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SDEC -X000 DACS Calibration Manual v1.0.doc 

 

9  Setting Output Level 

9.1  Setting Levels before Calibrating 

Using the internal noise generator of the SDP set all outputs to 
achieve 75dB using the “C” weighting and “SLOW” response. 
This will maintain the best signal to noise and headroom 
possible by optimizing the gain structure of the system. 

9.2  Final Level Set after Calibrating 

Setting the final output level should be done 

after

 all corrective 

EQ has been completed. It is very important that this be done 
so that all channels have a good balance and are properly 
calibrated for the average output in the mid-band frequencies. 
Use the internal noise test from the SDP and test one channel 
at a time. 
 

 

Set main and surround channels to 75db. 

 

Set the subwoofer channel to average between 82dB-
85dB. 

9.2.1 

Level Matching Multiple Surround 
and Subwoofer Channels

 

The SDEC-4000 has multiple outputs for Subwoofers and Side 
Surrounds. These will need to be level matched to each other 
before final output levels are set. 
1.  Using the internal noise test of the SDP test each output 

individually. It will be necessary to mute the output you are 
not testing. Make sure the 

Trim Link 

is off (not RED). 

2.  Once you have set each to the reference level of 75dB 

enable the 

Trim Link

 feature so that the led turns 

RED

.  

3.  With all the multiple channels un-muted test together and 

adjust the output to reach the same reference level. You 
will now have an output that has all the multiple channels 
level matched and the overall output set to the reference 
level. Follow the instructions for level matching the 
multiple surrounds and subwoofer channels first and then 
set the overall output level to the following reference level. 

9.3  Using the SPL Meter 

9.3.1 

Analog SLM Instructions

 

NOTE:

 All instruments of this type are most accurate when 

operated in the upper end of the selected range. You should 
always use the lowest 

RANGE 

setting possible. For example, if 

you are balancing a system using the Surround Processor's 
noise generator (75dB) you would set the 

RANGE 

selector to 

70dB

 
1.  Rotate the RANGE Selector clockwise one click to the 

BATTERY TEST position. Observe the meter indication. A 
reading anywhere within the red BATT TEST range 
indicates adequate battery power. If the indication is below 
this range, replace the battery before using the instrument. 

2.  Now rotate the RANGE Selector clockwise to the desired 

range. The meter has a display range from -10dB to +6dB. 
The 0dB point corresponds to the RANGE selected. 
Therefore, if the 80dB RANGE is selected, a 0dB reading 
will equal 80dB. 

3.  Slide the WEIGHTING Selector to "C" weighting for 

channel balance tests. "A" weighting cuts low frequencies. 
This will cause errors when measuring subwoofers. 

4.  It is recommended that you slide the RESPONSE Selector 

to the SLOW position. This slows the meters response to 
sudden changes in sound level which can make average 
level readings difficult. 

 

9.3.2 

Digital SLM Instructions

 

NOTE:

 All instruments of this type are most accurate when 

operated in the upper end of the selected range. You should 
always use the lowest 

RANGE 

setting possible. For example, if 

you are balancing a system using the Surround Processor's 
noise generator (75dB) you would set the 

RANGE 

selector to 

70dB

. In the event you have selected a range that is too low, 

an 

OVER-RANGE 

condition is indicated by a flashing display. 

Select the next higher range.  
 
1.  Turn the SLM on by rotating the 

RANGE Selector 

clockwise. Continue to rotate the 

RANGE Selector 

to the 

desired 

RANGE

2. 

Press the 

WEIGHTING 

button to select 

"C" 

weighting for 

channel balance tests.

 

3. 

It is recommended that you slide the 

RESPONSE 

Selector 

to the 

SLOW 

position. This slows the meters 

response to sudden changes in sound level which can 
make average level readings difficult.

 

4. 

Check the display for a low battery indication. If the battery 
needs replacing, 

BATT 

will appear in the upper left-hand 

corner of the LCD display. Replace the battery if 
necessary.

 

 

Содержание Synthesis SDEC-3000

Страница 1: ...SYNTHESIS SDEC 3000 SDEC 4000 DIGITAL EQUALIZER WITH DACS CALIBRATION CHECKLIST MANUAL...

