13
The delay time will be determined by alternately sending a short tone burst out of the main and auxiliary
loudspeaker systems and measuring the time each tone burst takes to travel to the microphone.
• Make sure that the amplifier and auxiliary loudspeaker system installation is operable by testing the system with
the delay bypassed.
• Place a test microphone on a stand at the listening position closest to the auxiliary loudspeaker system. (Best
results are achieved when a Sanctuary Series PVM™22 dynamic microphone is used; however, any standard dynamic
mic or a condenser mic that will operate on +15 volts phantom power will be suitable.) Position the mic so that
it will pick up signals from both the main and auxiliary loudspeaker systems. Connect the microphone to the TEST
MIC Input (21) on the rear of the amplifier.
• Connect the TEST REFERENCE OUTPUT (22) on the rear of the amplifier to a console input on the main sound
system. Turn the channel input gain and channel fader all the way down on the console. Additionally, turn the delayed
channel level control on the SA-4200™ all the way down.
• Set the DELAY Switch (20) for the appropriate channel to ACTIVE.
• Set the INPUT SELECT Switch (16) to select the appropriate channel for delay adjustment (C or D).
• Set the DELAY MODE Switch (17) to TEST.
• Adjust the gain on the main system’s mix console so that the tone burst is heard at a moderate level in the
room.
• Adjust the SA-4200 amplifier channel level control on the auxiliary channel to be delayed (C or D) so that the
volume of the tone burst in the auxiliary loudspeaker system is similar in level to the tone burst of the main system
at the microphone. (This is not a critical adjustment.)
• Adjust the delay time using the AUTO DELAY ADJUST Control (18) on the rear of the amplifier for the proper
delay as indicated by the green OK LED. If the SHORT LED is lit, turn the control clockwise to increase the delay.
If the LONG LED is lit, turn the control counterclockwise to decrease the delay.
• Pressing the AUTO DELAY ADJUST Control (18) will automatically set the delay time. The green OK LED should
illuminate.
• When the setup is complete, return the INPUT SELECT Switch (16) to LOCK and the DELAY MODE Switch
(17) to NORM.
NOTE:
The delay time is actually set slightly longer than synchronous to allow for the Haas Precedence Effect. In order
to better identify the LED that is lit in a dark rack, the “off” LEDs glow dimly.
Delay Measurement Fault Conditions
• If the unit senses that the microphone is not connected or operable, then the lower SHORT LED will flash
continuously.
• If the microphone does not sense the tone from both loudspeaker systems, then the green OK LED with flash
continuously.
• If the required delay time is greater than the available delay memory (about 100 ms), then the top LONG LED
will flash continuously.
NOTE:
One of the above fault condition messages may occasionally display during testing. This may be caused by room
noise and can be ignored.
AUTO DELAY™ SETUP PROCEDURE
Содержание SA 4200
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