Active antennas need a power supply for the integrated amplifier (see phantom power).
The antenna plugs in the vehicle are custom made to fit the factory radios. Aftermarket head units from Alpine to Zenec, often requires an antenna adapter.
2 vehicle antennas - 1 antenna connector on the aftermarket radios from Alpine to Zenec. The reception of the 2 vehicle antennas getting combined to just one connector.
AM - Medium wave: 526.5 kHz - 1606.5 kHz; FM - FM: 88 - 108MHz; DAB + digital radio: 174-240MHz; GPS navigation: 1,575.42 MHz (L1 band); GSM mobile phone D network: 880 - 960 MHz; GSM mobile phone e-network: 1710 - 1880 MHz; UMTS data: 1920-2,170 MHz; WLAN / Bluetooth: 2400 - 2484 MHz;
How to know if the antenna is passive (non amplified) or active (antenna has an signal amplifier)? Measure the antenna output / connector of the original factory head unit. The measurment result might be 8.5V, 12V or no voltage applied. No voltage means the vehicles is equipped with an passive antenna.
Factory head units supply the active (amplified) antenna through the coaxial wire from the radio with power. Universal aftermarket radios do not have this feature. The phantom feed must supply the amplifier of the antenna with power once the factory head unit has been replaced.
The constitution (condition) of the battery is extremely important for all CAR audio components. The scale below shows important of values of the battery in non operating state: 12,50V and above means standard battery charge (85%) - 12,65V ~ means fully charged – 12,30V ~ weakly charged (50% or half empty) - 12,10V too low for engine start - 11,90V completely discharged (risk of total discharge) 10,70V total discharge – battery is damaged.
The CAN bus (Controller Area Network) is available in many different variants. Depending on the area in which it is used, there are different transmission speeds. These are divided into drive, comfort and diagnostic purposes.
The LIN bus (Local Interconnect Network) is a cheaper 1-wire CAN bus subordinate to the CAN bus. He is responsible for the communication in the comfort functions, such as the air conditioning.
The MOST (Media Oriented Systems Transport) consists of fiber optic technology Vehicles whose sound system is integrated in the MOST data ring can be switched on and off when converting from a factory to a commercial device.
European vehicle manufacturers use data bus systems for their internal vehicle communication. The aftermarket head units from Alpine to Zenec work with analogue signals. CAN bus adapters convert the digital vehicle data into analogue signals for the radios. Gli adattatori CAN bus convertono i dati digitali del veicolo in segnali analogici per le radio.
(see also DIN / ISO standard) The height is measured on the unit chassis without sheet metal reinforcement frame.
The connector systems which connect the factory radio with the electrical system are usually standardized. The most common are ISO, Fakra / Quadlock. Please note that the mechanical dimensions are always the same. The PIN assignment is not standard. It must be checked before each assembly whether the PIN assignment on both sides are identical. Another distinguishing feature is the material thickness of the contacts. VW uses 0.6 mm while BMW, CITROEN, FORD, MERCEDES and PEUGEOT use 0.8 mm thickness in contact.
Using S-contact to trigger power on and off is the correct & appropriate use.
können in Fahrzeugen mit Multifunktionslenkrad verwendet werden. Wer von der Werksausstattung die Lenkradfernbedienung kennt möchte auf diese nicht verzichten. Lenkradadapter wandeln die Fahrzeugsignale für viele Handelsgeräte weiterhin um.
As such one refers, for example, standard 1-DIN or standard double DIN devices of the brands Alpine, Blaupunkt, Clarion, JVC, Kenwood, Pioneer, XZENT and ZENEC which are sold in free trade. All commercial devices are supplied with 12V voltage and output only analog signals. If you want to install such a device in a CAN bus controlled vehicle you need an adapter that converts the digital signals from the vehicle to analog for the radio.
DAB+ is a digital transmission standard for terrestrial reception of digital radio at a frequency range of 174 MHz ‐ 240 MHz. The automotive industry is offering more and more models with DAB+ tuners. This would justifiably suggest that DAB+ may in future be considered not only a digital standard but the only radio source in vehicles.
DAB + is the digital future in the car radio. The digital frequency range is 174 MHz to 240 MHz.
The DAB + roof antennas offer by far the best possible reception. Also available as "combi antenna" with FM and DAB + and or GPS.
In vehicle antennas whose frequency band is not reduced to the FM signal 88 - 108 MHz, all signals can be received and as needed to the various frequencies. like FM and also DAB +, are split.
The most commonly used antennas are glass antennas. (see information in the section Glass antenna)
market-dominating are 1-DIN, 2-DIN or double DIN fascia plates for aftermarket head units from Alpine to Zenec..
A 7-inch monitor fits exactly into the aperture of a professional fascia kit. This perfect fit gives the impression that this unit was originally installed by the manufacturer.
A standard fascia plate needs an additional frame to cover the gap bewteen monitor and fascia. This gives the impression that the monitor is placed into a picture frame.