Roland DR-880 Specifiche Scaricare il pdf (Pagina 26)

Dec.2004

10-8-4. Check the [PHONES]

waveform.

fig.outputdacheck14.eps

Amplitude: 4.9--6.1 [Vp-p]

mute off

fig.outputdacheck15.eps

mute on

10-8-5. Check the DIGITAL OUT

waveform.

fig.outputdacheck16.eps

Amplitude: 4.0--5.0 [Vp-p]

* It is not necessary to check MUTE.

Press the [BANK] switch to proceed to the next test item.

11. AF Gain check

fig.afgaincheck1.eps

Input a square wave (200 Hz, 100 mVp-p) from the “GUITAR/BASS INPUT.”

Check the square wave that is output from “MASTER OUT L (MONO)/R.”

fig.afgaincheck2.eps

Amplitude: 1.3--1.5 [Vp-p]

Press [BANK] to proceed to the next test item.

12. IN-OUT check, Residual

Noise check

fig.inputadcheck1.eps

12-1. Check the “MASTER OUT” L

(MONO)/R waveform.

Input a sine wave (200 Hz, -10 dBm) from the “GUITAR/BASS INPUT.”

On your oscilloscope, set VOLT/DIV to 5 [V].

Check the sine wave that is output from “MASTER OUT L (MONO)/R.”

fig.inputadcheck2.eps

VOLT/DIV:5V TIME/DIV:1mS

Amplitude: 9.0--12 [Vp-p]

If distortion is visible in the waveform, the result is NG.

Remove the plug from the “GUITAR/BASS INPUT.”

fig.inputadcheck3.eps

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Roland DR-880 Specifiche Pagina 26