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Summary of Contents for ATI Technologies PB2X8
- Page 1 PB2X8 DISTRIBUTION AMPLIFIER OPERATING AND MAINTENANCE MANUAL © Copyright 2008, Audio Technologies Inc. Audio Technologies Inc. 856-719-9900 sales@atiaudio.com www. audio.com...
- Page 2 TRS jacks to prevent ground loop induced hum. PURPOSE Use your PB2X8 to clear out the usual forest of podium microphones by distributing just an unobtrusive single or back-up pair of microphones. Safely Isolate and distribute audio to all types of professional, semi-professional and consumer grade recorders with no interaction or hum loops.
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Page 3: Circuit Operation
Efficiently distribute stereo, left, right and summed mono audio from a single stereo microphone, IHF or 600 ohm line level source. CIRCUIT OPERATION Input signals applied to the rear panel XLR or TRS jacks are RF filtered by a ferrite balun and capacitor network and limited by zener clippers. Low noise balanced input instrumentation amplifier ICs A1 and A2 are individually switched to boost microphone inputs by 40dB (MIC position) or provide unity input gain for line level inputs (LINE position). -
Page 4: Installation
(or loop) input, be sure the shield switch is in the GND position. The XLR input jack’s pin 1 (shield) is permanently grounded. The wiring convention used on the PB2X8 XLR connectors is pin 2 HI, pin 3 LO, pin 1 shield. TRS connectors, Tip HI, Ring LO, Sleeve is shield. -
Page 5: Specifications
SPECIFICATIONS Output Levels XLR: +4dBm nominal, +22dBm max TRS: -10dBu (.25V), balanced or unbalanced, -50dBu via internal jumper plug Input Levels Microphone: -50dBm nominal from 50 to 600 ohm microphone Line: -10 to +4dBm nominal Distortion: 0.1% maximum THD, 20 Hz to 20 KHz +20dBm level Response: +0, -.25dB, 30Hz to 20kHz...
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