Spectra V610 Operation Manual Download Page 4

 

The V610 Quick Start Guide 

 

 

 
 
 
 
 
 
 
 
Input Level Control (Threshold)  

 
PROPER SETUP OF THIS CONTROL WILL ALLOW FOR CONSISTENT AND REPEATABLE PERFORMANCE 
 
The V610 compressor circuit is designed to operate levels of -40dBu or greater. The input level control allows for 2dB, incremented 
adjustment to attain -40dBu level. As gain is increased beyond the -40dBu input level, resulting compression follows incrementally. 
The amount of input level compression may be readily viewed on the V610. A separate LED gain reduction meter simultaneously 
shows gain reduction. In gain reduction mode, the meter will deflect top to bottom, thus indicating the amount of gain reduction, in 
dBu. Adjusting the input level will give a visual demonstration as to the relation of input gain versus gain reduction.  
Note: Three, 10dB pad ranges allows for up to 30dB input pad. The line input has an additional 20dB of input pad.  
 
The V610 is capable of signal levels 30dBu above the -40dBu input reference level, (-10dBu). Levels beyond this reference standard 
may be easily attenuated with the input level control.   

 
Independent Peak Limiting/Compression

 

 
A unique and important design feature of the V610 is to eliminate the "peak" transient information independent of the compression 
function. Audio program peaks, as defined by Spectra Sonics over four decades ago, operate at frequencies well beyond 20 kilohertz 
and contain no music program material. Conversely, conventional analog peak limiter circuits that operate in the 20-kilohertz range 
will affect program material content in terms of frequency response, distortion and headroom. 
In addition, the compression function on conventional analog compressors will be determined by peak content. The greater the 
peak/average ratio, the greater the compression and loss of dynamic range and increase in system noise. 

The V610 eliminates the peaks and allows for improved dynamic range and system noise by increased compressor gain.

 

 
 
Peak Limiting Only

 

 
For maximum dynamic range, and no compression, this configuration is required: 
-Set the input level whereby the "threshold" LED occasionally flashes. The "threshold" LED should not be illuminated on a constant 
basis. This setting indicates at peaks only. The "threshold" circuit is like no other in the industry and operates an extremely high 
frequency similar to an oscilloscope. 

 
 
 
 
 
 
 

Summary of Contents for V610

Page 1: ...1 Model V610 Operation Manual Contact Information 860 West Riverdale Road Suite D6 Riverdale UT 84405 801 605 8849 9 00 AM 5 00 PM MST WWW SPECTRA1964 COM...

Page 2: ...scernable as beyond the state of the art Because of extremely low noise characteristics of the design the system has a very low input level threshold of 40 dBu thus providing the greatest input sensit...

Page 3: ...o 30 dB compression with release time such that attack and release does not occur on successive peaks of the lowest frequency utilized Typically less than 5 100ths of 1 Compression Limiting Ratio Cont...

Page 4: ...control Independent Peak Limiting Compression A unique and important design feature of the V610 is to eliminate the peak transient information independent of the compression function Audio program pea...

Page 5: ...stands the relationship between input level gain and output level make up gain Improper level adjustment can result in loss of dynamic range and possibly increased system distortion The V610 Complimit...

Page 6: ...to 100 1 When the slope control is set for minimum compression the knob is set at 10 thus providing peak limiting and linear amplification of 20dBu When the slope is set for maximum compression the k...

Page 7: ...mpression only 5 Limiting and compression with additional fixed amplitude protection maximum percent modulation Through variations of these separate and distinct modes of operation innumerable audio s...

Page 8: ...s the compression curve and a continuously variable limiting curve is obtainable For positive amplitude protection a flat compression slope provides a flat limiting protection line Control Settings In...

Page 9: ...imiting Broadcast Application This mode is the same as the previous Compression and Limiting Simultaneously mode except that additional amplitude protection at a fixed level is provided by driving the...

Page 10: ...ess or de emphasis controls frequencies irrespective of whether or not transients or sibilant peaks are present The professional audio engineer is no longer in control of the final program output fro...

Page 11: ...ting fully counterclockwise the compression limiting curve is flat Hence the maximum amplitude output is held to a constant 20 dBu for any input level up to 30 dB above threshold This extremely flat s...

Page 12: ...r multiple source program material main program channel material mastering or very slow music from a single source Minimum settings of release time 0 on the panel fully counterclockwise will quickly r...

Page 13: ...evel changes Judicious listening and selection of release times for various program selections is recommended using this information as a guide Threshold Attack Indicator LED The Vu meter needle mecha...

Page 14: ...nents EQUIPMENT WARRANTY The following warranty is effective for all Spectra Sonics LLC Manufacturer products Spectra Sonics warrants that this product is free of defects in both materials and workman...

Page 15: ...such notice the Manufacturer will give instructions respecting the shipment of product or such other matters as it elects to honor this warranty as above provided This warranty does not cover damage...

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