USER'S MANUAL
Contents
1. and higher Expander Gate THRESHOLD settings work best for downward expansion whereas higher RATIO settings clockwise towards MAX work best for gating If a setting produces unde sirable pumping readjust the Expander Gate RATIO or THRESHOLD setting LACY 12 INPUT Jacks CHANNEL one and two use 1 4 phone plugs or male XLR plugs to connect these inputs to your source The s ystem s INPUT jacks accept either balanced or unbalanced signals Input impedance is 13 Unplug this device during lightning storms or when not used for long periods of time gt 40kQ 14 Refer all servicing to qualified service personnel Servicing is required when the unit has 13 OUTPUT Jacks CHANNEL one and two been damaged in any way such as power supply cord or plug is damaged liquid has b The OUTPUT jacks accept 1 4 balanced or unbalanced phone plugs or female XLR plugs een spilled or objects have fallen into the device the unit has been exposed to rain or Maximum output signal level is gt 20dBu In the 4dBu setting the balanced output imped moisture does not operate normally or has been dropped ance is 100Q and the unbalanced output impedance is 50Q In the 10dBV setting the b alanced output impedance is 1kQand the unbalanced output impedance is 500Q 3 CONTROL ELEMENTS 14 OPERATING LEVEL Switch This switch selects between a 10dBV and 4dBu nominal operating level When the swi tch is in the IN position a 10dBV operating leve2. output of the system A setting of 2 1 indicates an input output ratio wherein a 2dB increase in signal above threshold will produce a 1 dB increase in output signal A setting of 1 indicates that an infinite increase in input level would be required to raise the output level by 1 dB Compressor ATTACK and RELEASE Control The ATTACK control sets the amount of time it takes the system to begin compressing a signal once the detector has sensed a signal above threshold The ATTACK range is from FAST for a tighter and more noticeable compression effect with very little overshoot to SLOW for more delayed gradual compression A very fast ATTACK setting will cause the system to act like a peak limiter even though RMS detection circuitry is used Slower AT TACK settings cause the system to act like an RMS or averaging detecting compressor I imiter The RELEASE control sets how fast the compression circuit returns the input to its origin al level The RELEASE rate is from FAST where compression follows the envelope of the program material very tightly to SLOW for very smooth compression There is no absolute right way to set the ATTACK and RELEASE controls However in general you will want them set slow enough to avoid pumping or breathing sounds cau sed when background sounds are audibly modulated by the dominant signal energy yet the release must be fast enough to avoid suppression of the desired signal after a sudden transient or lou
3. Attack Time compressor Expander Gate Release Time compressor Expander Gate Power Requirements DIMENSIONS WEIGHT TET 7 EED Scalable Program Dependent lt 100 usec Scalable Program Dependent Program Dependent 15watts 100VAC 50 60Hz 120VAC 60Hz 230 VAC 50 60Hz 485x146x44 5mm 2 3kg SERRE ERE 55 AE g B USER S MANUAL Please read this manual carefully and proper take care of this manual 1 IMPORTANT SAFETY INSTRUCTIONS CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN CAUTION To reduce the risk of electric shock do not remove the top cover or the rear section No user serviceable parts inside refer servicing to qualified personnel WARNING To reduce the risk of fire or electric shock do not expose this appliance to rain and moisture This symbol wherever it appears alerts you to the presence of uninsulated dangerous voltage inside the enclosure voltage that may be sufficient to constitute a risk of shock This symbol wherever it appears alerts you to important operating and maintenance instructions in the accompanying literature Please read the manual 2 DETAILED SAFETY INSTRUCTIONS 1 2 3 4 YS 5 Read these instructions Keep these instructions Heed all warnings Follow all instructions Do not use this device near water Clean only with a dry cloth Do not block any ventilation openings Install in accordance with the manufacturer s instru
