CONTENTS
How to get started………………………………………………………………….. 2
1. FINEQC calibration procedure……………………………………………… 3
1.1 Output level………………………………………………………………….. 3
1.2 SPL Loopback calibration………………….………………………………. 4
1.3 Impedance (Z) Loopback calibration using FINELab hardware……….. 5
1.4 Impedance (Z) calibration using soundcard…………………………….. 6
1.5 Microphone calibration…………………………………………………….. 7
1.6 Adapter for LOUDSOFT FL1 microphone………………………………. 8
2. FINELab hardware box……………………………………………………….. 9
2.1 Front panel………………………………………………………………….. 9
2.2 Rear panel………………………………………………………………….. 11
2.3 Main Specifications………………………………………………………… 12
3. Login – Users…………………………………………………………………... 13
4. Tutorial………………………………………………………………………….. 14
4.1 Statistics…………………………………………………………………….. 14
4.2 QC testing…………………………………………………………………… 15
4.3 Golden average driver/preproduction……………………………………. 17
4.4 Edit limits……………………………………………………………………. 19
4.5 Measurement……………………………………………………………….. 21
4.6 Test in a normal room……………………………………………………… 25
4.7 Subwoofer in near field…………………………………………………….. 29
4.8 FINEBuz – Rub & Buzz detection………………………………………… 30
4.9 Thiele/small (TS) parameters……………………………………………… 32
4.10 Typical test setup procedure…………………………………………….. 33
5. LOUDSOFT microphone FL1 data sheet………………………………….. 34
6. Guide to QC measuring method……………………………………………. 35
7. Keep built-in soundcard for windows sounds while using FINELab…. 36
2
HOW TO GET STARTED
IMPORTANT
1. First install FINELab QC software from the CD without hardware connected.
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2. Then connect the power supply to the hardware box
3. Connect the hardware box to the computer with the USB cable
4. Install sound driver UA-25 from the CD
5. Start FINEQC and log in as engineer (no password needed now)
6. Calibrate FINEQC according to page 3, 4, 5 and 6
Now the system is ready to run.
• Open some example files, which are shown in this manual at page 19
• Start your own measurements using either: New “based on” existing file or New
• When defining your test with “Edit QC test” use “select Bands” to load standard limits like
Tweeter, Subwoofer etc.
• When you have used FINEQC for some time, please tell us what you like and dislike and give
us your proposal to improve the system. We will then try to make the system better and give
you a free update for your help.
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1. FINELab CALIBRATION PROCEDURE
1.1 Output level
Soundcard only:
Connect UA-25xx output (Phone/Jack) to the input of your amplifier.
Make sure the output (upper right on the UA-25xx) is turned fully up. Then
turn the volume on your amplifier almost half way up, until reading appr. 0.7-
1.4Vrms, when clicking “Test”.
Connect a True RMS Voltmeter to the output of FINELab/Power amplifier.
Click “Test” button.
An RMS Voltage around 1V RMS should be measured on the Voltmeter. Enter the measured RMS
Voltage in the empty field “[ ] V rms” and click “Set Cal.” button. The calibration of the Output
level is now done.
Note (soundcard): Keep the volume setting on your amplifier, and use the
Output Level setting in “Edit that” to set the output voltage (Vrms).
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1.2 SPL Loopback calibration
Select “2 – SPL Loopback” at the upper right of the window. This is a full range response and level
calibration of the SPL.
Connect Output to Microphone Input with the special loopback cable (see the figure below) and click
‘Test’ button. Soundcard: use output from amplifier to Input1/L. Keep the input sensitivity about horizontal
(lower left on UA-25xx) and avoid overload. Increase microphone/input sensitivity later if needed.
After the recommended calibration and response correction is displayed, click “Set Cal.” button. Now
the SPL loopback calibration is finished.
Soundcard: Keep this volume setting on your amplifier, if you want to keep the SPL calibration. Otherwise
just repeat the SPL Loopback calibration.
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1.3 Impedance (Z) calibration using FINELab hardware
Select “3 – Z Loopback” at the upper right of the window. This is the full range response and level
calibration of the impedance.
FINE(Lab) - Do the following steps to calibrate the impedance: (See Soundcard version on next page)
1. Take a 4 ohms 5W resistor ( or closest available)
2. Measure the resistor with an accurate Low Ohms Digital Multimeter. The value should have
two decimals, e.g. 4.31 ohms.
3. Connect the resistor to the Output; shown in the figure below (You may include your cables to
make a more accurate calibration). Enter the measured resistor value in the empty field
“[ ] Ohms” and click “Test” button.
4. After the recommended calibration and response correction are displayed, click “Set Cal.”
button. The calibration is finished.
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1.4 Impedance (Z) Calibration using soundcard
1. Take a 4 ohms 5W resistor ( or closest available)
2. Measure the resistor with an accurate Low Ohms Digital Multimeter, preferably with two
decimals, e.g. 4.31 ohms. Or use the given value.
3. Replace the loudspeaker, shown in the figure below, with the (4 ohms) resistor. Connect the
two cable leads across the (0.10 ohms) series resistor as shown in the diagram. This cable
should be connected to the right input (2/R) using XLR connector.
4. Turn the right channel input Attenuator (Sens.) fully down as indicated ___. Enter the
measured resistor value from 2) in the empty field “[ ] Ohms” and click “Test” button. (Mon SW
should NOT be active – no red light).
5. After the recommended calibration and response correction are displayed, click “Set Cal.”
button. The calibration is finished. Note: You can measure both SPL and Impedance
simultaneously with a two channel soundcard (UA-25xx)
Note: You can measure both SPL and Impedance simultaneously with a two-channel
soundcard (UA-25xx)
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1.5 Microphone calibration
A). Calibration using microphone data:
The microphone sensitivity can be found from the LOUDSOFT microphone Calibration Sheet
supplied with the microphone.
Enter the microphone sensitivity value in the empty field “[ ] dB re 1V/Pa”, and click “Set Cal.”
button. Now the calibration is done.
Note using Soundcard: This calibration (A and B) is only valid if the SPL
Loopback was done with the current volume (gain) setting of the amplifier.
B). Calibration using a microphone calibrator:
This is the most accurate method. Place the microphone on the calibrator using an adaptor. (See the
attached sketch showing an adaptor for the LOUDSOFT FL1 microphone.)
Switch on the calibrator and hold the microphone firmly (the sound from the calibrator is then barely
heard).
Press the test button and the measured microphone sensitivity is displayed.
Press the “Set Cal.” button to use this. The microphone calibrator must give 1 Pa (94 dB SPL).
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1.6 Adapter for LOUDSOFT FL1 microphone
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2. FINELab HARDWARE (Box)
2.1 Front panel
1. USB Blue LED
When FINELab is connected to the computer with a USB cable, the blue USB light LED is on.
2. Microphone input
Phantom power (48 V) is provided for XLR type connections, allowing you to connect a condenser
microphone that requires phantom power.
NB: REMEMBER TO SET THE REAR PHANTOM 48V SWITCH TO ON! (SEE PAGE 9)
3. Amplifier output - Speakon connector
You can use the Speakon connector to connect a loudspeaker.
Speakon rear connections
4. Amplifier output - Banana connector
Or, you can use the banana connectors to connect a loudspeaker.
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2.2 Rear panel
1. Power Input jack: 15 V DC
2. 48 V Phantom Power Switch on/off button: Must be on with the LOUDSOFT FL1
Condenser Microphone.
3. USB connector: Use a USB cable to connect the FINELab hardware (Box) to your computer.
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