Страница 2: ...onfiguration 11 6 3 ONLINE Mode 12 6 3 1 Speaker Configuration and Instructions 12 6 3 2 EQ Controls 13 6 3 3 Channel Delay Speaker Distance Offset Correction 14 6 3 4 Channel Output 15 6 3 5 Level Ma...

Страница 3: ...20 12 2 Recalling without a Saved File 20 12 3 Recalling from Network Device 20 13 Advanced Features 21 13 1 Cinema Music Subwoofer Output 21 13 1 1 RS232 Settings 21 13 1 2 Ethernet Settings 21 13 1...

Страница 4: ...ase call immediately and request shipping information Unless otherwise instructed always ship via UPS Blue When shipping always insure kit for 15 000 00 2 Equipment Required PC with windows XP Windows...

Страница 5: ...er distances to flat or 0 All bass management crossover points should be set to 80Hz Do not use 80Hz THX See the SDP processor installation manual Measure and input speaker offset correction page 9 fo...

Страница 6: ...s should operate before beginning the calibration The SDEC 4000P and SDEC 4000X need to be connected to each other via the Cobranet connection using a CAT5e crossover network cable and must be a minim...

Страница 7: ...o Amplifiers S4000IC Number Channel SDEC4000X S4000IC Number Channel SDEC4000X 9 Left Front Low A1 9 Left Front A1 10 Left Front Hi A2 10 N C A2 11 Right Front Low A3 11 Right Front A3 12 Right Front...

Страница 8: ...work Connection Plug router in to AC and make sure it is powered ON Begin with PC OFF SDEC UNPLUGGED no power Connect PC to Ethernet router and boot PC It should acquire a network address This can be...

Страница 9: ...e Java Remote panel Once you have opened the folder double click on the correct file for your hardware you will be prompted to enter the IP Address that appears on the front of the SDEC display Use th...

Страница 10: ...et node If you cannot see the Network control panel go to View Network If you cannot see the unit s you should first check all network settings and connections Please check the troubleshooting section...

Страница 11: ...the firmware needs to be updated check OK to proceed The unit may need to be rebooted The software will check to make sure the unit has the latest version automatically You will receive a message tha...

Страница 12: ...ntally Use the below diagram to help you navigate the system while using the DACS measurement system to calibrate your room 6 3 1 Speaker Configuration and Instructions Begin here by selecting the app...

Страница 13: ...the EQ settings can be accomplished simply by clicking inside the boxes and typing in your settings Any channel can be accessed by selecting from the channel list on the left Figure 12 Click on the c...

Страница 14: ...e to follow this procedure may result in incorrect settings being input in the EQ 1 Measure the distance from each speaker to the central or 1 microphone This should be the center of the listening are...

Страница 15: ...output levels are set 1 Using the internal noise test of the SDP test each output individually It will be necessary to mute the output you are not testing Make sure the Trim Link is off not RED 2 Once...

Страница 16: ...rate test result 8 1 Main Speakers Use the phase tester to confirm the following driver polarities of the L C R and subwoofers Synthesis Everest L C R UHF L C R Horns L C R Mid bass drivers Subwoofers...

Страница 17: ...nder to each channel for test On the front panel are two slide switches and a pulse indicating LED Slide the ON OFF switch to the ON position and the output selector to the LO position You should now...

Страница 18: ...d always use the lowest RANGE setting possible For example if you are balancing a system using the Surround Processor s noise generator 75dB you would set the RANGE selector to 70dB 1 Rotate the RANGE...

Страница 19: ...d REARS Simply mute the unused channel from within the London Architect Software It is best to test the Left Side and then the Right Side before testing the Left Rear and Right Rear channels Use the S...

Страница 20: ...need to recall settings as the settings will automatically be recalled Settings can be retrieved from a number of different ways Please read below for the different options The London Architect softw...

Страница 21: ...channels can be changed and are saved and recalled together Due to the advanced nature of this process it should only be done under the supervision of JBL Synthesis factory personnel 13 2 1 Saving Pr...

Страница 22: ...22 SDEC X000 DACS Calibration Manual v1 0 doc Figure 21 Figure 22 Figure 23...

Страница 23: ...ces to reconfigure Cannot save settings Cannot save while online Go offline first No Audio No Input Check connections Check pre amp or source Wrong Outputs Used Check connections Cobranet not connecte...

Страница 24: ...24 SDEC X000 DACS Calibration Manual v1 0 doc...

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