Yamaha AD8HR Service Manual page 57

5-1. WORD CLOCK INT
Conditions: Select a WORD CLOCK value from the following table.
q Jitter
WORD CLOCK
INT44.1kHz
INT48kHz
INT88.2kHz
INT96kHz
5-2. WORD CLOCK EXT
Conditions: Select the following for WORD CLOCK.
Select WORD CLOCK during testing of WORD CLOCK IN.
Select DIGITAL OUT A during testing of DIGITAL OUT A.
During WORD CLOCK IN testing, select the oscillator frequency from the values in the following table.
During DIGITAL OUT A testing, select the System Two frequency (Sample Rate) from the values in the following table.
q Jitter (for both WORD CLOCK IN and DIGITAL OUT A)
WORD CLOCK
44.1kHz
48kHz
88.2kHz
96kHz
6. Measurement of double-channel mode Fs
Conditions: Use System Two.
Test DIGITAL OUT A on CH 1 & 2.
WORD CLOCK INT96kHz
q Start up the system by setting the power switch to ON while holding down the WORD CLOCK key and Channel Select
Button [2] key. Now check that "AE2" appears on the 7 segment LED.
w Check that the value on the Digital I/O panel INPUT screen of System Two is as shown below.
Sample Rate-ISR : 48kHz ± 0.1kHz
7. Factory settings
Initializing (Factory Preset)
Turning the power ON while holding down the Channel Select Button [4] key and [+48V] key to start up allows initializing
the system to the factory settings. (+48V MASTER SW: OFF)
Value is as follows.
WORD CLOCK INT 48kHz
HA GAIN 10dB (All CH)
+48V OFF (All CH)
HPF OFF (All CH)
HPF FREQ 80Hz (All CH)
GAIN TRIM Factory setting value (All CH)
LED luminance 7 (Max)
Others: switches not controlled by the CPU are as follows.
+48V MASTER: OFF
PC RS422: RS422
Tolerance Range
2nsec or less
2nsec or less
2nsec or less
2nsec or less
Tolerance Range
5nsec or less
5nsec or less
5nsec or less
5nsec or less
AD8HR
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