Pioneer DDJ-SX2 Service Manual page 33

5
[Preparation of when check drift]
Firstly, Select knob or fader of which check drift.
In order to select it, turn the Rotary selector clockwise or counterclockwise.
Whenever the Rotary selector is turned, lighting LED is moved according to the order shown in Figure-9.
Knob or fader of which check drift can be identified by lighting LED.
[Trigger of which observe drift]
In order to start observation of drift, press the Rotary selector.
In order to clear measured result of drift and start new observation of drift, press the Rotary selector again.
The controller should store A/D converted value for knob/fader as "reference value" right after the Rotary selector is pressed.
The controller should always calculate difference between the "reference value" and latest value during observation.
The controller should indicate maximum difference value until now as drift.
If latest difference value is more than past maximum difference value, the drift value should be used the latest difference value.
If not, the drift value should be used not the latest difference value but past maximum difference value.
[Posterior condition]
Segments of Master level indicator are lit depending on amount of the drift.
The controller should always indicate both negative and positive maximum drift value at the same time until the Rotary
selector is pressed next.
Table-5 Relation between amount of drift and Master level indicator
Amount of drift
+1 -18 dB
+2 -18 dB and -6 dB
+3 -18 dB, -6 dB and 0 dB
+4 -18 dB, -6 dB, 0 dB and +4 dB
+5 or more -18 dB, -6 dB, 0 dB, +4 dB and "OVER"
-1 "OVER"
-2 +4 dB and "OVER"
-3 0 dB, +4 dB and "OVER"
-4 -6 dB, 0 dB, +4 dB and "OVER"
-5 or less -18 dB, -6 dB, 0 dB, +4 dB and "OVER"
Figure-10 Lighting pattern of Master level indicator during drift observation
Pattern 1 Pattern 2 Pattern 3
5
6
Master level indicator
Lighting segments
Pattern 4 Pattern 5
DDJ-SX2
6
7
Lighting pattern
Pattern 1 Right-side
Pattern 2 Right-side
Pattern 3 Right-side
Pattern 4 Right-side
Pattern 5 Right-side
Pattern 6 Left-side
Pattern 7 Left-side
Pattern 8 Left-side
Pattern 9 Left-side
Pattern 10 Left-side
Pattern 6 Pattern 7 Pattern 8
7
8
A
B
C
Side
D
E
Pattern 9 Pattern 10
F
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