M166A — Active Summing Module

The M166A is a plug-in, PC card, module containing a active summing amplifier designed to combine a number of input sources to a common output while ma intaining extremely high isolation between the input circuits. In addition, the module permits the summing of all inputs in the balanced mode and without loss of signal level: FEATURES: Balanced configuration utilizing operational amplifiers 30 input summing capability to output Dual differential operational amplifiers produce a balanced input via solid tantalum capacitors.

Balanced IC amplifiers process the signal at the output +24dBm output capability is provided in order to realize maximum signal headroom throughout the system: Operating mode determined by con- ditional strapping on frame receptacle The M166A Active Summing Module is designed primarily for use within WBS audio console systems but will operate efficiently in any balanced system where multiple signal sources are required to be assigned in random or cumulative configuration to an output or mixer buss.

Greater than 9OdB isolation between inputs 20Hz to 20kHz Less than 25%THD at +24dBm output Exceptionally low noise

The M166A is a plug-in, PC card, module containing an active summing amplifier designed to combine a number of input sources to a common output while maintaining extremely high isolation between the input circuits_ In addition, the module permits the summing of all inputs in the balanced mode and without loss of signal level_ FEATURES: Balanced configuration utilizing operational amplifiers 30 input summing capability to 1 output Dual differential operational amplifiers produce balanced input via solid tantalum capacitors_ Balanced IC amplifiers process the signal at the output: +24dBm output capability is provided in order to realize maximum signal headroom throughout the system_ Operating mode determined by con- ditional strapping on frame receptacle The M166A Active Summing Module is designed primarily for use within WBS audio console systems but will operate efficiently in any balanced system where multiple signal sources are required to be assigned in random or cumulative configuration to an output or mixer buss_ Greater than 9OdB isolation between inputs 2OHz to 20kHz Less than 25%THD at +24dBm output Exceptionally low noise

CONFIGURATION 30 inputs to 1 output; totally balanced GAIN Unity +0.= 25 dB FREQUENCY RESPONSE +0.25dB 20Hz to 20kHz NOISE 80dBm absolute output noise TOTAL HARMONIC DISTORTION Less than 0.25% from 2OHz to 2OkHz (measured at +22dBm output level) SOURCE IMPEDANCE 600 ohms or less, balanced INPUT IMPEDANCE 20K ohms (with external summing resistors) INPUT LEVEL +24dBm maximum LOAD IMPEDANCE 600 ohms balanced OUTPUT IMPEDANCE 150 ohms resistive, balanced OUTPUT LEVEL +24dBm maximum INPUT ISOLATION Greater than 1OOdB IkHz PHASING Low terminal of input and low terminal of output are in phase _ POWER REQUI REMENTS 48V dc at 4OmA AMBIENT TEMPERATURE 00 to 60oC DIMENSIONS PC Card 52L x 3VW x 1D inches ACcESSORIES: WARD-BECK SYSTEMS LTD_ WARD-BECK SYSTEMS INC- 841 Progress Ave.Scarborough,Ont.

M1H 2x4 290 Larkin St:, Buffalo; New York 14210 Telephone: (416) 438-6550 Telex: 06-23469 WBS

CONFIGURATION 30 inputs to 1 output; totally balanced GAIN Unity +0.25 dB FREQUENCY RESPONSE +0.25dB 2OHz to 2OkHz NOISE 80dBm absolute output noise TOTAL HARMONIC DISTORTION Less than 0.25% from 2OHz to 2OkHz (measured at +22dBm output level) SOURCE IMPEDANCE 600 ohms or less, balanced INPUT IMPEDANCE 20K ohms (with external summing resistors) INPUT LEVEL +24dBm maximum LOAD IMPEDANCE 600 ohms balanced OUTPUT IMPEDANCE 150 ohms resistive, balanced OUTPUT LEVEL +24dBm maximum INPUT ISOLATION Greater than 1OOdB IkHz PHASING Low terminal of input and low terminal of output are in phase _ POWER REQUIREMENTS 48V dc at 4OmA AMBIENT TEMPERATURE 00 to 60oC DIMENSIONS PC Card 5YL x 3VW x 1D inches ACCESSORIES: WARD-BECK sySTEMS LTD_ WARD-BECK SYSTEMS INC- 841 Progress Ave.Scarborough,Ont: MH 2x4 290 Larkin St:, Buffalo, New York 14210 Telephone: (416) 438-6550 Telex: 06-23469 WBS

CONFIGURATION 30 inputs to output, totally balanced GAIN Unity +0.25 dB FREQUENCY RESPONSE +0.25dB 2OHz to 20kHz NOISE 8OdBm absolute output noise TOTAL HARMONIC DISTORTION Less than 0.25% from 2OHz to 20kHz (measured at +22dBm output level) SOURCE IMPEDANCE 600 ohms or less, balanced INPUT IMPEDANCE 20K ohms (with external summing resistors) INPUT LEVEL +24dBm maximum LOAD IMPEDANCE 600 ohms balanced OUTPUT IMPEDANCE 150 ohms resistive, balanced OUTPUT LEVEL +24dBm maximum INPUT ISOLATION Greater than 1OOdB IkHz PHASING Low terminal of input and low terminal of output are in phase.

POWER REQUIREMENTS 48V dc at 4OmA AMBIENT TEMPERATURE 00 to 60oC DIMENSI ONS PC Card 5YL x 3VW x ID inches ACCESSORIES: WARD-BECK SYSTEMS LTD_ WARD-BECK SYSTEMS INC 841 Progress Ave,Scarborough,Ont. M1H 2x4 290 Larkin St , Buffalo, New York 14210 Telephone: (416) 438-6550 Telex: 06-23469 WBS