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3-7-4. RX PROMPT VIDEO RF AGC Adjustment
Rank:
B
Note:
When adjusting this step, the length of
triaxial cable is reguired 50 to 150 m.
Adjustment of BVP-700/700P must be
completed.
Equipment:
Oscilloscope,
Video signal generator (10 STEP signal)
To be extended:
DM-94 board
Preparation
• S4 (CCU → CAM/CAM → CCU)/
MD-83 board (BVP side) → "CAM → CCU"
• Remove the green harness of MPX filter from CN35
(PROMPT) connector on DM-97 board (BVP side).
And connect its harness to CN27 (PROMPT RE-
VERSE)/MB-430 board (BVP side).
• S5 (TX← → RX)/
DM-94 board (CCU-700A/700AP) → "RX"
• S6 (TX← → RX)/
DM-94 board (CCU-700A/700AP) → "RX"
• S1 (MODE AUTO/MAN)/
DM-94 board (CCU-700A/700AP) → "MAN"
• S2 (CABLE LENGTH)/
DM-94 board (CCU-700A/700AP) → "1"
• Feed the 10 STEP signal from the video signal generator
to PROMPTER connector (camera side panel).
Test point:
pin D34 (GND: pin C34)/
Adjusting point:
1RV22 (RF AGC DLY)/
Adjustment Procedure
• Turn 1RV22 (RF AGC DLY)/DM-94 board counter-
clockwise slowly from the right most position and stop
where the V SYNC portion at waveform becomes flat.
(Take care not to over-turn.)
CCU-700 A
CCU-700AP
Note: After the adjustment, set the switches as follows.
• S4 (CCU → CAM/CAM → CCU) switch/
• Return the green harness of MPX filter to CN35
(PROMPT) connector on DM-97 board (BVP side).
• S5 (TX← → RX) switch/DM-94 board → "TX"
• S6 (TX← → RX) switch/DM-94 board → "TX"
• S1 (MODE AUTO/MAN) switch/
• S2 (CABLE LENGTH) switch/DM-94 board → "0"
• Remove the BNC cable from the PROMPTER
connector/CCU rear panel.
E15
extension board
DM-94 board
RV19
RV20
TP20
CV1
*
TP21
TP21
DM
(PANEL SIDE)
V rate
3-7. PROMPT VIDEO Cable Compensation System Adjustment
MD-83 board (BVP side) → "CCU → CAM"
DM-94 board → "AUTO"
TP18
E6
TP12
RV16
RV8
E5
TP26
RV7
TP10
RV6
E10
TX
TP9
S5
RV24
RX
RV3
TP6
E11
RV5
RV21
TP8
E12
RV4
RV2
TP5
ON
TP7
*
S4
TP4
E2
TP22
CV3
LV1
TP2
TX
TP13
CV2
TP3
S6
E7
LV2
RX
ON
RV1
S3
TP22
E13
Y AGC COUNT
E1
RV22
LV3
RV23
E3
TP17
RV9
E14
RV17
TP19
RV12
TP11
-
5
+12
-
12
+5
-
-
Y
R
Y
B
Y
Y
GND
-
R
Y
-
B
Y
DM-94 BOARD (COMPONENT SIDE)
E9
TP23
RV18
TP24
E16
TP25
TP16
RV15
TP15
RV14
E8
RV13
RV11
TP14
RV10
TP1
E4
S1
MAN
AUTO
S2
CABLE
LENGTH
SUFFIX-12 ONLY
*
3-37
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