Alpine PXI-H990 owner manual 27-EN, Concrete examples

Page 31

4 Divide the distances calculated for the different speakers by the speed of sound (343 m/s temperature 20°C).

This value is the time correction value for the different speakers.

•The speed of sound fluctuates according to the temperature. The accurate speed of sound

can be achieved with the formula shown below. Speed of sound = 331.45 + C ⋅ T

C: 0.607

T:Temperature (°C)

•Concrete examples

1.Calculating the time correction value for the front left speaker on the diagram below.

Conditions:

Distance between farthest speaker and listening position: 2.25 m (88-3/4")

Distance between front left speaker and listening position: 0.5 m (20")

Calculation: L = 2.25 m (88-3/4") – 0.5 m (20") = 1.75 m (68-3/4") Compensation time = 1.75 ⎟ 343 ⋅ 1000 = 5.1 (ms)

In other words, setting the time correction value for the front left speaker to 5.1 (ms) sets a virtual distance matching the distance to the farthest speaker.

5.1ms 0.5m

2.25m

The sound is uneven because the distance between the listening position and the different speakers is different.

The difference in the distance between the front left and rear right speakers is 1.75 meters (68-3/4").

Time correction eliminates the difference between the time required for the sound from the different speakers to reach the listening position.

Setting the time correction of the front left speaker to 5.1 ms makes it possible to coordinate the distance from the listening position to the speaker.

Continued

27-EN

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Contents PXI-H990 Page PXI-H990 Page Contents Limited Warranty Do not Disassemble or Alter Installation Location TemperatureMaintenance Operating the PXI-H990 Basic OperationAdjusting the acoustic image BI Phantom Using This ManualSetting the speakers SP Select Turning the power on and offSetting the speakers SP Select Currently set SystemTW L OFF 10-ENTitle 11-EN12-EN Preparations for automatic adjustments13-EN Preparations for automatic adjustments Hints on using the Road Equalizer function14-EN 15-EN Using the Road Equalizer function16-EN Using the Road Equalizer functionExternal MIC External Microphone 17-ENExternal MIC Selecting the MicrophoneStart 18-ENMeasuring the Frequency Response Inside the Vehicle Turning Road Equalizer On and Off 19-EN20-EN Selecting the ModeMODE1 21-EN 22-EN ENT 23-ENMemory 24-ENRelated 25-EN26-EN Performing time correction manually Time CorrectionConcrete examples 27-ENPerforming time correction manually Time Correction 28-EN29-EN 30-EN When L+R is selected00ms 31-EN32-EN Equalizer adjustments33-EN 34-EN Equalizer adjustmentsFreq 20HZ Graphic Equalizer AdjustmentsAdjustable frequencies 35-EN36-EN Graphic Equalizer AdjustmentsBand Parametric Equalizer AdjustmentsAdjustable bands 37-EN38-EN Parametric Equalizer AdjustmentsLV 0 dB 39-EN40-EN Crossover network41-EN 42-EN Crossover adjustment/Switching the phase43-EN 44-EN Crossover adjustment/Switching the phase15Press Select Level Level Phase14Press Adjust the slope, then Press 2 ENT 45-EN46-EN 47-EN MX settings48-EN MX settings49-EN MX1 50-EN51-EN 52-EN Adjustment procedure53-EN Speaker setup Dolby SPSet, then press 2 ENT Speaker setup Dolby SP54-EN PressOFF 55-EN56-EN Cut-off frequency setting57-EN Adjusting the speaker levels Output Level58-EN Adjusting the speaker levels Output Level59-EN 60-EN Adjusting the acoustic image BI Phantom61-EN 62-EN 63-EN 64-EN Freq 315Hz 65-EN66-EN Mixing bass sound to the rear channel Rear MIX67-EN Mixing bass sound to the rear channel Rear MIX 68-EN69-EN 70-EN Rear FIL on 71-EN72-EN Achieving powerful high volume soundSTD 73-EN74-EN Adjusting the DVD level DVD Level75-EN Adjusted, then press 2 ENTPress 1 or 76-EN Adjusting the DVD level DVD Level77-EN Channel Settings 6.1CH Mode78-EN Channel Settings 6.1CH Mode79-EN 80-EN PCM Output Settings PCM OUT Mode81-EN 82-EN PCM Output Settings PCM OUT ModeLevel When PL II Music is selectedCenter width adjustment Center Width 83-EN84-EN Front and rear level difference adjustment DIM ControlPanorama on 85-ENTo emphasize the surround effect Panorama 86-EN When Neo6 Music is selectedLevel 0 87-ENOutput Level 88-ENSplit 89-ENMode 90-EN91-EN External input settings92-EN External input settingsAUX-AP on 93-EN Storing settings in the memory94-EN Storing settings in the memory95-EN Easily storing the adjusted/set contents in the memoryStore P1 96-EN Calling out stored valuesRecall P1 97-ENEasily calling out values in the memory 98-ENCalling out stored values 99-EN Equalizer adjustment when DVI-9990/TMI- M990 is connectedLevel Graphic EQ adjustmentEqualizer adjustment when DVI-9990/TMI-M990 is connected 100-EN101-EN 102-EN Parametric EQ adjustment103-EN 104-EN About the Monitor Display EX DVD Video mode105-EN 106-EN TerminologyDolby Digital EX 107-ENDTS Neo6 108-EN Case of difficulty109-EN SpecificationsComponents Parts name Quantity SpecificationsDimensions 110-EN111-EN Directory MenuLimited Warranty
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PXI-H990 specifications

The Alpine PXI-H990 is a state-of-the-art embedded computing platform designed to meet the demanding requirements of modern testing and measurement applications. As part of the PXI (PCI eXtensions for Instrumentation) standard, the PXI-H990 incorporates modularity, high-performance, and scalability, making it an ideal solution for engineers and researchers in various industries including telecommunications, aerospace, and automotive.

One of the standout features of the Alpine PXI-H990 is its powerful processing capabilities. It utilizes a multi-core processor architecture that ensures efficient data handling and processing, crucial for real-time applications. The device supports high-speed data acquisition, helping engineers achieve accurate measurements and reduce testing time.

The PXI-H990 comes equipped with flexible I/O options that allow users to customize the platform according to specific application needs. Its slots support a wide range of modules, including those for signal generation, analysis, and data logging. This versatility ensures that systems can be tailored for diverse tasks without the need for extensive hardware changes.

The architecture of the PXI-H990 allows for high-speed communications between modules, enabled by the PXI backplane. This interconnectivity facilitates synchronized operation, enhancing timing accuracy, which is especially important in applications such as radar and communication systems testing. Furthermore, the device’s built-in synchronization capabilities allow for precise control over multiple instruments and measurements.

On the connectivity front, the PXI-H990 supports various interfaces, including USB, Ethernet, and Serial. This ensures seamless integration with other equipment and facilitates easy data transfer. The device also comes with advanced software support, enabling users to leverage powerful programming environments for automation, scripting, and analysis.

Additionally, the Alpine PXI-H990 is designed with durability and reliability in mind. It features rugged construction, ensuring it can withstand challenging operational environments. This reliability is further enhanced by built-in cooling systems that maintain optimal operating temperatures, even during intensive data processing tasks.

In conclusion, the Alpine PXI-H990 stands out for its combination of high performance, modularity, and flexibility. Its advanced processing capabilities, extensive I/O options, and robust architecture make it a leading choice for engineers and organizations looking for reliable embedded solutions in testing and measurement applications.
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