Focus Measurement
When the calibration is OK, press Enter to start the measuring process and ‘Measuring Focus position …’ will be displayed. Each measurement comprises four steps:
•A low and a high frequency measuring signal first in the left and then in the right channel.
The length of each measurement depends on a combination of the measurement volume, set in the calibration process, and the background noise in your local environment. Typical measuring times for the low and high frequency measuring signals are 25 and 5 seconds, respectively.
You can exit a commenced measurement by clapping close to the microphone.
Do not sit in the listening position during focus measurements.
The measurement will stop prematurely if an error occurs during the measuring process. In this case, an error message is displayed. Press Enter to continue and ‘Retry focus measurement – press Enter’ is displayed.
If the error needs correcting this should be done at this point (see RoomPerfect™ troubleshooting), thereafter press Enter to retry the measurement. The measurement procedure will start again.
A measurement has ended successfully when the last measuring signal stops and the display shows a RoomKnowledge rating, as ‘RoomKnowledge XX% - Measurement ok’. Press Enter to continue.
Room Measurements
The number of room positions needed depends on the value of RoomKnowledge, if it is below 90% after the third measurement the guide automatically includes extra room measurements until a RoomKnowl- edge of 90% or more has been achieved.
The remaining measurements are to be placed in random positions in the room with random orienta- tions of the microphone. Choosing these random or arbitrary positions and orientations is easy. All you have to do is place the microphone at different positions in the room and with different orientations. It is important to perform well spaced measurements to get a covering image of the acoustical properties in the room, i.e. varying positions, heights and orientations of the microphone.
For an optimal room correction it is very important that the measurements are:
1.performed more than 1 meter (approx. 3 feet) away from the loudspeakers,
2.not performed behind the loudspeaker, and
3.that there is at least 50 cm/1.5 ft between each measurement.
3.
50
cm
2. |
Not behind |
loudspeaker |
1. |
1m |
19
