 4723.01 is a broadband radio amplifier that boosts the FM and DAB / DAB+ signal from passive aerials, improving reception where the signal is weak. It is suitable for use inside vehicles or buildings. It is developed and manufactured in Germany by Antennentechnik Bad Blankenburg (ATTB) from high quality components, and undergoes strict testing processes. With its own research, development and production, ATTB has stood for quality and reliability "Made in Germany" since 1919.

Key Features:

• Boosts FM and DAB / DAB+: Amplifies the FM (76 - 108 MHz) and DAB / DAB+ (174 - 240 MHz) bands, with low noise (3.5dB or less on FM, 2.0dB or less on DAB / DAB+).
• Suits All Passive Aerials: Designed to improve the reception of passive broadcast aerials.
• AM Passes Through: AM signals pass through the amplifier.
• Flexible Power: Can be powered from the radio's aerial phantom power, or from a +12V supply using the red lead.
• Easy to Mount: Fixes in place with the supplied adhesive pad, with minimal installation effort.
• Compact: A slim metal case only 11mm thick and weighing 63g.
• Made in Germany: Designed and manufactured by ATTB.

How It Works:

• The aerial plugs into the IN connector, and the radio plugs into the FM/DAB connector.
• The amplifier boosts the signal from the aerial before it travels along the cable to the radio.
• It needs a +12V supply (40mA). This comes from the radio's aerial phantom power through the FM/DAB connector, or from the red lead if the radio does not supply phantom power.

Typical Uses:

• Improving FM and DAB+ reception with a passive aerial, for example in areas where the signal is weak.
• Aftermarket DAB+ installations where a passive DAB aerial is used with a long cable run.
• Vehicle installations, including caravans and motorhomes, where the aerial signal needs a boost.
• Indoor installations inside a building.

Specifications:

• Analogue broadcasting, FM (76 - 108 MHz) is amplified, AM pass-through
• Digital broadcasting sector, DAB/DAB+ (174 - 240 MHz) is amplified
• Connectors: FAKRA(m) Z (two male connectors) - adaptors are optionally available
• Impedance: 50 Ohm
• Matching (VSWR): 1.5:1 or better
• Gain:
  • FM: 13dB
  • DAB / DAB+: 15dB
• Noise figure:
  • FM: ≤3.5dB
  • DAB / DAB+: ≤2.0dB
• Power supply: 12V DC, 40mA (radio aerial phantom power, or the red lead)
• Mounting using an adhesive pad (supplied)
• For indoor use only
• Weight: 0.063 kg

Connections:

• IN: FAKRA male (Z code). Connect to the aerial.
• FM/DAB: FAKRA male (Z code). Connect to the radio. This connector also carries the radio's phantom power.
• Power lead: Red lead with a 6.3mm flat receptacle, for a +12V / 40mA supply when the radio does not supply phantom power.

Dimensions:

• Width: 50 mm x Height: 11 mm x Length: 67 mm (approx. without cables or connectors)
• Power lead: approx. 735mm long, with a 6.3mm flat receptacle

Check Before Ordering:

• This amplifier is for passive aerials only. Do not use it with an aerial that already has an amplifier, because double amplification can overload the radio.
• Both connectors on the amplifier are FAKRA male (Z code), so your aerial lead and radio lead need FAKRA female connectors, or the correct adaptors.
• Check whether your radio supplies phantom power to its aerial socket. If it does not, the amplifier needs the red lead connected to a +12V supply.
• DAB+ digital radio is not available in all areas of Australia. Please check coverage in your area before ordering, using our Digital Radio DAB information page.
• This amplifier boosts FM and DAB / DAB+ only. AM signals pass through without being amplified. It also does not add DAB+ reception to a radio that does not have a DAB+ tuner.
• If you are unsure, please contact us to confirm before ordering.

Installation Guide:

• 1. Choose a Position: Mount the amplifier inside the vehicle or building, ideally close to the aerial, so the signal is boosted before the cable loses any of it. If the aerial lead is short, mounting near the radio is fine. Keep it away from heat and moisture, and within reach of a +12V source if you are using the red lead (about 735mm long).
• 2. Fix It in Place: Clean the surface and fix the amplifier with the supplied adhesive pad.
• 3. Connect the Aerial: Plug the aerial lead into the IN connector.
• 4. Connect the Radio: Plug the radio lead into the FM/DAB connector.
• 5. Power: If your radio supplies phantom power to its aerial socket, the amplifier is powered through the FM/DAB connector, and the red lead is not needed. Insulate its end so it cannot short. If your radio does not supply phantom power, connect the red lead to a switched +12V supply, such as the radio's antenna / remote output or an ignition-switched source.
• 6. Test: Switch on the radio and check reception on FM and DAB before refitting any trim.

Things to Look Out For:

• If you rely on phantom power, make sure your radio's aerial power setting is switched on.
• Do not connect the red lead to a constant +12V supply, or the amplifier will keep running when the vehicle is off.
• An amplifier boosts whatever the aerial picks up, including noise. A poorly positioned aerial or a damaged cable will not be fixed by an amplifier.
• Keep the cables away from power wiring and electronics, which can cause interference.
• Do not bend or kink the cables sharply, and make sure the FAKRA connectors click fully into place.
• Keep it away from heat sources, and do not mount it where it can get wet.
• Do not mount it, or run cables, in airbag zones.

Supplied:

• 1 x ATTB 4723.01 amplifier, with power lead
• 1 x adhesive pad

Please note the aerial, radio lead and any adaptors are not included.