SYNCHRO Excite +: Service & maintenance manual - rev. 7.1
Page 3.9
3.4. CARDIO RECEIVER BOARD
The receiver reception area is approximately a circle with a 90cm radius. If there is
electromagnetic noise produced by high voltage lines, radio transmitters, monitors,
motors ecc… within this area, the receiver becomes saturated and no longer receives
any signal.
3.4.1. HS (HAND SENSOR)
This board manages the signals received from the Hand Sensors, used by the user when exercising.
The Board receives the +5Vdc power supply, from the Display Board.
The Receiver Board, communicate with the Display Board in a positive logic mode. When the
Board is in stand-by, the signal is +5Vdc; as soon the Board receives a reliable source of heart rate
signal change to 0Vdc and then, for each heartbeat detected, generates a pulse going back to +5Vdc.
The Display Board, receives the signal generate from the Hand Sensor (contact signal) with a
100msec width signal.
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