3-8 (E)
MAV-70
3-4. ENC-51 Board Adjustment
3-4-1. VCO Adjustment
Preparation
.
Connect as shown in the figure.
.
Disconnect the cable when a cable is connected to the
SERIAL V/A INPUT connector (CN101) on the ENC-
51 board.
.
Short jumpers JP100 (J-11) and JP200 (H-9) on the
ENC-51 board by a shorting pin.
.
Warm up for about ten minutes.
Adjustment procedure
1.
Equipment : Frequency counter and oscilloscope
Test point : TP101 (G-9)/ENC-51 board
Adj. point :
1
RV100 (H-9)/ENC-51 board
Spec. :
27.0
±
0.1 MHz
2.
Equipment : Frequency counter and oscilloscope
Test point : TP200 (J-7)/ENC-51 board
Adj. point :
1
RV1001 (J-9)/ENC-51 board
Spec. :
27.0
±
0.1 MHz
Setting after adjustment
Remove the shorting pin.
3-5. ENC-47 Board Adjustment
3-5-1. VCO Adjustment
Preparation
.
Connect as shown in the figure.
.
Disconnect the cable when a cable is connected to the
SERIAL V/A INPUT connector (CN101) on the ENC-
47 board.
.
Warm up for about ten minutes.
Adjustment procedure
Equipment : Frequency counter and oscilloscope
Test point : TP101 (F-6)/ENC-47 board
Adj. point :
1
RV100 (G-5)/ENC-47 board
Spec. :
27.0
±
0.1 MHz
TP
MAV-70
Oscilloscope
Frequency counter
CH-2
IN
CH-2
OUT
A
1
2
3
4
5
6
7
B
C
D
E
F
G
1
RV100
TP101
ENC-47 board (A side)
TP
MAV-70
Oscilloscope
Frequency counter
CH-2
IN
CH-2
OUT
3-4. ENC-51 Board Adjustment
3-5. ENC-47 Board Adjustment
A
1
2
3
4
5
6
7
B
C
D
E
F
G
8
9
10
11
H
J
JP100
JP200
TP101
1
RV100
1
RV1001
TP200
ENC-51 board (A side)