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Summary of Contents for 363X

Page 1: ...MODEL 363X a I Noise Gate Service Manual Preliminary...

Page 2: ...symbol wherever it appears alerts you to important operating and maintenance instructions in the accompanying literature Read the manual Manufactured under one or more of the following U S patents 3...

Page 3: ...ing the mixdown inputs to the two track as an economical solution to automat ion In live sound applications the 363X can be used to gate signal processing gear that produce hum such as synthesizers sa...

Page 4: ...Channel 2 have no effect on the gating action The Channel 2 OPEN HOLD and RELEASE LEDs track with Channel 1 meters B THRESHOLD control and OPEN LED CH 1 and CH 2 Adjusting this control sets the level...

Page 5: ...ns open after the input sig nal falls below the threshold The HOLD con trol is calibrated in seconds with a range of 0 OFF to 3 seconds When the HOLD function is used the yellow HOLD LED turns on as s...

Page 6: ...OR switch CH 1 and CH 2 Depressing this switch allows the signal at the KEY input to be routed directly to the audio output When KEY MONITOR is selected all of the front panel functions are inactive e...

Page 7: ...2 The signal output of the 363X is unbalanced and is capable of driving 18dBu into a 6000 load It requires a WTip Sleeve phone plug C KEY Input CHI and CH 2 The KEY input is unbalanced and can accept...

Page 8: ...ave a power switch It is recommended that the363X be ON at all times The Model 363X consumes a maximum of 12 watts AC power WARNING Be sure to verify both your actual line voltage and the voltage for...

Page 9: ...ples include mixing consoles musical instruments patch bays and signal proces sors A Mixing Board If you wish to gate a particular track of a multi track recording or one channel of a live per formanc...

Page 10: ...mp if so equipped or the output of some other device that is designed to accept low level instrument inputs including various stomp boxes rack mount audio products and the dbx Performer Series process...

Page 11: ...nt C Sound reinforcement Placing the 363X in series with the main mix output is a cost effect means of eliminating hum and buzz from the house speakers Simply set the threshold level low enough to all...

Page 12: ...ent means of suppressing feedback into the monitors when the microphone is not being used Normally feedback is not a problem into the house speakers however there are in stances when these cabinets ar...

Page 13: ...Channel 2 will track ac curately In Figure 8 the 363X is switched to the stereo couple mode and inserted into the signal path between the mix outputs of the console and the inputs of the 2 track mixdo...

Page 14: ...justed to accentuate the frequencies that will control the gating action The P out put of the equalizer is then fed to the Key Input of the 363X When the microphone receives audio the 363X wiU open an...

Page 15: ...Basic Operation Control Descriptions Figure 10 Front Panel 14...

Page 16: ...hresh old level and quickly extinguishes when the sig nal falls under the threshold This LED can also serve as a signal present indicator when trouble shooting through your system C HOLD control I The...

Page 17: ...ms 300dB S 330ms lOOdB S 900ms 30dB S 3 Sec lOdB S 9 Sec F RELEASE LED The red LED labelled RELEASE illuminates with growing intensity as the attenuation level increases This serves as a dynamic indic...

Page 18: ...h only that particular drum will trigger the gate However if the threshold level is set to high the natural dynamics of the drum can be lost Inserting an equalizer into the KEY in put on the 363X will...

Page 19: ...revious section titled Connecting the 363X to Your System This section will address each of the controls and indicators on the dbx 363X In order to successfully operate the 363X it should be understoo...

Page 20: ...LD control set around 3 sec onds and the RELEASE control set around lOdB S the 363X will allow lower signals to open the gate while the long hold and release settings will allow the gate to remain ope...

Page 21: ...eed 113 F 45 C when equipment is powered Mounting ears and a blank half panel for a sin gle unit are provided Two 363X units may be mounted side by side in one rack space In addition all dbx half rack...

Page 22: ...al 1 i B Loosely attach the adaptor piece to the other side of the 363X using two more pan head Phillips screws and a Phillips screwdriver See note above NOTE Your 363X assembly kit includes the tools...

Page 23: ...alling Two 363X Units joiner assembly joiner joiner side pieces reinforcing plate rack ears V32 Allen wrench Phillips screwdriver not included pan head Phillips screws flat head countersink screws NOT...

Page 24: ...ting E Place the Left and Right units on a flat sur face rear facing so the joiner side pieces are approximately 2 apart Take the joiner as sembly and loosen the thumbscrew so the sliding catches clea...

Page 25: ...M SOURCE DEVICE TO 363X TO 363X adjoi n K PHONO PLUG TO MONO PHONE PLUG NC XL TYPE FEMALE PN 2 HOT FEMALE XL TYPE TO MONO PHONE PLUG Figure 16 Input Connections Connect Audio Inputs The 363X has an ac...

Page 26: ...363X TO NEXT DEVICE Pit QrrrfF 3t 9 COWECT IF NEEDED TO REDUCE HUM XL TYPE MALE PIN 3 HOT MONO PHONE PLUG TO MALE XL TYPE TO NEXT DEVICE l CONNECT f NEEDED TO REDUCE HUM XL TYPE MALE PM 3 HOT MONO PHO...

Page 27: ...dbx Professional Products or Telex 17 1480 a division of AKG Acoustics Inc 1525 Alvarado Street San Leandro CA 94577 USA Factory Service Always contact Customer Service before returning a product to...

Page 28: ...tkn t nLU n t 1 nnn L 1 C nr r finish then pack it enough packing toj r _ reinforced fiberglass or polyester sealing tape L t I 7 o r v uwu IU piuicv 1 nil in the carton with at least 1 5 inches 3 75...

Page 29: ...ce Unbalanced lOkQ Maximum Audio Input Level 18dBu Audio Input Connector Type Vi Phone Jack Output Characteristics Output Source Impedance Unbalanced 2212 Phone Minimum Load Impedance Greater than or...

Page 30: ...Coupling Internal Front Panel Switch dbx 363X j i General Power Line Requirements 90 j 120VAC 50 60Hz Switchable to 240VAC Power Consumption 7W Dimensions 1 75 H x 8 5 W x 7 25 D i Rack Space 1 Rack...

Page 31: ...Repeat for Channel 2 using TP17 and R76 C VCA Symmetry 1 Set all front panel switches to the OUT position 2 Connect a tone burst oscillator to the Channel 1 KEY INPUT and press the Channel 1 KEY ENGA...

Page 32: ...Center the front panel THRESHOLD knobs 4 Turn the front panel HOLD and RELEASE knobs fully clockwise 5 Verify that the Channel 1 green OPEN LED is on the Channel 2 red RELEASE LED is on and all other...

Page 33: ...en the button is IN and is off when the button is OUT H THRESHOLD calibration 1 Connect a 1 kHz sine wave at 25 dBv 0 1 dB 76 6 78 4 mV rms to the Channel 1 input 2 Turn the Channel l THRESHOLD knob f...

Page 34: ...n OPEN LED is on 5 Measure the Channel 1 output level and verify that it is 1 volt rms 0 3 dB see step D 6 Measure the output level at 20 Hz 200 Hz 5 kHz and 20 kHz 7 Verify that the output level for...

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