ATI Audio BU400B - Manual (Page 6)

Audio Technologies Inc. | 154 Cooper Road #902 | West Berlin, NJ 08091 | Voice 856-719-9900 | Fax 856-719-9903 | www. audio.com
OPERATING POINTS
An internal reference voltage equal to 1/2 the supply voltage is generated. All audio
stage IC inputs and outputs should show a DC level equal to this voltage when
measured with a high impedance meter. Audio inputs and outputs are capacitor
coupled and ground referenced.
PERFORMANCE SPECIFICATIONS:
BALANCED TO UNBALANCED AND UNBALANCED TO BALANCED
Gain: -14db nominal, -8db maximum. +14db nominal, +22db
maximum. User adjustable for -10dBu (.25V) User adjustable to
0, +4 or +8dBm output with 0, +4 or +8dBm inputs output with -
10dBu (.25V) input.
Nominal Levels:
+4dBm input, -10dBu (.25V) out -10dBu (.25V) in, +4dBm out
Peak Levels:
+22dBm in, +8dBu (2.0V) out +8dBu (2.0V) in, +22dBm out
Noise 20kHz B.W.:
-90dBu maximum output -80dBm maximum output
Harmonic Dist.:
.02% Max at Peak Level .02% max. at Peak Level 20Hz to
20kHz .005% max. at Nominal Level .005% max. at Nominal
Level
Frequency Resp.:
+.25dB, 20 to 20,000Hz +.25dB, 20 to 20,000 Hz
Crosstalk:
70dB minimum at 10kHz 70db minimum at 10kHz
Input Impedance:
Balanced, 20kohm bridging Unbalanced 10,000 ohms
Output Impedance:
Unbalanced, 1500 ohms max. Zs. Balanced, 40 ohms
maximum
Dimensions:
1.5"H by 5.5"W by 5.75"D; Weight: 1.5 Lbs. Net
Connectors:
XLR (balanced input/outputs) & RCA phono jacks (unbalanced
input/outputs)
Power:
24VDC @ .07A - BI100 & UB400, 24VDC @ .04A - BU400,
Connector sleeve is positive.
Models Available:
BI100 - Bi-Directional Stereo IHF to PRO
UB400 - Uni-Directional Quad IHF to Balanced
BU400 - Uni-Directional Quad Balanced to IHF