DD-20(T) fig.7 fig.9 (200 mV/DIV, 1 mS/DIV) (5V/DIV, 1 mS/DIV) 5. ANALOG BYPASS Check (includes INPUT B jack detection check) 6. MUTE Check • Set the MODE control to “TAPE.” “4” appears in the LCD. • Input a sine wave (200 Hz, 16Vp-p) from the oscillator to INPUT A(MONO) and B. • Set the MODE control to “ANALOG.” “5” appears in the LCD. • Input a sine wave (200 Hz, 16Vp-p) from the oscillator to INPUT A(MONO) and B. • Connect the oscilloscope to OUTPUT A(MONO) and B. • Connect the oscilloscope to OUTPUT A(MONO) and B. • Confirm that the waveform output from OUTPUT A(MONO) and B matches the figure below. 7. • Confirm that nothing is output from OUTPUT A(MONO) and B.
DSP THRU Check fig.8 • Set the MODE control to “STANDARD.” “6” appears in the LCD. • Input a sine wave (200 Hz, 16Vp-p) from the oscillator to INPUT A(MONO) and B. • Connect the oscilloscope to OUTPUT A(MONO) and B. • Confirm that the waveform output from OUTPUT A(MONO) and B matches the figure below. fig.10 (5V/DIV, 1 mS/DIV) Disconnect the cable from the OUTPUT B jack. • Confirm that the waveform output from OUTPUT A(MONO) and B matches the figure below. (5 V/DIV, 1 mS/DIV) 8. AD MUTE Check • Set the MODE control to “DUAL.” “7” appears in the LCD. • Input a sine wave (200 Hz, 16Vp-p) from the oscillator to INPUT A(MONO) and B. • Confirm that nothing is output from OUTPUT A(MONO) and B. 9.
ANALOG BYPASS Check • Set the MODE control to “PAN.” “8” appears in the LCD. • Input a sine wave (200 Hz, 16Vp-p) from the oscillator to INPUT A(MONO) and B. • Confirm that the waveform output from OUTPUT A(MONO) and B matches the figure below. 19