4. ctions Do not install near any heat sources such as radiators heat registers stoves or other app aratus including amplifiers that produce heat Do not defeat the safety purpose of the polarized or grounding type plug A polarized plug has two blades with one wider than the other A grounding type plug has two blades and a third grounding prong The wide blade or the third prong are provided for your safety If the provided plug does not fit into your outlet consult an electrician for replacement of the ob solete outlet TET 1 ED 4 SPECIFICATIONS FREQUENCY RESPONSE Flat 20Hz 20kHz 0 0 5dB Bandwidth 0 35Hz 80kHz 0 3dB Input impedance 40k 2 Balancde unbalanced Max level 22dBu OUTPUT Impedance Balanced 4dBu Balanced 2002 Unbalanced 100 10dBV Balanced 1 5k Unbalanced 750 Max level 21dBu into 600 SIDE CHAIN INSERT Input Impedance gt 10k Output Impedance lt 2k Max level 21dBu Distortion Noise lt 0 2 any amount of compression at 1kHz Intermodulation Distortion 2 lt 0 2 SMPTE Noise lt 93dBu unweighted Dynamic Range gt 114dBu unweighted Crosstalk lt 93dB 1kHz Common Mode Rejection gt 40dB Any Frequency Stereo Coupling True RMS Power Summing Threshold Characteristics Selectable OverEasy or hand knee Exp Gate Program Dependent Threshold Compressor 40 to 20dB Expander Gate 60 to 10dB Ratio Compressor 1 1 to 1 Expander Gate 1 1
5. d note has decayed For low frequency tones e g Bass guitar set REL EASE and ATTACK to 2 00 or slower Auto Switch This switch overrides both the ATTACK and RELEASE controls and enables preset progr am dependent attack and release times These times are derived from the input signal and continuously change to match its dynamics Enabling this AUTO Function duplicates the classic dbx sound of the system s forerunners which have become standards in the ind ustry Qs
6. l is selected When it is in the OUT posi tion a 4dBu operating level is selected Note that the switch is slightly recessed This is 6 i o 2 1 to provide protection against accidental activation possibly causing damage to other sys ono THRESHOLD Se enon a tem components due to a sudden change in gain ONE ee O E 06000000 15 SIDECHAIN INSERT Jack Eo GONO OF O 50 on This jack accepts 1 4 TRS phone plugs and provides a connection to the system detec CO a oy fue E n A ASS tor path The RING acts as a Send carrying a buffered version of te signal present at the 10 11 7 8 9 system INPUT jack at an impedance of 2k2 The TIP acts as a Return for equipment to feed the system s detector circuitry such as an equalizer for de essing or frequency sen sitive gating compression You can also drive the system Sidechain input with the output of most equipment by using a 1 4 mono phone plug Input Impedance is greater than 10ka SIDECHAIN INSERT Tiegeut meut RIN uT a 3 14 a D 15 16 POWER INPUT SWITCH AND FUSE Power is supplied via an IEC standard 3 pin connector The power supply fuse is located in a fuse holder fitted into the rear panel Always replace with the correct type and rating of fuse as indicated adjacent to the fuse holder Qs Qs 1 STEREO COUPLE Switch and LED This switch sets the system Stereo or D
7. mits extremely smooth natural sounding compres TET 3 ED Sion without artifacts due to the gradual change of compression around the threshold W ith OverEasy compression input signals begin to gradually activate the system internal g ain change circuitry as they approach the THRESHOLD reference level They do not get fully processed by the RATIO ATTACK and RELEASE controls until they have passed so mewhat above the THRESHOLD reference level As the signal level passes the THRESHO LD level processing increases until it is fully processed to the extent determined by the c ontrol settings In hard knee mode the system can provide abrupt compression effects as well as hardli miting applications Note that when in hard knee mode the yellow LED will not light as the input signal passes across the threshold The signal is either being compressed over thr eshold or it is not being compressed under threshold Compressor RATIO control Adjust this control to set the amount of compression applited to the input signal Clockw ise rotation of this control increases the compression ratio from 1 1 no compression up to 1 where the compressor can be considered to be a peak limiter especially with f aster ATTACK settings When an input is above the THRESHOLD seting reference level the RATIO setting dete rmines the number of decibels by which the input signal must increase in level to produce a 1 dB increase in the signal level at the
