May. 2008 DD-7 5. Depress the toe of the EV-5 pedal all the way. Verify that the CHECK LED is lighted up red. 3. Insert the plug into the INPUT B jack. Verify that the CHECK LED goes dark. fig.DD-7-wave-1.eps_75 fig.DD-7-wave-1.eps_75 6. Unplug the EV-5 from the jack. 7. DSP Through Check (INPUT A Check) 6. DSP Through Check (INPUT B Check) Make the connections shown below to the INPUT and OUTPUT jacks on the DD-7, using the settings indicated. Make the connections shown below to the INPUT and OUTPUT jacks on the DD-7, using the settings indicated. INPUT A: Input a rectangular wave at 400 Hz, 800 mVp-p. INPUT B: Input a rectangular wave at 400 Hz, 800 mVp-p. INPUT A:
Input a rectangular wave at 400 Hz, 800 mVp-p. INPUT B: Input a rectangular wave at 400 Hz, 800 mVp-p. OUTPUT A: Connect the oscilloscope. OUTPUT A: Connect the oscilloscope. OUTPUT B: Connect the oscilloscope. OUTPUT B: Connect the oscilloscope. Set the oscilloscope to 500 mV/DIV, 1 ms/DIV, and coupling: DC. 1. Adjust the MODE control to the 200 ms position. Set the oscilloscope to 500 mV/DIV, 1 ms/DIV, and coupling: DC. 1. Adjust the MODE control to the 50 ms position. Verify that the CHECK LED lights up orange. Verify that the CHECK LED goes dark. fig.DD-7-wave-1.eps_75 fig.DD-7-wave-1.eps_75 2. Disconnect the plug from the INPUT B jack. 2. Disconnect the plug from the INPUT A jack.
Verify that the CHECK LED lights up red. fig.DD-7-wave-4.eps_75 Verify that the CHECK LED lights up green. fig.DD-7-wave-5.eps_75 If the waveforms grow larger, operation is correct. If the waveforms show no change, operation is faulty. If the waveforms grow larger, operation is correct. If the waveforms show no change, operation is faulty. 14