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Total Audio Control COMPRESSOR ONE 500 Series, Assembly And User'S Manual

The Total Audio Control COMPRESSOR ONE 500 Series is a versatile audio compressor designed for precision control of audio levels. Complete with an Assembly and User's Manual for easy installation and operation. Download the manual for free from manualshive.com to optimize your audio experience.

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LD068 GR METER and LD069 AUDIO METER CARD ASSEMBLIES

                             

 

 

 

 

 

 

Summary of Contents for COMPRESSOR ONE 500 Series

Page 1: ...ASSEMBLY USER MANUAL 500 Series Suite 5 Fairfield 1048 Govan Road Glasgow G51 4XS United Kingdom info totalaudiocontrol com www totalaudiocontrol com...

Page 2: ...ly well performing digital multimeter with semiconductor testing capability or a capacitance meter can be picked up from e bay for the cost of literally a burger meal Therefore investing into a few ha...

Page 3: ...ld be able to get in and out of a solder node within few seconds Safety first be extremely careful when trimming component leads as these can easily fly off into your face Always hold the lead with on...

Page 4: ...4 BLOCK DIAGRAM...

Page 5: ...d by jumpers Optional Sidechain and Dry path insert points Hard Soft switch Feed forward Feedback switch L switch providing Sidechain Listen facility or multichannel linking Master LED illuminated whe...

Page 6: ...level 6dB This is also the level at unbalanced insert points 6 IMPEDANCES Input impedance balanced 24k ohms Output impedance balanced 75 ohms Unbalanced SIDECHAIN insert input impedance 50k ohms Unbal...

Page 7: ...7 ASSEMBLY...

Page 8: ...8 LDO66 MAIN BOARD...

Page 9: ...9 LDO66 MAIN BOARD WITH COMPONENT VALUES...

Page 10: ...RD ASSEMBLY Solder the 3 pin right angle header to the LD046 card The plastic spacer should butt up against the PCB and the header should sit well aligned Solder the potentiometer Also make sure that...

Page 11: ...11...

Page 12: ...12...

Page 13: ...13...

Page 14: ...14...

Page 15: ...15...

Page 16: ...16 Fit the Left Hand Side screen plate...

Page 17: ...17 LDO67 SWITCH SUB BOARD...

Page 18: ...18 LDO67 SWITCH SUB BOARD WITH COMPONENT VALUES...

Page 19: ...19...

Page 20: ...20 LD068 GR METER and LD069 AUDIO METER CARD ASSEMBLIES...

Page 21: ...21...

Page 22: ...22...

Page 23: ...6 and P17 2 way pin headers Slide off the plastic spacers These to be interference fit for chassis connection 2 Solder the middle switch first and then the other two switches Trim the excess pins 3 So...

Page 24: ...24...

Page 25: ...25...

Page 26: ...26...

Page 27: ...27...

Page 28: ...28 Fit jumpers to SUB1 1 2 3 4 6 7 8 9 and P5 J8 as shown above Jumper positions are also shown on the silk screen DO NOT FIT ANY OTHER JUMPERS UNTIL INSTRUCTED OTHERWISE...

Page 29: ...29 FRONT PANEL CONTROLS...

Page 30: ...lso active in A1 or A2 Recovery mode Toggle switch in R position potentiometer control of 75mS to 3S A1 50ms 5S A2 100mS 2S Provides control of 0 to Limit 10 1 Provides make up gain of 6dB to 18dB Pro...

Page 31: ...off of 6dB octave Slope and turnover points are nominal THE DEFAULT SETTING IS WITH THE JUMPER ACROSS PINS 1 2 F2 applies a band pass filter which focuses the compressor s detection circuit entirely...

Page 32: ...STEN In LISTEN mode when the compressor is switched IN the L switch replaces the normal main output with the audio signal present at the input to the RMS detector This allows monitoring of the sidecha...

Page 33: ...33 TESTING SINGLE MONO MODULE WITH LISTEN DEFAULT OPERATION...

Page 34: ...o shown below PLEASE NOTE P1 LINK JUMPER IS ONLY FITTED FOR MASTER SLAVE OPERATION AND ONLY WHEN USED ON TOTAL AUDIO CONTROL RACKS IT MUST NOT BE FITTED FOR ANY OTHER MODE OF OPERATION AND OR ON THIRD...

Page 35: ...35...

Page 36: ...e IN OUT switch set to OUT pass a 10dBu 1kHz signal The AUDIO meter should indicate 10dBu for INPUT or OUTPUT and there should be no reading when the source is selected to SIDECHAIN The GAIN REDUCTION...

Page 37: ...AIN REDUCTION meter should illuminate 9 With an input of 0dB verify the GAIN MAKEUP calibrations when fully CCW and CW 6dB and 18dB Also verify the 0 point is correct Component tolerances may affect t...

Page 38: ...14 V 15 8V 15 92V TP15 WET 0V 0 56mV TP16 DRY 0V 0 55mV TP17 VCA_OUT2 0V 1 72mV TP18 Audio Meter SIG PRESENT 77mV 79 6mV TP19 Audio Meter 0dB 540mV 544 1mV TP20 Audio Meter 18dBu 4 0V 4 0V TP21 GR Met...