8. ng effects After you adjust the controls for the desired amount of comp ression set the OUTPUT GAIN to add the same amount of gain that is shown on the GAIN REDUCTION meters For example if the average amount of gain reduction shown on the meters is 10dB then setting the OUTPUT GAIN control to 10dB will compensate for the 10dB average level reduction at the output 5 OVEREASY Switch Depress this switch to select the OverEasy compression characteristic The yellow THRE SHOLD LED turns on when the signal is in the OverEasy region When the switch is out the operates as a hard knee compressor and the yellow LED does not light 6 Compressor THRESHOLD Control and LEDs BELOW OVEREASY ABOVE Adjust this control to set the threshold of compression from 40dB to 20dB In hardknee mode The threshold of compression is defined as the point above which the output level no longer changes on a 1 1 basis with changes in the input level In OverEasy mode the threshold of compression is defined as the middle of the OverEasy threshold region that is half way into compression The three THRESHOLD LEDs indicate the relationship of the input signal level to the thr eshold of compression The green LED lights when the signal is BELOW threshold the r ed LED light when the signal is above threshold and the yellow LED lights when the VO EREASY switch is depressed and the input signal is in the OVEREASY range The sysytm OverEasy compression per
9. to 4 1 nQ 10 Expander Gate THRESHOLD Control and LEDs BELOW ABOVE 10 Protect the power cord from being walked on or pinched particularly at plugs extension Adjusting this control sets the level at which the gate will open and allow the signal at the cords and the point at which they exit the unit input to pass through to the output Turning the knob fully counterclockwise to OFF allo ws the gate to pass all signals unattenuated effectively bypassing the gate Turning the k 11 Only use attachments accessories specified by the manufacturer nob fully clockwise causes the gate to attenuate input signals below 15dBu The depth of attenuation depends on the setting of the Expander Gate RATIO control 12 Use only with the cart stand tripod bracket or table specified by the manufacturer or sold with the device When a cart is used use caution when moving the cart device The two Expander Gate LEDs indicate the relationship of the input signal level to the thr combination to avoid injury from stumbling over it eshold setting The red LED lights when the signal is BELOW threshold the green LED I ights when the signal is ABOVE threshold 11 Expander Gate RATIO control This control sets the amount of attenuation applide to the input signal once it is below the threshold from gentle downward expansion appropriate for mixed program vocals etc to a hard gating effect which can be useful for percussion Fairly low RATIO
10. ual Mono operation Press the STEREO COUPLE switch in for stereo operation where Channel one becomes the master controller for both channels All of channel two s controls switches and LEDs will be disabled except for C hannel two s GAIN REDUCTION meter since Channel two is the slave With the STEREO COUPLE switch out the unit functions as two separate mono compressor gates each w ith its own independent controls 2 BYPASS Switch and LED Press this switch in to bypass the front panel controls effectively canceling the function a nd processing effect of the compression gating and gain settings The input signal is still present at the system output but is now unaltered by the controls BYPASS is especially useful for making comparisons between processed and unprocessed signals Note that w ith stereo operation STEREO COUPLE switch pressed in the CHANNEL one BYBPASS switch controls both channels 3 GAIN REDUCTION dB Meter This meter displays the amount of signal attenuated from the input signal by the compre ssor or Expander Gate When the compressor and Expader gate are both active the m eter displays the maximum amoutnt of gain reduction for whichever function is greater Compressor or Expander Gate 4 OUTPUT GAIN dB Control This control sets the overall gain of the system from 20dB to 20dB The OUTPUT GAIN control is especially useful to compensate for the RMS level decrease which results from dynamic processi
Download Pdf Manuals
Related Search