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(3) Change the connection of the oscilloscope as follows:
CH-1:
TP403/DM-89(D-6), GND: E302/DM-89(B-5)
CH-2:
TP5/DM-89(D-1), GND: E702/DM-89(D-1)
(4) METAL C adjustment
Playback the RF sweep signal portion (0:00 to 2:00) of the alignment tape CR5-1B or CR5-1B PS,
and perform the adjustment. (DNW-A22: CR5-1B, DNW-A22P: CR5-1B PS)
Adjustment point: 1RV401/DM-89(G-4)
Specifications:
See the table below.
Observation freq.
6 MHz
8 MHz
10 MHz
100%
1
DNW-A22
(5) OXIDE Y/C adjustment
Set the following RVs on DM-89 board to each specified position as show below.
(6) Stop the playback of the alignment tape CR5-1B/CR5-1B PS or eject it.
n
It is not necessary to eject the alignment tape when perform subsequent "12. DM RF Output Level
Adjustment".
DNW-A22/A22P
Specification
Reference: 100% {0 dB}
100 ±20 % {0 ± 2.0 dB}
+40
+4.0
110
% {1.0
dB}
_20
_2.0
6
8
10
[MHz]
RV202 (G-5)
RV402 (C-4)
100%
1
4
6
DNW-A22P
6-3. DM-89 Board Replacement
8
10
[MHz]
6-57
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