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Description

The Audio Bit Spitter™ is a companion to the successful ABB-1 Audio Bit Buddy™, portable digital/analog audio monitor.  This portable, battery powered unit generates digital and stereo analog audio test signals that may be injected into the signal path when testing device performance or signal path continuity with an Audio Bit Buddy™.  The ABS-1 generates an AES/EBU digital audio signal, 1kHz or 400Hz, at the three most commonly used sampling rates of 48 kHz, 44.1 kHz or 32 kHz.  The unit may also be synchronized to an external digital reference signal.  Digital signal levels of -20, -12 and 0 dBFS are front panel selectable.  Stereo analog tones of 1 kHz or 400 Hz may also be selected at levels of -16, -8 and +4 dBu.  To distinguish between the CH A and CH B (left and right) signals, the unit provides the option to cycle and/or invert the CH B (right) signal or to turn it off completely.  A send invalid function on the ABS-1 sets invalid bits in the AES/EBU bit stream.  Powered by four rechargeable AA Nicad cells and equipped with a belt clip, the ABS-1 is always ready to go.  For bench work, the unit may also be powered via an AC adapter.  With the AC adapter plugged in, the batteries recharge while in use.  Balanced, 110 Ohm, AES/EBU connections are made via the appropriate XLR-3 type connectors located on the rear panel.  For unbalanced 75 Ohm circuits, use WBS in-line impedance converters, IMP-1F for the digital signal output and a WBS IMP-1M for the external reference input.  Balanced, low output impedance, stereo analog audio signals are provided on two tip-ring-sleeve jacks.