Vehicle interferences on the motorbike

When the engine is running (dependent on motor speed) respectively when the source of the interference is on, usually dependent on motor speed singing. Interferences are gone when the respective electronic device such as radio, motorbike intercom, etc. is supplied via a separate 12V net (power supply or battery), (ground remains connected).

If several electronic devices are in operation, determine which device responds to the board power interferences and install a suitable board power interference suppression choke into the 12V lead (s).

For up to 1 Ampere our Power-Stabilizer (For PowerCom: Order No. 73092 or Universal: Order No. 73104) can be used, which suppresses both board power- and ground loop interferences.

Only when the engine is running, only in the case of various interconnected electronic systems. Interferences are gone when all devices are separated from each other, that is, in motorbike intercom systems, if the control unit is separated from all additional devices, such as radio, two-way radio, etc. Interferences already occur when only the ground (connector sleeve) of the interfering branch of the power supply has a connection.
In the case of the PowerCom system stronger, if the housing has connection to vehicle ground.
(There is also a variant in which the interferences are only to be heard at the two-way radio remote station, that is are modulated upon transmission *)

For supply up to 1 Ampere our Power-Stabilizer (For PowerCom: Order No. 73092 or Universal: Order No. 73104) can be used, which suppresses both board power- and ground loop interferences.

At the two-way radio connection, if the interference is not too strong, the power supply and the loudspeaker connection of the two-way radio can also be routed via a 2-pole switch and thus switched on and off together. The interference is then only present when the two-way radio is switched on.
If possible, only one ground connection for all devices including antenna(s).

When using a PowerCom system, make sure that the housing (!) Is not connected to the vehicle ground.

*(Use two-way radio adaptor with integrated transformer, two jack-plugs or GDCH Order No. 33338)

When the engine is running (dependent on motor speed) or when the source of the interference is on (usually not dependent on motor speed), interferences may become stronger or weaker when the position of cables, radio, control unit, etc. is changed.

Determine source of interference and remove interference, otherwise , if possible, change the position of cables, radio, control unit, etc. so that the interference no longer occurs.

Using a PowerCom system, there the interference, as far as known until now, doesn't occur.

Broadband noise on a connected two-way radio, e.g. CB radio. Covers all receive channels with a significant RF signal. Only when source of interference is turned on respectively engine is running, sound of the interference is usually not dependent on motor speed. Interference occurs e.g. on K1200LT already, if the ignition is switched on, but the engine is not yet running!

Determine source of interference and remove interference close the squelch on the two-way radio to the extent that the interference is suppressed, but this reduces the range. Use FM radio to improve speech intelligibility. Use a channel between 35 and 40; the noise level may be slightly lower on these channels. If the strength of the interferences differs, additionally the use of the AKE FM-Select is recommended.

Connected audio / navigation system with board power supply. Only when engine is running (dependent on motor speed), the interference only occurs when the audio / navigation system is connected and turned off.

Using a PowerCom system, if you follow the installation instructions and use the correct connection cable, the interference, as far as known until now, doesn't occur. Our Power-Stabilizer (For PowerCom: Order No. 73092 or Universal: Order No. 73104) can also be used for improvement.

Only in the case of two-way radio or mobile phone transmission, noises can be heard by the conversation partner only when the engine is running (vibrations) or when the connected device is being knocked on.

Mount two-way radio or mobile phone vibration-free and elastic. Frequent cause is fluctuating contact resistance in the microphone connector (especially with somewhat unclean grounding contact).

Especially navigation systems often produce an interference which can be heard as an unpleasant sound. In systems with priority control, the control electronics may get confused by this interference (e.g., audio source gets unexpectedly quiet). Typically, this interference is immediately gone when the connection cable to the intercom system is disconnected.

Use the connection cable for devices with high-level output and set the volume on the navigation system to maximum. Otherwise the following is applicable: Only connect devices which do not cause such interferences.

Only for two-way radio or mobile phone transmission, whistles or other noises, can even be heard by the conversation partner when the engine is off.

If possible change the position of two-way radio or mobile phone antenna, so that the interference no longer occurs. Radio antennas with a higher transmission power should be mounted as far away as possible from the device electronics, possibly using a separate mounted antenna. Pay attention to the technically correct antenna installation (standing wave!).

Interferences are location-dependent.

Use a radio respectively two-way radio, etc, with modern noise suppression circuits, e.g. ANL, NC or AKE FM-Select at the two-way radio, IAC and RDS at the Radio.