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Input frequency
1 kHz
Even channels are also the same.
(6) Maximum output
Conditions: Inspect the cannon connector and phone connector individually.
Input frequency
1 kHz
2-2
Operation confirmation of level meters 1 to 8
Conditions: Input specified level to AD824 input 1 to 8.
AD824 can also have simultaneous input of channels 1 to 8
Visually confirm the on and off of the peak, nominal and signal LEDs.
(1) On (Lit)
LED level
PEAK
NOMINAL
SIGNAL
(2) Off (Not lit)
LED level
PEAK
NOMINAL
SIGNAL
2-3
Jitter measurement
· Connect AD824 word clock out and DA824 word clock in.
· Insert MY8-AE card into the slot and connect to DSA1 via the D-sub-cannon converter box.
· Set AD824 word clock settings to 48 kHz and 44.1 kHz.
WORD CLOCK (AD824)
48 kHz
44.1 kHz
2-4
Fs operating range
· Connect the oscillator to AD824 word clock in.
(1) Fs=50.88 kHz (48 kHz+6 %)
· Set the oscillator to 50.88 kHz.
· Conduct a listening test for one minute to check that there is no noise.
Input frequency
1 kHz
(2) Fs=39.69 kHz (44.1 kHz-10 %)
· Set the oscillator to 39.69 kHz.
· Make the same input as 2-4 1 and confirm that the same output level is attained. Or, conduct a listening test for one minute
to check that there is no noise.
3.
Sound
Perform a listening test to confirm the following items.
· OUTPUT
4.
Settings after inspection
· Internal gain SW:
· WORD CLOCK IN 75 ohms:
Output level (Odd CH)
Permissible range (Even CH)
+16 dBu
Output level
+18 dBu
Input frequency
Input level (AD824)
1 kHz
1 kHz
1 kHz
Input frequency
Input level (AD824)
1 kHz
1 kHz
1 kHz
Permissible range
Less than 6 nsec
Less than 5 nsec
Input level (AD824)
+10 dBu
+18 dB
ON
Less than -54 dBu
Permissible range
Permissible range (Distortion ratio)
+18±0.5 dBu
Permissible range
+21 dBu
0 – +2 dB
+10 dBu
0 – +2 dB
-10 dBu
0 – +2 dB
Permissible range
+18 dBu
+8 dBu
-12 dBu
Output level
Permissible range
+4 dBu
+4±1 dBu
Less than 0.01 %
Reference output level
+15 dBu
+4 dBu
-16 dBu
Reference output level
0 dB
+12 dBu
0 dB
+2 dBu
0 dB
-18 dBu
DA824
28
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