Becker Traffic Pro 7949 Installation Manual page 12

Mechanical speedometer with built-in speed sensor in the speedometer cable
• Remove the signal from the speed sensor, extend and connect to
socket A pin 1.
• Minimum requirement for the signal:
0 Hz - 4 kHz/square-wave signal (no inductive sensor)
Low level < 1.5 V, High level 5 V - 16 V
If you do not know the exact installation position/location of the
speed signal, please consult the vehicle manufacturer.
Mechanical speedometer without speed sensor in the speedometer cable
A speed sensor must be built into the speedometer cable to generate a
digital signal.
The VDO Adapter 2152.30300000 or a vehicle-specific adapter that
fulfils the minimum requirements can be used. The VDO speed sensor
is suitable for direct installation on the gearbox (no further installation
parts required) or in the speedometer cable (in conjunction with
additional universal installation parts).
If the sealed speedometer cable is released, a correct display
cannot be guaranteed. Incorrect installation leads to improper
functioning of the navigation system or of the speedometer.
Installation Guide
GAL signal
A
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