15.3.2 ECG Data Contains NoiseIf the acquired ECG data displays unacceptable noise levels, do the following:• Check the patient’s position.The patient should remain motionless during the acquisition of a resting ECG.• Use the Hookup Advisor indicator to help determine the cause of the noise.For more information, refer to 7.1 Hookup Advisor on page 69.• Verify the electrodes are placed properly.Refer to 4.2 Electrode Placement on page 54 for information on proper electrode placement.• Verify the electrodes are applied correctly.You must remove perspiration, excessive hair, lotions, and dead skin cells from the electrode site.Refer to 4.1 Preparing the Patient’s Skin on page 53 for more information.• Check for defective or expired electrodes.Replace the electrodes if there are any questions about their effectiveness.• Check for defective, broken, or disconnected leadwires.Replace the leadwires if there are any questions about their effectiveness. Refer to 3.3 Connectingthe Patient Cable on page 47.• Consider using filters, ADS, and FRF to help eliminate or reduce ECG noise.For more information, refer to 7.2.2 ECG Options on page 71, 8.2.2 Arrhythmia PrintingOptions on page 82, or 10.1.3 Stress Options on page 90.15.3.3 External Stress Equipment does not MoveIf the external stress equipment does not move automatically when expected, do the following:• Verify the correct stress equipment is selected in Basic Setup.For more information, refer to 12.1 Basic Setup on page 104.• Verify the selected stress equipment is supported.For a list of supported stress equipment, refer to 3.7 Connecting External Devices (StressOption) on page 50.• Verify the stress equipment is connected to the cart.External stress equipment is connected to the cart through a serial cable. For more information,refer to 2.2.1.2 Rear View on page 33.• Verify the protocol is set up to activate the stress equipment.The protocol can set the stress equipment’s speed and grade or load. For more information, refer to12.4.2 Editing Stress Protocols on page 124.• Verify the Stop TM button is not depressed.For more information, refer to 10.1.2 Stress Test Keys on page 90.Operator Manual 15.3 Equipment Problems2053535-002 Revision T MAC 2000 ECG Analysis System 172/198