May. 2008 DD-7 3. Insert the plug into the INPUT A jack. Verify that the CHECK LED lights up orange. 3. Insert the plug into the OUTPUT A jack. Verify that the CHECK LED goes dark. fig.DD-7-wave-1.eps_75 fig.DD-7-wave-1.eps_75 8. DSP Through Check (OUTPUT A Check) 9. DSP Through Check (OUTPUT B Check) & CLIP Check 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. Make the connections shown below to the INPUT and OUTPUT jacks on the DD-7, using the settings indicated. OUTPUT A: Connect the oscilloscope. INPUT A:
Input a sine wave at 400 Hz, 4.0 V p-p. INPUT B: Input a sine wave at 400 Hz, 4.0 V p-p. OUTPUT B: Connect the oscilloscope. Set the oscilloscope to 500 mV/DIV, 1 ms/DIV, and coupling: DC. OUTPUT A: Connect the oscilloscope. OUTPUT B: Connect the oscilloscope. 1. Adjust the MODE control to the HOLD position. Verify that the CHECK LED has gone dark. 1. Adjust the MODE knob to the MODULATE position. Set the oscilloscope to 2.0 V/DIV, 1 ms/DIV, and coupling: DC. fig.DD-7-wave-1.eps_75 Verify that the CHECK LED lights up orange. fig.DD-7-wave-7.eps_75 Verify that the waveforms are not clipped. 2. Disconnect the plug from the OUTPUT A jack. Verify that the CHECK LED lights up green.
fig.DD-7-wave-6.eps_75 2. Disconnect the plug from the OUTPUT B jack. Verify that the CHECK LED lights up red. fig.DD-7-wave-8.eps_75 15