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OPERATING MANUAL

BALANCING, DISTRIBUTION AND MATCHING AMPLIFIER

Содержание SAM-1C

Страница 1: ...OPERATING MANUAL BALANCING DISTRIBUTION AND MATCHING AMPLIFIER...

Страница 2: ...7 CONFIGURATION EXAMPLES page 8 12 HUM LOOPS page 13 BLOCK DIAGRAM INPUT OUTPUT MODULES page 14 AMPLIFIER MODULES SSOM 04Mc SSIM 04Mc page 15 16 AUDIO SIGNAL QUALITY page 17 18 LEVEL ADJUSTMENT page...

Страница 3: ...s such as radiators or hot air outlets or in places subject to a lot of dust mechanical vibrations or shocks FOR CONDENSATION ACCUMULATION If the unit is moved immediately from a cold to a warm place...

Страница 4: ...al becomes asymmetrical 4 an asymmetrical signal becomes symmetrical 5 2 balanced signals can be summed mixed stereo mono 6 hum loops between unbalanced units can be eliminated 7 switch on or switch o...

Страница 5: ...s interfering with the balanced line are almost completely eliminated The prerequisite for the exceptionally high common mode rejection or symmetry of the amplifiers used is our laser trimmed precisio...

Страница 6: ...rox 18 dBu when the jumpers are closed Jumpers 8 11 allow summation or distribution of the input signals within the module Circuit zero and chassis are separated from each other in the SAM 1C Pin 1 of...

Страница 7: ...eans 4 balancing amplifier channels and 0 differential amplifier the V between the digits means the balancing channels are internally configured as distribution amplifiers The configuration of the inp...

Страница 8: ...XLR Distribution amplifier In principle up to 4 amplifier channels 2 modules can be installed in the SAM 1C Combinations of distribution or summing amplifier configurations and additional individual m...

Страница 9: ...unbalanced audio signal sources to balanced inputs Two independent amplifier channels are realised by using a balancing amplifier module SSOM 04Mc The gain of each output can be adjusted separately i...

Страница 10: ...n also be achieved with jumpers J4 and J5 Signal flow SAM 1C 4 0 2 stereo output modules SSOM 04Mc as balancing amplifier 2 3 7 2 channel summing amplifier fully balanced This version allows the conne...

Страница 11: ...nfluence on other outputs In addition an unbalanced signal can be taken from the RCA sockets However long cables should not be connected here as the capacity of the cables connected here can also have...

Страница 12: ...M 04Mc of the SAM 1C can also be configured internally as mono distribution amplifiers 1 unbalanced RCA input to 4 balanced XLR outputs In this case the input signals are applied in parallel to the in...

Страница 13: ...etween and input If now the output of the transmitting device is modulated with an audio signal of 1 V there will be a difference of 1 V at the balanced input of the SAM 1C as well Consequently this a...

Страница 14: ...___________________________________________________________________________ Block diagram Audio 2 channel module SSIM 04Mc balanced XLR inputs to unbalanced RCA outputs Block diagram Audio 2 channel m...

Страница 15: ...utput right channel unbalanced J7 Control Power Down Mute Pin 7 NC 8 Not connected J8 Stereo mono mode L J8 A stereo A B mono Pin 8 Power supply 12 0 20 0 Volt J9 Stereo mono mode R J9 A stereo A B mo...

Страница 16: ...idge J7 closed Pin 6 Input right channel asymmetrical J8 close when used outside SAM 1C Mute Relais Pin 7 NC 8 Not connected J9 close when used outside SAM 1C Mute Relais Pin 8 Power supply 20 0 Volt...

Страница 17: ...was driven by square wave signals from a fast pulse generator Test signal Fig 1 1 kHz at a level of approx 1 5V RMS corresponds to 6 dBu line level at a usual load resistor of 10 k The wide frequency...

Страница 18: ...he 2nd 9th harmonic are less than 0 03 Good CD players have distortions of more than 100 times at this level The minimum is in the order of 0 00005 or 126 dB below useful signal at input signals of 6...

Страница 19: ...cies as an RF shield on the other hand this way there is no ground loop for the mains frequency and its harmonics This means that the SAM 1C works properly even when touching other metal housings with...

Страница 20: ...pply When the power supply is switched on it is gently boosted to full supply voltage in approx 0 2 seconds Switching on the power supply does not cause any crackling noise on the mains side or in oth...

Страница 21: ...al connector on each board the corresponding module can be removed In the case of the right hand module the protective earth connection attached to the front from the inside must also be loosened 8 3...

Страница 22: ...ess otherwise specified The configuration of the analyzer is indicated in the left block in each case Feed via cinch socket measured at the XLR output Analyzer R S UPL Frequency response 10 Hz 110 kHz...

Страница 23: ...tion amplifier Analyzer R S UPL Balancing amplifier SSOM 04Mc Difference Instrument Amplifier SSIM 04Mc THD k2 k9 above levels of 40 dBu 24 dBu SSOM 04Mc THD k2 k9 above levels of 40 dBu 24 dBu SSIM 0...

Страница 24: ...nd 0 0 dB gain unless otherwise stated The configuration of the analyzer is indicated in the left block Feed via XLR socket measured at the RCA output Analyzer R S UPL Frequency response 2 Hz 20 kHz S...

Страница 25: ...c range at 0 dB gain 136 5 dB CCIR468 eff unweighted 139 5 dB A weighting Output offset voltage 1 mV ___________________________________________________________________________________________________...

Страница 26: ...ropriate immunity of the unit However there is no absolute guarantee that no unauthorised electromagnetic interference will occur during operation of the unit In order to largely exclude the likelihoo...

Страница 27: ...her semiconductors are sensitive to electrostatic discharge ESD Improper handling of assemblies with such components during maintenance and repair can impair their technical properties or service life...

Страница 28: ...FERENTIAL AMPLIFIER SAM 1C complies with the following standards in accordance with the provisions of the EU directives and their supplements Security Protection class 1 EN60950 1992 A1 A2 1993 EMV EN...

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