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Operating Instructions Manual

Universal Audio 175 B, Operating Instructions Manual

The Universal Audio 175 B is a versatile audio interface renowned for its exceptional sound quality. Unlock its full potential by downloading the Operating Instructions Manual from our website for free. Gain valuable insights and step-by-step guidance to maximize your audio experience with the Universal Audio 175 B.

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UNIVERSAL AUDIO Model 175 B LIMITING AMPLIFIER

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Summary of Contents for 175 B

Page 1: ... FP electrolytic capacitors are used for ease of replacement The 175 B has a self contained power supply a VU meter that is switchable to indicate input or output level as well as gain reduction in dB and input and output attenuators graduated in 2 dB steps with vernier adjustments in excess of 2dB for each step The limiter is provided with input and output jacks on the front panel as well as a te...

Page 2: ...gram allows the remote VU meter to perform gain reduction while the internal meter is still usable to indicate input and output level ATTENUATORS The input and output attenuators are both adjustable from 0 to 40 dB For this reason the 175 B may be utilised at any point in the system where input signal level is between 24 dBm and 13 dBm The attenuators are adjusted for proper operating levels as fo...

Page 3: ...erial being used The following general suggestions are given for use of ATTACK and RELEASE adjustments a For vocal or narration program material with minimum low frequency information best results are usually obtained by adjusting for very fast attack and release times b The release time should be lengthened as the low frequency content of the program material increase c The attack time should be ...

Page 4: ... observed on the meter g Adjust first the PLATE BALANCE and then the CATHODE BALANCE controls for minimum meter deflection h Rotate the output attenuator fully clockwise zero attenuation i Adjust first the PLATE BALANCE and then the CATHODE BALANCE controls for minimum meter deflection Note meter indication j Adjust the PLATE BALANCE control slightly clockwise until a change in meter indication is...

Page 5: ...e absolute minimum meter deflection should be in the order of 20 dB If the two sections of the 6BC8 are not reasonably symmetrical optimum balancing cannot be obtained NOTE The fastest attack or release time is attained by turning the control full clockwise ...

Page 6: ...er in high gain position 37 dB MINIMUM INPUT LEVEL TO ACCOMPLISH LIMITING Jumper in low gain position 24 dBm Jumper in high gain position 24 dBm MAXIMUM OUTPUT AT THERSHOLD OF LIMITING 13 dBm INPUT AND OUTPUT IMPEDANCE 600 ohms unbalanced SIGNAL TO NOISE RATIO 80 dB COMPRESSION RATIO above threshold of limiting 12 to 1 ATTACK TIME Adjustable from 100 to 1000 microseconds REALEASE TIME Adjustable f...

Page 7: ...UNIVERSAL AUDIO Model 175 B LIMITING AMPLIFIER 7 ...

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