Yamaha SP2060, Service Manual

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SP2060
55
Note : Test No. 2 (MUTE ON) is not used in ANALOG test.
2-4. Digital Input Test
Input AES/EBU professional formatted signal to DIGITAL INPUT terminal and then measure the output signal obtained at
OUTPUT 1, 2 terminals.
For the details of the measuring procedures, refer to “TEST PROGRAM 3-9. DIGITAL IN Test”.
2-4-1 Test when WORD CLOCK is AES 96 kHz
Measure the following items by using test No. 1.
Conditions for each test No. are as shown below.
3
Noise level
Terminate the INPUT A, B terminals with the resistances of 150
Ω
and then measure the output level obtained at OUTPUT
1~6 terminals.
Variation width
-79 dBu or less
4 Level difference among OUTPUT 1~6 terminals
The range of difference in the gain measured in
1
is specified as follows.
Variation width
Within 1 dB
5 Crosstalk between A and B channel
5
-1 Crosstalk from channel A to Channel B
Terminate the INPUT B terminal with the resistance of 150
Ω
.
Input signal specified below to INPUT A terminal and then measure the output signal obtained at OUTPUT 1, 3, 5
(odd numbers channel) terminals and OUTPUT 2, 4, 6 (even numbers channel) terminals.
Input frequency
1 kHz
Input level
+22 dBu
Output level
(odd numbers channel)
+22
±
0.1 dBu
Variation width
(even numbers channel)
-58 dBu or less
5 -2 Crosstalk from channel B to Channel A
Terminate the INPUT A terminal with the resistance of 150
Ω
.
Input signal specified below to INPUT B terminal and then measure the output signal obtained at OUTPUT 2, 4, 6
(even numbers channel) terminals and OUTPUT 1, 3, 5 (odd numbers channel) terminals.
6 Maximum output
Input frequency
1 kHz
Input level
+24 dBu
Variation width
+23 dBu or more
Variation width (Distortion factor)
0.01 % or less
7
Distortion Factor
Input frequency
1 kHz
20 Hz
40 kHz
1 kHz
Input level
+4 dBu
+4 dBu
+4 dBu
+22 dBu
Output level
+4
±
0.1 dBu
+4
±
0.1 dBu
+4
±
0.1 dBu
+22
±
0.1 dBu
Variation width
0.05 % or less
0.05 % or less
0.05 % or less
0.007 % or less
Input frequency
1 kHz
Input level
+22 dBu
Output level
(even numbers channel)
+22
±
0.1 dBu
Variation width
(odd numbers channel)
-58 dBu or less
Test no. WORD CLOCK Fs
1
2 AES
AES 96 kHz
48 kHz