QSC Audio SPA-3 دليل المستخدم

ملخص المحتوى في الصفحة رقم 1

SPA-3
PERFORMANCE A C CESSORIES
Stereo Precision Attenuator
Basic Description
The SPA-3 is an externally mounted two-channel precision attenuator
accessory for DataPort-equipped QSC amplifiers. With pushbutton pro-
gramming and digital gain control, it offers precise, secure, and repeat-
able attenuation settings from 0 to 32 dB. It features optional input iso-
lation transformers custom-made for QSC by Jensen, providing superb
common-mode noise rejection for high-performance sound systems.
The

ملخص المحتوى في الصفحة رقم 2

8.8. 8.8. SPA-3 SPECIFIC ATIONS SPA-3 GENERAL INFORMATION 0–70° C Operating temperature Differential balanced (transformer balancing optional) Input type, each channel 28.4 kΩΩ balanced, 14.7 kΩΩ unbalanced Input impedance 95ΩΩ , quasi-balanced Output impedance, main +18 dBu Maximum RMS output voltage -116 dBr Noise (0 dBr = maximum output) <0.01% @ 1 kHz THD @ +4 dBu out 20 Hz–20 kHz, ±0.2 dB Frequency response >50 dB minimum; >60 dB typical Common-mode rejection +15V @ <300 mA, via external po