Yamaha ACU16-C Service Manual page 30

ACU16-C
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2.2 Inspection of analog output (CH1 to CH16)
2.2.1 Gain
Input frequency Input level
1KHz -14dBFS
The range of the level difference between channels is specified as follows.
Tolerance
Within 1dB
2.2.2 Frequency response
Condition: The Tolerance is 1kHz as reference.
Input frequency Input level
20Hz -14dBFS
20KHz -14dBFS
2.2.3 Total harmonic distortion
Input frequency Input level
20Hz -14dBFS
1KHz -14dBFS
20KHz -14dBFS
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L 13942296513
2.2.4 Cross talk between odd number CH and even number CH
Condition: The signal is applied to the odd number CH side.
Input frequency Input level
1KHz 0dBFS
The same applies to the even number CH side.
2.2.5 Maximum output
Input frequency Input level
1KHz 0 dBFS
Condition: The hot or cold terminal is connected to the ground respectively. (unbalance)
Input frequency Input level
1KHz 0 dBFS
2.2.6 Residual noise
Input level Tolerance
-∞ dB -92dBu or less
3. Factory settings before shipment
q POWER SW : OFF
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Specified output level
+4dBu
Tolerance
-1.5dB~+0.5dB
-1.5dB~+0.5dB
Output level Tolerance
+4dBu 0. 05% or less
+4dBu 0. 05% or less
+4dBu 0. 05% or less
Output level (odd number CH) Tolerance (even number CH)
+18dBu
Output level
+18dBu
Output level
+18dBu +18dBu±1.5dB
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8
Tolerance
+4dBu ± 1dBu
Q Q
3 6 7 1 3
-62dBu or less
Tolerance Tolerance (T. H. D.)
+18dBu±1dB 0. 01% or less
Tolerance Tolerance (T. H. D.)
0. 01% or less
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9 4 2 8
1 5 0 5 8 2 9 9 4
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