Extron electronics SSP 200 User Manual page 51

Use PCS to set speaker delays, using either of the following methods.
Two Person Setup
NOTE: Setting up speaker delays is easier with two people. If only one person is
available, the position of the ears of the listener must be marked precisely. A pile of
boxes could be used to ensure that the distances are consistently measured to the
correct height. Do not try to guess ear positions, as this introduces measurement
errors.
1. Pick an ideal central location where all speaker output signals converge.
2. Use a tape measure to measure the distance from each speaker to the convergence
location. Be sure to measure to the same spot from each speaker.
NOTE: Measurements from the speaker must be to the midrange driver in a three‑way
speaker or from halfway between the tweeter and the woofer in a two‑way speaker.
Measurements to the convergence location must be at ear height.
3. In the Unit of Measure box, click the Feet (ft) or Meters (m) radio button to
select the units and enter the Speaker Distance values for each speaker in the boxes.
The up and down arrows increase the distance in increments corresponding to steps of
0.1 ms (0.12 feet or 0.03 meters). The software automatically determines the farthest
speaker and calculates the delay time (in milliseconds) for each speaker.
These values are shown in the Calculated Delay box. The current values are shown
in blue, changes (yet to be saved) are shown in orange.
4. After all of the speakers have their measurement entered, the Apply button appears.
Click the button to save the changes. The new values (previously in orange) are shown
in blue as the current values and there are no values displayed in orange.
To retain the original values, click Cancel instead of Apply.
Setup with a Real Time Analyzer (RTA) calibration tool
1. Choose an ideal central location on which all speaker output signals converge.
2. Place the microphone from the RTA at ear level in the convergence location.
Select Active Input on the Test & Output Trim tab (see
3.
page).
4. Play the audio source. This can be an analog source, provided by the RTA.
Use the Test Signal Output buttons in the Test & Output Trim tab to select
5.
which speakers are tested and the order in which the speakers are tested.
6. Use the RTA to measure the speaker distance (in ms) for each channel.
In the Unit of Measure box on the Speaker Delay tab, select the Milliseconds
7.
(ms) radio button and enter the values for each speaker (in ms) into the boxes. The up
and down arrows increase the distance in increments of 0.1 ms.
These values are shown in the Calculated Delay box. The current values are shown
in blue, changes (yet to be saved) are shown in orange.
8. Repeat steps 5 through 7 until the speaker distance has been entered for all available
speakers.
NOTE: The maximum allowable distance for the furthest speaker is 700 ms
9. Click Apply. New values are shown as the current values, in blue. No values are
displayed in orange.
To retain the original values, click Cancel instead of Apply.
figure 39
SSP 200 • Product Configuration Software
on the next
43