Installation guide

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What to do if the Project Icon Appears Gray in the Explorer
Projects may be disabled if the corresponding project file is read-only. This may occur if the
project file is on a read-only medium, such as a CD-ROM, or if the file property is set to read- only.
Copy the project file to a writable medium and ensure the file properties do not include read- only.
Now you should be able to open the project and use it normally.
What to do if Audio is Lost During a Measurement
In old versions of the PDC firmware, during or after a measurement, the output signal can 'look'
like it is outputting (on the IO Manager), but no signal is actually coming out. First check that the
IO Manager has not placed the unit in mute, otherwise restart the PDC to fix the problem.
What to do if the PC does not Detect the PDC via USB Cable
1. The PC may not detect the PDC if the firmware does not support USB. Check the firmware
installed on the PDC by connecting via RS232 and reading the firmware version number in the
bottom right quadrant of DEQX-Cal's IO Manager. The firmware should be 45.6 or higher. If not
upgrade the firmware (See Upgrading the Firmware in the Using DEQX CalibratedTM - Step by
step section).
2. Sometimes the PC does not automatically detect the PDC when the PDC is first connected via
USB. Try switching the PDC off then on again.
3. The PC may not detect the PDC if the USB cable is longer than 3m. Try a shorter USB cable.
4. The PC's USB port (or ports) may not be functioning properly. Does the PC detect other USB
devices when they are connected to the same USB port that the PDC was connected to?
If not then the PC is faulty. 5. Sometimes it helps to try swapping USB ports on the PC. 6. As a
last resort try restarting your PC.
What to do if the Communications between the PDC and the PC Drop Out. If you lose
communications between the PDC and the PC, try
1. Unplugging then plugging the USB cable
2. Cycling the standby button (ie pressing it once to put the PDC in standby, then pressing it
again to turn it back on)
3. Cycling the power switch at the back of the PDC.
If you are not certain whether communications are normal, double click on the link status icon to
load the Link Debug dialog. This displays the messages between DEQX Calibration and the PDC.
Messages scroll rapidly up the dialog when the link is operating normally.
The link debug dialog
What to do if the Sound is Not What You Expected
Due to the complexity of sound systems and the correction process, there can be a number of
reasons why the initial listening experience once your speakers and / or room have been
corrected with DEQX is not what you expected. For example, sometimes one or more of the
drivers may become out of phase. To test this, try swapping the polarity of each driver in turn,
then both tweeters, then both woofers and so on, to see how the sound changes. You can use
the Polarity Buttons of the IO Manager to do this.
The correction process changes the sound level of various frequencies and thus can change the
overall sound level of the corrected signal, compared to the uncorrected signal. Consequently, if