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QM2000 pinouts |
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Caution
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LASERSHOW DESIGNER
Using multimedia in
Showtime 2000
Combining two shows into one
Running two projectors from one board
Pinouts and info for Pangolin boards:
• QM2000
(new, PCI bus)
GENERAL INFO
Scan angle tables
About the ILDA Test Pattern
About DMX512 (lighting control)
Making 3D, floating images
Laser Show Resource Guide
TROUBLESHOOTING
Troubleshooting LD and LD2000
Troubleshooting DMX
Returning hardware to Pangolin
The chart below lists pins for the DB-25F female
connector on the QM2000. This connector conforms to the ILDA DB-25
connector standard. You can use a Pangolin-supplied adapter cable to
connect the QM2000 to a Pangolin (older QM32-style) DB-25 connector.
The ILDA standard uses
differential signals, primarily because they are more immune to noise. For
example, you will see X+ and X- signals defined below. The positive
indicates a normal signal; the negative indicates an inverted signal.
What is a differential voltage?
A differential voltage is the voltage between the
normal signal line and the inverted signal line. For example, if pin 1 is
+2.4V and pin 14 is -2.4V, then the X signal's differential voltage is
+4.8V.
Differential signals are used
because they are much more immune to noise than "single-ended"
signals. Any noise induced in the signals -- say, from running the cables
next to AC power cords -- will be cancelled out when the normal and
inverted signals are added together.
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QM2000 Pinouts |
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| Signal name |
Pin |
Notes |
| X+ | 1 | -5V to +5V |
| Y+ | 2 | -5V to +5V |
| Intensity/Blanking + | 3 | 0V to +2.5V |
| Interlock A | 4 | Connected to pin 17 inside the QM2000 |
| R+ | 5 | Red, 0V to +2.5V |
| G+ | 6 | Green, 0V to +2.5V |
| B+ | 7 | Blue (typically 476 nm), 0V to +2.5V |
| Deep blue + | 8 | Violet (typically 457 nm), 0V to +2.5V |
| Yellow + | 9 | Yellow, 0V to +2.5V |
| Cyan + | 10 | Brightest blue (usually 488 nm cyan), 0V to +2.5V |
| Z+ | 11 | Depth Z (not intensity), -5V to +5V |
| Not connected | 12 | |
| Shutter | 13 | 0V to +5V |
| X- | 14 | -5V to +5V |
| Y- | 15 | -5V to +5V |
| Intensity/Blanking - | 16 | -2.5V to 0V |
| Interlock B | 17 | Connected to pin 4 inside the QM2000 |
| R- | 18 | -2.5V to 0V |
| G- | 19 | -2.5V to 0V |
| B- | 20 | -2.5V to 0V |
| Deep blue - | 21 | -2.5V to 0V |
| Yellow - | 22 | -2.5V to 0V |
| Cyan - | 23 | -2.5V to 0V |
| Z- | 24 | -5 to +5V |
| Ground | 25 | |
Where to connect X and Y
There are two types of scanner amps. For this discussion we'll talk about the X signal; the Y signal works the same but of course uses different pins:
-
Single-ended amps have two input lines per signal, such as "Ground" and "X". Examples include Catweazle and Laser Media. With these amps, connect the QM2000's Ground (pin 25) and the +X (pin 1) lines. Do not connect the -X (pin 14) line.
-
Differential amps have three input lines per signal, such as "-X", "Ground" and "+X". Examples include Cambridge, GS MiniSax and TurboTrack. With these amps, simply connect the appropriate lines on the QM2000: -X (pin 14), Ground (pin 25) and +X (pin 1).
Where to connect intensity and color
If you have a single-color projector, use the Intensity/Blanking line
(pins 3 and 16). If you have a multiple-color projector, use the
appropriate color lines (pins 5-10 and 18-23).
Just as with scanner amps,
intensity/color drivers can be divided into two types. However, note that
the way you connect the QM2000 to single-ended scanner amps is different
than the way you connect to single-ended drivers. In the former case,
you'll use Ground and normal (+); iin the latter case, you'll use inverted
(-) and normal (+).
For this discussion we'll talk
about the "Red" line, but the other signals work the same way of
course.
-
Single-ended drivers have two input lines per signal, such as "Ground" and "Red". Examples include A+A, MVM and NEOS (4-channel driver). With these amps, connect the QM2000's -Red (pin 18) to the driver's "Ground", and the +Red (pin 5) to the driver's "Red". There is a gyrator circuit on the QM2000 which causes this connection to output in the range 0 to +5V.
-
Differential drivers have three input lines per signal, such as "-Red", "Ground" and "+Red". Examples include NEOS 6- and 8-channel drivers. With these amps, simply connect the appropriate lines on the QM2000: -Red (pin 18), Ground (pin 25) and +Red (pin 5).
Where to connect ground
The ground line (pin 25) should be connected to the ground on your
projector. This may be accessed through the projector's connector, or you
may have to physically ground to the projector's case, or the third
(grounding) pin on the projector's electrical cable.
Ideally, the cable going from
the QM2000 to the projector will have its shield (wire mesh or foil wrap
around the cable) connected to the ground line (pin 25). But you should
still be OK even if you are using prebuilt cables such as standard
parallel extension cables, and you don't know whether the shield is
connected to the ground.
Note on interlock lines A and B
The purpose of the two interlock lines is so that a
projector can tell when it is properly connected to an ILDA-compatible
signal source.
The projector will put a
current or signal into pin 4. The same current or signal should be present
back at the projector when reading pin 17. (This is because pins 4 and 17
are connected together on the QM2000 board.)
If no current or signal is seen
on pin 17, it means the DB-25 connector is not plugged into the projector.
This page last updated: Thursday, June 28, 2007 09:51 PM
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