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Error 2 on usb reading - Car Audio & Video

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I have also been experiencing the very frustrating "Error Code 2" issue half way thru the calibration process. Sometimes the error occurs during measurement No. 1; other times on the 2nd or 3rd measurement.
I am running a MacBookPro running OSX 10.7 (Lion Server) w/ Vmware Fusion v4.1.1 and Windows XP (SP2).
After experiencing over a dozen of failed attempts to calibrate, I started to tweak the Windows setup.
I found out after some experimentation that the issue is not so much the Alpine Imprint S/W, but much so with the USB/Serial interface hardware. The S/W has issues with error recovery, which forces the user to close and restart the application if an exception is encountered...but if the exception can be avoided in the first hand, it runs fine!
Would suggest to try the following tweaks to address the Error Code 2 issue:
(1) If using Vmware Fusion, ensure that the USB/Serial is connected. On the VMWare Fusion menu, select Virtual Machine->USB & Bluetooth->Connect Future Devices USB<->Serial. Ensure this is connected first before launching the Alpine Imprint Sound Manger (v2.10) application;
(2) The USB cable that comes with the calibration kit is quite long and I am not sure the shielding is that good. So try to straighten the cable out and not allow it to coil when connecting to laptop; this should reduce any potential interference and signal degenerating issues;
(3) Within XP, open up Control Panel->Administrative Tools->Computer Management->Device Manager, locate under "Ports" the corresponding port that the USB<->Serial interface emulates. Usually this is USB Serial Port (COM3).
Open up the Port Settings under its properties menu.Apply the following override settings:
Bits per second = 921,600 (or 115,200 is fine as well)Parity=EvenFlow Control=Hardware
Click "Advanced" button and override the following settings:Minimum Read Timeout (msec) = 10,000Minimum Write Timeou (msec) = 10,000
These simple override setting works like magic for me.I was able to complete all the 6 measures without a glitch.Hope this works for your setup as well.
PS. For subwoofer calibration I also found useful tuning down the gain beforehand on the amplifier. On the Alpine head unit, set the Subwoofer output level to very low (close to zero). On the amp-side (I am using 3 x Pioneer PRS-D4200F) set the gain switch anti-clockwise to a voltage slightly above 2V (do not over do this). Then after the calibration has completed, set it to just below 2V (clockwise rotation) to slightly elevate the output. The remaining subwoofer gain adjustment can now be done comfortably from the head unit's subwoofer output control.

Posted on Dec 04, 2011

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Insufficient ground

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