Pioneer DDJ-SX2 Service Manual page 31

5
1. Measurement of Jog dial rotation time
This controller should measure the rotation time by rotating Jog dial during Measurement mode.
In particular, when Jog dial is turned with 233.1 rpm (33.3 X 7) or more during Measurement mode, the controller should
measure difference between time of when the rotation speed slows down to 99.9 rpm (33.3 X 3) and time of when it slows
down to 49.95 rpm (33.3 X 1.5).
(The controller should measure "T1" shown in Figure-8.)
But, when the rotation speed is less than 233.1 rpm, the controller does not measure.
Figure-8 Characteristic example of when Jog dial is turned
250 rpm
Speed up
150 rpm
100 rpm
50 rpm
[Trigger of which measure Jog dial rotation time]
1) In order to measure the rotation time for left-side Jog dial, turn left-side Jog dial clockwise or counterclockwise during
Measurement mode.
2) In order to measure the rotation time for right-side Jog dial, turn right-side Jog dial clockwise or counterclockwise during
Measurement mode.
[Posterior condition]
When the rotation speed is more than 233.1 rpm, measurement value ("T1" shown in Figure-8) is indicated using Channel
Level Indicator and LEDs within left side SLIP buttons are unlit (*1). Indication method by Channel Level Indicator is common
to both side.
The measurement unit is "milli second".
When the rotation speed is less than 233.1 rpm, all Channel Level Indicators are unlit and LED within SLIP button of the left
side is lit.
The specified range is 65 ± 35 msec.
Above figure is shown "235 msec".
*1: If a place of a measurement value is "0", all segments of the related Channel Level Indicator are unlit.
Channel Level Indicator (CH3) is not used in Measurement mode.
5
6
Jog dialrotation is started.
x x x
6
7
Slow down
T1
Time
not used
9
8
7
6
5
4
3
2
1
0 (all off)
DDJ-SX2
7
8
A
B
Jog dial rotation is stopped
C
D
E
F
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