Page 39: ...127 45mV dB Therefore to achieve 30dB limiting with a 20dBu input signal this would need in a control voltage of 50 x 127 45 6 372V Set the input signal to 20dBu Set the THRESHOLD CONTROL to 30dB full...

Page 40: ...immed values will drift in time Therefore you may wish to leave it untrimmed Alternatively you may wish to install the optional LD043 VCA card containing THAT 2180 VCA which does not require trimming...

Page 41: ...asurements Hanning works great too although it is a compromise between dynamic range and frequency selectivity Hamming might hide too much of the sought after sideband frequencies 3rd octave mode does...

Page 42: ...0dBu to the input of COMPRESSOR ONE Now adjust VR9 labelled SYM until the harmonics start to disappear If you adjust VR9 further they will start to appear back again Just make them disappear so that o...

Page 43: ...oggle switches to left PIN EXPECTED NOMINAL VOLTS MEASURED U1 1 7 0 500mV 0 58mV 498mV U2 1 7 250mV 0 233mV 3 81mV U3 5 0 0 6mV U4 1 8 0 0 0 61mV 1 54mV U5 1 7 0 0 1 66mV 6 67mV U6 1 7 0 0 11 25mV 1 5...

Page 44: ...ERT point Check all jumpers are correctly set and necessary connections are made Connect P4 pins 1 2 to bypass insert point 3 If TP29 does not track TP5 TP6 suspect Q1 Q1 improves the opamp drive capa...

Page 45: ...45 MULTICHANNEL OPERATION...

Page 46: ...r LINK two adjacent modules for multichannel operation or can function as a SIDECHAIN LISTEN switch There are four basic modes of operation Listen Norm Master and Slave In addition to these there are...

Page 47: ...Forward Feed Back switch must be in the same position for ALL linked modules for correct operation Pressing the L switch connects the RMS detector capacitor to any other identical compressor using the...

Page 48: ...V OFF 0 530 0 530 0 530 60 0 704 0 714 0 705 50 0 774 0 782 0 775 40 0 840 0 846 0 839 30 0 903 0 908 0 902 20 0 966 0 970 0 963 10 1 028 1 031 1 025 0 1 090 1 093 1 087 10 1 152 1 155 1 149 20 1 215...

Page 49: ...bined control signal for all the THAT4301s in the system ONLY CONNECT ONE MODULE IN A GROUP AS A MASTER OTHERWISE DAMAGE WILL OCCUR 4 SLAVE This connects the RMS detector averaging circuit to any othe...

Page 50: ...ividually controlled on each slave Multiple slaves may be set up In practice it is unlikely that more than 7 would be required ONLY CONNECT ONE MODULE IN A GROUP AS A MASTER OTHERWISE DAMAGE WILL OCCU...

Page 51: ...ere are slight variations with frequency at the low end 1 234V at 10Hz and 1 24V at 20Hz The Master bus is the send from the master module appears on pin 6A as LINK_MASTER This only applies to TAC mot...

Page 52: ...F this puts a low impedance on the bus and crosstalk onto it is not going to have adverse effects Similarly when the LINK_MASTER bus is in use it will always be sourced from a low impedance When neith...

Page 53: ...bus system only the NORMAL NORM mode of COMPRESSOR ONE can be used for multichannel linking PIN 6 on the solder side left side of the COMPRESSOR ONE module corresponds to the API 500 rack specificati...

Page 54: ...the MASTER bus must always be wired in the same manner by using J9 B and J10 B pins Do not twist these wires they may be loosely tied They do not need screening but should be kept as short as possible...

Page 55: ...des the LINK_MS connection These backplane buses may additionally be linked by a rear panel LINK switch Viewed from the rear of the rack 3 way double pole toggle switch fitted Switch to the right No l...

Page 56: ...56 SIDE CHAIN INSERT CONNECTIONS...

Page 57: ...57 PIN 7 and PIN 9 on the edge connector are unbalanced RETURN and SEND respectively These are labelled as W2 and W3 on the card edge connection fingers...

Page 58: ...e with COMPRESSOR ONE 3 FOR USE IN A TOTAL AUDIO CONTROL RACK WITH BALANCED INSERT POINTS Fit wire jumpers to W2 and W3 Total Audio Control rack will be fitted with LD050 Balancing Card 4 FOR USE IN A...

Page 59: ...sert connections Again this type of connection is not compatible with COMPRESSOR ONE side chain insert points and will not work However it might be possible to achieve unbalanced connections Otherwise...

Page 60: ...60 Insert connections to Total Audio Control INSERT ONE module...

Page 61: ...P3 DRY PATH INSERT POINT P3 is fitted if no DRY PATH INSERT is available This connects the DRY PATH INSERT SEND to INSERT RETURN bypassing any external connection If there is any form of dry path ins...

Page 62: ...62 OPTIONAL LD043 VCA CARD...

Page 63: ...ntains the RMS detector Symmetry TRIM control VR9 to the VCA for distortion trimming will be disabled as it is no longer required Do not fit jumpers to P5 J8 Plug in the LD043 VCA card and secure it u...

Page 64: ...64...

Page 65: ...65 OPTIONAL LD047 HARD BYPASS CARD...

Page 66: ...loading signal path loading is determined by the preceding and following devices which could result in a mismatch or clicks Audio metering of the signal path on the Compressor will not be displayed Sm...

Page 67: ...67...

Page 68: ...68 Total Audio Control...

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