User manual XTANT A1540 TECHNICAL DATA REPORT

[. . . ] [. . . ] A1540 OPERATION The A1540 is a one band parametric equalizer Adjustments are made using the three circuit board mounted potentiometers These controls are simple to operate and provide a wide range of adjustment FREQUENCY CONTROL is used to select the center frequency for equalization A clockwise rotation increases frequency while a counterclockwise rotation decreases frequency FREQUENCY MODULE: The supplied frequency modules divide the audible frequency range into three bands The range of the modules are: Hz to Hz Hz to kHz and kHz to kHz Simply install one of the modules and its frequencies are selectable via the FREQUENCY CONTROL " Q " A D J U S T M E N T : "Q" is the property of an equalizer that determines the range of frequencies affected on either side of the cen ter frequency "Q" is equal to the center frequency divided by the bandwidth As "Q" goes up bandwidth decreases The A1540's "Q" adjustment ranges from a narrow bandwidth of to a very broad bandwidth of A clockwise rotation increases "Q" while a coun terclockwise rotation decreases "Q" BOOST/CUT: This control is used to boost or cut the level of the center frequency dB of cut at Its adjustment ranges from dB of full counterclockwise rotation to boost at full clockwise rotation Flat response ( dB ­ no cut or boost) occurs at mid rotation when the slot on the control is in the horizontal position 7676 South 46th Street · Phoenix, AZ 85040 602. 449. 8268 · Xtant. com # NDM132 Owner's Manual ­ A1540 1 Band Parametric Equalizer INSTALLING THE A1540 STEP 1: Locating the Connectors A Remove the A1540 from the packaging and inspect the circuit board B Locate the header connectors soldered onto the top and bottom of the circuit board See illustration C Notice that one of the openings on both header connectors is blocked by white filler material The A1540's mounting system utilizes this blocked receptacle as the "key" to insure proper positioning when installing the A1540 onto the amplifier's mounting port See illustration and D During the "tuning process" the A1540 may be installed "vertically" using the right angle header connector See illustration However the final mounting position must be in a "horizontal" position (using the header connector on the bottom of the circuit board) to allow the cover to be re attached See illustration INSTALLING THE A1540 STEP 2: Adjusting the A1540 The A1540 is designed to be adjusted with the aid of a Real Time Spectrum Analyzer The analyzer will provide visual feedback when following this simple procedure A Plug in one of the supplied frequency modules into the A1540's module socket It is from this module's range of frequencies that you will select your center frequency B Turn off amplifier Remove amplifier cover and locate the Accessory Port C Remove the two header jumpers and locate the missing pin ("key") on the port D Align the blocked receptacle on the right angle header connector with the missing pin and press the A1540 onto the mounting port Note: after adjusting you must follow Step for final installation E Set system to a moderate volume level and play pink noise F Rotate the boost/cut control clockwise (fully) to dB The RTA's display will now show you the position of the center frequency and "Q" settings of the A1540 FREQMODULE SOCKET INSTALLING THE A1540 STEP 3: Final Installation of the A1540 illustration STAND OFF MOUNTING HOLE illustration BOOST/CUT "Q" FREQUENCY A Turn off amplifier Remove A1540 from its "vertical" mounting position See Step B Align the white stand off with the hole on the rear of the A1540 circuit board Next align the blocked receptacle with the missing pin on the mounting port Press the A1540 onto the port and secure it to the stand off by applying down ward pressure C Turn amp on and audition the system If further adjustment is necessary the A1540 may be adjusted when mounted in this final mounting position VERTICAL HEADER ACCESSORY PORT illustration BOTTOM OF A1540 CIRCUIT BOARD LOCATING HEADER CONNECTOR TOP OF A1540 CIRCUIT BOARD "KEY" RIGHT ANGLE HEADER CONNECTOR G Rotate the frequency control to the frequency you wish to adjust H Next rotate the "Q" control to the width of the dip or peak in response that you are equalizing I Finally adjust the gain control to achieve the desired response curve [. . . ] [. . . ]