M522 — Input Module

5414-152/5414-1524 FILTER ASSEMBL JES The leif: channel section wil be described_ The rignl channe cperates an icentica manner and the mono channe makes ue tne left channe circuitry ony Mic Tre quency Stale Varianle Filter The Mid-Frequency state variable Tilter compriscs an inverting bufier amplitier UIA combining amplifier UIB arid Two low Pa;s ters made 4D U2A, U28 C6.C10 and the externa frequency controi R6 Tnc externl ectcr switch Sw2 affects the overal end [hereny contrclling V5 filter g2in The Mter input is applied P1-2 PI-1 and the Filter output appears The Mid-Frequency #2 stale variable filter made uD their asscialed components C17, Cz1 anc externa Cetermine the center resonant) frequency this filter 03, Ua and control High Frequency High Pass Filter USA buffers the high pass filter networt< from the external cut/poost, contro C26 C27 , R28 and external frequency contro RSA determine the corner requency the high pass ter USB butfers the ter frequency ceterminins components from the summing amplifier U3B the main equa zer assembly Low Frequency Low Pass Filter The low frequency sheiving network comprises external frequency control R5 R3O , C29 and C30 Buffer u6 isolates [he frequency determining components from the equalizers summing amplifier

M522/M522A EQUAL IZER MODULES INSERT INDICATOR DSI iuminates when the Insert Switch SW2 selected 3-2

M522/M522A EQUALIZER MODULES Note Specifications are based voltage levels 600 ohm system unless otherwise specified Gain: Unity +/-0 .25 dB_ Frequency Response +/-0.5 dB from Hz kHz with the equalizer inserted and cut/boost controls the detent positon Noise: dBm absolute (20 Hz cut/boost controls the kHz / equalizer detent position Harmonic Distortion: Less than from 20 Hz kHz +20 dBm output level less .

Less than 0.01% at kHz +20 dBm output level _ Source Impedance: Less than ohms unbalanced Input Impedance Greater than 4K ohms unbalanced_ Input Level 6dBm nominal +20 dBm maximum Output Impedance: Less than ohms unbalanced Lcad Impedance: SK ohms greater Output Level dBm nominal +22 dBm maximum. Channel Separation: Phasing: Greater than dB Input and output are phase with the equa izing controls the detent position Equalization Tracking: Within 0.5 dB _ Power Requirements: +/-25 volts dc (M522 40 ma) , (M522A 65 ma) Ambient Temperature: 60 degrees Celsius Dimensions: 60" wide 7.00" high 50" deep (41 mm 178 mm 165 mm ) Weight: M522 M522A (0.485 kg) net .

(0.565 kg_ net_ 1-1