Manual

21
SYSTEM – I/O PAGE
20
Delay
Select this setting to enable online adjustment
of delay (e.g. for lip-sync) using an external
switchorimpulserelay.DB2measuresthe
time interval between two switch closures, and
inserts this as its current delay.
(The “Delay” parameter on the Engine/Main
page has a range from 0 to 1000 ms). Thanks
to a silent update mechanism, the delay may
be adjusted while audio is passed through the
processor without introducing pitch change or
click noise.
Preset
Range: 2 presets, 4 presets or 8 presets
Selection between up to 8 presets is achieved
by feeding the processor a DC voltage to its
¼” jack input. The Input voltage is compared
against voltage windows that correspond to
certain presets.
Betweenthevalidvoltagewindows,invalid
windows have been inserted to protect against
erratic operation. The processor constantly
monitors the GPI input, and only if several con-
secutive measurements point to the same, valid
voltage window, a recall is performed.
The voltage windows chosen enable easy
“binary relay encoding” as shown on the next
page in fig. 1. If long cable runs are required,
HF decoupling using a ceramic capacitor
across the tip and sleeve terminals inside the
jack plug may be indicated.
The ring terminal of the ¼” jack is not
used.
If
GPI Preset mode is selected and no device is
connectedtotheGPIinput,theDB2willalways
recall preset 1 at power up.
GPI
GPI Technical Specifications
Insidetheprocessor,a10kOhmresistorconnectsthetipterminaltoa+5Vpowersupply.When
nothingisconnectedtotheGPIinput,theinputvoltagethereforeis+5V.Resistorscanbeusedto
pull down the voltage as suggested in Fig 1.
In Table 1, voltages outside the limits mentioned are to be considered invalid. No action is taken
if invalid measurements are made. GPI recall action resumes when a stable, valid measurement
again is detected.
Mode
1 of 2
1 of 4
1 of 8
Preset No
1
2
1
2
3
4
1
2
3
4
5
6
7
8
Target / Vs
1.000
0.000
1.000
0.687
0.545
0.438
1.000
0.824
0.687
0.600
0.545
0.489
0.437
0.400
Min typ / V
2.67
0.00
4.16
3.38
2.67
0.00
4.50
4.06
3.38
2.94
2.67
2.38
2.13
0.00
Target typ / V
5.00
0.00
5.00
3.44
2.73
2.19
5.00
4.12
3.44
3.00
2.73
2.44
2.19
2.00
Max typ / V
5.00
0.51
5.00
3.50
2.79
2.25
5.00
4.18
3.50
3.06
2.79
2.50
2.25
2.06
Rather than absolute voltage measurements, the windows are defined as a fraction of the
supply voltage, Vs. This voltage can be measured with a high impedance DMM on the Tip
terminal when no pull down resistors are applied. The table shows values as a fraction of Vs,
and, as a guideline, typical voltages when Vs = 5.000 V. (If the supply voltage is e.g. 5.015 V,
the table should be corrected by multiplying these values by 5.015/5).
GPI Implementation
Three modes...
1 of 2: Select between 2 presets
1 of 4: Select between 4 presets
1 of 8: Select between 8 presets
RL1
RL2
RL3
GPI Input
Select 1 of 8
Nov 1, 2002
vers #1.30
RL1
RL2
GPI Input
Select 1 of 4
RL1
GPI Input
Select 1 of 2
RL3 RL2 RL1
offoff off preset 1
offoff on preset 2
offonoff preset 3
offonon preset 4
on offoff preset 5
on offon preset 6
on on off preset 7
on on on preset 8
RL2 RL1
offoff preset 1
offon preset 2
on off preset 3
on on preset 4
RL1
off preset 1
on preset 2
tip
ring
sleeve
tip
ring
sleeve
tip
ring
sleeve
R1, 12k
R2, 22k
R3, 47k
R1, 12k
R2, 22k
nc
nc
nc
GPI Implementation
Three modes...
1 of 2: Select between 2 presets
1 of 4: Select between 4 presets
1 of 8: Select between 8 presets
RL1
RL2
RL3
GPI Input
Select 1 of 8
Nov 1, 2002
vers #1.30
RL1
RL2
GPI Input
Select 1 of 4
RL1
GPI Input
Select 1 of 2
RL3 RL2 RL1
offoff off preset 1
offoff on preset 2
offonoff preset 3
offonon preset 4
on offoff preset 5
on offon preset 6
on on off preset 7
on on on preset 8
RL2 RL1
offoff preset 1
offon preset 2
on off preset 3
on on preset 4
RL1
off preset 1
on preset 2
tip
ring
sleeve
tip
ring
sleeve
tip
ring
sleeve
R1, 12k
R2, 22k
R3, 47k
R1, 12k
R2, 22k
nc
nc
nc
GPI Implementation
Three modes...
1 of 2: Select between 2 presets
1 of 4: Select between 4 presets
1 of 8: Select between 8 presets
RL1
RL2
RL3
GPI Input
Select 1 of 8
Nov 1, 2002
vers #1.30
RL1
RL2
GPI Input
Select 1 of 4
RL1
GPI Input
Select 1 of 2
RL3 RL2 RL1
offoff off preset 1
offoff on preset 2
offonoff preset 3
offonon preset 4
on offoff preset 5
on offon preset 6
on on off preset 7
on on on preset 8
RL2 RL1
offoff preset 1
offon preset 2
on off preset 3
on on preset 4
RL1
off preset 1
on preset 2
tip
ring
sleeve
tip
ring
sleeve
tip
ring
sleeve
R1, 12k
R2, 22k
R3, 47k
R1, 12k
R2, 22k
nc
nc
nc
Calibrate
UsethisfunctiontocalibrateDB2toa
connected GPI controller (e.g. master control
relays or a potentiometer such as the TC Master
Fader).
To calibrate the GPI controller:
• ConnecttheGPIControllertotheGPIInput
jackandclickCALIBRATE.
• SettheGPIcontrollertoitsminimumposition
and click “Set Lo Threshold”.
• SettheGPIcontrollertoitsmaximumposition
and click “Set Hi Threshold”.
• PressOKtocompletethecalibration
procedure.
GPI Current voltage:
Indicates the current voltage on the GPI Input.
With no GPI controller connected, the voltage is
1000 mV. Therefore it is worth noticing that the
maximum indicated value on e.g. Master Fader
is a lower voltage value than the minimum
value.