D-25/D-30 ADDA-2
5
1.
2.
3.
4.
AC
VOLTMETER
CH 1
CH 2
CH 1
CH 2
CH 1
CH 2
D-25 / D-30
AUDIO OUT
(XLR)
AUDIO IN
(XLR)
5030
BAL OUT
BAL IN
UNBAL
OUT
UNBAL
IN
CH 1
CH 2
OSC
1-2. AD Level Adjustment
Fig. 2
Set up the D-25/D-30 as follows.
REF Marker position
: -12dB
Sampling Frequency
: 44.1kHz
A1, A2 INPUT MONITOR Key
: ON position
Connect the sine wave oscillator, Model 5030, and AC volt meter with D-25/D-30 as shown in Fig. 2.
Output a 1kHz, +4dBm sine wave signal from the sine wave oscillator. Under this setting, a 1kHz, +4dBm
sine wave signal will be applied to the D-25/D-30 audio input terminal.
Adjust R191 (CH 1) and R291 (CH 2) on the ADDA-2 PCB so that the AC volt meter reading is -10dBV.
Adjusting points :
R191 (for CH 1) on ADDA-2 PCB
R291 (for CH 2) on ADDA-2 PCB
