5-13
DSR-300/P(E)/V1
5-7. CHECK AFTER ADJUSTMENT
Equipment and Tool
.
Alignment tape, XH2-1AST
.
RF extension tool
.
Oscilloscope
Setting
1. Connect the RF extension tool to CN775 of RP-
91 board.
2. Connect the oscilloscope as follows.
CH1:
RF/RF extension tool (RF waveform)
CH2:
JSW/RF extension tool (Switching
waveform)
Trigger: CH2
3. Select maintenance menu No. 604-10, center ITI
mode for tracking adjustment. (Refer to Section
5-2.)
4. Insert an alignment tape into the unit.
5. Perform checks after Section 5-7-1.
5-7-1. Tracking Check
1. Set the FWD search/REV search mode,
assuming that the output level of the RF
waveform is A (= 100 %).
2. Set the PLAY mode, assuming that the RF
waveform output level is B (= 65 %).
3. Check that the A and B levels are Specification 1.
4. Check to see that the difference in the amplitude
between Emax and Emin in the FWD mode is
less than 17 % of the amplitude (A = 100 %) in
the FWD/REV search mode. (Specification 2)
5. Check to see that no significant fluctuations are
observed in the waveform. (Specification 3)
Specification 1
B
A
=
0.65
A
B
FWD search or REV search
A = 100 %
FWD mode
Emax
Emin
Specification 2
(Emax
_
Emin)
<
17 % or ( A)
2.5
15
Specification 3
C
<
A
1
15
C
C
A
