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571

571 SPL Computer

User

s Guide

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Summary of Contents for 571 SPl

Page 1: ...571 571 SPL Computer User s Guide...

Page 2: ...l including photocopying scanning recording or by any information storage and retrieval system without permission in writing from Symetrix Inc 571 6408 216th St SW Mountlake Terrace WA 98043 USA Tel 4...

Page 3: ...ndicator flashes use the LEVEL SET MAX control to set the sound system s maximum operating level The SPL computer puts those settings into memory along with their respective SPL s then returns the uni...

Page 4: ...kes one to two seconds Any signal applied to the paging inputs during this time immediately terminates the sense period If a silent period never occurs the 572 forces one A front panel control determi...

Page 5: ...ower cord is essential for safe operation Grounding The chassis of this product is grounded through the grounding conductor of the power cord To avoid electric shock plug the power cord into a properl...

Page 6: ...m level If the ambient noise level is too high during calibration the overall control range may be inadequate For additional information refer to Appendix B During calibration run normal program signa...

Page 7: ...NE Settings Set the controls and switches on the front and rear panel as shown in Table 3 2 Table 3 2 Front and rear panel control and switch settings Front Panel Control Setting Rear Panel Connection...

Page 8: ...e unit goes into BYPASS mode The 571 delivers unity gain when the output is operated unbalanced and the gain is 6 dB when the balanced output is used Calibration Procedure 1 Press the MODE switch once...

Page 9: ...r a larger gain change than the ambient level 1 2 OUTPUT GAIN TRIM control Providesmanualadjustmentofoveralloutputgainovera20dB range at any time This control may be remotely located which disables th...

Page 10: ...r paging only set this switch to the in position For systems that are used for both music and paging set this switch to the out position SENSE MIC 2 Low impedance balancedinputforthe 2sensingmicrophon...

Page 11: ...the controls as they are changed and stays in the appropriate calibration mode for about 8 seconds after the last change is made This allows the installer time to reset operating levels as necessary W...

Page 12: ...ce is masked by a nearby noise source for instance placing the sensing microphone s near the constant noise of the kiddie play area in a shopping mall Tips To Remember Calibration must occur at a quie...

Page 13: ...does not predispose them to only this usage After all 1 4 inch jacks are sometimes used for loudspeakers which are anything but high impedance Therefore the presence of 3 pin XLR connectors should not...

Page 14: ...he connections for each type of connector Input and Output Connections Appendix C illustrates how to connect the 571 to various balanced and unbalanced sources To operate the 571 s balanced line input...

Page 15: ...raps must be removed Connect a 50 kilo ohm linear taper potentiometer pot wired as shown on the back panel and in Figure 6 1 Up to 250 feet of 2 conductor shielded cable may be used Be sure to connect...

Page 16: ...s the signals at both the music and page inputs Paging signals duck the music signal by the amount determined by setting of the PAGE OVER MUSIC control Use this format when the 571 is the mixer for mu...

Page 17: ...re signals present on either page input The PAGE OVER MUSIC control determines the amount of ducker action The format switch defeats the music input and selects the source for the 571 s program level...

Page 18: ...eases in level then you are probably having problems with misinformation in the audio that is reaching the sense mics In this case you may need to perform a modification to prevent the 571 from respon...

Page 19: ...m into the sensing mics In casinos be sure to place the sensing mikes up high where they hear an average of the crowd and the slot machines Use longer averaging times Restaurants Bars Theme Stores All...

Page 20: ...r than fully counter clockwise 1 2 sec the unit does not respondimmediately Unit does not increase gain sufficiently at highambientlevels You may be overloading the sense mic preamps Insert 15 dB pad...

Page 21: ...ntain a running average of those measurements for a minimum of 1 2 seconds to a maximum of 5 minutes before using that average to compute gain adjustments The device shall provide inputs for paging si...

Page 22: ...urpose or merchantability Symetrix s warranty obligation and buyer s remedies hereunder are SOLELY and exclusively as stated herein This Symetrix product is designed and manufactured for use in profes...

Page 23: ...collect shipments Just do these five things and repairs made in warranty will cost you only one way freight charges We ll prepay the return surface freight If you choose to send us your product in so...

Page 24: ...on is complete remove the pad Assuming that the 571 were operating at a ratio of 1 1 the gain would go up 25 dB when the pad was removed Conversely the gain would as a result be able to go down 25 dB...

Page 25: ...571S are exactly like those to the 571 except that in the case of stereo operation they are normally from and to the other channel If paging is used connect the paging line level feed to both the mast...

Page 26: ...ROM BALANCED OUT FEMALE XLR PIN 1 GROUND PIN 2 HIGH PIN 3 LOW MALE XLR PIN 1 GROUND PIN 2 HIGH PIN 3 LOW MALE TS PLUG TIP HIGH SLEEVE GROUND LOW MALE TRS PLUG TIP HIGH RING LOW SLEEVE GROUND MALE TRS...

Page 27: ...50081 1 Electromagnetic compatibility Generic emission standard Part 1 Residential commercial and light industry EN 50082 1 Electromagnetic compatibility Generic immunity standard Part 1 Residential...

Page 28: ...571 26 Symetrix Inc 6408 216th St SW Mountlake Terrace WA 98043 USA Tel 425 778 7728 Fax 425 778 7727 Website http www symetrixaudio com Email symetrix symetrixaudio com...

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