CLIOwin 7 PCI User's Manual - Audiomatica

4.6.2 CONTROLLING A TURNTABLE
Fig.4.8 Turntable control panel
This control panel helps you when you are operating a turntable; the information given
here apply to the control of the Outline ET/ST Turntable; they can be adapted to any
other device.
The turntable control is achieved with Bit 7 of the parallel port output bits, as shown
in Fig.4.6. The turntable should be connected to the parallel port of the computer by
means of a cable defined as follows:
PC side DB25 male
ET/ST side DB9 male
Pin 9 Pin 2
Pin 22 Pin 4
All other pins unconnected
The cable should be connected as in the following figure.
Fig.4.9 Outline ET/ST Turntable connections
Inside the Turntable control panel it is possible to set its Resolution (in degrees) and
Speed (in rotations per minute); the combination of these settings give the software
an indication about how much time to wait after the controlling pulse is output.
We have two controlling buttons defined as follows:
Single Pulse It is used to give a single manual triggering pulse to move the turntable
to the next position.
Link To Measurement When pressed enables the software to move the turntable
at the end of an executed measurement; this works only with the MLS and Sinusoidal
control panels. Refer to chapter 12 for an example of how to use this feature during
polar measurements.
44 Chapter 4 - CLIOwin basics