3-22
DNW-A100/A50/A45
DNW-A100P/A50P/A45P
3-6-5. Analog Audio Inputs (CH3/4)
Adjustment (APR-13 Board)
n
When the VTR equipped with BKNW-105 (optional kit),
Section 3-6-5 is not needed.
Preparing tools
.
Audio signal generator:
TEKTRONIX SG505-option 02 or equivalent
.
Audio analyzer:
TEKTRONIX AA501A-option 02 or equivalent
.
Extension board: EX-556 (Part No. A-8277-212-A)
.
Shorting clip
Preparation
1. Check that the shorting plug settings on the
APR-13 board are the factory settings.
(Refer to “Shorting plugs setting” in Section 3-6-2.)
2. Extend the APR-13 board with an extension
board EX-556.
n
Wait more than 30 seconds after turning off the power,
then remove the APR-13 board.
3. Check the settings on the upper control panel.
PB (audio level) controls:
CH3
8
PRESET
CH4
8
PRESET
REC (audio level) controls: CH3
8
PRESET
CH4
8
PRESET
AUDIO INPUT SELECT
8
ANALOG/AES/EBU
4. Check the setting on the sub control panel.
EMPHASIS switch
8
OFF
5. Check the settings on the connector panel.
AUDIO INPUT LEVEL switches:
CH3
8
HIGH/ON 600
Z
(right position)
CH4
8
HIGH/ON 600
Z
(right position)
6. Check that the equipment has warmed up.
Before starting the adjustment, warm up the VTR and
other equipment through the power for 20 minutes or
more.
1. Input Level Adjustment
1.
Set the audio analyzer as follows:
Function mode: LEVEL, dBm (600
Z
)
Input filter:
80 kHz LPF
CH3 adjustment
2.
Short-circuit TP100(B-1) and E100(B-2) on the APR-
13 board with a shorting clip.
3.
Input the audio signal (1 kHz,
+
4.0 dBm) to AUDIO
INPUT CH3 connector.
4.
Connect the audio analyzer’s input to AUDIO OUT-
PUT CH3 connector.
5.
Adjust the audio level on the audio analyzer.
Adj. point:
1
RV100/APR-13(B-1)
Specification:
+
4.0
±
0.1 dBm (at 600
Z
load)
6.
Remove the shorting clip on the APR-13 board.
7.
Adjust the audio level on the audio analyzer.
Adj. point:
1
RV101/APR-13(C-1)
Specification:
+
4.0
±
0.1 dBm (at 600
Z
load)
CH4 adjustment
8.
Short-circuit TP200(F-1) and E200(E-2) on the APR-
13 board with a shorting clip.
9.
Input the audio signal (1 kHz,
+
4.0 dBm) to AUDIO
INPUT CH4 connector.
10. Connect the audio analyzer’s input to AUDIO OUT-
PUT CH4 connector.
11. Adjust the audio level on the audio analyzer.
Adj. point:
1
RV200/APR-13(E-1)
Specification:
+
4.0
±
0.1 dBm (at 600
Z
load)
12. Remove the shorting clip on the APR-13 board.
13. Adjust the audio level on the audio analyzer.
Adj. point:
1
RV201/APR-13(F-1)
Specification:
+
4.0
±
0.1 dBm (at 600
Z
load)
APR-13 Board (Side A)
E100
RV100
TP801
COR101
16 18 20
COR100
0
–3
–20
+4
TP701
COR601
–20
–3
0
+4
1
2
3
4
5
A
A
B
C
D
E
F
G
A No.
LOTNO,
S NO,
APR–13
MADE IN JAPAN
RV102
RV101
TP101
TP100
RV103
E200
RV200
COR201
16 18 20
COR200
0
–3
–20
+4
RV202
RV201
TP201
TP200
RV203
TP802
TP803
TP804
E800
COR600
20 18 16
RV600
TP600
COR501
COR500
20 18 16
RV500
TP500
COR401
COR400
20 18 16
RV400
TP400
COR301
COR300
20 18 16
RV300
TP300
–20
–3
0
+4
–20
–3
0
+4
–20
–3
0
+4
3-6. Audio System Adjustment (APR-12/13 Boards)
3-6-5. Analog Audio Inputs (CH3/4) Adjustment (APR-13 Board)