AD122-96 MX
Operations Manual
11
Part II:
Specifications
Analog Inputs:
The analog signal can be amplified by 0-12dB utilizing the front panel screw adjust trim pots. Full-
scale signal with 0dB gain is 24dBu, (full-scale signal with 12dB gain is 12dBu).
Input impedance over 0-100 kHz: greater than 20k ohm (pin 2 to pin 3).
Noise Floor at 44.1-48KHz sampling:
-130dB ±1dB from full scale A weighted
-126dB ±0.5dB from full scale unweighted
Noise Floor at 96KHz sampling:
-127dB ±1dB from full scale A weighted
-123dB ±1dB from full scale unweighted.
Notes:
1. Measuring noise floor with unconnected (opened) inputs may yield erroneous results.
Unconnected high impedance inputs may pick up unwanted signals.
2. Care must be exercised when measuring the noise floor. The signal applied to the converter
must be lower then the noise floor. Ordinary relays and switches may leak too much signal, and it
may be necessary to move a test tone signal to frequency above Nyquist (approx. 30KHz).
Output Bits: 16 to 24 bits, user selectable.
Total Harmonic Distortion and Noise:
(Specified for 22-24 Bits output, balanced inputs)
0.00005% for signals lower than -40dBF
0.0004% for signals lower than -20dBF
0.0008% for signals lower than -6dBF
Channel Separation:
Greater than 120dB (0-20KHz)
Sync. Inputs (connect to only one input at any time):
XLR connector:
AES/EBU levels into 110 Ohms for digital audio or TTL level into 110 Ohms
word clock
BNC connector:
TTL level word clock
A.C. Power:
90-264 VAC @ 47-63Hz , Fuses 0.5A Slow 250V Fuse Size 0.25inch x 1.25 inch
The power supply automatically adjusts to AC inputs in the range of 90 to 264 volts at line frequencies
between 47 and 63 Hz. It is not necessary to change any settings. The voltage selector in the power
input module on the back panel is wired to work properly in either position. Thus, either the “115V” or
“230V” legend can be visible and the unit will work properly with any input in the rated operating
range (the legend is visible through a small “window” and is white lettering on a red background).
