Yamaha O2R96 Service Manual page 140

02R96
2-10. CH IN 17~24 (PHONE)
Condition: Check at the [STEREO OUT L] terminal (XLR).
A. GAIN MAX
q
Gain (CH17~24)
Input Frequency Input Level
1kHz -34dBu
w
f Characteristic (CH17~24)
Condition: Permissible range of 1kHz to be standard.
Input Frequency
20Hz
40kHz
e
Distortion factor (CH17~24)
Input Frequency Output Level
1kHz
r
Level gap (CH17~24)
Level gap measured in q to be decided as follows:
Permissible range
Within 2dB
t
Noise level (CH17~24)
Condition: Measured CH IN to be shorted at 150Ω.
Permissible range
-69dBu or below
However, if not be within the above range EIN, confirm
that the measured value is (Gain at 1kHz)
B. GAIN MIN
q
Gain (CH17~24)
Input Frequency Input Level
1kHz +10dBu
w
Distortion factor (CH17~24)
Input Frequency Output Level
1kHz
e
Noise level (CH17~24)
Condition: Measured CH IN to be shorted at 150Ω.
Permissible range
-85dBu or below
2-11. Checking the action of the CH IN 1~24 Level
Meter
Condition: Input the specified levels into the CH
(PHONE) to be measured.
Concurrent inputs into CH 1~24 are
possible.
Confirm visually each LED ON/OFF of
PEAK, NOMINAL, SIGNAL.
140
Specified output level Permissible range
+4dBu +4±2dBu
Input Level Permissible range
-34dBu -1.5~0.5dB
-34dBu -1.5~0.5dB
Permissible range
+16dBu 0.02% or below
Specified output level Permissible range
+4dBu +4±2dBu
Permissible range
+16dBu 0.01% or below
Light ON
LED level
PEAK
SIGNAL
Light OFF
LED level
PEAK
SIGNAL
2-12. TALKBACK
Condition: Check at the [STEREO OUT L/R]
3. ANALOG IN/OUT check at 48kHz WORD
CLOCK INT
3-1. STEREO OUT L/R (XLR)
Condition: Input from the CH1 (XLR).
q
Distortion factor (L/R common)
-107.
Input Frequency Output Level
w
Residual noise (L/R common)
Condition: Turn OFF the [STEREO OUT] key.
Permissible range
3-2. CONTROL ROOM MONITOR OUT L/R
Condition: Input from the CH1 (XLR).
q
Distortion factor (L/R common)
Input Frequency Output Level
w
Residual noise (L/R common)
Condition: Set the [STEREO OUT] key to OFF.
Input frequency Input level
1kHz +23dBu
1kHz -8dBu
Input frequency Input level
1kHz +19dBu
1kHz -12dBu
terminal (XLR).
Set the [TALKBACK LEVEL] control to
MAX.
Turn ON the [SLATE] key of TALKBACK.
Confir m the signal through the
microphone.
Permissible range
1kHz +16dBu 0.01% or below
-92dBu or below
Set the [CONTROL ROOM LEVEL]
control to MAX.
Tur n ON the [STEREO] key of
CONTROL ROOM.
Permissible range
1kHz +16dBu 0.02% or below
CONTROL ROOM LEVEL
MAX
Reference output level
(INSERT OUT)
+17dBu
-14dBu
Reference output level
(INSERT OUT)
+13dBu
-18dBu
Permissible range
-92dBu or below