User manual XTANT A1544A TECHNICAL DATA REPORT

[. . . ] "Q " i s equal t o t he cent er f r equency di vi ded by t he bandw i dt h. The A1544A's "Q" adjustment ranges from a narrow bandwidth of 10 to a very broad bandwidth of 1. The rotary potentiometer provides continuously variable adjustment. MODES OF OPERATION: ( C I R C L E I N P U T M O D E: B A L A N C E D L I N E: N O I S E G A T E: 4 CHANNEL 2 CHANNEL ENABLE ON DISABLE DEFEAT IT IS IMPORTANT THAT YOU RETAIN THIS LOG FOR YOUR RECORDS. [. . . ] ON P A G E 8 O F T H E OWNER'S MA N U A L, Y O U W I L L F I N D T H E OWNER'S REFERENCE LOG. ONCE Y O U H A V E N O T A T E D T H E F I N A L SETTINGS F O R T H I S P 5 0 0 , T R A N S F E R THOSE SETTINGS T O T H E OWNER'S REFERENCE LOG. IN T H E F U T U R E, A N Y SYSTEM E X P A N S I O N A N D / O R PROBLEMS M A Y B E REFERENCED T O T H I S LOG. A1544A ADJUSTMENTS ( DRAW POSITION O F CONTROL & front "a" front "b" front "c" INSTALLATION CIRCLE FREQ. RANGE SELECTED) SEQUENCE rear "a" rear "b" REMOVE A1544A COVER: Loosen allen head screws and lift-off cover. Do not remove p r o t e c t i v e c o v e r i n g o n s t a i n l e s s s t e e l l i d u n t i l i n s t a l l at ion i s com pl et e. TEMPORARILY MOUNT A1544A: FREQ. FREQ. FREQ. FREQ. FREQ. The A1544A is designed to be anchored through the four (4) holes located on the circuit board/base assembly. MARK WIRES FOR TERMINATION AND REMOVE A1544A: A1544A TUNING SEQUENCE The A1544A i s desi gned t o be "set - up" or "t uned" w i t h t he ai d of a R e a l T i m e S p e c t r u m A n a l y z e r m e a s u r i n g a p i n k n o i s e s i gnal generated by the mobile audio system. The analyzer provides visual feedback when following the steps listed below. Turn the system off and place each of the frequency range jumpers into their corresponding "frequency range" positions. P e r f o r m t h e f o l l o w i n g s t e p s p e r b a n d: With the system playing pink noise, turn on the RTA and adjust pink noise SPL to 85 ­ 90 dB. This will show the present center frequency and "Q" settings on the analyzer. IF MORE INPUT GAIN IS DESIRED, MOVE THE JUMPER TO A HIGHER "+" SETTING. TO ACHIEVE LOWER GAIN, MOVE THE JUMPER TO ONE OF THE "­" POSITIONS. THE A1544A IS SHIPPED WITH THE F/R INPUT SENSITIVITY SET AT +10 dB. 2CH / 4CH INPUT MODE JUMPER: THE POSI- Front "A" FREQ FREQ Front "B" FREQ Front "C" FREQ Rear "A" FREQ Rear "B" SETTING THE E TION OF THE POTENTIO ROTATION DECREASES THE USE OF AN RTA, P ENCE ­ KEEP IN MIND ATED VALUES PICTU STRONGLY SUGGESTS Center FREQUENC "Q" "Q" "Q" "Q" "Q" 2 3 FREQUENCY VALUE IS A 1000 DEPENDING UPON = X 10, FREQ JUMPER 2 "Q" 1 FULL BOOST/CUT BOOST/CUT BOOST/CUT BOOST/CUT BOOST/CUT 1. 1 1. 6 COUNTER CLOCKWIS ROTATION PRODUCES A "Q +20 dB +10 dB 0 dB ­10 dB ­20 dB = = = = = 100 ­ 300 mV 300mV ­ 1V 1V ­ 3V 3V ­ 8V 10V ­ 17V BALANCED LINE: XTANT'S BALANCED LINE TECHNOLOGY MAY BE USED TO ELIMINATE INDUCED AND/OR GROUND-LOOP RELATED NOISE, RECEIVE SIGNAL FROM A BALANCED SOURCE, INTERFACE WITH A HIGH LEVEL SIGNAL (SPEAKER OUTPUTS) AND/OR BE USED AS AN OEM SOURCE UNIT INTERFACE. EACH SET OF INPUTS (FRONT/REAR) OF THE A1544A FEATURE BALANCED LINE CIRCUITRY. TO ACTIVATE THIS CIRCUITRY, SIMPLY MOVE THE BALANCED LINE JUMPER TO THE "ENGAGE" POSITION. TO USE BALANCED LINE IN THE 2 CHANNEL MODE, ONLY "ENGAGE" THE FRONT INPUTS. GENERALLY, THE BENEFITS DERIVED FROM BALANCED INPUTS ARE AVAILABLE AT THE OUTPUTS. FREQUENCY RANGE JUMPER: EACH BAND OF EQUALIZATION HAS A FREQUENCY RANGE JUMPER WHICH DETERMINES THE RANGE OF CENTER FREQUENCIES AVAILABLE FOR ADJUSTMENT. THREE RANGES ARE AVAILABLE: 20 TO 200 HZ, 200 TO 2, 000 HZ AND 2, 000 TO BYPASS JUMPERS: THESE JUMPERS ARE USED TO COMPARE SIGNAL BEFORE AN AFTER EQUALIZATION. [. . . ] THREE RANGES ARE AVAILABLE: 20 TO 200 HZ, 200 TO 2, 000 HZ AND 2, 000 TO BYPASS JUMPERS: THESE JUMPERS ARE USED TO COMPARE SIGNAL BEFORE AN AFTER EQUALIZATION. IN 4CH MODE, THE FRONT AND REAR EQ BANDS MAY BE BYPASSED INDEPENDENTLY. IN THE 2CH MODE, ONLY THE JUMPER LABELED REAR/2CH IS USED TO BYPASS. INPUT SENSITIVITY ADJUSTMENT FRONT INPUT REAR INPUT BOOST/CUT 2 / 4 CH INPUT MODE 4 CHANNEL FRONT BYPASS EQ REAR /2 CH BYPASS EQ FREQUENCY RANGE JUMPER POSITIONS -18dB -10dB -6dB 2 CHANNEL POWER ON LED +20 dB +10 dB 0 dB ­10 dB ­20 dB ENABLE BALANCED LINE INPUTS DISABLE ENABLE DISABLE ENABLE 2K TO 20 KHZ 200 TO 2 KHZ 20 TO 200 HZ Full counter clockwi clockwise rotation p THRESHOLD ADJUST THRESHOLD LED INDICATOR NOISE GATE DISABLE The A1544A can be powered by a Radio Shack® AC Adapter # 273 1653B (12VDC/1000MA) 1 AMP FUSE FRONT INPUT LEFT RIGHT REAR INPUT LEFT RIGHT FRONT OUTPUT LEFT RIGHT REAR OUTPUT LEFT RIGHT REMOTE CHASSIS +12V 20, 000 HZ. [. . . ]