Abstract: A measurement apparatus and a receiver apparatus are communicatively connected in a wireless manner. Biological signal data is obtained from a detector attached on a living body. A data packet is prepared from the biological signal data. A first CRC of the biological signal data is calculated and appended to the data packet. The data packet is periodically transmitted with the first CRC from the measurement apparatus to the receiver apparatus. A second CRC of the data packet received at the receiver apparatus is calculated. The received data packet is verified when the second CRC is coincident with the first CRC. Acknowledgement data is transmitted from the receiver apparatus to the measurement apparatus when the received data packet is verified. The data packet is retransmitted from the measurement apparatus to the receiver apparatus when the acknowledgement data is not received at the measurement apparatus within a prescribed time period from a previous transmission of the data packet.

Abstract: A system for performing telemetry of multi-channel biological signals obtained from electrodes attached to a subject, is provided with a transmitter and a receiver. In the transmitter, a converter converts the multi-channel biological signals to digital data, and a storage stores the digital data. In the transmitter, a first transceiver is operable to transmit a prescribed amount of the digital data stored in the storage, and a battery is operable to supply a battery voltage to the first transceiver. In the transmitter, a switch places the battery in either a first state where the battery voltage is supplied to the first transceiver or a second state where the battery voltage is not supplied to the first transceiver, so that the first transceiver intermittently transmits the digital data. In the receiver, a second transceiver is operable to receive the digital data transmitted from the first transceiver. The received digital data is to be reproduced multi-channel biological signals at an output device.

Abstract: A measurement apparatus and a receiver apparatus are communicatively connected in a wireless manner. Biological signal data is obtained from a detector attached on a living body. A data packet is prepared from the biological signal data. A first CRC of the biological signal data is calculated and appended to the data packet. The data packet is periodically transmitted with the first CRC from the measurement apparatus to the receiver apparatus. A second CRC of the data packet received at the receiver apparatus is calculated. The received data packet is verified when the second CRC is coincident with the first CRC. Acknowledgement data is transmitted from the receiver apparatus to the measurement apparatus when the received data packet is verified. The data packet is retransmitted from the measurement apparatus to the receiver apparatus when the acknowledgement data is not received at the measurement apparatus within a prescribed time period from a previous transmission of the data packet.

Abstract: A system for performing telemetry of multi-channel biological signals obtained from electrodes attached to a subject, is provided with a transmitter and a receiver. In the transmitter, a converter converts the multi-channel biological signals to digital data, and a storage stores the digital data. In the transmitter, a first transceiver is operable to transmit a prescribed amount of the digital data stored in the storage, and a battery is operable to supply a battery voltage to the first transceiver. In the transmitter, a switch places the battery in either a first state where the battery voltage is supplied to the first transceiver or a second state where the battery voltage is not supplied to the first transceiver, so that the first transceiver intermittently transmits the digital data. In the receiver, a second transceiver is operable to receive the digital data transmitted from the first transceiver. The received digital data is to be reproduced multi-channel biological signals at an output device.